Waste Connections (WCN) 8-K 3 Aug 23 Other Events Financial data

Document and Entity Information

Document and Entity Information	Aug. 03, 2023
Document Information [Line Items]
Document Type	8-K
Document Period End Date	Aug. 03, 2023
Securities Act File Number	1-34370
Entity Registrant Name	Waste Connections, Inc.
Entity Incorporation, State or Country Code	A6
Entity Tax Identification Number	98-1202763
Entity Address, Address Line One	6220 Hwy 7
Entity Address, Address Line Two	Suite 600
Entity Address, City or Town	Woodbridge
Entity Address, State or Province	ON
Entity Address, Country	CA
Entity Address, Postal Zip Code	L4H 4G3
City Area Code	905
Local Phone Number	532-7510
Title of 12(b) Security	Common Shares, no par value
Trading Symbol	WCN
Security Exchange Name	NYSE
Written Communications	false
Soliciting Material	false
Pre-commencement Tender Offer	false
Pre-commencement Issuer Tender Offer	false
Entity Emerging Growth Company	false
Entity Central Index Key	0001318220
Amendment Flag	false

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current assets:
Cash and equivalents	$ 133,860	$ 78,637		$ 147,441
Accounts receivable, net of allowance for credit losses of $22,239 and $22,939 at March 31, 2023 and December 31, 2022, respectively	814,680	833,862		709,614
Prepaid expenses and other current assets	185,718	205,146		175,722
Total current assets	1,134,258	1,117,645		1,032,777
Restricted cash	106,625	102,727		72,174
Restricted investments	74,358	68,099		59,014
Property and equipment, net	6,956,620	6,950,915		5,721,949
Operating lease right-of-use assets	195,030	192,506		160,567
Goodwill	6,940,567	6,902,297	$ 6,427,763	6,187,643	$ 5,726,650
Intangible assets, net	1,697,193	1,673,917		1,350,597
Other assets, net	122,443	126,497		115,203
Total assets	17,227,094	17,134,603		14,699,924	13,992,364
Current liabilities:
Accounts payable	526,229	638,728		392,868
Book overdraft	21,067	15,645		16,721
Deferred revenue	336,613	325,002		273,720
Accrued liabilities	390,195	431,247		442,596
Current portion of operating lease liabilities	34,078	35,170		38,017
Current portion of contingent consideration	64,489	60,092		62,804
Current portion of long-term debt and notes payable	10,513	6,759		6,020
Total current liabilities	1,383,184	1,512,643		1,232,746
Long-term debt and notes payable	6,921,839	6,890,149		5,040,500
Long-term portion of operating lease liabilities	169,051	165,462		129,628
Long-term portion of contingent consideration	21,333	21,323		31,504
Deferred income taxes	1,041,152	1,013,742		850,921
Other long-term liabilities	451,571	417,640		421,080
Total liabilities	9,988,130	10,020,959		7,706,379
Commitments and contingencies (Note 18)
Equity:
Common shares: 257,547,090 shares issued and 257,487,434 shares outstanding at March 31, 2023; 257,211,175 shares issued and 257,145,716 shares outstanding at December 31, 2022	3,274,564	3,271,958		3,693,027
Additional paid-in capital	238,484	244,076		199,482
Accumulated other comprehensive income (loss)	(60,572)	(56,830)		39,584
Treasury shares: 59,656 and 65,459 shares at March 31, 2023 and December 31, 2022, respectively
Retained earnings	3,781,519	3,649,494		3,056,845
Total Waste Connections' equity	7,233,995	7,108,698		6,988,938
Noncontrolling interest in subsidiaries	4,969	4,946		4,607
Total equity	7,238,964	7,113,644	$ 6,759,059	6,993,545	$ 6,863,438	$ 6,938,354
Total liabilities and equity	$ 17,227,094	$ 17,134,603		$ 14,699,924

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Allowance for credit losses	$ 22,239	$ 22,939	$ 18,480
Common shares, shares issued	257,547,090	257,211,175	260,283,158
Common shares, shares outstanding	257,487,434	257,145,716	260,212,496
Treasury shares	59,656	65,459	70,662

Condensed Consolidated Statemen

Condensed Consolidated Statements of Net Income - USD ($) $ in Thousands	1 Months Ended		3 Months Ended		12 Months Ended
	Nov. 30, 2022	Oct. 31, 2022	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenues			$ 1,900,503	$ 1,646,255	$ 7,211,859	$ 6,151,361	$ 5,445,990
Operating expenses:
Cost of operations			1,146,941	989,518	4,336,012	3,654,074	3,276,808
Selling, general and administrative			193,667	163,414	696,467	612,337	537,632
Depreciation			204,059	179,950	763,285	673,730	621,102
Amortization of intangibles			39,282	37,635	155,675	139,279	131,302
Impairments and other operating items			1,865	1,878	18,230	32,316	466,718
Operating income			314,689	273,860	1,242,190	1,039,625	412,428
Interest expense			(68,353)	(41,324)	(202,331)	(162,796)	(162,375)
Interest income			2,715	137	5,950	2,916	5,253
Other income (expense), net			3,174	(3,466)	3,154	6,285	(1,392)
Loss on early extinguishment of debt					0	(115,288)	0
Income before income tax provision			252,225	229,207	1,048,963	770,742	253,914
Income tax provision			(54,389)	(48,839)	(212,962)	(152,253)	(49,922)
Net income			197,836	180,368	836,001	618,489	203,992
Plus (less): Net loss (income) attributable to noncontrolling interests			(23)	(44)	(339)	(442)	685
Net income attributable to Waste Connections			$ 197,813	$ 180,324	$ 835,662	$ 618,047	$ 204,677
Earnings per common share attributable to Waste Connections' common shareholders:
Basic			$ 0.77	$ 0.70	$ 3.25	$ 2.37	$ 0.78
Diluted			$ 0.77	$ 0.69	$ 3.24	$ 2.36	$ 0.78
Shares used in the per share calculations:
Basic			257,372,942	258,946,933	257,383,578	261,166,723	263,189,699
Diluted			257,988,971	259,560,983	258,038,801	261,728,470	263,687,539
Cash dividends per common share	$ 0.255	$ 0.23	$ 0.255	$ 0.230	$ 0.945	$ 0.845	$ 0.760

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Net income	$ 197,836	$ 180,368	$ 836,001	$ 618,489	$ 203,992
Other comprehensive income (loss), before tax:
Foreign currency translation adjustment	1,682	34,429	(157,336)	8,183	50,653
Other comprehensive income (loss), before tax	(5,697)	83,878	(74,449)	51,791	(4,233)
Income tax (expense) benefit related to items of other comprehensive income (loss)	1,955	(13,104)	(21,965)	(11,556)	14,545
Other comprehensive income (loss), net of tax	(3,742)	70,774	(96,414)	40,235	10,312
Comprehensive income	194,094	251,142	739,587	658,724	214,304
Plus (less): Comprehensive loss (income) attributable to noncontrolling interests	(23)	(44)	(339)	(442)	685
Comprehensive income attributable to Waste Connections	194,071	251,098	739,248	658,282	214,989
Interest Rate Swap [Member]
Other comprehensive income (loss), before tax:
Interest rate swap amounts reclassified into interest expense	(4,080)	4,750	6,551	20,321	9,778
Changes in fair value of interest rate swaps	$ (3,299)	$ 44,699	$ 76,336	$ 23,287	$ (64,664)

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Equity - USD ($) $ in Thousands	Common Stock Deferred Compensation Plan	Common Stock Performance Shares	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Retained Earnings	Noncontrolling Interests	Total
Cumulative effect adjustment from adoption of new accounting pronouncement			$ 4,135,343	$ 154,917	$ (10,963)		$ 2,654,207	$ 4,850	$ 6,938,354
Beginning Balances at Dec. 31, 2019			$ 4,135,343	154,917	(10,963)		2,654,207	4,850	6,938,354
Beginning Balances, shares at Dec. 31, 2019			263,618,161
Beginning Balance, treasury shares at Dec. 31, 2019						81,514
Sale of common shares held in trust			$ 679						679
Sale of common shares held in trust, shares			7,330			(7,330)
Vesting of restricted share units (shares)			377,006
Fair value adjustment for common shares in deferred compensation plan exchanged for other investment options				(678)					(678)
Tax withholdings related to net share settlements of equity-based compensation				(23,446)					(23,446)
Tax withholdings related to net share settlements of equity-based compensation, shares			(230,698)
Equity-based compensation				39,762					$ 39,762
Exercise of warrants			20,125
Repurchase of common shares (shares)			(1,271,977)						(1,271,977)
Repurchase of common shares			$ (105,654)						$ (105,654)
Cash dividends on common shares							(199,883)		(199,883)
Amounts reclassified into earnings, net of taxes					7,187				7,187
Changes in fair value of cash flow hedges, net of taxes					(47,528)				(47,528)
Foreign currency translation adjustment					50,653				50,653
Net income							204,677	(685)	203,992
Ending Balances at Dec. 31, 2020			$ 4,030,368	170,555	(651)		2,659,001	4,165	6,863,438
Ending Balances, shares at Dec. 31, 2020			262,824,990
Ending Balance, treasury shares at Dec. 31, 2020						74,184
Cumulative effect adjustment from adoption of new accounting pronouncement			$ 4,030,368	170,555	(651)		2,659,001	4,165	6,863,438
Sale of common shares held in trust			$ 430						430
Sale of common shares held in trust, shares			3,522			(3,522)
Vesting of restricted share units (shares)			343,480
Fair value adjustment for common shares in deferred compensation plan exchanged for other investment options				(1,177)					(1,177)
Tax withholdings related to net share settlements of equity-based compensation				(18,606)					(18,606)
Tax withholdings related to net share settlements of equity-based compensation, shares			(186,978)
Equity-based compensation				48,710					$ 48,710
Exercise of warrants			46,730
Repurchase of common shares (shares)			(3,003,822)						(3,003,822)
Repurchase of common shares			$ (338,993)						$ (338,993)
Issuance of shares under employee share purchase plan			$ 1,222						$ 1,222
Issuance of shares under employee share purchase plan, shares			10,813						10,813
Cash dividends on common shares							(220,203)		$ (220,203)
Amounts reclassified into earnings, net of taxes					14,936				14,936
Changes in fair value of cash flow hedges, net of taxes					17,116				17,116
Foreign currency translation adjustment					8,183				8,183
Net income							618,047	442	618,489
Ending Balances at Dec. 31, 2021			$ 3,693,027	199,482	39,584		3,056,845	4,607	$ 6,993,545
Ending Balances, shares at Dec. 31, 2021			260,212,496						260,212,496
Ending Balance, treasury shares at Dec. 31, 2021						70,662			70,662
Cumulative effect adjustment from adoption of new accounting pronouncement			$ 3,693,027	199,482	39,584		3,056,845	4,607	$ 6,993,545
Sale of common shares held in trust			$ 305						305
Sale of common shares held in trust, shares			2,203			(2,203)
Vesting of restricted share units (shares)	19,149	57,677	312,706
Tax withholdings related to net share settlements of equity-based compensation				(17,236)					(17,236)
Tax withholdings related to net share settlements of equity-based compensation, shares			(143,243)
Equity-based compensation				14,139					$ 14,139
Exercise of warrants			11,560
Repurchase of common shares (shares)			(3,388,155)						(3,388,155)
Repurchase of common shares			$ (424,999)						$ (424,999)
Issuance of shares under employee share purchase plan			$ 1,554						$ 1,554
Issuance of shares under employee share purchase plan, shares			12,015						12,015
Cash dividends on common shares							(59,391)		$ (59,391)
Amounts reclassified into earnings, net of taxes					3,491				3,491
Changes in fair value of cash flow hedges, net of taxes					32,854				32,854
Foreign currency translation adjustment					34,429				34,429
Net income							180,324	44	180,368
Ending Balances at Mar. 31, 2022			$ 3,269,887	196,385	110,358		3,177,778	4,651	6,759,059
Ending Balances, shares at Mar. 31, 2022			257,096,408
Ending Balance, treasury shares at Mar. 31, 2022						68,459,000
Beginning Balances at Dec. 31, 2021			$ 3,693,027	199,482	39,584		3,056,845	4,607	$ 6,993,545
Beginning Balances, shares at Dec. 31, 2021			260,212,496						260,212,496
Beginning Balance, treasury shares at Dec. 31, 2021						70,662			70,662
Sale of common shares held in trust			$ 660						$ 660
Sale of common shares held in trust, shares			5,203			(5,203)
Vesting of restricted share units (shares)			318,851
Tax withholdings related to net share settlements of equity-based compensation				(18,358)					(18,358)
Tax withholdings related to net share settlements of equity-based compensation, shares			(210,700)
Equity-based compensation				62,952					$ 62,952
Exercise of warrants			104,253
Repurchase of common shares (shares)			(3,388,155)						(3,388,155)
Repurchase of common shares			$ (424,999)						$ (424,999)
Issuance of shares under employee share purchase plan			$ 3,270						$ 3,270
Issuance of shares under employee share purchase plan, shares			26,582						26,582
Cash dividends on common shares							(243,013)		$ (243,013)
Amounts reclassified into earnings, net of taxes					4,815				4,815
Changes in fair value of cash flow hedges, net of taxes					56,107				56,107
Foreign currency translation adjustment					(157,336)				(157,336)
Net income							835,662	339	836,001
Ending Balances at Dec. 31, 2022			$ 3,271,958	244,076	(56,830)		3,649,494	4,946	$ 7,113,644
Ending Balances, shares at Dec. 31, 2022			257,145,716						257,145,716
Ending Balance, treasury shares at Dec. 31, 2022						65,459			65,459
Cumulative effect adjustment from adoption of new accounting pronouncement			$ 3,269,887	196,385	110,358		3,177,778	4,651	$ 6,759,059
Cumulative effect adjustment from adoption of new accounting pronouncement			3,271,958	244,076	(56,830)		3,649,494	4,946	7,113,644
Sale of common shares held in trust			$ 765						765
Sale of common shares held in trust, shares			5,803			(5,803)
Vesting of restricted share units (shares)	19,151	140,498	325,490
Tax withholdings related to net share settlements of equity-based compensation				(22,966)					(22,966)
Tax withholdings related to net share settlements of equity-based compensation, shares			(176,837)
Equity-based compensation				17,374					$ 17,374
Exercise of warrants			13,019
Repurchase of common shares (shares)									0
Issuance of shares under employee share purchase plan			$ 1,841						$ 1,841
Issuance of shares under employee share purchase plan, shares			14,594						14,594
Cash dividends on common shares							(65,788)		$ (65,788)
Amounts reclassified into earnings, net of taxes					(2,999)				(2,999)
Changes in fair value of cash flow hedges, net of taxes					(2,425)				(2,425)
Foreign currency translation adjustment					1,682				1,682
Net income							197,813	23	197,836
Ending Balances at Mar. 31, 2023			$ 3,274,564	238,484	(60,572)		3,781,519	4,969	$ 7,238,964
Ending Balances, shares at Mar. 31, 2023			257,487,434						257,487,434
Ending Balance, treasury shares at Mar. 31, 2023						59,656			59,656
Cumulative effect adjustment from adoption of new accounting pronouncement			$ 3,274,564	$ 238,484	$ (60,572)		$ 3,781,519	$ 4,969	$ 7,238,964

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities:
Net income	$ 197,836	$ 180,368	$ 836,001	$ 618,489	$ 203,992
Adjustments to reconcile net income to net cash provided by operating activities:
Loss on disposal of assets and impairments	1,910	2,090	9,519	27,727	445,647
Depreciation	204,059	179,950	763,285	673,730	621,102
Amortization of intangibles	39,282	37,635	155,675	139,279	131,302
Loss on early extinguishment of debt			0	115,288	0
Deferred income taxes, net of acquisitions	28,229	38,378	93,481	14,563	(50,487)
Current period provision for expected credit losses	2,247	3,022	17,353	9,719	15,509
Amortization of debt issuance costs	1,621	1,195	5,454	5,055	7,509
Share-based compensation	18,469	14,635	63,485	58,221	45,751
Interest accretion	4,884	4,448	17,668	15,970	17,205
Payment of contingent consideration recorded in earnings			(2,982)	(520)	(10,371)
Adjustments to contingent consideration	(637)	(52)	(1,030)	2,954	18,418
Other	(2,937)	382	(8,217)	(1,260)	2,426
Changes in operating assets and liabilities, net of effects from acquisitions:
Net change in operating assets and liabilities, net of acquisitions	(52,605)	(21,154)
Accounts receivable, net			(100,546)	(54,688)	31,332
Prepaid expenses and other current assets			(752)	(8,229)	(17,749)
Accounts payable			192,850	66,752	(148,362)
Deferred revenue			42,252	31,707	14,981
Accrued liabilities			(28,082)	3,853	88,612
Increase (Decrease) in Asset Retirement Obligations			(18,881)	(21,040)	(6,484)
Increase (Decrease) in Other Operating Liabilities			(14,041)	659	(1,812)
Net cash provided by operating activities	442,358	440,897	2,022,492	1,698,229	1,408,521
Cash flows from investing activities:
Payments for acquisitions, net of cash acquired	(144,611)	(355,212)	(2,206,901)	(960,449)	(388,789)
Capital expenditures for property and equipment	(175,786)	(152,318)	(912,677)	(744,315)	(597,053)
Capital expenditure for undeveloped landfill property			0	0	(67,508)
Investments in noncontrolling interests			0	(25,000)	0
Proceeds from disposal of assets	1,260	15,012	30,676	42,768	19,084
Other	1,378	2,637	1,731	(6,486)	(11,777)
Net cash used in investing activities	(317,759)	(489,881)	(3,087,171)	(1,693,482)	(1,046,043)
Cash flows from financing activities:
Proceeds from long-term debt	336,649	1,305,288	4,816,146	2,112,193	1,815,625
Principal payments on notes payable and long-term debt	(320,027)	(505,597)	(3,073,985)	(1,893,100)	(1,542,958)
Premiums paid on early extinguishment of debt			0	(110,617)	0
Payment of contingent consideration recorded at acquisition date	(1,319)	(3,571)	(16,911)	(12,934)	(12,566)
Change in book overdraft	5,421	87	(1,076)	(367)	1,096
Payments for repurchase of common shares		(424,999)	(424,999)	(338,993)	(105,654)
Payments for cash dividends	(65,788)	(59,391)	(243,013)	(220,203)	(199,883)
Tax withholdings related to net share settlements of equity-based compensation	(22,966)	(17,236)	(18,358)	(18,606)	(23,446)
Debt issuance costs		(4,382)	(13,271)	(18,521)	(11,117)
Proceeds from issuance of shares under employee share purchase plan	1,841	1,554	3,270	1,222	0
Proceeds from sale of common shares held in trust	765	305	660	430	679
Net cash provided by (used in) financing activities	(65,424)	292,058	1,028,463	(499,496)	(78,224)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(54)	595	(2,035)	(25)	6,914
Net increase in cash, cash equivalents and restricted cash	59,121	243,669	(38,251)	(494,774)	291,168
Cash, cash equivalents and restricted cash at beginning of period	181,364	219,615	219,615	714,389	423,221
Cash, cash equivalents and restricted cash at end of period	240,485	463,284	181,364	219,615	714,389
SUPPLEMENTARY DISCLOSURES OF CASH FLOW INFORMATION AND NON-CASH TRANSACTIONS:
Cash paid for income taxes			100,156	146,198	104,618
Cash paid for interest			177,424	157,485	142,310
Changes in accrued capital expenditures for property and equipment			36,671	22,153	(10,940)
In connection with its acquisitions, the Company assumed liabilities as follows:
Fair value of assets acquired			2,471,202	1,230,396	514,234
Payments for acquisitions, net of cash acquired	(144,611)	(355,212)	(2,206,901)	(960,449)	(388,789)
Working capital settlements receivable			0	0	(1,505)
Liabilities assumed and notes payable issued to sellers of businesses acquired	$ 34,224	$ 40,122	$ 264,301	$ 269,947	$ 123,940

Basis of Presentation and Summa

Basis of Presentation and Summary	3 Months Ended
	Mar. 31, 2023
Basis Of Presentation And Summary [Line Items]
Basis of Presentation and Summary	1. The accompanying condensed consolidated financial statements relate to Waste Connections, Inc. and its subsidiaries (the “Company”) for the three month periods ended March 31, 2023 and 2022. In the opinion of management, the accompanying balance sheets and related interim statements of net income, comprehensive income, cash flows and equity include all adjustments, consisting only of normal recurring items, necessary for their fair statement in conformity with U.S. generally accepted accounting principles (“GAAP”). Preparing financial statements requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses. Examples include accounting for landfills, self-insurance accruals, income taxes, allocation of acquisition purchase price, contingent consideration accruals and asset impairments. An additional area that involves estimation is when the Company estimates the amount of potential exposure it may have with respect to litigation, claims and assessments in accordance with the accounting guidance on contingencies. Actual results for all estimates could differ materially from the estimates and assumptions that the Company uses in the preparation of its condensed consolidated financial statements. Interim results are not necessarily indicative of results for a full year. These interim financial statements should be read in conjunction with the financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2022.

Reporting Currency

Reporting Currency	3 Months Ended
	Mar. 31, 2023
Reporting Currency [Line Items]
Reporting Currency	2. The functional currency of the Company, as the parent corporate entity, and its operating subsidiaries in the United States, is the U.S. dollar. The functional currency of the Company’s Canadian operations is the Canadian dollar. The reporting currency of the Company is the U.S. dollar. The Company’s consolidated Canadian dollar financial position is translated to U.S. dollars by applying the foreign currency exchange rate in effect at the consolidated balance sheet date. The Company’s consolidated Canadian dollar results of operations and cash flows are translated to U.S. dollars by applying the average foreign currency exchange rate in effect during the reporting period. The resulting translation adjustments are included in other comprehensive income or loss. Gains and losses from foreign currency transactions are included in earnings for the period.

New Accounting Standards

New Accounting Standards	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Standards and Reclassifications	3. Accounting Standards Pending Adoption Clawback of Executive Compensation Rules ​	2. NEW ACCOUNTING STANDARDS Accounting Standards Adopted Reference Rate Reform – Facilitation of the Effects of Reference Rate Reform on Financial Reporting . In March 2020, the Financial Accounting Standards Board (“FASB”) issued guidance to provide temporary optional expedients and exceptions to the guidance in GAAP on contract modifications and hedge accounting to ease the financial reporting burdens related to the expected market transition from the London Interbank Offered Rate (“LIBOR”) and other interbank offered rates to alternative reference rates, such as the Secured Overnight Financing Rate (“SOFR”). One-week and two-month U.S. dollar LIBOR settings as well as all non-U.S. dollar LIBOR settings stopped being published on December 31, 2021, while the remaining U.S. dollar LIBOR settings will be discontinued on June 30, 2023. Under the new guidance, entities can elect not to apply certain modification accounting requirements to contracts affected by reference rate reform, if certain criteria are met. An entity that makes this election would not have to remeasure the contracts at the modification date or reassess a previous accounting determination. Under the guidance, entities can also elect various optional expedients that would allow them to continue applying hedge accounting for hedging relationships affected by reference rate reform, if certain criteria are met. The guidance was effective upon issuance. The guidance on contract modifications was applied prospectively from March 12, 2020. The guidance on hedging is applied to eligible hedging relationships existing as of the beginning of the interim period that includes the effective date and to new eligible hedging relationships entered into after the beginning of that interim period. The relief is temporary and generally cannot be applied to contract modifications that occur after December 31, 2024 or hedging relationships entered into or evaluated after that date. However, certain optional expedients can be applied to hedging relationships evaluated in periods after December 31, 2024. In October 2022, the Company adopted the applicable practical expedients of the standard when it converted the option of a LIBOR interest rate in its Credit Agreement to a SOFR interest rate and correspondingly amended its five interest rate swap agreements that are specifically designated to the amended Credit Agreement. As permitted by the practical expedients in the standard, the Company maintained cash flow hedge accounting for its interest rate swap agreements as the conversion of the LIBOR interest rate to SOFR was the only modification to the interest rate swap agreements. The Company determined that the new guidance did not have a material effect on its consolidated financial statements. See Note 11 for further details on the amendment to the Credit Agreement . Accounting Standards Pending Adoption Clawback of Executive Compensation Rules providing for the recovery of incentive-based compensation received by current and former executive officers in the event of a required accounting restatement when that compensation was based on an erroneously reported financial reporting measure. The new rule and related amendments include a number of new disclosure requirements, including requiring issuers to file their recovery policy as an exhibit to their annual reports and establishing new cover page disclosures on Form 10-K indicating whether the financial statements included in the filing reflect the correction of an error and whether the error correction required an incentive-based compensation recovery analysis. The exchanges must file proposed listing standards to implement the SEC’s directive no later than February 26, 2023 (which is 90 days after the final rules were published in the Federal Register), and those listing standards must be effective no later than November 28, 2023. Affected issuers will be required to adopt a recovery policy no later than 60 days after the listing standards become effective.

Revenue

Revenue	3 Months Ended
	Mar. 31, 2023
Disaggregation of Revenue [Line Items]
Revenue	4. The Company’s operations primarily consist of providing non-hazardous waste collection, transfer, disposal and recycling services, non-hazardous oil and natural gas exploration and production (“E&P”) waste treatment, recovery and disposal services and intermodal services. The following table disaggregates the Company’s revenues by service line for the periods indicated: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 31, ​ ​ 2023 2022 Commercial ​ $ 602,279 ​ $ 499,676 Residential ​ ​ 514,053 ​ ​ 440,288 ​ Industrial and construction roll off ​ ​ 318,315 ​ ​ 259,488 ​ Total collection ​ ​ 1,434,647 ​ ​ 1,199,452 ​ Landfill ​ ​ 343,433 ​ ​ 299,765 ​ Transfer ​ ​ 273,521 ​ ​ 217,957 ​ Recycling ​ ​ 31,301 ​ ​ 63,094 ​ E&P ​ ​ 51,759 ​ ​ 43,555 ​ Intermodal and other ​ ​ 38,212 ​ ​ 45,693 ​ Intercompany ​ ​ (272,370) ​ ​ (223,261) ​ Total ​ $ 1,900,503 ​ $ 1,646,255 ​ The factors that impact the timing and amount of revenue recognized for each service line may vary based on the nature of the service performed. Generally, the Company recognizes revenue at the time it performs a service. In the event that the Company bills for services in advance of performance, it recognizes deferred revenue for the amount billed and subsequently recognizes revenue at the time the service is provided. Substantially all of the deferred revenue recorded as of December 31, 2022 was recognized as revenue during the three months ended March 31, 2023 when the service was performed. See Note 10 for additional information regarding revenue by reportable segment. Contract Acquisition Costs The incremental direct costs of obtaining a contract, which consist of sales incentives, are recognized as Other assets in the Company’s Condensed Consolidated Balance Sheets, and are amortized to Selling, general and administrative expense over the estimated life of the relevant customer relationship, which ranges from one

Accounts Receivable

Accounts Receivable	3 Months Ended
	Mar. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable	5. ACCOUNTS RECEIVABLE Accounts receivable are recorded when billed or accrued and represent claims against third parties that will be settled in cash. The carrying value of the Company’s receivables, net of the allowance for credit losses, represents their estimated net realizable value. The allowance for credit losses is based on management’s assessment of the collectability of assets pooled together with similar risk characteristics. The Company monitors the collectability of its trade receivables as one overall pool due to all trade receivables having similar risk characteristics. The Company estimates its allowance for credit losses based on historical collection trends, the age of outstanding receivables, geographical location of the customer, existing economic conditions and reasonable forecasts. If events or changes in circumstances indicate that specific receivable balances may be impaired, further consideration is given to the collectability of those balances and the allowance is adjusted accordingly. Past-due receivable balances are written off when the Company’s internal collection efforts have been unsuccessful in collecting the amount due. The following is a rollforward of the Company’s allowance for credit losses for the periods indicated: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 31, ​ ​ 2023 2022 Beginning balance ​ $ 22,939 ​ $ 18,480 Current period provision for expected credit losses ​ ​ 2,247 ​ ​ 3,022 Write-offs charged against the allowance ​ ​ (5,017) ​ ​ (3,435) Recoveries collected ​ ​ 2,068 ​ ​ 1,272 Impact of changes in foreign currency ​ ​ 2 ​ ​ 22 Ending balance ​ $ 22,239 ​ $ 19,361 ​

Landfill Accounting

Landfill Accounting	3 Months Ended
	Mar. 31, 2023
Landfill Accounting [Line Items]
Landfill Accounting	6 . At March 31, 2023, the Company’s landfills consisted of 89 owned landfills, five landfills operated under life-of-site operating agreements and seven landfills operated under limited-term operating agreements. The Company’s landfills had site costs with a net book value of $3,284,137 at March 31, 2023. For the Company’s landfills operated under limited-term operating agreements and life-of-site operating agreements, the owner of the property (generally a municipality) usually owns the permit and the Company operates the landfill for a contracted term. Where the contracted term is not the life of the landfill, the property owner is generally responsible for final capping, closure and post-closure obligations. The Company is responsible for all final capping, closure and post-closure liabilities at the landfills it operates under life-of-site operating agreements. The Company’s internal and third-party engineers perform surveys at least annually to estimate the remaining disposal capacity at its landfills. Many of the Company’s existing landfills have the potential for expanded disposal capacity beyond the amount currently permitted. The Company’s landfill depletion rates are based on the remaining disposal capacity, considering both permitted and probable expansion airspace, at the landfills it owns and landfills it operates, but does not own, under life-of-site agreements. The Company’s landfill depletion rate is based on the term of the operating agreement at its operated landfill that has capitalized expenditures. Expansion airspace consists of additional disposal capacity being pursued through means of an expansion that has not yet been permitted. Expansion airspace that meets certain criteria is included in the estimate of total landfill airspace. Based on remaining permitted capacity as of March 31, 2023, and projected annual disposal volumes, the average remaining landfill life for the Company’s owned landfills and landfills operated under life-of-site operating agreements is estimated to be approximately 31 years. As of March 31, 2023, the Company is seeking to expand permitted capacity at ten of its owned landfills and two landfills that it operates under life-of-site operating agreements, and considers the achievement of these expansions to be probable. Although the Company cannot be certain that all future expansions will be permitted as designed, the average remaining life, when considering remaining permitted capacity, probable expansion capacity and projected annual disposal volume, of the Company’s owned landfills and landfills operated under life-of-site operating agreements is approximately 34 years. The estimated remaining lives of the Company’s owned landfills and landfills operated under life-of-site operating agreements range from 2 to 308 years, with approximately 90% of the projected annual disposal volume from landfills with remaining lives of less than 70 years. During the three months ended March 31, 2023 and 2022, the Company expensed $59,055 and $53,826, respectively, or an average of $5.06 and $4.90 per ton consumed, respectively, related to landfill depletion at owned landfills and landfills operated under life-of-site agreements. The Company reserves for estimated final capping, closure and post-closure maintenance obligations at the landfills it owns and landfills it operates under life-of-site operating agreements. The Company calculates the net present value of its final capping, closure and post-closure liabilities by estimating the total obligation in current dollars, inflating the obligation based upon the expected date of the expenditure and discounting the inflated total to its present value using a credit-adjusted risk-free rate. Any changes in expectations that result in an upward revision to the estimated undiscounted cash flows are treated as a new liability and are inflated and discounted at rates reflecting market conditions. Any changes in expectations that result in a downward revision (or no revision) to the estimated undiscounted cash flows result in a liability that is inflated and discounted at rates reflecting the market conditions at the time the cash flows were originally estimated. This policy results in the Company’s final capping, closure and post-closure liabilities being recorded in “layers.” The Company’s discount rate assumption for purposes of computing “layers” for final capping, closure and post-closure liabilities is based on its long-term credit adjusted risk-free rate. The Company’s discount rate assumption for purposes of computing 2023 and 2022 “layers” for final capping, closure and post-closure obligations is 5.50% for 2023 and ranged from 3.25% to 5.50% for 2022. The Company’s long-term inflation rate assumption is 2.75% for the year ending December 31, 2023 and ranged from 2.25% to 2.75% for the year ending December 31, 2022. The resulting final capping, closure and post-closure obligations are recorded on the Condensed Consolidated Balance Sheets along with an offsetting addition to site costs which is amortized to depletion expense as the remaining landfill airspace is consumed. Interest is accreted on the recorded liability using the corresponding discount rate. During the three months ended March 31, 2023 and 2022, the Company expensed $4,474 and $4,050, respectively, or an average of $0.38 and $0.37 per ton consumed, respectively, related to final capping, closure and post-closure accretion expense. The following is a reconciliation of the Company’s final capping, closure and post-closure liability balance from December 31, 2022 to March 31, 2023: ​ ​ ​ ​ ​ Final capping, closure and post-closure liability at December 31, 2022 $ 344,606 Liability adjustments ​ 14,704 Accretion expense associated with landfill obligations ​ 4,474 Closure payments ​ (5,346) Assumption of closure liabilities from acquisitions ​ ​ 3,443 Foreign currency translation adjustment ​ 24 Final capping, closure and post-closure liability at March 31, 2023 ​ $ 361,905 ​ Liability adjustments of $14,704 for the three months ended March 31, 2023, represent non-cash changes to final capping, closure and post-closure liabilities and are recorded on the Condensed Consolidated Balance Sheets along with an offsetting addition to site costs, which is amortized to depletion expense as the remaining landfill airspace is consumed. The final capping, closure and post-closure liability is included in Other long-term liabilities in the Condensed Consolidated Balance Sheets. The Company performs its annual review of its cost and capacity estimates in the first quarter of each year. At March 31, 2023 and December 31, 2022, $8,130 and $6,890, respectively, of the Company’s restricted cash balance and $62,552 and $57,469, respectively, of the Company’s restricted investments balance was for purposes of securing its performance of future final capping, closure and post-closure obligations.

Acquisitions

Acquisitions	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Acquisitions [Abstract]
Acquisitions	7. The Company acquired four individually immaterial non-hazardous solid waste collection, transfer, recycling and disposal businesses during the three months ended March 31, 2023. The total transaction-related expenses incurred during the three months ended March 31, 2023 for these acquisitions were $2,081. These expenses are included in Selling, general and administrative expenses in the Company’s Condensed Consolidated Statements of Net Income. The Company acquired four individually immaterial non-hazardous solid waste collection, transfer and recycling businesses during the three months ended March 31, 2022. The total transaction-related expenses incurred during the three months ended March 31, 2022 for these acquisitions were $4,540. These expenses are included in Selling, general and administrative expenses in the Company’s Condensed Consolidated Statements of Net Income. The results of operations of the acquired businesses have been included in the Company’s Condensed Consolidated Financial Statements from their respective acquisition dates. The Company expects these acquired businesses to contribute towards the achievement of the Company’s strategy to expand through acquisitions. Goodwill acquired is attributable to the synergies and ancillary growth opportunities expected to arise after the Company’s acquisition of these businesses. The following table summarizes the consideration transferred to acquire these businesses and the preliminary amounts of identifiable assets acquired and liabilities assumed at the acquisition dates for the acquisitions consummated in the three months ended March 31, 2023 and 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ 2023 2022 ​ ​ Acquisitions ​ Acquisitions Fair value of consideration transferred: ​ ​ Cash ​ $ 144,611 ​ $ 355,212 Debt assumed ​ 17,097 ​ — ​ ​ 161,708 ​ 355,212 ​ ​ ​ ​ ​ ​ ​ Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired: ​ ​ ​ ​ Accounts receivable ​ 3,882 ​ 9,211 Prepaid expenses and other current assets ​ 2,290 ​ 2,059 Restricted investments ​ ​ 5,462 ​ ​ — Operating lease right-of-use assets ​ ​ 587 ​ ​ 1,715 Property and equipment ​ 67,201 ​ 89,565 Long-term franchise agreements and contracts ​ 58,630 ​ 4,994 Customer lists ​ 1,527 ​ 38,944 Permits and other intangibles ​ ​ 2,403 ​ ​ 34,245 Accounts payable and accrued liabilities ​ (4,159) ​ (20,382) Current portion of operating lease liabilities ​ ​ (53) ​ ​ (830) Deferred revenue ​ (761) ​ (3,077) Contingent consideration ​ (6,000) ​ (5,000) Long-term portion of operating lease liabilities ​ ​ (534) ​ ​ (885) Other long-term liabilities ​ (4,543) ​ (631) Deferred income taxes ​ (1,077) ​ (9,317) Total identifiable net assets ​ 124,855 ​ 140,611 Goodwill ​ $ 36,853 ​ $ 214,601 ​ Goodwill acquired during the three months ended March 31, 2023 and 2022, totaling $36,853 and $80,455, respectively, is expected to be deductible for tax purposes. The fair value of acquired working capital related to 10 individually immaterial acquisitions completed during the twelve months ended March 31, 2023, is provisional pending receipt of information from the acquirees to support the fair value of the assets acquired and liabilities assumed. Any adjustments recorded relating to finalizing the working capital for these 10 acquisitions are not expected to be material to the Company’s financial position. The gross amount of trade receivables due under contracts acquired during the three months ended March 31, 2023, was $4,164, of which $282 was expected to be uncollectible. The gross amount of trade receivables due under contracts acquired during the three months ended March 31, 2022, was $11,412, of which $2,201 was expected to be uncollectible. The Company did not acquire any other class of receivable as a result of the acquisition of these businesses.	8. ACQUISITIONS The Company recognizes, separately from goodwill, the identifiable assets acquired and liabilities assumed at their estimated acquisition date fair values. The Company measures and recognizes goodwill as of the acquisition date as the excess of: (a) the aggregate of the fair value of consideration transferred, the fair value of the noncontrolling interest in the acquiree (if any) and the acquisition date fair value of the Company’s previously held equity interest in the acquiree (if any), over (b) the fair value of assets acquired and liabilities assumed. If information about facts and circumstances existing as of the acquisition date is incomplete by the end of the reporting period in which a business combination occurs, the Company will report provisional amounts for the items for which the accounting is incomplete. The measurement period ends once the Company receives the information it was seeking; however, this period will not exceed one year from the acquisition date. Any material adjustments recognized during the measurement period will be reflected prospectively in the period the adjustment is identified in the consolidated financial statements. The Company recognizes acquisition-related transaction costs as expense. The Company acquired 24 individually immaterial non-hazardous solid waste collection, transfer, recycling and disposal businesses during the year ended December 31, 2022. The total transaction-related expenses incurred during the year ended December 31, 2022 for these acquisitions was $24,933. These expenses are included in Selling, general and administrative expenses in the Company’s Consolidated Statements of Net Income. The Company acquired 30 individually immaterial non-hazardous solid waste collection, transfer, recycling and disposal businesses during the year ended December 31, 2021. The purchase consideration recorded during this period for nine of the acquired businesses included contingent consideration based upon the receipt of contract assignments and the achievement of certain targets, including future asset and revenue growth. The fair value of the total contingent consideration recorded during the year ended December 31, 2021 of $31,616 was determined using probability assessments of the expected future cash flows over a one The Company acquired 21 individually immaterial non-hazardous solid waste collection, transfer, recycling and disposal businesses during the year ended December 31, 2020. The total transaction-related expenses incurred during the year ended December 31, 2020 for these acquisitions was $9,803. These expenses are included in Selling, general and administrative expenses in the Company’s Consolidated Statements of Net Income. The results of operations of the acquired businesses have been included in the Company’s consolidated financial statements from their respective acquisition dates. The Company expects these acquired businesses to contribute towards the achievement of the Company’s strategy to expand through acquisitions. Goodwill acquired is attributable to the synergies and ancillary growth opportunities expected to arise after the Company’s acquisition of these businesses. The following table summarizes the consideration transferred to acquire these businesses and the amounts of identifiable assets acquired and liabilities assumed at the acquisition dates for the acquisitions consummated in the years ended December 31, 2022, 2021 and 2020: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2022 2021 2020 ​ ​ Acquisitions ​ Acquisitions ​ Acquisitions Fair value of consideration transferred: ​ ​ ​ Cash ​ $ 2,206,901 ​ $ 960,449 ​ $ 388,789 Debt assumed ​ 127,136 ​ 108,345 ​ 91,349 Change in open working capital settlements at year end ​ ​ — ​ ​ — ​ ​ 1,505 ​ ​ 2,334,037 ​ 1,068,794 ​ 481,643 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired: ​ ​ ​ ​ ​ Accounts receivable ​ 49,696 ​ 33,236 ​ 13,759 Prepaid expenses and other current assets ​ 9,428 ​ 4,866 ​ 4,509 Restricted investments ​ ​ 7,469 ​ ​ — ​ ​ — Operating lease right-of-use assets ​ ​ 4,707 ​ ​ 5,972 ​ ​ 5,247 Property and equipment ​ 1,073,155 ​ 394,687 ​ 173,394 Long-term franchise agreements and contracts ​ 239,866 ​ 134,827 ​ 59,149 Indefinite-lived intangibles ​ — ​ 9,557 ​ 13,465 Customer lists ​ 74,940 ​ 75,612 ​ 48,512 Permits and other intangibles ​ ​ 187,107 ​ ​ 116,967 ​ ​ 10,507 Other assets ​ 243 ​ 77 ​ 389 Accounts payable and accrued liabilities ​ (56,633) ​ (37,827) ​ (14,174) Current portion of operating lease liabilities ​ ​ (1,546) ​ ​ (1,370) ​ ​ (509) Deferred revenue ​ (10,761) ​ (8,389) ​ (1,821) Contingent consideration ​ (6,642) ​ (31,616) ​ (4,688) Long-term portion of operating lease liabilities ​ ​ (3,161) ​ ​ (4,602) ​ ​ (4,738) Other long-term liabilities ​ (6,915) ​ (13,976) ​ (2,136) Deferred income taxes ​ (51,507) ​ (63,822) ​ (4,525) Total identifiable net assets ​ 1,509,446 ​ 614,199 ​ 296,340 Goodwill ​ $ 824,591 ​ $ 454,595 ​ $ 185,303 ​ Goodwill acquired in 2022 totaling $510,755 is expected to be deductible for tax purposes. Goodwill acquired in 2021 totaling $187,287 is expected to be deductible for tax purposes. Goodwill acquired in 2020 totaling $169,147 is expected to be deductible for tax purposes. The fair value of acquired working capital related to 17 individually immaterial acquisitions completed during the year ended December 31, 2022, is provisional pending receipt of information from the acquirees to support the fair value of the assets acquired and liabilities assumed. Any adjustments recorded relating to finalizing the working capital for these 17 acquisitions are not expected to be material to the Company’s financial position. The gross amount of trade receivables due under contracts acquired during the year ended December 31, 2022, was $54,332, of which $4,636 was expected to be uncollectible. The gross amount of trade receivables due under contracts acquired during the year ended December 31, 2021, was $36,645, of which $3,409 was expected to be uncollectible. The gross amount of trade receivables due under contracts acquired during the year ended December 31, 2020, was $13,854, of which $95 was expected to be uncollectible. The Company did not acquire any other class of receivable as a result of the acquisition of these businesses.

Intangible Assets, Net

Intangible Assets, Net	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Intangible Assets, Net [Abstract]
Intangible Assets, Net	8. Intangible assets, exclusive of goodwill, consisted of the following at March 31, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross ​ ​ Accumulated Net ​ ​ Carrying ​ Accumulated ​ Impairment ​ Carrying ​ ​ Amount ​ Amortization ​ Loss ​ Amount Finite-lived intangible assets: ​ ​ ​ ​ Long-term franchise agreements and contracts ​ $ 975,058 ​ $ (312,988) ​ $ — ​ $ 662,070 Customer lists ​ 778,352 ​ (545,232) ​ — ​ 233,120 Permits and other ​ 782,166 ​ (120,992) ​ (40,784) ​ 620,390 ​ ​ 2,535,576 ​ (979,212) ​ (40,784) ​ 1,515,580 Indefinite-lived intangible assets: ​ ​ ​ ​ Solid waste collection and transportation permits ​ 181,613 ​ — ​ — ​ 181,613 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Intangible assets, exclusive of goodwill ​ $ 2,717,189 ​ $ (979,212) ​ $ (40,784) ​ $ 1,697,193 ​ The weighted-average amortization period of long-term franchise agreements and contracts acquired during the three months ended March 31, 2023 was 25.0 years. The weighted-average amortization period of customer lists acquired during the three months ended March 31, 2023 was 11.5 years. The weighted-average amortization period of finite-lived permits and other acquired during the three months ended March 31, 2023 was 40.0 years. Intangible assets, exclusive of goodwill, consisted of the following at December 31, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross ​ ​ Accumulated Net ​ ​ Carrying ​ Accumulated ​ Impairment ​ Carrying ​ ​ Amount ​ Amortization ​ Loss ​ Amount Finite-lived intangible assets: ​ ​ ​ ​ Long-term franchise agreements and contracts ​ $ 916,582 ​ $ (297,382) ​ $ — ​ $ 619,200 Customer lists ​ 776,719 ​ (527,425) ​ — ​ 249,294 Permits and other ​ 779,689 ​ (115,095) ​ (40,784) ​ 623,810 ​ ​ 2,472,990 ​ (939,902) ​ (40,784) ​ 1,492,304 Indefinite-lived intangible assets: ​ ​ ​ ​ Solid waste collection and transportation permits ​ 181,613 ​ — ​ — ​ 181,613 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Intangible assets, exclusive of goodwill ​ $ 2,654,603 ​ $ (939,902) ​ $ (40,784) ​ $ 1,673,917 ​ Estimated future amortization expense for the next five years relating to finite-lived intangible assets owned as of March 31, 2023 is as follows: ​ ​ ​ ​ ​ For the year ending December 31, 2023 $ 156,320 For the year ending December 31, 2024 ​ $ 141,755 For the year ending December 31, 2025 ​ $ 124,919 For the year ending December 31, 2026 ​ $ 109,325 For the year ending December 31, 2027 ​ $ 95,730 ​	9. INTANGIBLE ASSETS, NET Intangible assets, exclusive of goodwill, consisted of the following at December 31, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross ​ ​ Accumulated Net ​ ​ Carrying ​ Accumulated ​ Impairment ​ Carrying ​ ​ Amount ​ Amortization ​ Loss ​ Amount Finite-lived intangible assets: ​ ​ ​ ​ Long-term franchise agreements and contracts ​ $ 916,582 ​ $ (297,382) ​ $ — ​ $ 619,200 Customer lists ​ 776,719 ​ (527,425) ​ — ​ 249,294 Permits and other ​ 779,689 ​ (115,095) ​ (40,784) ​ 623,810 ​ ​ 2,472,990 ​ (939,902) ​ (40,784) ​ 1,492,304 Indefinite-lived intangible assets: ​ ​ ​ ​ Solid waste collection and transportation permits ​ 181,613 ​ — ​ — ​ 181,613 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Intangible assets, exclusive of goodwill ​ $ 2,654,603 ​ $ (939,902) ​ $ (40,784) ​ $ 1,673,917 ​ The weighted-average amortization period of long-term franchise agreements and contracts acquired during the year ended December 31, 2022 was 28.9 years. The weighted-average amortization period of customer lists acquired during the year ended December 31, 2022 was 11.5 years. The weighted-average amortization period of finite-lived permits and other acquired during the year ended December 31, 2022 was 40.0 years. ​ Intangible assets, exclusive of goodwill, consisted of the following at December 31, 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross ​ ​ Accumulated Net ​ ​ Carrying ​ Accumulated ​ Impairment ​ Carrying ​ ​ Amount ​ Amortization ​ Loss ​ Amount Finite-lived intangible assets: ​ ​ ​ ​ Long-term franchise agreements and contracts ​ $ 724,128 ​ $ (278,827) ​ $ — ​ $ 445,301 Customer lists ​ 711,047 ​ (450,109) ​ — ​ 260,938 Permits and other ​ 598,336 ​ (94,807) ​ (40,784) ​ 462,745 ​ ​ 2,033,511 ​ (823,743) ​ (40,784) ​ 1,168,984 Indefinite-lived intangible assets: ​ ​ ​ ​ Solid waste collection and transportation permits ​ 181,613 ​ — ​ — ​ 181,613 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Intangible assets, exclusive of goodwill ​ $ 2,215,124 ​ $ (823,743) ​ $ (40,784) ​ $ 1,350,597 ​ Estimated future amortization expense for the next five years relating to finite-lived intangible assets is as follows: ​ ​ ​ ​ ​ For the year ending December 31, 2023 $ 153,457 For the year ending December 31, 2024 ​ $ 135,884 For the year ending December 31, 2025 ​ $ 119,071 For the year ending December 31, 2026 ​ $ 103,541 For the year ending December 31, 2027 ​ $ 89,959 ​

Leases

Leases	12 Months Ended
	Dec. 31, 2022
Lessee Disclosure [Abstract]
Leases	7. LEASES The Company rents certain equipment and facilities under short-term agreements, non-cancelable operating lease agreements and finance leases. The Company determines if an arrangement is or contains a lease at contract inception. The Company recognizes a right-of-use (“ROU”) asset and a lease liability at the lease commencement date. The lease liability is initially measured at the present value of the unpaid lease payments at the lease commencement date. Key estimates and judgments include how the Company determines (1) the discount rate it uses to discount the unpaid lease payments to present value, (2) lease term and (3) lease payments. The lease guidance requires a lessee to discount its unpaid lease payments using the interest rate implicit in the lease or, if that rate cannot be readily determined, its incremental borrowing rate. Generally, the Company cannot determine the interest rate implicit in the lease because it does not have access to the lessor’s estimated residual value or the amount of the lessor’s deferred initial direct costs. Therefore, the Company generally uses its incremental borrowing rate as the discount rate for the lease. The Company’s incremental borrowing rate for a lease is the rate of interest it would have to pay on a collateralized basis to borrow an amount equal to the lease payments under similar terms. The lease term for the Company’s leases includes the noncancelable period of the lease, plus any additional periods covered by either a Company option to extend (or not to terminate) the lease that the Company is reasonably certain to exercise, or an option to extend (or not to terminate) the lease controlled by the lessor. Lease payments included in the measurement of the lease liability comprise fixed payments or variable lease payments. The variable lease payments take into account annual changes in the consumer price index and common area maintenance charges, if known. ROU assets for operating and finance leases are periodically reviewed for impairment losses. The Company uses the long-lived asset impairment guidance in ASC Subtopic 360-10, Property, Plant, and Equipment – Overall, to determine whether an ROU asset is impaired, and if so, the amount of the impairment loss to recognize. The Company did not recognize an impairment charge for any The Company monitors for events or changes in circumstances that require a reassessment of one of its leases. When a reassessment results in the remeasurement of a lease liability, a corresponding adjustment is made to the carrying amount of the corresponding ROU asset. The Company did not recognize any significant remeasurements during the years ended December 31, 2022, 2021 and 2020. The Company has elected not to recognize ROU assets and lease liabilities for short-term leases that have a lease term of less than 12 months. The Company has elected to apply the short-term lease recognition and measurement exemption allowed for in the lease accounting standard. The Company recognizes the lease payments associated with its short-term leases as an expense on a straight-line basis over the lease term. The Company initially entered into finance leases in December 2020 and the assets under these leases went into service on December 31, 2020. Lease cost for operating and finance leases for the years ended December 31, 2022, 2021 and 2020 were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ ​ 2022 ​ 2021 ​ 2020 Operating lease cost ​ $ 41,891 ​ $ 40,381 ​ $ 39,411 Finance lease cost: ​ ​ ​ ​ ​ ​ ​ ​ ​ Amortization of leased assets ​ ​ 2,484 ​ ​ 3,424 ​ ​ — Interest on leased liabilities ​ ​ 219 ​ ​ 152 ​ ​ — Total lease cost ​ $ 44,594 ​ $ 43,957 ​ $ 39,411 ​ Supplemental cash flow information and non-cash activity related to the Company’s leases are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ ​ 2022 ​ ​ 2021 ​ ​ 2020 Cash paid for amounts included in the measurement of lease liabilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ Operating cash flows from operating leases ​ $ 40,782 ​ $ 40,249 ​ $ 39,212 Operating cash flows from finance leases ​ $ 219 ​ $ 152 ​ $ — Financing cash flows from finance leases ​ $ 5,560 ​ $ 3,133 ​ $ — Non-cash activity: ​ ​ ​ ​ ​ ​ ​ ​ ​ Right-of-use assets obtained in exchange for lease liabilities - operating leases ​ $ 63,648 ​ $ 17,933 ​ $ 15,117 Right-of-use assets obtained in exchange for lease liabilities - finance leases ​ $ 3,369 ​ $ 10,012 ​ $ 3,754 ​ Weighted-average remaining lease term and discount rate for the Company’s leases are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ 2022 ​ 2021 ​ 2020 Weighted average remaining lease term - operating leases ​ 8.9 years 8.0 years 8.6 years Weighted average remaining lease term - finance leases ​ 4.2 years ​ 4.9 years ​ 5.4 years Weighted average discount rate - operating leases ​ 2.93 % 3.37 % 3.86 % Weighted average discount rate - finance leases ​ 1.96 % ​ 1.89 % ​ 1.89 % ​ As of December 31, 2022, future minimum lease payments, reconciled to the respective lease liabilities, are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Operating Leases ​ ​ Finance Leases 2023 $ 40,499 ​ $ 2,906 2024 ​ 32,521 ​ 2,905 2025 ​ 26,869 ​ 2,905 2026 ​ 22,317 ​ 2,320 2027 ​ 19,528 ​ 898 Thereafter ​ 89,050 ​ — Minimum lease payments ​ 230,784 ​ 11,934 Less: imputed interest ​ (30,152) ​ (470) Present value of minimum lease payments ​ ​ 200,632 ​ ​ 11,464 Less: current portion of lease liabilities ​ ​ (35,170) ​ ​ (2,695) Long-term portion of lease liabilities ​ $ 165,462 ​ $ 8,769 ​

Long-Term Debt

Long-Term Debt	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Long-Term Debt	9. The following table presents the Company’s long-term debt at March 31, 2023 and December 31, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, ​ December 31, ​ ​ 2023 2022 Revolver under Credit Agreement, bearing interest ranging from 5.77% to 5.92% (a) ​ $ 650,587 ​ $ 614,705 ​ Term loan under Credit Agreement, bearing interest at 5.77% (a) ​ 650,000 ​ 650,000 ​ Term loan under Term Loan Agreement, bearing interest at 5.78% (a) ​ ​ 800,000 ​ ​ 800,000 ​ 4.25% Senior Notes due 2028 ​ ​ 500,000 ​ ​ 500,000 ​ 3.50% Senior Notes due 2029 ​ ​ 500,000 ​ ​ 500,000 ​ 2.60% Senior Notes due 2030 ​ ​ 600,000 ​ ​ 600,000 ​ 2.20% Senior Notes due 2032 ​ ​ 650,000 ​ ​ 650,000 ​ 3.20% Senior Notes due 2032 ​ ​ 500,000 ​ ​ 500,000 ​ 4.20% Senior Notes due 2033 ​ ​ 750,000 ​ ​ 750,000 ​ 3.05% Senior Notes due 2050 ​ ​ 500,000 ​ ​ 500,000 ​ 2.95% Senior Notes due 2052 ​ ​ 850,000 ​ ​ 850,000 ​ Notes payable to sellers and other third parties, bearing interest ranging from 2.42% to 10.35%, principal and interest payments due periodically with due dates ranging from 2024 to 2036 (a) ​ 36,049 ​ 37,232 ​ Finance leases, bearing interest ranging from 1.89% to 2.16%, with lease expiration dates ranging from 2026 to 2027 (a) ​ ​ 10,791 ​ ​ 11,464 ​ ​ ​ 6,997,427 ​ 6,963,401 ​ Less – current portion ​ (10,513) ​ (6,759) ​ Less – unamortized debt discount and issuance costs ​ (65,075) ​ (66,493) ​ Long-term portion of debt and notes payable ​ $ 6,921,839 ​ $ 6,890,149 ​ ____________________ (a) Interest rates represent the interest rates at March 31, 2023. ​ Credit Agreement Details of the Credit Agreement are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, ​ December 31, ​ ​ 2023 2022 Revolver under Credit Agreement ​ ​ ​ Available ​ $ 1,159,902 ​ $ 1,193,502 ​ ​ Letters of credit outstanding ​ $ 39,511 ​ $ 41,793 ​ ​ Total amount drawn, as follows: ​ $ 650,587 ​ $ 614,705 ​ ​ Amount drawn – U.S. Term SOFR rate loan ​ $ 280,000 ​ $ 391,000 ​ ​ Interest rate applicable – U.S. Term SOFR rate loan ​ ​ 5.77 % ​ 5.42 % ​ Amount drawn – U.S. Term SOFR rate loan ​ $ 100,000 ​ $ — ​ ​ Interest rate applicable – U.S. Term SOFR rate loan ​ ​ 5.78 % ​ — % ​ Amount drawn – U.S. Term SOFR rate loan ​ $ 60,000 ​ $ — ​ ​ Interest rate applicable – U.S. Term SOFR rate loan ​ ​ 5.91 % ​ — % ​ Amount drawn – Canadian bankers’ acceptance ​ $ 210,587 ​ $ 223,705 ​ ​ Interest rate applicable – Canadian bankers’ acceptance ​ 5.92 % 5.74 % ​ Commitment – rate applicable ​ 0.09 % 0.09 % ​ Term loan under Credit Agreement ​ ​ ​ ​ ​ ​ Amount drawn – U.S. Term SOFR rate loan ​ $ 650,000 ​ $ 650,000 ​ ​ Interest rate applicable – U.S. Term SOFR rate loan ​ ​ 5.77 % ​ 5.42 % ​ ​ ​ In addition to the $39,511 of letters of credit at March 31, 2023 issued and outstanding under the Credit Agreement, the Company has issued and outstanding letters of credit totaling $85,120 under facilities other than the Credit Agreement.	11. LONG-TERM DEBT The following table presents the Company’s long-term debt as of December 31, 2022 and 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ December 31, ​ ​ 2022 2021 Revolver under Credit Agreement, bearing interest ranging from 5.42% to 5.74% (a) ​ $ 614,705 ​ $ 803,944 ​ Term loan under Credit Agreement, bearing interest at 5.42% (a) ​ 650,000 ​ 650,000 ​ Term loan under Term Loan Agreement, bearing interest at 5.42% (a), (b) ​ ​ 800,000 ​ ​ — ​ 4.25% Senior Notes due 2028 ​ ​ 500,000 ​ ​ 500,000 ​ 3.50% Senior Notes due 2029 ​ ​ 500,000 ​ ​ 500,000 ​ 2.60% Senior Notes due 2030 ​ ​ 600,000 ​ ​ 600,000 ​ 2.20% Senior Notes due 2032 ​ ​ 650,000 ​ ​ 650,000 ​ 3.20% Senior Notes due 2032 ​ ​ 500,000 ​ ​ — ​ 4.20% Senior Notes due 2033 ​ ​ 750,000 ​ ​ — ​ 3.05% Senior Notes due 2050 ​ ​ 500,000 ​ ​ 500,000 ​ 2.95% Senior Notes due 2052 ​ ​ 850,000 ​ ​ 850,000 ​ Notes payable to sellers and other third parties, bearing interest ranging from 2.42% to 10.35%, principal and interest payments due periodically with due dates ranging from 2024 to 2036 (a) ​ 37,232 ​ 37,508 ​ Finance leases, bearing interest ranging from 1.89% to 2.16%, with lease expiration dates ranging from 2026 to 2027 (a) ​ ​ 11,464 ​ ​ 10,519 ​ ​ ​ 6,963,401 ​ 5,101,971 ​ Less – current portion ​ (6,759) ​ (6,020) ​ Less – unamortized debt discount and issuance costs ​ (66,493) ​ (55,451) ​ ​ ​ $ 6,890,149 ​ $ 5,040,500 ​ (a) Interest rates represent the interest rates incurred at December 31, 2022. (b) Interest rate margin for term loan under Term Loan Agreement was 1.00% at December 31, 2022. Credit Agreement The Company has a revolving credit and term loan agreement (as amended, restated, amended and restated, supplemented or otherwise modified from time to time, the “Credit Agreement”) with Bank of America, N.A., acting through its Canada Branch, as the global agent, the swing line lender and a letter of credit issuer, Bank of America, N.A., as the U.S. agent and a letter of credit issuer, the other lenders named therein (the “Lenders”) and any other financial institutions from time to time party thereto. The Credit Agreement has a scheduled maturity date of July 30, 2026, which may be extended further upon agreement by Lenders holding at least 50% of the commitments and credit extensions outstanding, with respect to their respective commitments and credit extensions outstanding. Any Lender that does not agree to an extension of the maturity date shall not be so extended with respect to their commitments and credit extensions. Details of the Credit Agreement are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2022 2021 Revolver under Credit Agreement ​ ​ ​ Available ​ $ 1,193,502 ​ $ 933,775 ​ Letters of credit outstanding ​ $ 41,793 ​ $ 112,281 ​ Total amount drawn, as follows: ​ $ 614,705 ​ $ 803,944 ​ Amount drawn – U.S. Term SOFR rate loan ​ $ 391,000 ​ ​ Not applicable ​ Interest rate applicable – U.S. Term SOFR rate loan ​ ​ 5.42 % ​ Not applicable ​ Interest rate margin – U.S. Term SOFR rate loan ​ ​ 1.00 % ​ Not applicable ​ Amount drawn – U.S. LIBOR rate loan ​ ​ Not applicable ​ $ 631,000 ​ Interest rate applicable – U.S. LIBOR rate loan ​ ​ Not applicable ​ ​ 1.10 % Interest rate margin – U.S. LIBOR rate loan ​ ​ Not applicable ​ ​ 1.00 % Amount drawn – U.S. base rate loan ​ $ — ​ $ 158,000 ​ Interest rate applicable – U.S. base rate loan ​ ​ — % ​ 3.25 % Interest rate margin – U.S. base rate loan ​ ​ — % ​ 0.00 % Amount drawn – U.S. swingline loan ​ $ — ​ $ 11,000 ​ Interest rate applicable – U.S. swingline loan ​ ​ — % ​ 3.25 % Interest rate margin – U.S. swingline loan ​ ​ — % ​ 0.00 % Amount drawn – Canadian bankers’ acceptance ​ $ 223,705 ​ $ 3,944 ​ Interest rate applicable – Canadian bankers’ acceptance ​ 5.74 % 1.45 % Interest rate acceptance fee – Canadian bankers’ acceptance ​ 1.00 % 1.00 % Commitment – rate applicable ​ 0.09 % 0.09 % Term loan under Credit Agreement ​ ​ ​ ​ ​ Amount drawn – U.S. Term SOFR rate loan ​ $ 650,000 ​ ​ Not applicable ​ Interest rate applicable – U.S. Term SOFR rate loan ​ ​ 5.42 % ​ Not applicable ​ Interest rate margin – U.S. Term SOFR rate loan ​ ​ 1.00 % ​ Not applicable ​ Amount drawn – U.S. based LIBOR loan ​ ​ Not applicable ​ $ 650,000 ​ Interest rate applicable – U.S. based LIBOR loan ​ ​ Not applicable ​ 1.10 % Interest rate margin – U.S. based LIBOR loan ​ ​ Not applicable ​ 1.20 % ​ In addition to the $41,793 of letters of credit at December 31, 2022 issued and outstanding under the Credit Agreement, the Company has issued and outstanding letters of credit totaling $85,319 under facilities other than the Credit Agreement. Pursuant to the terms and conditions of the Credit Agreement, the Lenders provide a $2,500,000 credit facility to the Company, consisting of (i) revolving advances up to an aggregate principal amount of $1,850,000 at any one time outstanding, and (ii) a term loan in an aggregate principal amount of $650,000. As part of the aggregate commitments under the revolving advances, the Credit Agreement provides for letters of credit to be issued at the request of the Company in an aggregate amount not to exceed $320,000 and for swing line loans to be issued at the request of the Company in an aggregate amount not to exceed the lesser of $100,000 and the aggregate commitments under the revolving advances. Both the letter of credit sublimit and the swing line sublimit are part of, and not in addition to, the aggregate commitments under the revolving advances. Subject to certain specified conditions and additional deliveries, the Company has the option to request increases in the aggregate commitments for revolving advances and one or more additional term loans, provided that (i) the aggregate principal amount of such requests does not exceed $500,000 and (ii) the aggregate principal amount of commitments and term loans under the credit facility does not exceed $3,000,000. As of December 31, 2022, there are no commitments by lenders for any such increases in aggregate principal amount of revolving advances or additional term loans described in the preceding sentence. The Company has $2,901 of debt issuance costs related to the revolver under the Credit Agreement recorded in Other assets, net in the Consolidated Balance Sheets at December 31, 2022, which are being amortized through the maturity date, or July 30, 2026. The Company is amortizing $8,674 of debt issuance costs related to the term loan under the Credit Agreement through the maturity date. Advances are available under the Credit Agreement in U.S. dollars and Canadian dollars. Prior to the effectiveness of the amendment to the Credit Agreement dated as of October 31, 2022 (the “First Amendment”), interest accrued on the term loan under the Credit Agreement at a rate based on London interbank rate for specified interest periods (“LIBOR”) or a base rate, at the Company’s option, plus an applicable margin. Following the effectiveness of the First Amendment, interest accrues on the term loan under the Credit Agreement at a rate based upon the secured overnight financing rate (“SOFR”) for specified interest periods (“Term SOFR”) (including for all Term SOFR loans, a credit spread adjustment of 0.10% for all applicable interest periods) or a base rate, at the Company’s option, plus an applicable margin. Interest accrues on revolving advances under the Credit Agreement, at the Company’s option, (i) (A) prior to the effectiveness of the First Amendment, at LIBOR, (B) following the effectiveness of the First Amendment, at Term SOFR or (C) a base rate for U.S. dollar borrowings, in each case plus an applicable margin, and (ii) at the Canadian prime rate for Canadian dollar borrowings, plus an applicable margin. Canadian dollar borrowings are also available by way of bankers’ acceptances or BA equivalent notes, subject to the payment of a drawing fee. Certain fees for letters of credit in US dollars and Canadian dollars are also based on the applicable margin. The applicable margin used in connection with interest rates and fees is based on the debt rating of the Company’s public non-credit-enhanced, senior unsecured long-term debt (the “Debt Rating”). The applicable margin for LIBOR loans (prior to the effectiveness of the First Amendment), Term SOFR loans (following the effectiveness of the First Amendment), drawing fees for bankers’ acceptances, BA equivalent notes and certain letter of credit fees ranges from 0.750% to 1.250%. The applicable margin for U.S. base rate loans, Canadian prime rate loans and swing line loans ranges from 0.00% to 0.250%. The Company will also pay a fee based on the Debt Rating on the actual daily unused amount of the aggregate revolving commitments, ranging from 0.065% to 0.150%.‎ The Credit Agreement contains customary benchmark replacement mechanics in connection with certain benchmark transition events, as well as customary mechanics with respect to the unavailability of a tenor of a then-current benchmark rate. The borrowings under the Credit Agreement are unsecured and there are no subsidiary guarantors under the Credit Agreement. Proceeds from borrowings under the Credit Agreement may be used (i) to finance acquisitions, dividends or other equity distributions permitted under the Credit Agreement and (ii) for capital expenditures, working capital, payment of certain transaction fees and expenses, letters of credit and any other lawful corporate purposes. The Credit Agreement contains customary representations, warranties, covenants and events of default, including, among others, a change of control event of default and limitations on the incurrence of indebtedness and liens, new lines of business, mergers, transactions with affiliates and burdensome agreements. During the continuance of an event of default, the Lenders may take a number of actions, including, among others, declaring the entire amount then outstanding under the Credit Agreement to be due and payable. The Credit Agreement includes a financial covenant limiting, as of the last day of each fiscal quarter, the ratio of (a) Consolidated Total Funded Debt (as defined in the Credit Agreement) as of such date to (b) Consolidated EBITDA (as defined in the Credit Agreement), measured for the preceding 12 months, to not more than 3.75 to 1.00 (or 4.25 to 1.00 during material acquisition periods, subject to certain limitations). As of December 31, 2022 and 2021, the Company was in compliance with all applicable covenants in the Credit Agreement as in effect as of the applicable date. Term Loan Agreement On October 31, 2022, the Company, as borrower, Bank of America, N.A., as administrative agent, and the other lenders from time to time party thereto (the “New TL Lenders”) entered into that certain Term Loan Agreement (as amended, restated, supplemented or otherwise modified from time to time, the “Term Loan Agreement”), pursuant to which the New TL Lenders made loans to the Company in an aggregate stated principal amount of $800,000. The Company used substantially all of the proceeds of borrowings under the Term Loan Agreement to repay revolving borrowings under the Credit Agreement. Amounts borrowed under the Term Loan Agreement and repaid or prepaid may not be reborrowed. The Company is amortizing $1,725 of debt issuance costs through the maturity date, or July 30, 2026. Interest accrues on the term loan under the Term Loan Agreement at Term SOFR (including for all Term SOFR loans, a credit spread adjustment of 0.10% for all applicable interest periods) or a base rate, at the Company’s option, plus an applicable margin. The applicable margin used in connection with calculating interest rates and fees is based on the Company’s Debt Rating. The applicable margin for Term SOFR loans ranges from 0.750% to 1.250% per annum, and the applicable margin for base rate loans ranges from 0.00% to 0.250% per annum. The Term Loan Agreement contains customary benchmark replacement mechanics in connection with certain benchmark transition events, as well as customary mechanics with respect to the unavailability of a tenor of a then-current benchmark rate. The borrowings under the Term Loan Agreement are unsecured and there are no subsidiary guarantors under the Term Loan Agreement. The Term Loan Agreement contains customary representations, warranties, covenants and events of default, including, among others, a change of control event of default and limitations on the incurrence of indebtedness and liens, new lines of business, mergers, transactions with affiliates and burdensome agreements. During the continuance of an event of default, the New TL Lenders may take a number of actions, including, among others, declaring the entire amount then outstanding under the Term Loan Agreement and related loan documents to be due and payable. The Term Loan Agreement includes a financial covenant limiting, as of the last day of each fiscal quarter, the ratio of (i) Consolidated Total Funded Debt (as defined in the Term Loan Agreement) as of such date to (b) Consolidated EBITDA (as defined in the Term Loan Agreement), measured for the preceding 12 months, to not more than 3.75 to 1.00 (or 4.25 to 1.00 during material acquisition periods, subject to certain limitations). As of December 31, 2022, the Company was in compliance with all applicable covenants in the Term Loan Agreement. Private Placement Notes Pursuant to the terms and conditions of a Master Note Purchase Agreement dated as of June 1, 2016 (as amended, restated, amended and restated, supplemented or otherwise modified from time to time, the “2016 NPA”) between the Company and certain accredited institutional investors, the Company issued senior unsecured notes (the “2016 Private Placement Notes”) consisting of (i) $150,000 of senior notes due June 1, 2021 (the “June 2021 Private Placement Notes”), (ii) $200,000 of senior notes due June 1, 2023, (iii) $150,000 of senior notes due April 20, 2024, (iv) $400,000 of senior notes due June 1, 2026 and (v) $250,000 of senior notes due April 20, 2027. Pursuant to the terms and conditions of a Master Note Purchase Agreement, dated as of July 15, 2008 (as amended, restated, amended and restated, assumed, supplemented or otherwise modified from time to time, the “2008 NPA”) between the Company and certain accredited institutional investors, the Company issued senior unsecured notes (the “2008 Private Placement Notes” and together with the 2016 Private Placement Notes, the “Private Placement Notes”) consisting of (i) $100,000 of senior notes due April 1, 2021 (the “April 2021 Private Placement Notes” and together with the June 2021 Private Placement Notes, the “2021 Private Placement Notes”), (ii) $125,000 of senior notes due August 20, 2022 and (iii) $375,000 of senior notes due August 20, 2025. The Company repaid at maturity the 2021 Private Placement Notes and repaid the other Private Placement Notes in connection with the Offering (defined below) in September 2021. Senior Notes On November 16, 2018, the Company completed an underwritten public offering of $500,000 aggregate principal amount of its 4.25% Senior Notes due December 1, 2028 (the “2028 Senior Notes”). The 2028 Senior Notes were issued under the Indenture, dated as of November 16, 2018 (as amended, restated, amended and restated, supplemented or otherwise modified from time to time, the “Indenture”), by and between the Company and U.S. Bank National Association, as trustee (the “Trustee”), as supplemented through the First Supplemental Indenture, dated as of November 16, 2018. The Company is amortizing $5,792 of debt issuance costs through the maturity date of the 2028 Senior Notes. The Company may redeem some or all of the 2028 Senior Notes at its option prior to September 1, 2028 (three months before the maturity date) at any time and from time to time at a redemption price equal to the greater of 100% of the principal amount of the 2028 Senior Notes redeemed, or the sum of the present values of the remaining scheduled payments of principal and interest on the 2028 Senior Notes redeemed, plus accrued and unpaid interest to, but excluding, the redemption date. Commencing on September 1, 2028 (three months before the maturity date), the Company may redeem some or all of the 2028 Senior Notes, at any time and from time to time, at a redemption price equal to the principal amount of the 2028 Senior Notes being redeemed plus accrued and unpaid interest to, but excluding, the redemption date. On April 16, 2019, the Company completed an underwritten public offering of $500,000 aggregate principal amount of its 3.50% Senior Notes due May 1, 2029 (the “2029 Senior Notes”). The 2029 Senior Notes were issued under the Indenture, as supplemented through the Second Supplemental Indenture, dated as of April 16, 2019. The Company is amortizing $5,954 of debt issuance costs through the maturity date of the 2029 Senior Notes. The Company may redeem some or all of the 2029 Senior Notes at its option prior to February 1, 2029 (three months before the maturity date) at any time and from time to time at a redemption price equal to the greater of 100% of the principal amount of the 2029 Senior Notes redeemed, or the sum of the present values of the remaining scheduled payments of principal and interest on the 2029 Senior Notes redeemed, plus accrued and unpaid interest to, but excluding, the redemption date. Commencing on February 1, 2029 (three months before the maturity date), the Company may redeem some or all of the 2029 Senior Notes, at any time and from time to time, at a redemption price equal to the principal amount of the 2029 Senior Notes being redeemed plus accrued and unpaid interest to, but excluding, the redemption date. On January 23, 2020, the Company completed an underwritten public offering of $600,000 aggregate principal amount of 2.60% Senior Notes due February 1, 2030 (the “2030 Senior Notes”). The 2030 Senior Notes were issued under the Indenture, as supplemented through the Third Supplemental Indenture, dated as of January 23, 2020. The Company is amortizing $5,435 of debt issuance costs through the maturity date of the 2030 Senior Notes. The Company may redeem some or all of the 2030 Senior Notes at its option prior to November 1, 2029 (three months before the maturity date) at any time and from time to time at a redemption price equal to the greater of 100% of the principal amount of the 2030 Senior Notes redeemed, or the sum of the present values of the remaining scheduled payments of principal and interest on the 2030 Senior Notes redeemed, plus accrued and unpaid interest to, but excluding, the redemption date. Commencing on November 1, 2029 (three months before the maturity date), the Company may redeem some or all of the 2030 Senior Notes, at any time and from time to time, at a redemption price equal to the principal amount of the 2030 Senior Notes being redeemed plus accrued and unpaid interest to, but excluding, the redemption date. On March 13, 2020, the Company completed an underwritten public offering of $500,000 aggregate principal amount of 3.05% Senior Notes due April 1, 2050 (the “2050 Senior Notes”). The 2050 Senior Notes were issued under the Indenture, as supplemented through the Fourth Supplemental Indenture, dated as of March 13, 2020. The Company is amortizing a $7,375 debt discount and $5,682 of debt issuance costs through the maturity date of the 2050 Senior Notes. The Company may redeem some or all of the 2050 Senior Notes at its option prior to October 1, 2049 (six months before the maturity date) at any time and from time to time at a redemption price equal to the greater of 100% of the principal amount of the 2050 Senior Notes redeemed, or the sum of the present values of the remaining scheduled payments of principal and interest on the 2050 Senior Notes redeemed, plus accrued and unpaid interest to, but excluding, the redemption date. Commencing on October 1, 2049 (six months before the maturity date), the Company may redeem some or all of the 2050 Senior Notes, at any time and from time to time, at a redemption price equal to the principal amount of the 2050 Senior Notes being redeemed plus accrued and unpaid interest to, but excluding, the redemption date. On September 20, 2021, the Company completed an underwritten public offering (the “Offering”) of $650,000 aggregate principal amount of 2.20% Senior Notes due January 15, 2032 (the “2032 Senior Notes”) and $850,000 aggregate principal amount of 2.95% Senior Notes due January 15, 2052 (the “2052 Senior Notes”). The 2032 Senior Notes and the 2052 Senior Notes were issued under the Indenture, as supplemented through the Fifth Supplemental Indenture, dated as of September 20, 2021. The Company is amortizing a $1,066 debt discount and $5,979 of debt issuance costs through the maturity date of the 2032 Senior Notes and a $12,742 debt discount and $9,732 of debt issuance costs through the maturity date of the 2052 Senior Notes. The Company may, prior to October 15, 2031 (three months before the maturity date), redeem some or all of the 2032 Senior Notes, at any time and from time to time, at a redemption price equal to the greater of 100% of the principal amount of the 2032 Senior Notes redeemed, or the sum of the present values of the remaining scheduled payments of principal and interest on the 2032 Senior Notes redeemed. Commencing on October 15, 2031 (three months before the maturity date), the Company may redeem some or all of the 2032 Senior Notes, at any time and from time to time, at a redemption price equal to the principal amount of the 2032 Senior Notes being redeemed plus accrued and unpaid interest to, but excluding, the redemption date. The Company may, prior to July 15, 2051 (six months before the maturity date), redeem some or all of the 2052 Senior Notes, at any time and from time to time, at a redemption price equal to the greater of 100% of the principal amount of the 2052 Senior Notes redeemed, or the sum of the present values of the remaining scheduled payments of principal and interest on the 2052 Senior Notes redeemed. Commencing on July 15, 2051 (six months before the maturity date), the Company may redeem some or all of the 2052 Senior Notes, at any time and from time to time, at a redemption price equal to the principal amount of the 2052 Senior Notes being redeemed plus accrued and unpaid interest to, but excluding, the redemption date. In connection with the Offering, the Company exercised its right to repay the $1,500,000 of Private Placement Notes then outstanding governed by the 2008 NPA and the 2016 NPA. The Company repaid the Private Placement Notes then outstanding, including the $110,617 make-whole premium, with the net proceeds from the Offering and borrowings under the revolving credit facility provided under its Credit Agreement. The Company recorded $115,288 to Loss on early extinguishment of debt during the year ended December 31, 2021 due to the repayment of the Private Placement Notes and associated make-whole premium and related fees. On March 9, 2022, the Company completed an underwritten public offering of $500,000 aggregate principal amount of its 3.20% Senior Notes due June 1, 2032 (the “New 2032 Senior Notes”). The New 2032 Senior Notes were issued under the Indenture, as supplemented through the Sixth Supplemental Indenture, dated as of March 9, 2022. The Company is amortizing $375 of debt discount and $4,668 of debt issuance costs through the maturity date of the New 2032 Senior Notes. The Company may redeem some or all of the New 2032 Senior Notes at its option prior to March 1, 2032 (three months before the maturity date) (the “New 2032 Senior Notes Par Call Date”), at any time and from time to time at a redemption price equal to the greater of 100% of the principal amount of the New 2032 Senior Notes redeemed, or the sum of the present values of the remaining scheduled payments of principal and interest on the New 2032 Senior Notes redeemed discounted to the redemption date (assuming the New 2032 Senior Notes matured on the New 2032 Senior Notes Par Call Date), plus, in either case, accrued and unpaid interest thereon to the redemption date. Commencing on March 1, 2032 (three months before the maturity date), the Company may redeem some or all of the New 2032 Senior Notes, at any time and from time to time, at a redemption price equal to the principal amount of the New 2032 Senior Notes being redeemed plus accrued and unpaid interest thereon to the redemption date. On August 18, 2022, the Company completed an underwritten public offering of $750,000 aggregate principal amount of its 4.20% Senior Notes due January 15, 2033 (the “2033 Senior Notes” and, together with the 2028 Senior Notes, the 2029 Senior Notes, the 2030 Senior Notes, the 2032 Senior Notes, the New 2032 Senior Notes, the 2050 Senior Notes and the 2052 Senior Notes, the “Senior Notes”). The 2033 Senior Notes were issued under the Indenture, as supplemented through the Seventh Supplemental Indenture, dated as of August 18, 2022. The Company is amortizing $2,040 of debt discount and $6,878 of debt issuance costs through the maturity date of the 2033 Senior Notes. The Company may redeem some or all of the 2033 Senior Notes at its option prior to October 15, 2032 (three months before the maturity date) (the “2033 Senior Notes Par Call Date”), at any time and from time to time at a redemption price equal to the greater of 100% of the principal amount of the 2033 Senior Notes redeemed, or the sum of the present values of the remaining scheduled payments of principal and interest on the 2033 Senior Notes redeemed discounted to the redemption date (assuming the 2033 Senior Notes matured on the 2033 Senior Notes Par Call Date), plus, in either case, accrued and unpaid interest thereon to the redemption date. Commencing on October 15, 2032 (three months before the maturity date), the Company may redeem some or all of the 2033 Senior Notes, at any time and from time to time, at a redemption price equal to the principal amount of the 2033 Senior Notes being redeemed plus accrued and unpaid interest thereon to the redemption date. The Company pays interest on the Senior Notes semi-annually in arrears. The Senior Notes are the Company’s senior unsecured obligations, ranking equally in right of payment with its existing and future unsubordinated debt and senior to any of its future subordinated debt. The Senior Notes are not guaranteed by any of the Company’s subsidiaries. Under certain circumstances, the Company may become obligated to pay additional amounts (the “Additional Amounts”) with respect to the Senior Notes to ensure that the net amounts received by each holder of the Senior Notes will not be less than the amount such holder would have received if withholding taxes or deductions were not incurred on a payment under or with respect to the Senior Notes. If such payment of Additional Amounts is a result of a change in the laws or regulations, including a change in any official position, the introduction of an official position or a holding by a court of competent jurisdiction, of any jurisdiction from or through which payment is made by or on behalf of the Senior Notes having power to tax, and the Company cannot avoid such payments of Additional Amounts through reasonable measures, then the Company may redeem the applicable series of the Senior Notes then outstanding at a redemption price equal to 100% of the principal amount thereof, plus accrued and unpaid interest, if any, to, but excluding, the redemption date (subject to the right of holders of record on the relevant record date to receive interest due on an interest payment date that is on or prior to the redemption date). If the Company experiences certain kinds of changes of control, each holder of the Senior Notes may require the Company to repurchase all or a portion of the Senior Notes for cash at a price equal to 101% of the aggregate principal amount of such Senior Notes, plus any accrued but unpaid interest, if any, to, but excluding, the date of repurchase. The covenants in the Indenture include limitations on liens, sale-leaseback transactions and mergers and sales of all or substantially all of the Company’s assets. The Indenture also includes customary events of default with respect to the Senior Notes. As of December 31, 2022 and 2021, the Company was in compliance with all applicable covenants in the Indenture as in effect on the applicable date. Upon an event of default, the principal of and accrued and unpaid interest on all the Senior Notes may be declared to be due and payable by the Trustee or the holders of not less than 25% in principal amount of the outstanding Senior Notes of the applicable series. Upon such a declaration, such principal and accrued interest on all of the applicable series of the Senior Notes will be due and payable immediately. In the case of an event of default resulting from certain events of bankruptcy, insolvency or reorganization, the principal (or such specified amount) of and accrued and unpaid interest, if any, on all outstanding series of the Senior Notes will become and be immediately due and payable without any declaration or other act on the part of the Trustee or any holder of the applicable series of the Senior Notes. Under certain As of December 31, 2022, aggregate contractual future principal payments by calendar year on long-term debt are due as follows: ​ ​ ​ ​ ​ 2023 $ 6,759 2024 ​ 10,636 2025 ​ 7,112 2026 ​ 2,071,152 2027 ​ 5,179 Thereafter ​ 4,862,563 ​ ​ $ 6,963,401 ​

Segment Reporting

Segment Reporting	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Segment Reporting [Abstract]
Segment Reporting	10. The Company’s revenues are generated from the collection, transfer, recycling and disposal of non-hazardous solid waste and the treatment, recovery and disposal of non-hazardous E&P waste. No single contract or customer accounted for more than 10% of the Company’s total revenues at the consolidated or reportable segment level during the periods presented. Effective April 1, 2023, the Company modified its organizational structure under new regional operating segments as the result of continued growth in its business. The Company now reports revenue and segment EBITDA based on the following six geographic solid waste operating segments: Southern, Western, Central, Eastern, Canada and MidSouth. A small number of operating locations have been reallocated from the Western segment to the Central segment, the previous Eastern segment has been bifurcated into two smaller geographies now referred to as the Eastern segment and MidSouth segment, and a small number of operating locations have been reallocated from the Southern segment to the MidSouth segment. The Company’s six geographic solid waste operating segments comprise its reportable segments. Each operating segment is responsible for managing several vertically integrated operations, which are comprised of districts. The segment information presented herein reflects the realignment of these regions. The Company’s Chief Operating Decision Maker evaluates operating segment profitability and determines resource allocations based on several factors, of which the primary financial measure is segment EBITDA. The Company defines segment EBITDA as earnings before interest, taxes, depreciation, amortization, impairments and other operating items, and other income (expense). Segment EBITDA is not a measure of operating income, operating performance or liquidity under GAAP and may not be comparable to similarly titled measures reported by other companies. The Company’s management uses segment EBITDA in the evaluation of segment operating performance as it is a profit measure that is generally within the control of the operating segments. A reconciliation of segment EBITDA to Income before income tax provision is included at the end of this Note 10. Summarized financial information concerning the Company’s reportable segments for the three months ended March 31, 2023 and 2022, is shown in the following tables: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ Intercompany Reported Segment March 31, 2023 ​ Revenue ​ Revenue (b) ​ Revenue ​ EBITDA (c) Southern ​ $ 451,000 ​ $ (51,107) ​ $ 399,893 ​ $ 121,914 Western ​ 444,796 ​ (48,957) ​ 395,839 ​ 110,689 Central ​ 383,525 ​ (43,540) ​ 339,985 ​ 115,756 Eastern ​ ​ 388,797 ​ ​ (59,669) ​ ​ 329,128 ​ ​ 73,275 Canada ​ 253,670 ​ (26,514) ​ 227,156 ​ 82,984 MidSouth ​ 251,085 ​ (42,583) ​ 208,502 ​ 57,731 Corporate (a) ​ — ​ — ​ — ​ (2,454) ​ ​ $ 2,172,873 ​ $ (272,370) ​ $ 1,900,503 ​ $ 559,895 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ Intercompany Reported Segment March 31, 2022 ​ Revenue ​ Revenue (b) ​ Revenue ​ EBITDA (c) Southern ​ $ 385,636 ​ $ (39,570) ​ $ 346,066 ​ $ 101,124 Western ​ 376,538 ​ (42,879) ​ 333,659 ​ 100,000 Central ​ 322,998 ​ (32,936) ​ 290,062 ​ 96,951 Eastern ​ ​ 315,967 ​ ​ (45,165) ​ ​ 270,802 ​ ​ 65,287 Canada ​ 240,215 ​ (25,508) ​ 214,707 ​ 84,844 MidSouth ​ 228,162 ​ (37,203) ​ 190,959 ​ 49,819 Corporate (a) ​ — ​ — ​ — ​ (4,702) ​ ​ $ 1,869,516 ​ $ (223,261) ​ $ 1,646,255 ​ $ 493,323 ____________________ (a) The majority of Corporate expenses are allocated to the six operating segments. Direct acquisition expenses, expenses associated with common shares held in the deferred compensation plan exchanged for other investment options and share-based compensation expenses associated with Progressive Waste share-based grants outstanding at June 1, 2016 that were continued by the Company are not allocated to the six operating segments and comprise the net EBITDA of the Company’s Corporate segment for the periods presented. (b) Intercompany revenues reflect each segment’s total intercompany sales, including intercompany sales within a segment and between segments. Transactions within and between segments are generally made on a basis intended to reflect the market value of the service. (c) For those items included in the determination of segment EBITDA, the accounting policies of the segments are the same as those described in the Company’s most recent Annual Report on Form 10-K. The following tables show changes in goodwill during the three months ended March 31, 2023 and 2022, by reportable segment: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Southern Western Central Eastern Canada MidSouth Total Balance as of December 31, 2022 ​ $ 1,547,894 ​ $ 732,335 ​ $ 1,003,470 ​ $ 1,189,111 ​ $ 1,684,670 ​ $ 744,817 ​ $ 6,902,297 Goodwill acquired ​ ​ — ​ ​ 30,703 ​ ​ 397 ​ 3,440 ​ ​ — ​ ​ 3,249 ​ 37,789 Goodwill acquisition adjustments ​ ​ (647) ​ ​ — ​ ​ — ​ ​ — ​ ​ (289) ​ ​ — ​ ​ (936) Impact of changes in foreign currency ​ — ​ — ​ — ​ — ​ 1,417 ​ — ​ 1,417 Balance as of March 31, 2023 ​ $ 1,547,247 ​ $ 763,038 ​ $ 1,003,867 ​ $ 1,192,551 ​ $ 1,685,798 ​ $ 748,066 ​ $ 6,940,567 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Southern Western Central Eastern Canada MidSouth Total Balance as of December 31, 2021 ​ $ 1,457,437 ​ $ 503,223 ​ $ 931,269 ​ $ 992,578 ​ $ 1,559,512 ​ $ 743,624 ​ $ 6,187,643 Goodwill acquired ​ ​ — ​ ​ — ​ ​ 2,794 ​ 85,866 ​ ​ 123,384 ​ — ​ 212,044 Goodwill acquisition adjustments ​ ​ — ​ ​ 2,652 ​ ​ — ​ ​ — ​ ​ — ​ ​ (95) ​ ​ 2,557 Impact of changes in foreign currency ​ — ​ — ​ — ​ — ​ ​ 25,519 ​ — ​ 25,519 Balance as of March 31, 2022 ​ $ 1,457,437 ​ $ 505,875 ​ $ 934,063 ​ $ 1,078,444 ​ $ 1,708,415 ​ $ 743,529 ​ $ 6,427,763 ​ A reconciliation of the Company’s primary measure of segment profitability (segment EBITDA) to Income before income tax provision in the Condensed Consolidated Statements of Net Income is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ March 31, ​ 2023 2022 Southern segment EBITDA ​ $ 121,914 ​ $ 101,124 Western segment EBITDA ​ ​ 110,689 ​ ​ 100,000 Central segment EBITDA ​ ​ 115,756 ​ ​ 96,951 Eastern segment EBITDA ​ ​ 73,275 ​ ​ 65,287 Canada segment EBITDA ​ ​ 82,984 ​ ​ 84,844 MidSouth segment EBITDA ​ 57,731 ​ 49,819 Subtotal reportable segments ​ 562,349 ​ 498,025 Unallocated corporate overhead ​ ​ (2,454) ​ ​ (4,702) Depreciation ​ ​ (204,059) ​ ​ (179,950) Amortization of intangibles ​ ​ (39,282) ​ ​ (37,635) Impairments and other operating items ​ ​ (1,865) ​ ​ (1,878) Interest expense ​ ​ (68,353) ​ ​ (41,324) Interest income ​ ​ 2,715 ​ ​ 137 Other income (expense), net ​ ​ 3,174 ​ ​ (3,466) Income before income tax provision ​ $ 252,225 ​ $ 229,207 ​	17. SEGMENT REPORTING The Company’s revenues are generated from the collection, transfer, recycling and disposal of non-hazardous solid waste and the treatment, recovery and disposal of non-hazardous E&P waste. No single contract or customer accounted for more than 10% of the Company’s total revenues at the consolidated or reportable segment level during the periods presented. Effective April 1, 2023, the Company modified its organizational structure under new regional operating segments as the result of continued growth in its business. The Company now reports revenue and segment EBITDA based on the following six geographic solid waste operating segments: Southern, Western, Central, Eastern, Canada and MidSouth. A small number of operating locations have been reallocated from the Western segment to the Central segment, the previous Eastern segment has been bifurcated into two smaller geographies now referred to as the Eastern segment and MidSouth segment, and a small number of operating locations have been reallocated from the Southern segment to the MidSouth segment. The Company’s six geographic solid waste operating segments comprise its reportable segments. Each operating segment is responsible for managing several vertically integrated operations, which are comprised of districts. The segment information presented herein reflects the realignment of these regions. The Company’s Chief Operating Decision Maker evaluates operating segment profitability and determines resource allocations based on several factors, of which the primary financial measure is segment EBITDA. The Company defines segment EBITDA as earnings before interest, taxes, depreciation, amortization, impairments and other operating items, other income (expense) and loss on early extinguishment of debt. Segment EBITDA is not a measure of operating income, operating performance or liquidity under GAAP and may not be comparable to similarly titled measures reported by other companies. The Company’s management uses segment EBITDA in the evaluation of segment operating performance as it is a profit measure that is generally within the control of the operating segments. A reconciliation of segment EBITDA to Income before income tax provision is included at the end of this Note 17. Summarized financial information concerning the Company’s reportable segments for the years ended December 31, 2022, 2021 and 2020, is shown in the following tables: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended ​ ​ ​ ​ Intercompany ​ Reported ​ Segment ​ Depreciation and ​ Capital ​ ​ ​ December 31, 2022 Revenue Revenue (b) Revenue EBITDA (c) Amortization Expenditures Total Assets (e) Southern ​ $ 1,670,864 ​ $ (176,425) ​ $ 1,494,439 ​ $ 466,519 ​ $ 175,614 ​ $ 151,093 ​ $ 3,410,888 Western ​ 1,605,574 ​ (177,543) ​ 1,428,031 ​ 424,935 ​ 155,882 ​ 232,714 ​ 3,239,679 Central ​ 1,447,703 ​ (159,355) ​ 1,288,348 ​ 446,315 ​ 156,895 ​ 181,065 ​ 2,803,853 Eastern ​ ​ 1,445,193 ​ ​ (211,498) ​ ​ 1,233,695 ​ ​ 281,522 ​ ​ 190,480 ​ ​ 138,028 ​ ​ 2,752,436 Canada ​ 1,047,672 ​ (107,048) ​ 940,624 ​ 349,403 ​ 118,388 ​ 70,051 ​ 2,773,882 MidSouth ​ 992,922 ​ (166,200) ​ 826,722 ​ 235,705 ​ 112,866 ​ 133,849 ​ 1,727,323 Corporate (a), (d) ​ — ​ — ​ — ​ (25,019) ​ 8,835 ​ 5,877 ​ 426,542 ​ ​ $ 8,209,928 ​ $ (998,069) ​ $ 7,211,859 ​ $ 2,179,380 ​ $ 918,960 ​ $ 912,677 ​ $ 17,134,603 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended ​ ​ ​ ​ Intercompany ​ Reported ​ Segment ​ Depreciation and ​ Capital ​ ​ ​ December 31, 2021 Revenue Revenue (b) Revenue EBITDA (c) Amortization Expenditures Total Assets (e) Southern ​ $ 1,493,588 ​ $ (172,526) ​ $ 1,321,062 ​ $ 369,221 ​ $ 173,235 ​ $ 139,258 ​ $ 3,154,940 Western ​ 1,383,124 ​ (154,498) ​ 1,228,626 ​ 386,513 ​ 126,192 ​ 147,556 ​ 2,168,804 Central ​ 1,243,666 ​ (142,261) ​ 1,101,405 ​ 379,644 ​ 138,683 ​ 149,360 ​ 2,429,811 Eastern ​ 1,111,546 ​ ​ (155,836) ​ ​ 955,710 ​ ​ 245,091 ​ ​ 156,499 ​ ​ 90,212 ​ ​ 2,314,663 Canada ​ 965,705 ​ (108,982) ​ 856,723 ​ 339,859 ​ 111,458 ​ 68,183 ​ 2,513,608 MidSouth ​ 832,386 ​ (144,551) ​ ​ 687,835 ​ ​ 184,218 ​ 97,564 ​ 101,098 ​ 1,690,234 Corporate (a), (d) ​ — ​ — ​ — ​ (19,596) ​ 9,378 ​ 48,648 ​ 427,864 ​ ​ $ 7,030,015 ​ $ (878,654) ​ $ 6,151,361 ​ $ 1,884,950 ​ $ 813,009 ​ $ 744,315 ​ $ 14,699,924 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended ​ ​ ​ ​ Intercompany ​ Reported ​ Segment ​ Depreciation and ​ Capital ​ ​ ​ December 31, 2020 Revenue Revenue (b) Revenue EBITDA (c) Amortization Expenditures Total Assets (e) Southern ​ $ 1,419,987 ​ $ (169,817) ​ $ 1,250,170 ​ $ 343,181 ​ $ 173,885 ​ $ 125,972 ​ $ 3,193,211 Western ​ 1,244,745 ​ (141,993) ​ 1,102,752 ​ 346,585 ​ 111,515 ​ 126,370 ​ 1,770,403 Central ​ 1,058,909 ​ (127,885) ​ 931,024 ​ 332,321 ​ 117,499 ​ 109,013 ​ 2,256,992 Eastern ​ 969,011 ​ ​ (142,927) ​ ​ 826,084 ​ ​ 196,068 ​ ​ 143,744 ​ ​ 111,912 ​ ​ 1,908,333 Canada ​ 805,757 ​ (95,297) ​ 710,460 ​ 256,119 ​ 103,334 ​ 109,886 ​ 2,544,379 MidSouth ​ 761,978 ​ (136,478) ​ ​ 625,500 ​ ​ 172,559 ​ 94,172 ​ 75,661 ​ 1,428,929 Corporate (a), (d) ​ — ​ — ​ — ​ (15,283) ​ 8,255 ​ 5,747 ​ 890,117 ​ ​ $ 6,260,387 ​ $ (814,397) ​ $ 5,445,990 ​ $ 1,631,550 ​ $ 752,404 ​ $ 664,561 ​ $ 13,992,364 (a) The majority of Corporate expenses are allocated to the six operating segments. Direct acquisition expenses, expenses associated with common shares held in the deferred compensation plan exchanged for other investment options and share-based compensation expenses associated with Progressive Waste share-based grants outstanding at June 1, 2016 that were continued by the Company are not allocated to the six operating segments and comprise the net EBITDA of the Company’s Corporate segment for the periods presented. (b) Intercompany revenues reflect each segment’s total intercompany sales, including intercompany sales within a segment and between segments. Transactions within and between segments are generally made on a basis intended to reflect the market value of the service. (c) For those items included in the determination of segment EBITDA, the accounting policies of the segments are the same as those described in Note 3. (d) Corporate assets include cash, debt issuance costs, equity investments, operating lease right-of-use assets and corporate facility leasehold improvements and equipment. (e) Goodwill is included within total assets for each of the Company’s six operating segments. The following table shows changes in goodwill during the years ended December 31, 2021 and 2022, by reportable segment: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Southern Western Central Eastern Canada MidSouth Total Balance as of December 31, 2020 ​ $ 1,532,215 ​ $ 442,862 ​ $ 824,204 ​ $ 1,374,577 ​ $ 1,552,792 ​ $ — ​ $ 5,726,650 Goodwill transferred (a) ​ ​ (77,430) ​ ​ (36,486) ​ ​ 39,037 ​ ​ (557,353) ​ ​ — ​ ​ 632,232 ​ ​ — Goodwill acquired ​ 2,976 ​ 96,847 ​ 68,028 ​ 175,354 ​ — ​ 111,392 ​ 454,597 Goodwill acquisition adjustments ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ (2) ​ ​ — ​ ​ (2) Goodwill divested ​ ​ (324) ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ (324) Impact of changes in foreign currency ​ — ​ — ​ — ​ — ​ 6,722 ​ — ​ 6,722 Balance as of December 31, 2021 ​ ​ 1,457,437 ​ ​ 503,223 ​ ​ 931,269 ​ ​ 992,578 ​ ​ 1,559,512 ​ ​ 743,624 ​ ​ 6,187,643 Goodwill acquired ​ ​ 90,457 ​ ​ 229,112 ​ ​ 72,201 ​ 196,533 ​ ​ 235,095 ​ ​ 1,193 ​ 824,591 Impact of changes in foreign currency ​ — ​ — ​ — ​ — ​ (109,937) ​ — ​ (109,937) Balance as of December 31, 2022 ​ $ 1,547,894 ​ $ 732,335 ​ $ 1,003,470 ​ $ 1,189,111 ​ $ 1,684,670 ​ $ 744,817 ​ $ 6,902,297 (a) Effective April 1, 2023, the Company completed an evaluation of its organizational structure and, as a result of continued growth in the business, modified its organizational structure and changed its five geographic operating segments (Southern, Western, Central, Eastern and Canada) to six geographic operating segments (Southern, Western, Central, Eastern, Canada and MidSouth). Additionally, the Company realigned certain of the Company’s districts between operating segments. This realignment resulted in the reallocation of goodwill among its segments, which is reflected in the “Goodwill transferred” line item. Property and equipment, net relating to operations in the United States and Canada are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2022 2021 United States ​ $ 6,201,011 ​ $ 5,075,184 Canada ​ 749,904 ​ 646,765 Total ​ $ 6,950,915 ​ $ 5,721,949 ​ A reconciliation of the Company’s primary measure of segment profitability (segment EBITDA) to Income before income tax provision in the Consolidated Statements of Net Income is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years ended December 31, ​ 2022 2021 2020 Southern segment EBITDA ​ $ 466,519 ​ $ 369,221 ​ $ 343,181 Western segment EBITDA ​ 424,935 ​ 386,513 ​ 346,585 Central segment EBITDA ​ 446,315 ​ 379,644 ​ 332,321 Eastern segment EBITDA ​ ​ 281,522 ​ ​ 245,091 ​ ​ 196,068 Canada segment EBITDA ​ 349,403 ​ 339,859 ​ 256,119 MidSouth segment EBITDA ​ 235,705 ​ 184,218 ​ 172,559 Subtotal reportable segments ​ 2,204,399 ​ 1,904,546 ​ 1,646,833 Unallocated corporate overhead ​ (25,019) ​ (19,596) ​ (15,283) Depreciation ​ (763,285) ​ (673,730) ​ (621,102) Amortization of intangibles ​ (155,675) ​ (139,279) ​ (131,302) Impairments and other operating items ​ (18,230) ​ (32,316) ​ (466,718) Interest expense ​ (202,331) ​ (162,796) ​ (162,375) Interest income ​ 5,950 ​ 2,916 ​ 5,253 Other income (expense), net ​ 3,154 ​ 6,285 ​ (1,392) Loss on early extinguishment of debt ​ ​ — ​ ​ (115,288) ​ ​ — Income before income tax provision ​ $ 1,048,963 ​ $ 770,742 ​ $ 253,914 ​

Derivative Financial Instrument

Derivative Financial Instruments	3 Months Ended
	Mar. 31, 2023
Derivative Financial Instruments [Abstract]
Derivative Financial Instruments	11. The Company recognizes all derivatives on the Condensed Consolidated Balance Sheets at fair value. All of the Company’s derivatives have been designated as cash flow hedges; therefore, the gain or loss on the derivatives will be recognized in accumulated other comprehensive income (loss) (“AOCIL”) and reclassified into earnings in the same period during which the hedged transaction affects earnings and is presented in the same income statement line item as the earnings effect of the hedged item. The Company classifies cash inflows and outflows from derivatives within operating activities on the Condensed Consolidated Statements of Cash Flows. One of the Company’s objectives for utilizing derivative instruments is to reduce its exposure to fluctuations in cash flows due to changes in the variable interest rates of certain borrowings under the Credit Agreement. The Company’s strategy to achieve that objective involves entering into interest rate swaps. The interest rate swaps outstanding at March 31, 2023 were specifically designated to the Credit Agreement and accounted for as cash flow hedges. At March 31, 2023, the Company’s derivative instruments included four interest rate swap agreements as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fixed Variable ​ ​ ​ ​ Notional ​ Interest ​ Interest Rate ​ ​ ​ ​ Date Entered (a) ​ Amount ​ Rate Paid (b) ​ Received ​ Effective Date ​ Expiration Date August 2017 ​ $ 200,000 2.1230 % 1-month Term SOFR November 2022 October 2025 June 2018 ​ $ 200,000 2.8480 % 1-month Term SOFR November 2022 October 2025 June 2018 ​ $ 200,000 2.8284 % 1-month Term SOFR November 2022 October 2025 December 2018 ​ $ 200,000 2.7715 % 1-month Term SOFR November 2022 July 2027 ____________________ (a) In October 2022, the Company amended the reference rate in all of its outstanding interest rate swap contracts to replace One-Month LIBOR with One-Month Term SOFR and certain credit spread adjustments. The Company did not record any gains or losses upon the conversion of the reference rates in these interest rate swap contracts, and the Company believes these amendments will not have a material impact on its Condensed Consolidated Financial Statements. (b) Plus applicable margin. The fair values of derivative instruments designated as cash flow hedges at March 31, 2023, were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives Designated as Cash ​ Asset Derivatives ​ Liability Derivatives Flow Hedges Balance Sheet Location Fair Value Balance Sheet Location Fair Value Interest rate swaps Prepaid expenses and other current assets (a) ​ $ 14,872 Accrued liabilities ​ $ — ​ Other assets, net ​ 9,555 ​ ​ ​ ​ Total derivatives designated as cash flow hedges ​ ​ ​ $ 24,427 ​ ​ ​ $ — ____________________ (a) Represents the estimated amount of the existing unrealized gains on interest rate swaps at March 31, 2023 (based on the interest rate yield curve at that date), included in AOCIL expected to be reclassified into pre-tax earnings within the next 12 months. The actual amounts reclassified into earnings are dependent on future movements in interest rates. The fair values of derivative instruments designated as cash flow hedges at December 31, 2022, were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives Designated as Cash ​ Asset Derivatives ​ Liability Derivatives Flow Hedges Balance Sheet Location Fair Value Balance Sheet Location Fair Value Interest rate swaps Prepaid expenses and other current assets ​ $ 17,906 Accrued liabilities ​ $ — ​ Other assets, net ​ 13,901 ​ ​ ​ Total derivatives designated as cash flow hedges ​ ​ ​ $ 31,807 ​ ​ ​ $ — ​ The following table summarizes the impact of the Company’s cash flow hedges on the results of operations, comprehensive income (loss) and AOCIL for the three months ended March 31, 2023 and 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives ​ ​ ​ ​ ​ ​ ​ Statement of ​ Amount of (Gain) or Loss Reclassified Designated as Cash ​ Amount of Gain or (Loss) Recognized ​ Net Income ​ from AOCIL into Earnings, Flow Hedges ​ as AOCIL on Derivatives, Net of Tax (a) ​ Classification ​ Net of Tax (b) ​ ​ Three Months Ended ​ ​ ​ Three Months Ended ​ ​ March 31, ​ ​ ​ March 31, ​ 2023 2022 ​ 2023 2022 Interest rate swaps ​ $ (2,425) ​ $ 32,854 ​ Interest expense ​ $ (2,999) ​ $ 3,491 ​ ____________________ (a) In accordance with the derivatives and hedging guidance, the changes in fair values of interest rate swaps have been recorded in equity as a component of AOCIL. As the critical terms of the interest rate swaps match the underlying debt being hedged, all unrealized changes in fair value are recorded in AOCIL. (b) Amounts reclassified from AOCIL into earnings related to realized gains and losses on interest rate swaps are recognized when interest payments or receipts occur related to the swap contracts, which correspond to when interest payments are made on the Company’s hedged debt. See Note 15 for further discussion on the impact of the Company’s hedge accounting to its consolidated comprehensive income (loss) and AOCIL.

Fair Value of Financial Instrum

Fair Value of Financial Instruments	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Fair Value [Abstract]
Fair Value of Financial Instruments	14. The Company uses a three-tier fair value hierarchy to classify and disclose all assets and liabilities measured at fair value on a recurring basis in periods subsequent to their initial measurement. These tiers include: Level 1, defined as quoted market prices in active markets for identical assets or liabilities; Level 2, defined as inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, model-based valuation techniques for which all significant assumptions are observable in the market, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities; and Level 3, defined as unobservable inputs that are not corroborated by market data. The Company’s financial assets and liabilities recorded at fair value on a recurring basis include derivative instruments and restricted cash and investments. At March 31, 2023 and December 31, 2022, the Company’s derivative instruments included pay-fixed, receive-variable interest rate swaps. The Company’s interest rate swaps are recorded at their estimated fair values based on quotes received from financial institutions that trade these contracts. The Company verifies the reasonableness of these quotes using similar quotes from another financial institution as of each date for which financial statements are prepared. For the Company’s interest rate swaps, the Company also considers the Company’s creditworthiness in its determination of the fair value measurement of these instruments in a net liability position and the counterparties’ creditworthiness in its determination of the fair value measurement of these instruments in a net asset position. The Company’s restricted cash is valued at quoted market prices in active markets for identical assets, which the Company receives from the financial institutions that hold such investments on its behalf. The Company’s restricted cash measured at fair value is invested primarily in money market accounts, bank time deposits and U.S. government and agency securities. The Company’s restricted investments are valued at quoted market prices in active markets for similar assets, which the Company receives from the financial institutions that hold such investments on its behalf. The Company’s restricted investments measured at fair value are invested primarily in money market accounts, bank time deposits, U.S. government and agency securities and Canadian bankers’ acceptance notes. The Company’s assets and liabilities measured at fair value on a recurring basis at March 31, 2023 and December 31, 2022, were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurement at March 31, 2023 Using ​ ​ ​ Quoted Prices in Significant ​ ​ ​ ​ ​ ​ ​ Active Markets ​ Other ​ Significant ​ ​ ​ ​ ​ for Identical ​ Observable ​ Unobservable ​ ​ ​ ​ ​ Assets ​ Inputs ​ Inputs ​ ​ Total ​ (Level 1) ​ (Level 2) ​ (Level 3) Interest rate swap derivative instruments – net asset position ​ $ 24,427 ​ $ — ​ $ 24,427 ​ $ — Restricted cash ​ $ 106,625 ​ $ 106,625 ​ $ — ​ $ — Restricted investments ​ $ 72,784 ​ $ — ​ $ 72,784 ​ $ — Contingent consideration ​ $ (85,822) ​ $ — ​ $ — ​ $ (85,822) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurement at December 31, 2022 Using ​ ​ ​ Quoted Prices in Significant ​ ​ ​ ​ ​ ​ ​ Active Markets ​ Other ​ Significant ​ ​ ​ ​ ​ for Identical ​ Observable ​ Unobservable ​ ​ ​ ​ ​ Assets ​ Inputs ​ Inputs ​ ​ Total ​ (Level 1) ​ (Level 2) ​ (Level 3) Interest rate swap derivative instruments – net asset position ​ $ 31,807 ​ $ — ​ $ 31,807 ​ $ — Restricted cash ​ $ 102,727 ​ $ 102,727 ​ $ — ​ $ — Restricted investments ​ $ 66,402 ​ $ — ​ $ 66,402 ​ $ — Contingent consideration ​ $ (81,415) ​ $ — ​ $ — ​ $ (81,415) ​ The following table summarizes the changes in the fair value for Level 3 liabilities related to contingent consideration for the three months ended March 31, 2023 and 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 31, ​ ​ 2023 2022 Beginning balance ​ $ 81,415 ​ $ 94,308 ​ Contingent consideration recorded at acquisition date ​ 6,000 ​ 5,000 ​ Payment of contingent consideration recorded at acquisition date ​ (1,319) ​ (3,571) ​ Adjustments to contingent consideration ​ ​ (637) ​ (52) ​ Interest accretion expense ​ 363 ​ 353 ​ Ending balance ​ $ 85,822 ​ $ 96,038 ​ ​	12. FAIR VALUE OF FINANCIAL INSTRUMENTS The Company uses a three-tier fair value hierarchy to classify and disclose all assets and liabilities measured at fair value on a recurring basis in periods subsequent to their initial measurement. These tiers include: Level 1, defined as quoted market prices in active markets for identical assets or liabilities; Level 2, defined as inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, model-based valuation techniques for which all significant assumptions are observable in the market, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities; and Level 3, defined as unobservable inputs that are not corroborated by market data. The Company’s financial assets and liabilities recorded at fair value on a recurring basis include derivative instruments and restricted cash and investments. At December 31, 2022 and 2021, the Company’s derivative instruments included pay-fixed, receive-variable interest rate swaps. The Company’s interest rate swaps are recorded at their estimated fair values based on quotes received from financial institutions that trade these contracts. The Company verifies the reasonableness of these quotes using similar quotes from another financial institution as of each date for which financial statements are prepared. For the Company’s interest rate swaps, the Company also considers the Company’s creditworthiness in its determination of the fair value measurement of these instruments in a net liability position and the counterparties’ creditworthiness in its determination of the fair value measurement of these instruments in a net asset position. The Company’s restricted cash is valued at quoted market prices in active markets for identical assets, which the Company receives from the financial institutions that hold such investments on its behalf. The Company’s restricted cash measured at fair value is invested primarily in money market accounts, bank time deposits and U.S. government and agency securities. The Company’s restricted investments are valued at quoted market prices in active markets for similar assets, which the Company receives from the financial institutions that hold such investments on its behalf. The Company’s restricted investments measured at fair value are invested primarily in money market accounts, bank time deposits, U.S. government and agency securities and Canadian bankers’ acceptance notes. The Company’s assets and liabilities measured at fair value on a recurring basis at December 31, 2022 and 2021, were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurement at December 31, 2022 Using ​ ​ ​ Quoted Prices in Significant ​ ​ ​ ​ ​ ​ ​ Active Markets ​ Other ​ Significant ​ ​ ​ ​ ​ for Identical ​ Observable ​ Unobservable ​ ​ ​ ​ ​ Assets ​ Inputs ​ Inputs ​ ​ Total ​ (Level 1) ​ (Level 2) ​ (Level 3) Interest rate swap derivative instruments – net asset position ​ $ 31,807 ​ $ — ​ $ 31,807 ​ $ — Restricted cash ​ $ 102,727 ​ $ 102,727 ​ $ — ​ $ — Restricted investments ​ $ 66,402 ​ $ — ​ $ 66,402 ​ $ — Contingent consideration ​ $ (81,415) ​ $ — ​ $ — ​ $ (81,415) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurement at December 31, 2021 Using ​ ​ ​ Quoted Prices in Significant ​ ​ ​ ​ ​ ​ ​ Active Markets ​ Other ​ Significant ​ ​ ​ ​ ​ for Identical ​ Observable ​ Unobservable ​ ​ ​ ​ ​ Assets ​ Inputs ​ Inputs ​ ​ Total ​ (Level 1) ​ (Level 2) ​ (Level 3) Interest rate swap derivative instruments – net liability position ​ $ (51,081) ​ $ — ​ $ (51,081) ​ $ — Restricted cash ​ $ 72,174 ​ $ 72,174 ​ $ — ​ $ — Restricted investments ​ $ 58,797 ​ $ — ​ $ 58,797 ​ $ — Contingent consideration ​ $ (94,308) ​ $ — ​ $ — ​ $ (94,308) ​ See Note 3 – “Impairments of Property and Equipment and Finite-Lived Intangible Assets” regarding non-recurring fair value measurements. ​ The following table summarizes the changes in the fair value for Level 3 liabilities related to contingent consideration for the years ended December 31, 2022 and 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ 2022 2021 Beginning balance ​ $ 94,308 ​ $ 71,736 Contingent consideration recorded at acquisition date ​ 6,642 ​ 31,616 Payment of contingent consideration recorded at acquisition date ​ (16,911) ​ (12,934) Payment of contingent consideration recorded in earnings ​ (2,982) ​ (520) Adjustments to contingent consideration ​ ​ (1,030) ​ ​ 2,954 Interest accretion expense ​ 1,417 ​ 1,470 Foreign currency translation adjustment ​ (29) ​ (14) Ending balance ​ $ 81,415 ​ $ 94,308 ​
Fair Value of Financial Instruments (10-Q)	12. The Company’s financial instruments consist primarily of cash and equivalents, trade receivables, restricted cash and investments, trade payables, debt instruments, contingent consideration obligations and interest rate swaps. As of March 31, 2023 and December 31, 2022, the carrying values of cash and equivalents, trade receivables, restricted cash and investments, trade payables and contingent consideration are considered to be representative of their respective fair values. The carrying values of the Company’s debt instruments, excluding certain notes as listed in the table below, approximate their fair values as of March 31, 2023 and December 31, 2022, based on current borrowing rates, current remaining average life to maturity and borrower credit quality for similar types of borrowing arrangements, and are classified as Level 2 within the fair value hierarchy. The carrying values and fair values of the Company’s debt instruments where the carrying values do not approximate their fair values as of March 31, 2023 and December 31, 2022, are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Carrying Value at ​ Fair Value (a) at ​ ​ March 31, ​ December 31, ​ March 31, ​ December 31, ​ 2023 2022 2023 2022 4.25% Senior Notes due 2028 ​ $ 500,000 ​ $ 500,000 ​ $ 491,500 ​ $ 470,850 3.50% Senior Notes due 2029 ​ $ 500,000 ​ $ 500,000 ​ $ 466,350 ​ $ 457,650 2.60% Senior Notes due 2030 ​ $ 600,000 ​ $ 600,000 ​ $ 525,060 ​ $ 510,540 2.20% Senior Notes due 2032 ​ $ 650,000 ​ $ 650,000 ​ $ 529,490 ​ $ 514,540 3.20% Senior Notes due 2032 ​ $ 500,000 ​ $ 500,000 ​ $ 444,800 ​ $ 429,000 4.20% Senior Notes due 2033 ​ $ 750,000 ​ $ 750,000 ​ $ 718,275 ​ $ 699,450 3.05% Senior Notes due 2050 ​ $ 500,000 ​ $ 500,000 ​ $ 341,300 ​ $ 343,300 2.95% Senior Notes due 2052 ​ $ 850,000 ​ $ 850,000 ​ $ 570,435 ​ $ 561,425 ____________________ *Senior Notes are classified as Level 2 within the fair value hierarchy. Fair value inputs include third-party calculations of the market interest rate of notes with similar ratings in similar industries over the remaining note terms. For details on the fair value of the Company’s interest rate swaps, restricted cash and investments and contingent consideration, refer to Note 14.

Net Income Per Share Informatio

Net Income Per Share Information	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Net Income Per Share Information [Abstract]
Net Income Per Share Information	13. The following table sets forth the calculation of the numerator and denominator used in the computation of basic and diluted net income per common share attributable to the Company’s shareholders for the three months ended March 31, 2023 and 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ ​ March 31, ​ ​ 2023 2022 Numerator: ​ ​ ​ ​ ​ ​ ​ Net income attributable to Waste Connections for basic and diluted earnings per share ​ $ 197,813 ​ $ 180,324 ​ Denominator: ​ ​ ​ ​ ​ Basic shares outstanding ​ ​ 257,372,942 ​ ​ 258,946,933 ​ Dilutive effect of equity-based awards ​ ​ 616,029 ​ ​ 614,050 ​ Diluted shares outstanding ​ 257,988,971 ​ 259,560,983 ​ ​	18. NET INCOME PER SHARE INFORMATION The following table sets forth the calculation of the numerator and denominator used in the computation of basic and diluted net income per common share attributable to the Company’s shareholders for the years ended December 31, 2022, 2021 and 2020: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ 2022 2021 2020 Numerator: ​ ​ ​ ​ ​ ​ ​ ​ ​ Net income attributable to Waste Connections for basic and diluted earnings per share ​ $ 835,662 ​ $ 618,047 ​ $ 204,677 Denominator: ​ ​ ​ ​ ​ ​ Basic shares outstanding ​ 257,383,578 ​ 261,166,723 ​ 263,189,699 Dilutive effect of equity-based awards ​ 655,223 ​ 561,747 ​ 497,840 Diluted shares outstanding ​ 258,038,801 ​ 261,728,470 ​ 263,687,539 ​

Fair Value Measurements

Fair Value Measurements	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Fair Value [Abstract]
Fair Value of Financial Instruments	14. The Company uses a three-tier fair value hierarchy to classify and disclose all assets and liabilities measured at fair value on a recurring basis in periods subsequent to their initial measurement. These tiers include: Level 1, defined as quoted market prices in active markets for identical assets or liabilities; Level 2, defined as inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, model-based valuation techniques for which all significant assumptions are observable in the market, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities; and Level 3, defined as unobservable inputs that are not corroborated by market data. The Company’s financial assets and liabilities recorded at fair value on a recurring basis include derivative instruments and restricted cash and investments. At March 31, 2023 and December 31, 2022, the Company’s derivative instruments included pay-fixed, receive-variable interest rate swaps. The Company’s interest rate swaps are recorded at their estimated fair values based on quotes received from financial institutions that trade these contracts. The Company verifies the reasonableness of these quotes using similar quotes from another financial institution as of each date for which financial statements are prepared. For the Company’s interest rate swaps, the Company also considers the Company’s creditworthiness in its determination of the fair value measurement of these instruments in a net liability position and the counterparties’ creditworthiness in its determination of the fair value measurement of these instruments in a net asset position. The Company’s restricted cash is valued at quoted market prices in active markets for identical assets, which the Company receives from the financial institutions that hold such investments on its behalf. The Company’s restricted cash measured at fair value is invested primarily in money market accounts, bank time deposits and U.S. government and agency securities. The Company’s restricted investments are valued at quoted market prices in active markets for similar assets, which the Company receives from the financial institutions that hold such investments on its behalf. The Company’s restricted investments measured at fair value are invested primarily in money market accounts, bank time deposits, U.S. government and agency securities and Canadian bankers’ acceptance notes. The Company’s assets and liabilities measured at fair value on a recurring basis at March 31, 2023 and December 31, 2022, were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurement at March 31, 2023 Using ​ ​ ​ Quoted Prices in Significant ​ ​ ​ ​ ​ ​ ​ Active Markets ​ Other ​ Significant ​ ​ ​ ​ ​ for Identical ​ Observable ​ Unobservable ​ ​ ​ ​ ​ Assets ​ Inputs ​ Inputs ​ ​ Total ​ (Level 1) ​ (Level 2) ​ (Level 3) Interest rate swap derivative instruments – net asset position ​ $ 24,427 ​ $ — ​ $ 24,427 ​ $ — Restricted cash ​ $ 106,625 ​ $ 106,625 ​ $ — ​ $ — Restricted investments ​ $ 72,784 ​ $ — ​ $ 72,784 ​ $ — Contingent consideration ​ $ (85,822) ​ $ — ​ $ — ​ $ (85,822) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurement at December 31, 2022 Using ​ ​ ​ Quoted Prices in Significant ​ ​ ​ ​ ​ ​ ​ Active Markets ​ Other ​ Significant ​ ​ ​ ​ ​ for Identical ​ Observable ​ Unobservable ​ ​ ​ ​ ​ Assets ​ Inputs ​ Inputs ​ ​ Total ​ (Level 1) ​ (Level 2) ​ (Level 3) Interest rate swap derivative instruments – net asset position ​ $ 31,807 ​ $ — ​ $ 31,807 ​ $ — Restricted cash ​ $ 102,727 ​ $ 102,727 ​ $ — ​ $ — Restricted investments ​ $ 66,402 ​ $ — ​ $ 66,402 ​ $ — Contingent consideration ​ $ (81,415) ​ $ — ​ $ — ​ $ (81,415) ​ The following table summarizes the changes in the fair value for Level 3 liabilities related to contingent consideration for the three months ended March 31, 2023 and 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 31, ​ ​ 2023 2022 Beginning balance ​ $ 81,415 ​ $ 94,308 ​ Contingent consideration recorded at acquisition date ​ 6,000 ​ 5,000 ​ Payment of contingent consideration recorded at acquisition date ​ (1,319) ​ (3,571) ​ Adjustments to contingent consideration ​ ​ (637) ​ (52) ​ Interest accretion expense ​ 363 ​ 353 ​ Ending balance ​ $ 85,822 ​ $ 96,038 ​ ​	12. FAIR VALUE OF FINANCIAL INSTRUMENTS The Company uses a three-tier fair value hierarchy to classify and disclose all assets and liabilities measured at fair value on a recurring basis in periods subsequent to their initial measurement. These tiers include: Level 1, defined as quoted market prices in active markets for identical assets or liabilities; Level 2, defined as inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, model-based valuation techniques for which all significant assumptions are observable in the market, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities; and Level 3, defined as unobservable inputs that are not corroborated by market data. The Company’s financial assets and liabilities recorded at fair value on a recurring basis include derivative instruments and restricted cash and investments. At December 31, 2022 and 2021, the Company’s derivative instruments included pay-fixed, receive-variable interest rate swaps. The Company’s interest rate swaps are recorded at their estimated fair values based on quotes received from financial institutions that trade these contracts. The Company verifies the reasonableness of these quotes using similar quotes from another financial institution as of each date for which financial statements are prepared. For the Company’s interest rate swaps, the Company also considers the Company’s creditworthiness in its determination of the fair value measurement of these instruments in a net liability position and the counterparties’ creditworthiness in its determination of the fair value measurement of these instruments in a net asset position. The Company’s restricted cash is valued at quoted market prices in active markets for identical assets, which the Company receives from the financial institutions that hold such investments on its behalf. The Company’s restricted cash measured at fair value is invested primarily in money market accounts, bank time deposits and U.S. government and agency securities. The Company’s restricted investments are valued at quoted market prices in active markets for similar assets, which the Company receives from the financial institutions that hold such investments on its behalf. The Company’s restricted investments measured at fair value are invested primarily in money market accounts, bank time deposits, U.S. government and agency securities and Canadian bankers’ acceptance notes. The Company’s assets and liabilities measured at fair value on a recurring basis at December 31, 2022 and 2021, were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurement at December 31, 2022 Using ​ ​ ​ Quoted Prices in Significant ​ ​ ​ ​ ​ ​ ​ Active Markets ​ Other ​ Significant ​ ​ ​ ​ ​ for Identical ​ Observable ​ Unobservable ​ ​ ​ ​ ​ Assets ​ Inputs ​ Inputs ​ ​ Total ​ (Level 1) ​ (Level 2) ​ (Level 3) Interest rate swap derivative instruments – net asset position ​ $ 31,807 ​ $ — ​ $ 31,807 ​ $ — Restricted cash ​ $ 102,727 ​ $ 102,727 ​ $ — ​ $ — Restricted investments ​ $ 66,402 ​ $ — ​ $ 66,402 ​ $ — Contingent consideration ​ $ (81,415) ​ $ — ​ $ — ​ $ (81,415) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurement at December 31, 2021 Using ​ ​ ​ Quoted Prices in Significant ​ ​ ​ ​ ​ ​ ​ Active Markets ​ Other ​ Significant ​ ​ ​ ​ ​ for Identical ​ Observable ​ Unobservable ​ ​ ​ ​ ​ Assets ​ Inputs ​ Inputs ​ ​ Total ​ (Level 1) ​ (Level 2) ​ (Level 3) Interest rate swap derivative instruments – net liability position ​ $ (51,081) ​ $ — ​ $ (51,081) ​ $ — Restricted cash ​ $ 72,174 ​ $ 72,174 ​ $ — ​ $ — Restricted investments ​ $ 58,797 ​ $ — ​ $ 58,797 ​ $ — Contingent consideration ​ $ (94,308) ​ $ — ​ $ — ​ $ (94,308) ​ See Note 3 – “Impairments of Property and Equipment and Finite-Lived Intangible Assets” regarding non-recurring fair value measurements. ​ The following table summarizes the changes in the fair value for Level 3 liabilities related to contingent consideration for the years ended December 31, 2022 and 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ 2022 2021 Beginning balance ​ $ 94,308 ​ $ 71,736 Contingent consideration recorded at acquisition date ​ 6,642 ​ 31,616 Payment of contingent consideration recorded at acquisition date ​ (16,911) ​ (12,934) Payment of contingent consideration recorded in earnings ​ (2,982) ​ (520) Adjustments to contingent consideration ​ ​ (1,030) ​ ​ 2,954 Interest accretion expense ​ 1,417 ​ 1,470 Foreign currency translation adjustment ​ (29) ​ (14) Ending balance ​ $ 81,415 ​ $ 94,308 ​
Fair Value of Financial Instruments (10-Q)	12. The Company’s financial instruments consist primarily of cash and equivalents, trade receivables, restricted cash and investments, trade payables, debt instruments, contingent consideration obligations and interest rate swaps. As of March 31, 2023 and December 31, 2022, the carrying values of cash and equivalents, trade receivables, restricted cash and investments, trade payables and contingent consideration are considered to be representative of their respective fair values. The carrying values of the Company’s debt instruments, excluding certain notes as listed in the table below, approximate their fair values as of March 31, 2023 and December 31, 2022, based on current borrowing rates, current remaining average life to maturity and borrower credit quality for similar types of borrowing arrangements, and are classified as Level 2 within the fair value hierarchy. The carrying values and fair values of the Company’s debt instruments where the carrying values do not approximate their fair values as of March 31, 2023 and December 31, 2022, are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Carrying Value at ​ Fair Value (a) at ​ ​ March 31, ​ December 31, ​ March 31, ​ December 31, ​ 2023 2022 2023 2022 4.25% Senior Notes due 2028 ​ $ 500,000 ​ $ 500,000 ​ $ 491,500 ​ $ 470,850 3.50% Senior Notes due 2029 ​ $ 500,000 ​ $ 500,000 ​ $ 466,350 ​ $ 457,650 2.60% Senior Notes due 2030 ​ $ 600,000 ​ $ 600,000 ​ $ 525,060 ​ $ 510,540 2.20% Senior Notes due 2032 ​ $ 650,000 ​ $ 650,000 ​ $ 529,490 ​ $ 514,540 3.20% Senior Notes due 2032 ​ $ 500,000 ​ $ 500,000 ​ $ 444,800 ​ $ 429,000 4.20% Senior Notes due 2033 ​ $ 750,000 ​ $ 750,000 ​ $ 718,275 ​ $ 699,450 3.05% Senior Notes due 2050 ​ $ 500,000 ​ $ 500,000 ​ $ 341,300 ​ $ 343,300 2.95% Senior Notes due 2052 ​ $ 850,000 ​ $ 850,000 ​ $ 570,435 ​ $ 561,425 ____________________ *Senior Notes are classified as Level 2 within the fair value hierarchy. Fair value inputs include third-party calculations of the market interest rate of notes with similar ratings in similar industries over the remaining note terms. For details on the fair value of the Company’s interest rate swaps, restricted cash and investments and contingent consideration, refer to Note 14.

Other Comprehensive Income (Los

Other Comprehensive Income (Loss)	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Other Comprehensive Income (Loss) [Abstract]
Other Comprehensive Income (Loss)	15. Other comprehensive income (loss) includes changes in the fair value of interest rate swaps that qualify for hedge accounting. The components of other comprehensive income (loss) and related tax effects for the three months ended March 31, 2023 and 2022 are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 31, 2023 ​ Gross Tax Effect Net of Tax Interest rate swap amounts reclassified into interest expense ​ $ (4,080) ​ ​ 1,081 ​ $ (2,999) Changes in fair value of interest rate swaps ​ (3,299) ​ ​ 874 ​ (2,425) Foreign currency translation adjustment ​ 1,682 ​ — ​ 1,682 ​ ​ $ (5,697) ​ $ 1,955 ​ $ (3,742) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 31, 2022 ​ Gross Tax Effect Net of Tax Interest rate swap amounts reclassified into interest expense ​ $ 4,750 ​ $ (1,259) ​ $ 3,491 Changes in fair value of interest rate swaps ​ 44,699 ​ (11,845) ​ 32,854 Foreign currency translation adjustment ​ 34,429 ​ — ​ 34,429 ​ ​ $ 83,878 ​ $ (13,104) ​ $ 70,774 ​ A rollforward of the amounts included in AOCIL, net of taxes, for the three months ended March 31, 2023 and 2022, is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Foreign Accumulated ​ ​ ​ ​ ​ Currency ​ Other ​ ​ Interest ​ Translation ​ Comprehensive ​ ​ Rate Swaps ​ Adjustment ​ Income (Loss) Balance at December 31, 2022 ​ $ 23,378 ​ $ (80,208) ​ $ (56,830) Amounts reclassified into earnings ​ ​ (2,999) ​ ​ — ​ ​ (2,999) Changes in fair value ​ ​ (2,425) ​ ​ — ​ ​ (2,425) Foreign currency translation adjustment ​ ​ — ​ ​ 1,682 ​ ​ 1,682 Balance at March 31, 2023 ​ $ 17,954 ​ $ (78,526) ​ $ (60,572) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Foreign Accumulated ​ ​ ​ ​ ​ Currency ​ Other ​ ​ Interest ​ Translation ​ Comprehensive ​ ​ Rate Swaps ​ Adjustment ​ Income (Loss) Balance at December 31, 2021 ​ $ (37,544) ​ $ 77,128 ​ $ 39,584 Amounts reclassified into earnings ​ 3,491 ​ — ​ 3,491 Changes in fair value ​ 32,854 ​ — ​ 32,854 Foreign currency translation adjustment ​ — ​ 34,429 ​ 34,429 Balance at March 31, 2022 ​ $ (1,199) ​ $ 111,557 ​ $ 110,358 ​ See Note 11 for further discussion on the Company’s derivative instruments.	15. OTHER COMPREHENSIVE INCOME (LOSS) Other comprehensive income (loss) includes changes in the fair value of interest rate swaps that qualify for hedge accounting. The components of other comprehensive income (loss) and related tax effects for the years ended December 31, 2022, 2021 and 2020, are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, 2022 ​ Gross Tax Effect Net of Tax Interest rate swap amounts reclassified into interest expense ​ $ 6,551 ​ $ (1,736) ​ $ 4,815 Changes in fair value of interest rate swaps ​ 76,336 ​ (20,229) ​ 56,107 Foreign currency translation adjustment ​ (157,336) ​ — ​ (157,336) ​ ​ $ (74,449) ​ $ (21,965) ​ $ (96,414) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, 2021 ​ Gross Tax Effect Net of Tax Interest rate swap amounts reclassified into interest expense ​ $ 20,321 ​ $ (5,385) ​ $ 14,936 Changes in fair value of interest rate swaps ​ 23,287 ​ (6,171) ​ 17,116 Foreign currency translation adjustment ​ 8,183 ​ — ​ 8,183 ​ ​ $ 51,791 ​ $ (11,556) ​ $ 40,235 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, 2020 ​ Gross Tax Effect Net of Tax Interest rate swap amounts reclassified into interest expense ​ $ 9,778 ​ $ (2,591) ​ $ 7,187 Changes in fair value of interest rate swaps ​ (64,664) ​ 17,136 ​ (47,528) Foreign currency translation adjustment ​ ​ 50,653 ​ ​ — ​ ​ 50,653 ​ ​ $ (4,233) ​ $ 14,545 ​ $ 10,312 ​ A roll forward of the amounts included in AOCIL, net of taxes, is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Foreign Accumulated ​ ​ ​ ​ ​ Currency ​ Other ​ ​ Interest ​ Translation ​ Comprehensive ​ ​ Rate Swaps ​ Adjustment ​ Income (Loss) Balance at December 31, 2020 ​ $ (69,596) ​ $ 68,945 ​ $ (651) Amounts reclassified into earnings ​ 14,936 ​ — ​ 14,936 Changes in fair value ​ 17,116 ​ — ​ 17,116 Foreign currency translation adjustment ​ — ​ 8,183 ​ 8,183 Balance at December 31, 2021 ​ ​ (37,544) ​ ​ 77,128 ​ ​ 39,584 Amounts reclassified into earnings ​ ​ 4,815 ​ ​ — ​ ​ 4,815 Changes in fair value ​ ​ 56,107 ​ ​ — ​ ​ 56,107 Foreign currency translation adjustment ​ ​ — ​ ​ (157,336) ​ ​ (157,336) Balance at December 31, 2022 ​ $ 23,378 ​ $ (80,208) ​ $ (56,830) ​

Shareholders' Equity

Shareholders' Equity	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Shareholders' Equity [Abstract]
Shareholders' Equity	16. Share-Based Compensation Restricted Share Units A summary of activity related to restricted share units (“RSUs”) during the three-month period ended March 31, 2023, is presented below: ​ ​ ​ ​ ​ Unvested Shares Outstanding at December 31, 2022 955,999 Granted 403,026 Forfeited (13,835) Vested and issued (325,490) Outstanding at March 31, 2023 1,019,700 ​ The weighted average grant-date fair value per share for the common shares underlying the RSUs granted during the three-month period ended March 31, 2023 was $133.46. Recipients of the Company’s RSUs who participate in the Company’s Nonqualified Deferred Compensation Plan may have elected in years prior to 2015 to defer some or all of their RSUs as they vest until a specified date or dates they choose. At the end of the deferral periods, unless a qualified participant makes certain other elections, the Company issues to recipients who deferred their RSUs common shares of the Company underlying the deferred RSUs. At March 31, 2023 and 2022, the Company had 62,201 and 81,712 vested deferred RSUs outstanding, respectively. Performance-Based Restricted Share Units A summary of activity related to performance-based restricted share units (“PSUs”) during the three-month period ended March 31, 2023, is presented below: ​ ​ ​ ​ ​ Unvested Shares Outstanding at December 31, 2022 341,850 Granted 105,581 Vested and issued (140,498) Outstanding at March 31, 2023 306,933 ​ During the three months ended March 31, 2023, the Company’s Compensation Committee granted PSUs with three-year performance-based metrics that the Company must meet before those awards may be earned, and the performance period for those grants ends on December 31, 2025. The Compensation Committee will determine the achievement of performance results and corresponding vesting of PSUs for each performance period. The weighted average grant-date fair value per share for the common shares underlying all PSUs granted during the three-month period ended March 31, 2023 was $133.30. Deferred Share Units A summary of activity related to deferred share units (“DSUs”) during the three-month period ended March 31, 2023, is presented below: ​ ​ ​ ​ ​ Vested Shares Outstanding at December 31, 2022 26,536 Granted 3,945 Outstanding at March 31, 2023 30,481 ​ The DSUs consist of a combination of DSU grants outstanding under the Progressive Waste share-based compensation plans that were continued by the Company following the Progressive Waste acquisition and DSUs granted by the Company since the Progressive Waste acquisition. The weighted average grant-date fair value per share for the common shares underlying the DSUs granted during the three-month period ended March 31, 2023 was $136.47. Other Restricted Share Units RSU grants outstanding under the Progressive Waste share-based compensation plans were continued by the Company following the Progressive Waste acquisition and allow for the issuance of shares or cash settlement to employees upon vesting. A summary of activity related to Progressive Waste RSUs during the three-month period ended March 31, 2023, is presented below: ​ ​ ​ ​ Outstanding at December 31, 2022 57,829 Cash settled (5,803) Outstanding at March 31, 2023 52,026 ​ No RSUs under the Progressive Waste share-based compensation plans were granted subsequent to June 1, 2016. All remaining RSUs were vested as of March 31, 2019. Share-Based Options Share-based options outstanding under the Progressive Waste share-based compensation plans were continued by the Company following the Progressive Waste acquisition and allow for the issuance of shares or cash settlement to employees upon vesting. A summary of activity related to Progressive Waste share-based options during the three-month period ended March 31, 2023, is presented below: ​ ​ ​ ​ Outstanding at December 31, 2022 43,570 Cash settled — Outstanding at March 31, 2023 43,570 ​ No share-based options under the Progressive Waste share-based compensation plans were granted subsequent to June 1, 2016. All outstanding share-based options were vested as of December 31, 2017. Employee Share Purchase Plan On May 15, 2020, the Company’s shareholders approved the 2020 Employee Share Purchase Plan (the “ESPP”). Under the ESPP, qualified employees may elect to have payroll deductions withheld from their eligible compensation on each payroll date in amounts equal to or greater than one percent (1%) but not in excess of ten percent (10%) of eligible compensation in order to purchase the Company’s common shares under certain terms and subject to certain restrictions set forth in the ESPP. The exercise price is equal to 95% of the closing price of the Company’s common shares on the last day of the relevant offering period, provided, however, that such exercise price will not be less than 85% of the volume weighted average price of the Company’s common shares as reflected on the Toronto Stock Exchange (the “TSX”) over the final five trading days of such offering period. The maximum number of shares that may be issued under the ESPP is 1,000,000. Under the ESPP, employees purchased 14,594 of the Company’s common shares for $1,841 during the three months ended March 31, 2023. Under the ESPP, employees purchased 12,015 of the Company’s common shares for $1,554 during the three months ended March 31, 2022. Normal Course Issuer Bid On July 26, 2022, the Board of Directors of the Company approved, subject to receipt of regulatory approvals, the annual renewal of the Company’s normal course issuer bid (the “NCIB”) to purchase up to 12,859,066 of the Company’s common shares during the period of August 10, 2022 to August 9, 2023 or until such earlier time as the NCIB is completed or terminated at the option of the Company. The renewal followed the conclusion of the Company’s NCIB that expired August 9, 2022. The Company received TSX approval for its annual renewal of the NCIB on August 8, 2022. Under the NCIB, the Company may make share repurchases only in the open market, including on the New York Stock Exchange (the “NYSE”), the TSX, and/or alternative Canadian trading systems, at the prevailing market price at the time of the transaction. In accordance with TSX rules, any daily repurchases made through the TSX and alternative Canadian trading systems is limited to a maximum of 85,956 common shares, which represents 25% of the average daily trading volume on the TSX of 343,825 common shares for the period from February 1, 2022 to July 31, 2022. The TSX rules also allow the Company to purchase, once a week, a block of common shares not owned by any insiders, which may exceed such daily limit. The maximum number of shares that can be purchased per day on the NYSE will be 25% of the average daily trading volume for the four calendar weeks preceding the date of purchase, subject to certain exceptions for block purchases. The timing and amounts of any repurchases pursuant to the NCIB will depend on many factors, including the Company’s capital structure, the market price of the common shares and overall market conditions. All common shares purchased under the NCIB shall be immediately cancelled following their repurchase. For the three months ended March 31, 2023, the Company did not repurchase any Cash Dividend In November 2022, the Company announced that its Board of Directors increased its regular quarterly cash dividend by $0.025, from $0.23 to $0.255 per Company common share. Cash dividends of $65,788 and $59,391 were paid during the three months ended March 31, 2023 and 2022, respectively.	14. SHAREHOLDERS’ EQUITY Employee Share Purchase Plan On May 15, 2020, the Company’s shareholders approved the ESPP. Under the ESPP, qualified employees may elect to have payroll deductions withheld from their eligible compensation on each payroll date in amounts equal to or greater than one percent (1%) but not in excess of ten percent (10%) of eligible compensation in order to purchase the Company’s common shares under certain terms and subject to certain restrictions set forth in the ESPP. The exercise price is equal to 95% of the closing price of the Company’s common shares on the last day of the relevant offering period; provided, however, that such exercise price will not be less than 85% of the volume weighted average price of the Company’s common shares as reflected on the TSX over the final five trading days of such offering period. The maximum number of shares that may be issued under the ESPP is 1,000,000. Under the ESPP, employees purchased 26,582 of the Company’s common shares for $3,270 during the year ended December 31, 2022. Under the ESPP, employees purchased 10,813 of the Company’s common shares for $1,222 during the year ended December 31, 2021. Cash Dividend The Board of Directors of the Company authorized the initiation of a quarterly cash dividend in October 2010 and has increased it on an annual basis. In November 2022, the Company announced that its Board of Directors increased its regular quarterly cash dividend by $0.025, from $0.23 to $0.255 per Company common share. Cash dividends of $243,013, $220,203 and $199,883 were paid during the years ended December 31, 2022, 2021 and 2020, respectively. Normal Course Issuer Bid On July 26, 2022, the Board of Directors of the Company approved, subject to receipt of regulatory approvals, the annual renewal of the Company’s normal course issuer bid (the “NCIB”) to purchase up to 12,859,066 of the Company’s common shares during the period of August 10, 2022 to August 9, 2023 or until such earlier time as the NCIB is completed or terminated at the option of the Company. The renewal followed the conclusion of the Company’s NCIB that expired August 9, 2022. The Company received TSX approval for its annual renewal of the NCIB on August 8, 2022. Under the NCIB, the Company may make share repurchases only in the open market, including on the NYSE, the TSX, and/or alternative Canadian trading systems, at the prevailing market price at the time of the transaction. In accordance with TSX rules, any daily repurchases made through the TSX and alternative Canadian trading systems is limited to a maximum of 85,956 common shares, which represents 25% of the average daily trading volume on the TSX of 343,825 common shares for the period from February 1, 2022 to July 31, 2022. The TSX rules also allow the Company to purchase, once a week, a block of common shares not owned by any insiders, which may exceed such daily limit. The maximum number of shares that can be purchased per day on the NYSE will be 25% of the average daily trading volume for the four calendar weeks preceding the date of purchase, subject to certain exceptions for block purchases. The timing and amounts of any repurchases pursuant to the NCIB will depend on many factors, including the Company’s capital structure, the market price of the common shares and overall market conditions. All common shares purchased under the NCIB will be immediately cancelled following their repurchase. For the year ended December 31, 2022, the Company repurchased 3,388,155 common shares pursuant to the NCIB in effect during that period at an aggregate cost of $424,999. For the year ended December 31, 2021, the Company repurchased 3,003,822 common shares pursuant to the NCIB in effect during that period at an aggregate cost of $338,993. For the year ended December 31, 2020, the Company repurchased 1,271,977 common shares pursuant to the NCIB in effect during that period at an aggregate cost of $105,654. As of December 31, 2022, the remaining maximum number of shares available for repurchase under the NCIB was 12,859,066. Common Shares The Company is authorized to issue an unlimited number of common shares, that have no par value, and uses reserved but unissued common shares to satisfy its obligations under its equity-based compensation plans. As of December 31, 2022, the Company has reserved the following common shares for issuance: ​ ​ ​ ​ For outstanding RSUs, PSUs and warrants 2,233,831 For future grants under the 2016 Incentive Award Plan 3,262,941 For future grants under the Employee Share Purchase Plan ​ 948,011 ​ 6,444,783 ​ Common Shares Held in Trust Common shares held in trust at December 31, 2022 consist of 65,459 shares of the Company held in a trust that were acquired by Progressive Waste prior to June 1, 2016 for the benefit of its U.S. and Canadian employees participating in certain share-based compensation plans. A total of 735,171 common shares were held in the trust on June 1, 2016 when it was acquired by the Company in the Progressive Waste acquisition. Common shares held in trust are classified as treasury shares in the Company’s Consolidated Balance Sheets. The Company will sell shares out of the trust and remit cash or shares to employees and non-employee directors as restricted share units vest and deferred share units settle, under the Progressive Waste share-based compensation plans that were continued by the Company. During the years ended December 31, 2022, 2021 and 2020, the Company sold 5,203, 3,522 and 7,330 common shares held in the trust, respectively, to settle vested restricted share units and deferred share units. Special Shares The Company is authorized to issue an unlimited number of special shares. Holders of special shares are entitled to one vote in matters of the Company for each special share held. The special shares carry no right to receive dividends or to receive the remaining property or assets of the Company upon dissolution or wind-up. At December 31, 2022, 2021 and 2020, no special shares were issued. Preferred Shares The Company is authorized to issue an unlimited number of preferred shares, issuable in series. Each series of preferred shares issued shall have rights, privileges, restrictions and conditions as determined by the Board of Directors prior to their issuance. Preferred shareholders are not entitled to vote, but take preference over the common shareholders rights in the remaining property and assets of the Company in the event of dissolution or wind-up. At December 31, 2022, 2021 and 2020, no preferred shares were issued. Restricted Share Units, Performance-Based Restricted Share Units, Share Options and Share Purchase Warrants In connection with the Progressive Waste acquisition, each Waste Connections US, Inc. restricted stock unit award, deferred restricted stock unit award and warrant outstanding immediately prior to the Progressive Waste acquisition was automatically converted into a restricted share unit award, deferred restricted share unit award or warrant, as applicable, relating to an equal number of common shares of the Company, on the same terms and conditions as were applicable immediately prior to the Progressive Waste acquisition under such equity award. Such conversion of equity awards was approved by the Company’s shareholders at its shareholder meeting as part of the shareholders’ approval of the Progressive Waste acquisition. At its meeting on June 1, 2016, the Company’s Board of Directors approved the assumption by the Company of the Waste Connections US, Inc. 2014 Incentive Plan Award (the “2014 Plan”), the Waste Connections US, Inc. Third Amended and Restated 2004 Equity Incentive Plan (the “2004 Plan”), and the Waste Connections US, Inc. Consultant Incentive Plan (the “Consultant Plan,” and, together with the 2014 Plan and the 2004 Plan, the “Assumed Plans”) for the purposes of administering the Assumed Plans and the awards issued thereunder. No additional awards will be made under any of the Assumed Plans. Upon the vesting, expiration, exercise in accordance with their terms or other settlement of all of the awards made pursuant to an Assumed Plan, such Assumed Plan shall automatically terminate. The 2014 Plan and the Consultant Plan have each automatically terminated. Participation in the 2004 Plan was limited to employees, officers, directors and consultants. Restricted share units (“RSUs”) granted under the 2004 Plan generally vest in installments pursuant to a vesting schedule set forth in each agreement. The Board of Directors authorized the granting of awards under the 2004 Plan, and determined the employees and consultants to whom such awards were to be granted, the number of shares subject to each award, and the exercise price, term, vesting schedule and other terms and conditions of each award. RSU awards granted under the plan did not require any cash payment from the participant to whom an award was made. No grants have been made under the 2004 Plan since May 16, 2014 pursuant to the approval by the stockholders of the 2014 Plan on such date. On June 1, 2016, the Company’s Board of Directors adopted the 2016 Incentive Award Plan (the “2016 Plan”), which was approved by Progressive Waste’s shareholders on May 26, 2016. On each of July 24, 2017 and 2018, the Board of Directors approved certain housekeeping amendments to the 2016 Plan. The 2016 Plan, as amended, is administered by the Company’s Compensation Committee and provides that the aggregate number of common shares which may be issued from treasury pursuant to awards made under the 2016 Plan is 7,500,000 common shares. Awards under the 2016 Plan may be made to employees, consultants and non-employee directors and may be made in the form of options, warrants, restricted shares, restricted share units, performance awards (which may be paid in cash, common shares, or a combination thereof), dividend equivalent awards (representing a right of the holder thereof to receive the equivalent value (which may be paid in cash or common shares) of dividends paid on common shares), and share payments (a payment in the form of common shares or an option or other right to purchase common shares as part of a bonus, defined compensation or other arrangement). Non-employee directors are also eligible to receive deferred share units, which represent the right to receive a cash payment or its equivalent in common shares (or a combination of cash and common shares), or which may at the time of grant be expressly limited to settlement only in cash and not in common shares. Restricted Share Units A summary of the Company’s RSU activity is presented below: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ 2022 2021 2020 Weighted average grant-date fair value of restricted share units granted ​ $ 121.26 ​ $ 100.27 ​ $ 101.79 Total fair value of restricted share units vested ​ $ 28,751 ​ $ 26,711 ​ $ 23,742 ​ A summary of activity related to RSUs during the year ended December 31, 2022, is presented below: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted-Average ​ ​ ​ ​ Grant Date Fair ​ Unvested Shares ​ Value Per Share Outstanding at December 31, 2021 861,695 ​ $ 95.63 Granted 483,281 ​ $ 121.26 Forfeited (70,126) ​ $ 110.86 Vested and issued (318,851) ​ $ 90.17 Outstanding at December 31, 2022 955,999 ​ $ 109.29 ​ Recipients of the Company’s RSUs who participate in the Company’s Nonqualified Deferred Compensation Plan may have elected in years prior to 2015 to defer some or all of their RSUs as they vest until a specified date or dates they choose. At the end of the deferral periods, unless a qualified participant makes certain other elections, the Company issues to recipients who deferred their RSUs common shares of the Company underlying the deferred RSUs. At December 31, 2022, 2021 and 2020, the Company had 81,352, 100,861 and 177,760 vested deferred RSUs outstanding, respectively. Performance-Based Restricted Share Units A summary of the Company’s PSU activity is presented below: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ 2022 2021 2020 Weighted average grant-date fair value of PSUs granted ​ $ 117.94 ​ $ 96.99 ​ $ 87.19 Total fair value of PSUs vested ​ $ 4,674 ​ $ 10,954 ​ $ 15,628 ​ A summary of activity related to PSUs during the year ended December 31, 2022, is presented below: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted-Average ​ ​ ​ ​ Grant Date Fair ​ Unvested Shares ​ Value Per Share Outstanding at December 31, 2021 392,043 ​ $ 91.63 Granted 95,038 ​ $ 117.94 Forfeited (87,554) ​ $ 80.70 Vested and issued (57,677) ​ $ 81.04 Outstanding at December 31, 2022 341,850 ​ $ 103.53 ​ During the year ended December 31, 2022, the Company’s Compensation Committee granted PSUs with three-year performance-based metrics that the Company must meet before those awards may be earned, and the performance period for those grants ends on December 31, 2024. During the year ended December 31, 2021, the Company’s Compensation Committee granted PSUs with three-year performance-based metrics that the Company must meet before those awards may be earned, and the performance period for those grants ends on December 31, 2023. During the year ended December 31, 2020, the Company’s Compensation Committee granted PSUs with three-year performance-based metrics that the Company was required to meet before those awards were earned, and the performance period for those grants ended on December 31, 2022. During the same period, the Company’s Compensation Committee also granted PSUs with a one-year performance-based metric that the Company was required to meet before those awards were earned, with the awards then subject to time-based vesting for the remaining three years of their four-year vesting period. The Compensation Committee determines the achievement of performance results and corresponding vesting of PSUs for each performance period. Share Purchase Warrants The Company has outstanding share purchase warrants issued under the 2016 Plan. Warrants to purchase the Company’s common shares were issued to certain consultants to the Company. Warrants issued were fully vested and exercisable at the date of grant. Warrants outstanding at December 31, 2022, expire between 2023 and 2027. A summary of warrant activity during the year ended December 31, 2022, is presented below: ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted-Average ​ ​ Warrants ​ Exercise Price Outstanding at December 31, 2021 578,405 ​ $ 104.82 Granted 380,478 ​ $ 138.33 Forfeited (65,331) ​ $ 80.49 Exercised (38,922) ​ $ 78.24 Outstanding at December 31, 2022 854,630 ​ $ 122.81 ​ The following table summarizes information about warrants outstanding as of December 31, 2022 and 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value of ​ ​ ​ ​ ​ ​ Warrants ​ ​ ​ Warrants ​ Outstanding at December 31, Grant Date ​ Issued ​ Exercise Price ​ Issued ​ 2022 ​ 2021 Throughout 2017 35,382 ​ $53.65 to $69.96 ​ $ 595 — 1,521 Throughout 2018 163,995 ​ $70.91 to $80.90 ​ $ 2,591 45,024 112,756 Throughout 2019 ​ 151,008 ​ $74.25 to $95.61 ​ $ 2,634 ​ 66,977 ​ 101,977 Throughout 2020 ​ 164,890 ​ $72.65 to $104.89 ​ $ 3,140 ​ 146,386 ​ 146,386 Throughout 2021 ​ 218,166 ​ $99.33 to $135.97 ​ $ 5,584 ​ 215,765 ​ 215,765 Throughout 2022 ​ 380,478 ​ $125.32 to $143.95 ​ $ 12,972 ​ 380,478 ​ — ​ ​ ​ ​ ​ ​ ​ 854,630 578,405 ​ Deferred Share Units A summary of the Company’s deferred share units (“DSUs”) activity is presented below: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ 2022 ​ 2021 2020 Weighted average grant-date fair value of DSUs granted ​ $ 121.00 ​ $ 99.80 ​ $ 103.81 Total fair value of DSUs awarded ​ $ 253 ​ $ 285 ​ $ 272 ​ The DSUs consist of a combination of DSU grants outstanding under the Progressive Waste share-based compensation plans that were continued by the Company following the Progressive Waste acquisition and DSUs granted by the Company since the Progressive Waste acquisition. A summary of activity related to DSUs during the year ended December 31, 2022, is presented below: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted-Average ​ ​ ​ ​ Grant Date Fair ​ Vested Shares ​ Value Per Share Outstanding at December 31, 2021 24,442 ​ $ 64.05 Granted 2,094 ​ $ 121.00 Outstanding at December 31, 2022 26,536 ​ $ 68.55 ​ Other Restricted Share Units RSU grants outstanding under the Progressive Waste share-based compensation plans were continued by the Company following the Progressive Waste acquisition and allow for the issuance of shares or cash settlement to employees upon vesting. A summary of activity related to Progressive Waste RSUs during the year ended December 31, 2022, is presented below: ​ ​ ​ ​ Outstanding at December 31, 2021 63,032 Cash settled (5,203) Outstanding at December 31, 2022 57,829 ​ No RSUs under the Progressive Waste share-based compensation plans were granted subsequent to June 1, 2016. All remaining RSUs were vested as of December 31, 2019. Share-Based Options Share-based options outstanding under the Progressive Waste share-based compensation plans were continued by the Company following the Progressive Waste acquisition and allow for the issuance of shares or cash settlement to employees upon vesting. A summary of activity related to Progressive Waste share-based options during the year ended December 31, 2022, is presented below: ​ ​ ​ ​ Outstanding at December 31, 2021 45,869 Cash settled (2,299) Outstanding at December 31, 2022 43,570 ​ No share-based options under the Progressive Waste share-based compensation plans were granted subsequent to June 1, 2016. All outstanding share-based options were vested as of December 31, 2017.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Commitments and Contingencies [Abstract]
Commitments and Contingencies	17. In the normal course of its business and as a result of the extensive governmental regulation of the solid waste and E&P waste industries, the Company is subject to various judicial and administrative proceedings involving Canadian regulatory authorities as well as U.S. federal, state and local agencies. In these proceedings, an agency may subpoena the Company for records, or seek to impose fines on the Company or revoke or deny renewal of an authorization held by the Company, including an operating permit. From time to time, the Company may also be subject to actions brought by special interest or other groups, adjacent landowners or residents in connection with the permitting and licensing of landfills, transfer stations, and E&P waste treatment, recovery and disposal operations, or alleging environmental damage or violations of the permits and licenses pursuant to which the Company operates. The Company uses $1,000 as a threshold for disclosing environmental matters involving potential monetary sanctions. In addition, the Company is a party to various claims and suits pending for alleged damages to persons and property, alleged violations of certain laws and alleged liabilities arising out of matters occurring during the normal operation of the Company’s business. Except as noted in the matters described below, as of March 31, 2023, there is no current proceeding or litigation involving the Company or its property that the Company believes could have a material adverse effect on its business, financial condition, results of operations or cash flows. Jefferson Parish, Louisiana Landfill Litigation Between June 2016 and December 31, 2020, one of the Company’s subsidiaries, Louisiana Regional Landfill Company (“LRLC”), conducted certain operations at a municipal solid waste landfill known as the Jefferson Parish Landfill (the “JP Landfill”), located in Avondale, Louisiana, near the City of New Orleans. LRLC’s operations were governed by an Operating Agreement, entered into in May 2012 by LRLC under its previous name, IESI LA Landfill Corporation, and the owner of the JP Landfill, Jefferson Parish (the “Parish”). The Parish also holds the State of Louisiana permit for the operation of the JP Landfill. Aptim Corporation operated the landfill gas collection system at the JP Landfill under a separate contract with the Parish. In July and August 2018, four separate lawsuits seeking class action status were filed against LRLC and certain other Company subsidiaries, the Parish, and Aptim Corporation in Louisiana state court, and subsequently removed to the United States District Court for the Eastern District of Louisiana, before Judge Susie Morgan in New Orleans. The Court later consolidated the claims of the putative class action plaintiffs. Beginning in December 2018, a series of 11 substantively identical mass actions were filed in Louisiana state court against LRLC and certain other Company subsidiaries, the Parish, and Aptim Corporation. The claims of the mass action plaintiffs were consolidated in federal court in the Eastern District of Louisiana, also before Judge Susie Morgan (the “Addison” action). The putative class actions and the Addison action assert claims for damages from odors allegedly emanating from the JP Landfill. The consolidated putative class action complaint alleges that the JP Landfill released “noxious odors” into the plaintiffs’ properties and the surrounding community and asserts a range of liability theories—nuisance, negligence (since dismissed), and strict liability—against all defendants. The putative class is described as all residents of Jefferson Parish who have sustained legally cognizable damages as a result of odors from the JP Landfill, but the complaint proposes to revise the geographic definition based on further evidence. The putative class plaintiffs seek unspecified damages for nuisance and unidentified property value diminution. The Addison plaintiffs assert claims for nuisance, negligence, and (with respect to the Parish) unconstitutional takings under the Louisiana Constitution; on behalf of two plaintiffs, the Addison complaint also asserts claims for wrongful death and survivorship. The Court held an eight-day trial on general causation during January and February 2022. General causation was to address the questions of whether the JP Landfill could cause odors and emissions that are able to reach plaintiffs’ properties and whether those odors and emissions could result in the types of medical impacts and nuisance conditions complained of by the putative class and mass action plaintiffs. Among other things, defendants urged the court to find general causation tied to the geographic limits of landfill emissions that may have the potential to cause a nuisance based on air modeling done by defendants’ experts. On November 29, 2022, the Court issued a 45-page decision on the general causation trial. The Court concluded that all putative class and mass action plaintiffs established general causation—specifically that emissions and gases from the JP Landfill were capable of causing certain damages alleged by the plaintiffs. The Court held that it only needed to determine the level of exposure necessary to result in injuries and that the level existed somewhere offsite, and that it was not required to delineate this level of exposure within a geographic area. The Court did, however, limit the time period for damages, to between July 2017 and December 2019, and the types of alleged injuries for which the plaintiffs are able to seek damages, to headaches, nausea, vomiting, loss of appetite, sleep disruption, dizziness, fatigue, anxiety and worry, a decrease in quality of life, and loss of enjoyment or use of property. The Addison The Court has held several case management conferences since the general causation decision to discuss how to proceed with the class and mass action cases, and the Court has proposed trying certain Addison On April 17, 2023, the Company and the other Defendants filed a petition for a writ of mandamus from the Fifth Circuit Court of Appeals challenging the April 17 case management order’s sequencing of a merits trial before class certification. The Defendants also filed a motion to stay proceedings in the district court until the Fifth Circuit issues a decision on the writ petition. The Fifth Circuit has requested responses from the Plaintiffs and invited a response from the district court, which were due April 26, 2023. The Company has already obtained dismissal of approximately one third of the original Addison plaintiffs, the number of which now totals 544, and believes it has strong defenses to the merits of the Addison action, including specific causation issues due to other odor sources in the area. The Company also believes it has strong defenses to certification of the putative class actions, although the Court has not yet indicated when it will allow certification to be briefed and decided, and sequencing of that process may be affected by the Fifth Circuit’s decision on the writ petition. The Company is continuing to vigorously defend itself in these lawsuits; however, at this time, the Company is not able to determine the likelihood of any outcome regarding the underlying claims, including the allocation of any potential liability among the Company, the Parish, and Aptim Corporation. Los Angeles County, California Landfill Expansion Litigation A. Chiquita Canyon, LLC Lawsuit Against Los Angeles County In October 2004, the Company’s subsidiary, Chiquita Canyon, LLC (“CCL”), then under prior ownership, filed an application (the “Application”) with the County of Los Angeles (the “County”) Department of Regional Planning (“DRP”) for a conditional use permit (the “CUP”) to authorize the continued operation and expansion of the Chiquita Canyon Landfill (the “CC Landfill”). The CC Landfill has operated since 1972, and as a regional landfill, accepted approximately 2.6 million tons of materials for disposal and beneficial use in 2022. The Application requested expansion of the existing waste footprint on CCL’s contiguous property, an increase in maximum elevation, creation of a new entrance and new support facilities, construction of a facility for the County or another third-party operator to host household hazardous waste collection events, designation of an area for mixed organics/composting, and other modifications. After many years of reviews and delays, upon the recommendation of County staff, the County’s Regional Planning Commission (the “Commission”) approved the Application on April 19, 2017, but imposed operating conditions, fees and exactions that substantially reduced the historical landfill operations and represented a large increase in aggregate taxes and fees. CCL objected to many of the requirements imposed by the Commission. Current estimates for new costs imposed on CCL under the CUP are in excess of $300,000. CCL appealed the Commission’s decision to the County Board of Supervisors, but the appeal was not successful. At a subsequent hearing, on July 25, 2017, the Board of Supervisors approved the CUP. On October 20, 2017, CCL filed in the Superior Court of California, County of Los Angeles a verified petition for writ of mandate and complaint against the County and the County Board of Supervisors captioned Chiquita Canyon, LLC v. County of Los Angeles, No. BS171262 (Los Angeles Co. Super Ct.) (the “Complaint”). The Complaint challenges the terms of the CUP in 13 counts generally alleging that the County violated multiple California and federal statutes and California and federal constitutional protections. CCL seeks the following relief: (a) an injunction and writ of mandate against certain of the CUP’s operational restrictions, taxes and fees, (b) a declaration that the challenged conditions are unconstitutional and in violation of state and federal statutes, (c) reimbursement for any such illegal fees paid under protest, (d) damages, (e) an award of just compensation for a taking, (f) attorney fees, and (g) all other appropriate legal and equitable relief. Following extensive litigation in 2018 and 2019 on the permissible scope of CCL’s challenge, the Superior Court issued its decision on July 2, 2020, granting CCL’s petition for writ of mandate in part and denying it in part. CCL prevailed with respect to 12 of the challenged conditions, many of which imposed new fees and exactions on the CC Landfill. On October 11, 2022, CCL and the County entered into a settlement agreement that requires CCL to file a CUP modification application with the County embodying the terms of the settlement agreement. CCL filed the CUP modification application on November 10, 2022. If the CUP modification application is approved by the County and certain other contingencies are satisfied, CCL will dismiss this lawsuit. However, at this time, the Company is not able to determine the likelihood of any outcome in this matter. B. December 11, 2017 Notice of Violation Regarding Certain CUP Conditions. The County, through its DRP, issued a Notice of Violation, dated December 11, 2017 (the “NOV”), alleging that CCL violated certain conditions of the CUP, including Condition 79(B)(6) of the CUP by failing to pay an $11,600 Bridge & Thoroughfare Fee (“B&T Fee”) that was purportedly due on July 25, 2017. The alleged B&T fee was ostensibly to fund the construction of transportation infrastructure in the area of the Landfill. At the time the NOV was issued, CCL had already contested the legality of the B&T fee in the October 20, 2017 Complaint filed against the County in Los Angeles County Superior Court, described above under paragraph A (the “CUP lawsuit”). On January 12, 2018, CCL filed an appeal of the alleged violations in the NOV. Subsequently, CCL filed additional legal arguments and exhibits contesting the NOV. On March 6, 2018, a DRP employee designated as hearing officer sustained the NOV, including the $11,600 B&T fee, and imposed an administrative penalty in the amount of $83 and a noncompliance fee of $0.75. A written decision memorializing the hearing officer’s findings and order was issued on July 10, 2018. On April 13, 2018, CCL filed in the Superior Court of California, County of Los Angeles a Petition for Writ of Administrative Mandamus against the County seeking to overturn the decision sustaining the NOV, contending that the NOV and decision are not supported by the facts or law. On July 17, 2018, the Court granted CCL leave to pay the $11,600 B&T fee and to amend its Complaint in the CUP lawsuit to reflect the payment under protest, allowing the challenge to the B&T fee under the Mitigation Fee Act to proceed in the CUP lawsuit. CCL paid the B&T fee under protest on August 10, 2018, and also paid on that date the administrative penalty of $83 and the noncompliance fee of $0.75. The Court indicated that the NOV case would be coordinated with the CUP lawsuit. On October 11, 2022, CCL and the County entered into the settlement agreement, described above under paragraph A. If the CUP modification application is approved by the County and certain other contingencies are satisfied, CCL will dismiss this lawsuit. However, at this time, the Company is not able to determine the likelihood of any outcome in this matter.	13. COMMITMENTS AND CONTINGENCIES COMMITMENTS Financial Surety Bonds The Company uses financial surety bonds for a variety of corporate guarantees. The two largest uses of financial surety bonds are for municipal contract performance guarantees and asset closure and retirement requirements under certain environmental regulations. Environmental regulations require demonstrated financial assurance to meet final capping, closure and post-closure requirements for landfills. In addition to surety bonds, these requirements may also be met through alternative financial assurance instruments, including insurance, letters of credit and restricted cash and investment deposits. At December 31, 2022 and 2021, the Company had provided customers and various regulatory authorities with surety bonds in the aggregate amounts of approximately $811,243 and $744,037, respectively, to secure its asset closure and retirement requirements and $636,224 and $556,570, respectively, to secure performance under collection contracts and landfill operating agreements. The Company owns a 9.9% interest in a company that, among other activities, issues financial surety bonds to secure landfill final capping, closure and post-closure obligations for companies operating in the solid waste industry. The Company accounts for this investment under the cost method of accounting. There have been no identified events or changes in circumstances that may have a significant adverse effect on the carrying value of the investment. This investee company and the parent company of the investee have written financial surety bonds for the Company, of which $424,379 and $410,378 were outstanding as of December 31, 2022 and 2021, respectively. The Company’s reimbursement obligations under these bonds are secured by a pledge of its stock in the investee company. Unconditional Purchase Obligations At December 31, 2022, the Company’s unconditional purchase obligations consist of multiple fixed-price fuel purchase contracts under which it has 57.9 million gallons remaining to be purchased for a total of $184,918. These fuel purchase contracts expire on or before December 31, 2024. During the years ended December 31, 2022, 2021 and 2020, the Company paid $112,136, $100,220 and $93,813, respectively, under the respective fuel purchase contracts then outstanding. As of December 31, 2022, future minimum purchase commitments, by calendar year, are as follows: ​ ​ ​ ​ ​ 2023 $ 149,858 2024 ​ 35,060 ​ ​ $ 184,918 ​ CONTINGENCIES Environmental Risks The Company expenses costs incurred to investigate and remediate environmental issues unless they extend the economic useful lives of the related assets. The Company records liabilities when it is probable that an obligation has been incurred and the amounts can be reasonably estimated. The remediation reserves cover anticipated costs, including remediation of environmental damage that waste facilities may have caused to neighboring landowners or residents as a result of contamination of soil, groundwater or surface water, including damage resulting from conditions existing prior to the Company’s acquisition of such facilities. The Company’s estimates are based primarily on investigations and remediation plans established by independent consultants, regulatory agencies and potentially responsible third parties. The Company does not discount remediation obligations. At December 31, 2022 and 2021, the current portion of remediation reserves was $3,165 and $2,300, respectively, which is included in Accrued liabilities in the Consolidated Balance Sheets. At December 31, 2022 and 2021, the long-term portion of remediation reserves was $17,284 and $20,483, respectively, which is included in Other long-term liabilities in the Consolidated Balance Sheets. Any substantial increase in the liabilities for remediation of environmental damage incurred by the Company could have a material adverse effect on the Company’s financial condition, results of operations or cash flows. Legal Proceedings In the normal course of its business and as a result of the extensive governmental regulation of the solid waste and E&P waste industries, the Company is subject to various judicial and administrative proceedings involving Canadian regulatory authorities as well as U.S. federal, state and local agencies. In these proceedings, an agency may subpoena the Company for records, or seek to impose fines on the Company or revoke or deny renewal of an authorization held by the Company, including an operating permit. From time to time, the Company may also be subject to actions brought by special interest or other groups, adjacent landowners or residents in connection with the permitting and licensing of landfills, transfer stations, and E&P waste treatment, recovery and disposal operations, or alleging environmental damage or violations of the permits and licenses pursuant to which the Company operates. The Company uses $1,000 as a threshold (up from the previously required threshold of $300) for disclosing environmental matters involving potential monetary sanctions. In addition, the Company is a party to various claims and suits pending for alleged damages to persons and property, alleged violations of certain laws and alleged liabilities arising out of matters occurring during the normal operation of the Company’s business. Except as noted in the matters described below, as of December 31, 2022, there is no current proceeding or litigation involving the Company or its property that the Company believes could have a material adverse effect on its business, financial condition, results of operations or cash flows. Jefferson Parish, Louisiana Landfill Litigation Between June 2016 and December 31, 2020, one of the Company’s subsidiaries, Louisiana Regional Landfill Company (“LRLC”), conducted certain operations at a municipal solid waste landfill known as the Jefferson Parish Landfill (the “Landfill”), located in Avondale, Louisiana, near the City of New Orleans. LRLC’s operations were governed by an Operating Agreement, entered into in May 2012 by LRLC under its previous name, IESI LA Landfill Corporation, and the owner of the Landfill, Jefferson Parish (the “Parish”). The Parish also holds the State of Louisiana permit for the operation of the Landfill. Aptim Corporation operated the landfill gas collection system at the Landfill under a separate contract with the Parish. In July and August 2018, four separate lawsuits seeking class action status were filed against LRLC and certain other Company subsidiaries, the Parish, and Aptim Corporation in Louisiana state court, and subsequently removed to the United States District Court for the Eastern District of Louisiana, before Judge Susie Morgan in New Orleans. The Court later consolidated the claims of the putative class action plaintiffs. Beginning in December 2018, a series of 11 substantively identical mass actions were filed in Louisiana state court against LRLC and certain other Company subsidiaries, the Parish, and Aptim Corporation. The claims of the mass action plaintiffs were consolidated in federal court in the Eastern District of Louisiana, also before Judge Susie Morgan (the “Addison” action). The putative class actions and the Addison action assert claims for damages from odors allegedly emanating from the Landfill. The consolidated putative class action complaint alleges that the Landfill released “noxious odors” into the plaintiffs’ properties and the surrounding community and asserts a range of liability theories—nuisance, negligence (since dismissed), and strict liability—against all defendants. The putative class is described as all residents of Jefferson Parish who have sustained legally cognizable damages as a result of odors from the Landfill, but the complaint proposes to revise the geographic definition based on further evidence. The putative class plaintiffs seek unspecified damages for unidentified nuisance and property value diminution. The Addison plaintiffs assert claims for nuisance, negligence, and (with respect to the Parish) unconstitutional takings under the Louisiana constitution; on behalf of two plaintiffs, the Addison complaint also asserts claims for wrongful death and survivorship. The Court held an eight-day trial on general causation during January and February 2022. General causation was to address the questions of whether the Landfill could cause odors and emissions that are able to reach plaintiffs’ properties and whether those odors and emissions could result in the types of medical impacts and nuisance conditions complained of by the putative class and mass action plaintiffs. Among other things, defendants urged the court to find general causation tied to the geographic limits of landfill emissions that may have the potential to cause a nuisance based on air modeling done by defendants’ experts. On November 29, 2022, the Court issued a 45-page decision on the general causation trial. The Court concluded that all putative class and mass action plaintiffs established general causation—specifically that emissions and gases from the Landfill were capable of causing certain damages alleged by the plaintiffs. The Court held that it only needed to determine the level of exposure necessary to result in injuries and that the level existed somewhere offsite, and that it was not required to delineate this level of exposure within a geographic area. The Court did, however, limit the time period for damages, to between July 2017 and December 2019, and the types of alleged injuries for which the plaintiffs are able to seek damages, to headaches, nausea, vomiting, loss of appetite, sleep disruption, dizziness, fatigue, anxiety and worry, a decrease in quality of life, and loss of enjoyment or use of property. The Addison The Court has held two case management conferences since the general causation decision to discuss how to proceed with the class and mass action cases, and the Court has proposed trying certain Addison The Company has already obtained dismissal of approximately one third of the original Addison plaintiffs, the number of which now total 547, and believes it has strong defenses to the merits of the mass actions, including specific causation issues due to other odor sources in the area. The Company also believes it has strong defenses to certification of the putative class actions, although the Court has not yet indicated when it will allow certification to be briefed and decided. The Company is continuing to vigorously defend itself in these lawsuits; however, at this time, the Company is not able to determine the likelihood of any outcome regarding the underlying claims, including the allocation of any potential liability among the Company, the Parish and Aptim Corporation. Los Angeles County, California Landfill Expansion Litigation A. Chiquita Canyon, LLC Lawsuit Against Los Angeles County In October 2004, the Company’s subsidiary, Chiquita Canyon, LLC (“CCL”), then under prior ownership, filed an application (the “Application”) with the County of Los Angeles (the “County”) Department of Regional Planning (“DRP”) for a conditional use permit (the “CUP”) to authorize the continued operation and expansion of the Chiquita Canyon Landfill (the “Landfill”). The Landfill has operated since 1972, and as a regional landfill, accepted approximately 2.6 million tons of materials for disposal and beneficial use in 2022. The Application requested expansion of the existing waste footprint on CCL’s contiguous property, an increase in maximum elevation, creation of a new entrance and new support facilities, construction of a facility for the County or another third-party operator to host household hazardous waste collection events, designation of an area for mixed organics/composting, and other modifications. After many years of reviews and delays, upon the recommendation of County staff, the County’s Regional Planning Commission (the “Commission”) approved the Application on April 19, 2017, but imposed operating conditions, fees and exactions that substantially reduced the historical landfill operations and represented a large increase in aggregate taxes and fees. CCL objected to many of the requirements imposed by the Commission. Current estimates for new costs imposed on CCL under the CUP are in excess of $300,000. CCL appealed the Commission’s decision to the County Board of Supervisors, but the appeal was not successful. At a subsequent hearing, on July 25, 2017, the Board of Supervisors approved the CUP. On October 20, 2017, CCL filed in the Superior Court of California, County of Los Angeles a verified petition for writ of mandate and complaint against the County and the County Board of Supervisors captioned Chiquita Canyon, LLC v. County of Los Angeles, No. BS171262 (Los Angeles Co. Super Ct.) (the “Complaint”). The Complaint challenges the terms of the CUP in 13 counts generally alleging that the County violated multiple California and federal statutes and California and federal constitutional protections. CCL seeks the following relief: (a) an injunction and writ of mandate against certain of the CUP’s operational restrictions, taxes and fees, (b) a declaration that the challenged conditions are unconstitutional and in violation of state and federal statutes, (c) reimbursement for any such illegal fees paid under protest, (d) damages, (e) an award of just compensation for a taking, (f) attorney fees, and (g) all other appropriate legal and equitable relief. Following extensive litigation in 2018 and 2019 on the permissible scope of CCL’s challenge, the Superior Court issued its decision on July 2, 2020, granting CCL’s petition for writ of mandate in part and denying it in part. CCL prevailed with respect to 12 of the challenged conditions, many of which imposed new fees and exactions on the Landfill. On October 11, 2022, CCL and the County entered into a settlement agreement that requires Chiquita to file a CUP modification application with the County embodying the terms of the settlement agreement. Chiquita filed the CUP modification application on November 10, 2022. If the CUP modification application is approved by the County and certain other contingencies are satisfied, Chiquita will dismiss this lawsuit. However, at this time, the Company is not able to determine the likelihood of any outcome in this matter. B. December 11, 2017 Notice of Violation Regarding Certain CUP Conditions. The County, through its DRP, issued a Notice of Violation, dated December 11, 2017 (the “NOV”), alleging that CCL violated certain conditions of the CUP, including Condition 79(B)(6) of the CUP by failing to pay an $11,600 Bridge & Thoroughfare Fee (“B&T Fee”) that was purportedly due on July 25, 2017. The alleged B&T fee was ostensibly to fund the construction of transportation infrastructure in the area of the Landfill. At the time the NOV was issued, CCL had already contested the legality of the B&T fee in the October 20, 2017 Complaint filed against the County in Los Angeles County Superior Court, described above under paragraph A (the “CUP lawsuit”). On January 12, 2018, CCL filed an appeal of the alleged violations in the NOV. Subsequently, CCL filed additional legal arguments and exhibits contesting the NOV. On March 6, 2018, a DRP employee designated as hearing officer sustained the NOV, including the $11,600 B&T fee, and imposed an administrative penalty in the amount of $83 and a noncompliance fee of $0.75. A written decision memorializing the hearing officer’s findings and order was issued on July 10, 2018. On April 13, 2018, CCL filed in the Superior Court of California, County of Los Angeles a Petition for Writ of Administrative Mandamus against the County seeking to overturn the decision sustaining the NOV, contending that the NOV and decision are not supported by the facts or law. On July 17, 2018, the Court granted CCL leave to pay the $11,600 B&T fee and to amend its Complaint in the CUP lawsuit to reflect the payment under protest, allowing the challenge to the B&T fee under the Mitigation Fee Act to proceed in the CUP lawsuit. CCL paid the B&T fee under protest on August 10, 2018, and also paid on that date the administrative penalty of $83 and a noncompliance fee of $0.75. The Court indicated that the NOV case would be coordinated with the CUP lawsuit. On October 11, 2022, CCL and the County entered into a settlement agreement, described above under paragraph A. If the CUP modification application is approved by the County and certain other contingencies are satisfied, Chiquita will dismiss this lawsuit. However, at this time, the Company is not able to determine the likelihood of any outcome in this matter. Collective Bargaining Agreements Seventeen of the Company’s collective bargaining agreements have expired or are set to expire in 2023. The Company does not expect any significant disruption in its overall business in 2023 as a result of labor negotiations, employee strikes or organizational efforts.

Subsequent Events

Subsequent Events	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Subsequent Events [Abstract]
Subsequent Events	18 . SUBSEQUENT EVENTS (UNAUDITED) Effective April 1, 2023, the Company modified its organizational structure under new regional operating segments as the result of continued growth in the business. Beginning in the second quarter of 2023, the Company will report revenue and segment EBITDA based on the following six geographic solid waste operating segments: Southern, Eastern, MidSouth, Western, Central and Canada. On April 24, 2023, the Company announced the departure of Worthing F. Jackman from his role as President and Chief Executive Officer of the Company, effective April 23, 2023. For purposes of Mr. Jackman’s letter agreement dated July 25, 2019, as amended, and the related Separation Benefits Plan as amended and restated July 26, 2022, Mr. Jackman’s departure qualified as a termination without cause. On April 24, 2023, the Company also announced that Ronald J. Mittelstaedt succeeded Mr. Jackman as the Company’s President and Chief Executive Officer. Mr. Mittelstaedt is the Company’s founder and served as the Company’s Chief Executive Officer from 1997 until July 2019, when he transitioned to the position of Executive Chairman. On April 26, 2023, the Company announced that its Board of Directors approved a regular quarterly cash dividend of $0.255 per Company common share. The dividend will be paid on May 24, 2023, to shareholders of record on the close of business on May 10, 2023.	20. SUBSEQUENT EVENT (UNAUDITED) On February 15, 2023, the Company announced that its Board of Directors approved a regular quarterly cash dividend of $0.255 per Company common share. The dividend will be paid on March 15, 2023, to shareholders of record on the close of business on March 1, 2023.

Leases (Policy)

Leases (Policy)	12 Months Ended
	Dec. 31, 2022
Lessee, Lease, Description [Line Items]
Leases	The Company rents certain equipment and facilities under short-term agreements, non-cancelable operating lease agreements and finance leases. The Company determines if an arrangement is or contains a lease at contract inception. The Company recognizes a right-of-use (“ROU”) asset and a lease liability at the lease commencement date. The lease liability is initially measured at the present value of the unpaid lease payments at the lease commencement date. Key estimates and judgments include how the Company determines (1) the discount rate it uses to discount the unpaid lease payments to present value, (2) lease term and (3) lease payments. The lease guidance requires a lessee to discount its unpaid lease payments using the interest rate implicit in the lease or, if that rate cannot be readily determined, its incremental borrowing rate. Generally, the Company cannot determine the interest rate implicit in the lease because it does not have access to the lessor’s estimated residual value or the amount of the lessor’s deferred initial direct costs. Therefore, the Company generally uses its incremental borrowing rate as the discount rate for the lease. The Company’s incremental borrowing rate for a lease is the rate of interest it would have to pay on a collateralized basis to borrow an amount equal to the lease payments under similar terms. The lease term for the Company’s leases includes the noncancelable period of the lease, plus any additional periods covered by either a Company option to extend (or not to terminate) the lease that the Company is reasonably certain to exercise, or an option to extend (or not to terminate) the lease controlled by the lessor. Lease payments included in the measurement of the lease liability comprise fixed payments or variable lease payments. The variable lease payments take into account annual changes in the consumer price index and common area maintenance charges, if known. ROU assets for operating and finance leases are periodically reviewed for impairment losses. The Company uses the long-lived asset impairment guidance in ASC Subtopic 360-10, Property, Plant, and Equipment – Overall, to determine whether an ROU asset is impaired, and if so, the amount of the impairment loss to recognize. The Company did not recognize an impairment charge for any The Company monitors for events or changes in circumstances that require a reassessment of one of its leases. When a reassessment results in the remeasurement of a lease liability, a corresponding adjustment is made to the carrying amount of the corresponding ROU asset. The Company did not recognize any significant remeasurements during the years ended December 31, 2022, 2021 and 2020. The Company has elected not to recognize ROU assets and lease liabilities for short-term leases that have a lease term of less than 12 months. The Company has elected to apply the short-term lease recognition and measurement exemption allowed for in the lease accounting standard. The Company recognizes the lease payments associated with its short-term leases as an expense on a straight-line basis over the lease term.

Revenue (Tables)

Revenue (Tables)	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Revenue [Abstract]
Total Reported Revenues by Service Line	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 31, ​ ​ 2023 2022 Commercial ​ $ 602,279 ​ $ 499,676 Residential ​ ​ 514,053 ​ ​ 440,288 ​ Industrial and construction roll off ​ ​ 318,315 ​ ​ 259,488 ​ Total collection ​ ​ 1,434,647 ​ ​ 1,199,452 ​ Landfill ​ ​ 343,433 ​ ​ 299,765 ​ Transfer ​ ​ 273,521 ​ ​ 217,957 ​ Recycling ​ ​ 31,301 ​ ​ 63,094 ​ E&P ​ ​ 51,759 ​ ​ 43,555 ​ Intermodal and other ​ ​ 38,212 ​ ​ 45,693 ​ Intercompany ​ ​ (272,370) ​ ​ (223,261) ​ Total ​ $ 1,900,503 ​ $ 1,646,255	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ 2022 2021 2020 Commercial $ 2,176,295 ​ $ 1,813,426 $ 1,610,313 Residential ​ ​ 1,891,108 ​ ​ 1,673,819 ​ ​ 1,528,217 Industrial and construction roll off ​ ​ 1,183,624 ​ ​ 954,181 ​ ​ 833,148 Total collection ​ ​ 5,251,027 ​ ​ 4,441,426 ​ ​ 3,971,678 Landfill ​ ​ 1,328,942 ​ ​ 1,233,499 ​ ​ 1,146,732 Transfer ​ ​ 1,026,050 ​ ​ 859,113 ​ ​ 777,754 Recycling ​ ​ 204,876 ​ ​ 205,076 ​ ​ 86,389 E&P ​ ​ 210,562 ​ ​ 138,707 ​ ​ 159,438 Intermodal and other ​ ​ 188,471 ​ ​ 152,194 ​ ​ 118,396 Intercompany ​ ​ (998,069) ​ ​ (878,654) ​ ​ (814,397) Total $ 7,211,859 ​ $ 6,151,361 $ 5,445,990

Accounts Receivable (Tables)

Accounts Receivable (Tables)	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Credit Loss	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 31, ​ ​ 2023 2022 Beginning balance ​ $ 22,939 ​ $ 18,480 Current period provision for expected credit losses ​ ​ 2,247 ​ ​ 3,022 Write-offs charged against the allowance ​ ​ (5,017) ​ ​ (3,435) Recoveries collected ​ ​ 2,068 ​ ​ 1,272 Impact of changes in foreign currency ​ ​ 2 ​ ​ 22 Ending balance ​ $ 22,239 ​ $ 19,361	The following is a rollforward of the Company’s allowance for credit losses for the periods indicated: ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ ​ 2022 2021 Beginning balance ​ $ 18,480 ​ $ 19,380 Current period provision for expected credit losses ​ ​ 17,353 ​ ​ 9,719 Write-offs charged against the allowance ​ ​ (18,273) ​ ​ (15,545) Recoveries collected ​ ​ 5,473 ​ ​ 4,918 Impact of changes in foreign currency ​ ​ (94) ​ ​ 8 Ending balance ​ $ 22,939 ​ $ 18,480

Landfill Accounting (Tables)

Landfill Accounting (Tables)	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Landfill Accounting [Abstract]
Reconciliation of Final Capping, Closure and Post-Closure Liability Balance	The following is a reconciliation of the Company’s final capping, closure and post-closure liability balance from December 31, 2022 to March 31, 2023: ​ ​ ​ ​ ​ Final capping, closure and post-closure liability at December 31, 2022 $ 344,606 Liability adjustments ​ 14,704 Accretion expense associated with landfill obligations ​ 4,474 Closure payments ​ (5,346) Assumption of closure liabilities from acquisitions ​ ​ 3,443 Foreign currency translation adjustment ​ 24 Final capping, closure and post-closure liability at March 31, 2023 ​ $ 361,905	The following is a reconciliation of the Company’s final capping, closure and post-closure liability balance from December 31, 2020 to December 31, 2022: ​ ​ ​ ​ ​ Final capping, closure and post-closure liability at December 31, 2020 $ 301,896 Liability adjustments ​ (1,081) Accretion expense associated with landfill obligations ​ 14,333 Closure payments ​ (21,040) Assumption of closure liabilities from acquisitions ​ 11,380 Disposition of closure liabilities from divested operations ​ ​ (3,566) Foreign currency translation adjustment ​ ​ 615 Final capping, closure and post-closure liability at December 31, 2021 ​ 302,537 Liability adjustments ​ 39,321 Accretion expense associated with landfill obligations ​ 16,068 Closure payments ​ (18,834) Assumption of closure liabilities from acquisitions ​ ​ 8,575 Disposition of closure liabilities from divested operations ​ ​ (916) Foreign currency translation adjustment ​ (2,145) Final capping, closure and post-closure liability at December 31, 2022 ​ $ 344,606

Acquisitions (Tables)

Acquisitions (Tables)	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Acquisitions [Abstract]
Summary of Consideration Transferred to Acquire Businesses and Amounts of Identifiable Assets Acquired, Liabilities Assumed and Noncontrolling Interests	​ ​ ​ ​ ​ ​ ​ ​ ​ 2023 2022 ​ ​ Acquisitions ​ Acquisitions Fair value of consideration transferred: ​ ​ Cash ​ $ 144,611 ​ $ 355,212 Debt assumed ​ 17,097 ​ — ​ ​ 161,708 ​ 355,212 ​ ​ ​ ​ ​ ​ ​ Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired: ​ ​ ​ ​ Accounts receivable ​ 3,882 ​ 9,211 Prepaid expenses and other current assets ​ 2,290 ​ 2,059 Restricted investments ​ ​ 5,462 ​ ​ — Operating lease right-of-use assets ​ ​ 587 ​ ​ 1,715 Property and equipment ​ 67,201 ​ 89,565 Long-term franchise agreements and contracts ​ 58,630 ​ 4,994 Customer lists ​ 1,527 ​ 38,944 Permits and other intangibles ​ ​ 2,403 ​ ​ 34,245 Accounts payable and accrued liabilities ​ (4,159) ​ (20,382) Current portion of operating lease liabilities ​ ​ (53) ​ ​ (830) Deferred revenue ​ (761) ​ (3,077) Contingent consideration ​ (6,000) ​ (5,000) Long-term portion of operating lease liabilities ​ ​ (534) ​ ​ (885) Other long-term liabilities ​ (4,543) ​ (631) Deferred income taxes ​ (1,077) ​ (9,317) Total identifiable net assets ​ 124,855 ​ 140,611 Goodwill ​ $ 36,853 ​ $ 214,601	The following table summarizes the consideration transferred to acquire these businesses and the amounts of identifiable assets acquired and liabilities assumed at the acquisition dates for the acquisitions consummated in the years ended December 31, 2022, 2021 and 2020: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2022 2021 2020 ​ ​ Acquisitions ​ Acquisitions ​ Acquisitions Fair value of consideration transferred: ​ ​ ​ Cash ​ $ 2,206,901 ​ $ 960,449 ​ $ 388,789 Debt assumed ​ 127,136 ​ 108,345 ​ 91,349 Change in open working capital settlements at year end ​ ​ — ​ ​ — ​ ​ 1,505 ​ ​ 2,334,037 ​ 1,068,794 ​ 481,643 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired: ​ ​ ​ ​ ​ Accounts receivable ​ 49,696 ​ 33,236 ​ 13,759 Prepaid expenses and other current assets ​ 9,428 ​ 4,866 ​ 4,509 Restricted investments ​ ​ 7,469 ​ ​ — ​ ​ — Operating lease right-of-use assets ​ ​ 4,707 ​ ​ 5,972 ​ ​ 5,247 Property and equipment ​ 1,073,155 ​ 394,687 ​ 173,394 Long-term franchise agreements and contracts ​ 239,866 ​ 134,827 ​ 59,149 Indefinite-lived intangibles ​ — ​ 9,557 ​ 13,465 Customer lists ​ 74,940 ​ 75,612 ​ 48,512 Permits and other intangibles ​ ​ 187,107 ​ ​ 116,967 ​ ​ 10,507 Other assets ​ 243 ​ 77 ​ 389 Accounts payable and accrued liabilities ​ (56,633) ​ (37,827) ​ (14,174) Current portion of operating lease liabilities ​ ​ (1,546) ​ ​ (1,370) ​ ​ (509) Deferred revenue ​ (10,761) ​ (8,389) ​ (1,821) Contingent consideration ​ (6,642) ​ (31,616) ​ (4,688) Long-term portion of operating lease liabilities ​ ​ (3,161) ​ ​ (4,602) ​ ​ (4,738) Other long-term liabilities ​ (6,915) ​ (13,976) ​ (2,136) Deferred income taxes ​ (51,507) ​ (63,822) ​ (4,525) Total identifiable net assets ​ 1,509,446 ​ 614,199 ​ 296,340 Goodwill ​ $ 824,591 ​ $ 454,595 ​ $ 185,303

Intangible Assets, Net (Tables)

Intangible Assets, Net (Tables)	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Intangible Assets, Net [Abstract]
Intangible Assets Exclusive of Goodwill	Intangible assets, exclusive of goodwill, consisted of the following at March 31, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross ​ ​ Accumulated Net ​ ​ Carrying ​ Accumulated ​ Impairment ​ Carrying ​ ​ Amount ​ Amortization ​ Loss ​ Amount Finite-lived intangible assets: ​ ​ ​ ​ Long-term franchise agreements and contracts ​ $ 975,058 ​ $ (312,988) ​ $ — ​ $ 662,070 Customer lists ​ 778,352 ​ (545,232) ​ — ​ 233,120 Permits and other ​ 782,166 ​ (120,992) ​ (40,784) ​ 620,390 ​ ​ 2,535,576 ​ (979,212) ​ (40,784) ​ 1,515,580 Indefinite-lived intangible assets: ​ ​ ​ ​ Solid waste collection and transportation permits ​ 181,613 ​ — ​ — ​ 181,613 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Intangible assets, exclusive of goodwill ​ $ 2,717,189 ​ $ (979,212) ​ $ (40,784) ​ $ 1,697,193 Intangible assets, exclusive of goodwill, consisted of the following at December 31, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross ​ ​ Accumulated Net ​ ​ Carrying ​ Accumulated ​ Impairment ​ Carrying ​ ​ Amount ​ Amortization ​ Loss ​ Amount Finite-lived intangible assets: ​ ​ ​ ​ Long-term franchise agreements and contracts ​ $ 916,582 ​ $ (297,382) ​ $ — ​ $ 619,200 Customer lists ​ 776,719 ​ (527,425) ​ — ​ 249,294 Permits and other ​ 779,689 ​ (115,095) ​ (40,784) ​ 623,810 ​ ​ 2,472,990 ​ (939,902) ​ (40,784) ​ 1,492,304 Indefinite-lived intangible assets: ​ ​ ​ ​ Solid waste collection and transportation permits ​ 181,613 ​ — ​ — ​ 181,613 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Intangible assets, exclusive of goodwill ​ $ 2,654,603 ​ $ (939,902) ​ $ (40,784) ​ $ 1,673,917	Intangible assets, exclusive of goodwill, consisted of the following at December 31, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross ​ ​ Accumulated Net ​ ​ Carrying ​ Accumulated ​ Impairment ​ Carrying ​ ​ Amount ​ Amortization ​ Loss ​ Amount Finite-lived intangible assets: ​ ​ ​ ​ Long-term franchise agreements and contracts ​ $ 916,582 ​ $ (297,382) ​ $ — ​ $ 619,200 Customer lists ​ 776,719 ​ (527,425) ​ — ​ 249,294 Permits and other ​ 779,689 ​ (115,095) ​ (40,784) ​ 623,810 ​ ​ 2,472,990 ​ (939,902) ​ (40,784) ​ 1,492,304 Indefinite-lived intangible assets: ​ ​ ​ ​ Solid waste collection and transportation permits ​ 181,613 ​ — ​ — ​ 181,613 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Intangible assets, exclusive of goodwill ​ $ 2,654,603 ​ $ (939,902) ​ $ (40,784) ​ $ 1,673,917 Intangible assets, exclusive of goodwill, consisted of the following at December 31, 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross ​ ​ Accumulated Net ​ ​ Carrying ​ Accumulated ​ Impairment ​ Carrying ​ ​ Amount ​ Amortization ​ Loss ​ Amount Finite-lived intangible assets: ​ ​ ​ ​ Long-term franchise agreements and contracts ​ $ 724,128 ​ $ (278,827) ​ $ — ​ $ 445,301 Customer lists ​ 711,047 ​ (450,109) ​ — ​ 260,938 Permits and other ​ 598,336 ​ (94,807) ​ (40,784) ​ 462,745 ​ ​ 2,033,511 ​ (823,743) ​ (40,784) ​ 1,168,984 Indefinite-lived intangible assets: ​ ​ ​ ​ Solid waste collection and transportation permits ​ 181,613 ​ — ​ — ​ 181,613 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Intangible assets, exclusive of goodwill ​ $ 2,215,124 ​ $ (823,743) ​ $ (40,784) ​ $ 1,350,597
Estimated Future Amortization Expense of Amortizable Intangible Assets	Estimated future amortization expense for the next five years relating to finite-lived intangible assets owned as of March 31, 2023 is as follows: ​ ​ ​ ​ ​ For the year ending December 31, 2023 $ 156,320 For the year ending December 31, 2024 ​ $ 141,755 For the year ending December 31, 2025 ​ $ 124,919 For the year ending December 31, 2026 ​ $ 109,325 For the year ending December 31, 2027 ​ $ 95,730	Estimated future amortization expense for the next five years relating to finite-lived intangible assets is as follows: ​ ​ ​ ​ ​ For the year ending December 31, 2023 $ 153,457 For the year ending December 31, 2024 ​ $ 135,884 For the year ending December 31, 2025 ​ $ 119,071 For the year ending December 31, 2026 ​ $ 103,541 For the year ending December 31, 2027 ​ $ 89,959

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2022
Lessee Disclosure [Abstract]
Summary of lease cost for operating and finance leases	Lease cost for operating and finance leases for the years ended December 31, 2022, 2021 and 2020 were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ ​ 2022 ​ 2021 ​ 2020 Operating lease cost ​ $ 41,891 ​ $ 40,381 ​ $ 39,411 Finance lease cost: ​ ​ ​ ​ ​ ​ ​ ​ ​ Amortization of leased assets ​ ​ 2,484 ​ ​ 3,424 ​ ​ — Interest on leased liabilities ​ ​ 219 ​ ​ 152 ​ ​ — Total lease cost ​ $ 44,594 ​ $ 43,957 ​ $ 39,411 ​ Supplemental cash flow information and non-cash activity related to the Company’s leases are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ ​ 2022 ​ ​ 2021 ​ ​ 2020 Cash paid for amounts included in the measurement of lease liabilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ Operating cash flows from operating leases ​ $ 40,782 ​ $ 40,249 ​ $ 39,212 Operating cash flows from finance leases ​ $ 219 ​ $ 152 ​ $ — Financing cash flows from finance leases ​ $ 5,560 ​ $ 3,133 ​ $ — Non-cash activity: ​ ​ ​ ​ ​ ​ ​ ​ ​ Right-of-use assets obtained in exchange for lease liabilities - operating leases ​ $ 63,648 ​ $ 17,933 ​ $ 15,117 Right-of-use assets obtained in exchange for lease liabilities - finance leases ​ $ 3,369 ​ $ 10,012 ​ $ 3,754 ​ Weighted-average remaining lease term and discount rate for the Company’s leases are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ 2022 ​ 2021 ​ 2020 Weighted average remaining lease term - operating leases ​ 8.9 years 8.0 years 8.6 years Weighted average remaining lease term - finance leases ​ 4.2 years ​ 4.9 years ​ 5.4 years Weighted average discount rate - operating leases ​ 2.93 % 3.37 % 3.86 % Weighted average discount rate - finance leases ​ 1.96 % ​ 1.89 % ​ 1.89 %
Summary of future minimum lease payments, operating leases	As of December 31, 2022, future minimum lease payments, reconciled to the respective lease liabilities, are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Operating Leases ​ ​ Finance Leases 2023 $ 40,499 ​ $ 2,906 2024 ​ 32,521 ​ 2,905 2025 ​ 26,869 ​ 2,905 2026 ​ 22,317 ​ 2,320 2027 ​ 19,528 ​ 898 Thereafter ​ 89,050 ​ — Minimum lease payments ​ 230,784 ​ 11,934 Less: imputed interest ​ (30,152) ​ (470) Present value of minimum lease payments ​ ​ 200,632 ​ ​ 11,464 Less: current portion of lease liabilities ​ ​ (35,170) ​ ​ (2,695) Long-term portion of lease liabilities ​ $ 165,462 ​ $ 8,769
Summary of future minimum lease payments, finance leases	As of December 31, 2022, future minimum lease payments, reconciled to the respective lease liabilities, are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Operating Leases ​ ​ Finance Leases 2023 $ 40,499 ​ $ 2,906 2024 ​ 32,521 ​ 2,905 2025 ​ 26,869 ​ 2,905 2026 ​ 22,317 ​ 2,320 2027 ​ 19,528 ​ 898 Thereafter ​ 89,050 ​ — Minimum lease payments ​ 230,784 ​ 11,934 Less: imputed interest ​ (30,152) ​ (470) Present value of minimum lease payments ​ ​ 200,632 ​ ​ 11,464 Less: current portion of lease liabilities ​ ​ (35,170) ​ ​ (2,695) Long-term portion of lease liabilities ​ $ 165,462 ​ $ 8,769

Long-Term Debt (Tables)

Long-Term Debt (Tables)	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Long-Term Debt	The following table presents the Company’s long-term debt at March 31, 2023 and December 31, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, ​ December 31, ​ ​ 2023 2022 Revolver under Credit Agreement, bearing interest ranging from 5.77% to 5.92% (a) ​ $ 650,587 ​ $ 614,705 ​ Term loan under Credit Agreement, bearing interest at 5.77% (a) ​ 650,000 ​ 650,000 ​ Term loan under Term Loan Agreement, bearing interest at 5.78% (a) ​ ​ 800,000 ​ ​ 800,000 ​ 4.25% Senior Notes due 2028 ​ ​ 500,000 ​ ​ 500,000 ​ 3.50% Senior Notes due 2029 ​ ​ 500,000 ​ ​ 500,000 ​ 2.60% Senior Notes due 2030 ​ ​ 600,000 ​ ​ 600,000 ​ 2.20% Senior Notes due 2032 ​ ​ 650,000 ​ ​ 650,000 ​ 3.20% Senior Notes due 2032 ​ ​ 500,000 ​ ​ 500,000 ​ 4.20% Senior Notes due 2033 ​ ​ 750,000 ​ ​ 750,000 ​ 3.05% Senior Notes due 2050 ​ ​ 500,000 ​ ​ 500,000 ​ 2.95% Senior Notes due 2052 ​ ​ 850,000 ​ ​ 850,000 ​ Notes payable to sellers and other third parties, bearing interest ranging from 2.42% to 10.35%, principal and interest payments due periodically with due dates ranging from 2024 to 2036 (a) ​ 36,049 ​ 37,232 ​ Finance leases, bearing interest ranging from 1.89% to 2.16%, with lease expiration dates ranging from 2026 to 2027 (a) ​ ​ 10,791 ​ ​ 11,464 ​ ​ ​ 6,997,427 ​ 6,963,401 ​ Less – current portion ​ (10,513) ​ (6,759) ​ Less – unamortized debt discount and issuance costs ​ (65,075) ​ (66,493) ​ Long-term portion of debt and notes payable ​ $ 6,921,839 ​ $ 6,890,149 ​ ____________________ (a) Interest rates represent the interest rates at March 31, 2023.	The following table presents the Company’s long-term debt as of December 31, 2022 and 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ December 31, ​ ​ 2022 2021 Revolver under Credit Agreement, bearing interest ranging from 5.42% to 5.74% (a) ​ $ 614,705 ​ $ 803,944 ​ Term loan under Credit Agreement, bearing interest at 5.42% (a) ​ 650,000 ​ 650,000 ​ Term loan under Term Loan Agreement, bearing interest at 5.42% (a), (b) ​ ​ 800,000 ​ ​ — ​ 4.25% Senior Notes due 2028 ​ ​ 500,000 ​ ​ 500,000 ​ 3.50% Senior Notes due 2029 ​ ​ 500,000 ​ ​ 500,000 ​ 2.60% Senior Notes due 2030 ​ ​ 600,000 ​ ​ 600,000 ​ 2.20% Senior Notes due 2032 ​ ​ 650,000 ​ ​ 650,000 ​ 3.20% Senior Notes due 2032 ​ ​ 500,000 ​ ​ — ​ 4.20% Senior Notes due 2033 ​ ​ 750,000 ​ ​ — ​ 3.05% Senior Notes due 2050 ​ ​ 500,000 ​ ​ 500,000 ​ 2.95% Senior Notes due 2052 ​ ​ 850,000 ​ ​ 850,000 ​ Notes payable to sellers and other third parties, bearing interest ranging from 2.42% to 10.35%, principal and interest payments due periodically with due dates ranging from 2024 to 2036 (a) ​ 37,232 ​ 37,508 ​ Finance leases, bearing interest ranging from 1.89% to 2.16%, with lease expiration dates ranging from 2026 to 2027 (a) ​ ​ 11,464 ​ ​ 10,519 ​ ​ ​ 6,963,401 ​ 5,101,971 ​ Less – current portion ​ (6,759) ​ (6,020) ​ Less – unamortized debt discount and issuance costs ​ (66,493) ​ (55,451) ​ ​ ​ $ 6,890,149 ​ $ 5,040,500 ​ (a) Interest rates represent the interest rates incurred at December 31, 2022. (b) Interest rate margin for term loan under Term Loan Agreement was 1.00% at December 31, 2022.
Details of the Company's Credit Agreement	Details of the Credit Agreement are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, ​ December 31, ​ ​ 2023 2022 Revolver under Credit Agreement ​ ​ ​ Available ​ $ 1,159,902 ​ $ 1,193,502 ​ ​ Letters of credit outstanding ​ $ 39,511 ​ $ 41,793 ​ ​ Total amount drawn, as follows: ​ $ 650,587 ​ $ 614,705 ​ ​ Amount drawn – U.S. Term SOFR rate loan ​ $ 280,000 ​ $ 391,000 ​ ​ Interest rate applicable – U.S. Term SOFR rate loan ​ ​ 5.77 % ​ 5.42 % ​ Amount drawn – U.S. Term SOFR rate loan ​ $ 100,000 ​ $ — ​ ​ Interest rate applicable – U.S. Term SOFR rate loan ​ ​ 5.78 % ​ — % ​ Amount drawn – U.S. Term SOFR rate loan ​ $ 60,000 ​ $ — ​ ​ Interest rate applicable – U.S. Term SOFR rate loan ​ ​ 5.91 % ​ — % ​ Amount drawn – Canadian bankers’ acceptance ​ $ 210,587 ​ $ 223,705 ​ ​ Interest rate applicable – Canadian bankers’ acceptance ​ 5.92 % 5.74 % ​ Commitment – rate applicable ​ 0.09 % 0.09 % ​ Term loan under Credit Agreement ​ ​ ​ ​ ​ ​ Amount drawn – U.S. Term SOFR rate loan ​ $ 650,000 ​ $ 650,000 ​ ​ Interest rate applicable – U.S. Term SOFR rate loan ​ ​ 5.77 % ​ 5.42 % ​	Details of the Credit Agreement are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2022 2021 Revolver under Credit Agreement ​ ​ ​ Available ​ $ 1,193,502 ​ $ 933,775 ​ Letters of credit outstanding ​ $ 41,793 ​ $ 112,281 ​ Total amount drawn, as follows: ​ $ 614,705 ​ $ 803,944 ​ Amount drawn – U.S. Term SOFR rate loan ​ $ 391,000 ​ ​ Not applicable ​ Interest rate applicable – U.S. Term SOFR rate loan ​ ​ 5.42 % ​ Not applicable ​ Interest rate margin – U.S. Term SOFR rate loan ​ ​ 1.00 % ​ Not applicable ​ Amount drawn – U.S. LIBOR rate loan ​ ​ Not applicable ​ $ 631,000 ​ Interest rate applicable – U.S. LIBOR rate loan ​ ​ Not applicable ​ ​ 1.10 % Interest rate margin – U.S. LIBOR rate loan ​ ​ Not applicable ​ ​ 1.00 % Amount drawn – U.S. base rate loan ​ $ — ​ $ 158,000 ​ Interest rate applicable – U.S. base rate loan ​ ​ — % ​ 3.25 % Interest rate margin – U.S. base rate loan ​ ​ — % ​ 0.00 % Amount drawn – U.S. swingline loan ​ $ — ​ $ 11,000 ​ Interest rate applicable – U.S. swingline loan ​ ​ — % ​ 3.25 % Interest rate margin – U.S. swingline loan ​ ​ — % ​ 0.00 % Amount drawn – Canadian bankers’ acceptance ​ $ 223,705 ​ $ 3,944 ​ Interest rate applicable – Canadian bankers’ acceptance ​ 5.74 % 1.45 % Interest rate acceptance fee – Canadian bankers’ acceptance ​ 1.00 % 1.00 % Commitment – rate applicable ​ 0.09 % 0.09 % Term loan under Credit Agreement ​ ​ ​ ​ ​ Amount drawn – U.S. Term SOFR rate loan ​ $ 650,000 ​ ​ Not applicable ​ Interest rate applicable – U.S. Term SOFR rate loan ​ ​ 5.42 % ​ Not applicable ​ Interest rate margin – U.S. Term SOFR rate loan ​ ​ 1.00 % ​ Not applicable ​ Amount drawn – U.S. based LIBOR loan ​ ​ Not applicable ​ $ 650,000 ​ Interest rate applicable – U.S. based LIBOR loan ​ ​ Not applicable ​ 1.10 % Interest rate margin – U.S. based LIBOR loan ​ ​ Not applicable ​ 1.20 %
Aggregate Contractual Future Principal Payments by Calendar Year on Long-Term Debt		As of December 31, 2022, aggregate contractual future principal payments by calendar year on long-term debt are due as follows: ​ ​ ​ ​ ​ 2023 $ 6,759 2024 ​ 10,636 2025 ​ 7,112 2026 ​ 2,071,152 2027 ​ 5,179 Thereafter ​ 4,862,563 ​ ​ $ 6,963,401

Segment Reporting (Tables)

Segment Reporting (Tables)	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Segment Reporting [Abstract]
Summary of Financial Information Concerning Company's Reportable Segments	Summarized financial information concerning the Company’s reportable segments for the three months ended March 31, 2023 and 2022, is shown in the following tables: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ Intercompany Reported Segment March 31, 2023 ​ Revenue ​ Revenue (b) ​ Revenue ​ EBITDA (c) Southern ​ $ 451,000 ​ $ (51,107) ​ $ 399,893 ​ $ 121,914 Western ​ 444,796 ​ (48,957) ​ 395,839 ​ 110,689 Central ​ 383,525 ​ (43,540) ​ 339,985 ​ 115,756 Eastern ​ ​ 388,797 ​ ​ (59,669) ​ ​ 329,128 ​ ​ 73,275 Canada ​ 253,670 ​ (26,514) ​ 227,156 ​ 82,984 MidSouth ​ 251,085 ​ (42,583) ​ 208,502 ​ 57,731 Corporate (a) ​ — ​ — ​ — ​ (2,454) ​ ​ $ 2,172,873 ​ $ (272,370) ​ $ 1,900,503 ​ $ 559,895 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ Intercompany Reported Segment March 31, 2022 ​ Revenue ​ Revenue (b) ​ Revenue ​ EBITDA (c) Southern ​ $ 385,636 ​ $ (39,570) ​ $ 346,066 ​ $ 101,124 Western ​ 376,538 ​ (42,879) ​ 333,659 ​ 100,000 Central ​ 322,998 ​ (32,936) ​ 290,062 ​ 96,951 Eastern ​ ​ 315,967 ​ ​ (45,165) ​ ​ 270,802 ​ ​ 65,287 Canada ​ 240,215 ​ (25,508) ​ 214,707 ​ 84,844 MidSouth ​ 228,162 ​ (37,203) ​ 190,959 ​ 49,819 Corporate (a) ​ — ​ — ​ — ​ (4,702) ​ ​ $ 1,869,516 ​ $ (223,261) ​ $ 1,646,255 ​ $ 493,323 ____________________ (a) The majority of Corporate expenses are allocated to the six operating segments. Direct acquisition expenses, expenses associated with common shares held in the deferred compensation plan exchanged for other investment options and share-based compensation expenses associated with Progressive Waste share-based grants outstanding at June 1, 2016 that were continued by the Company are not allocated to the six operating segments and comprise the net EBITDA of the Company’s Corporate segment for the periods presented. (b) Intercompany revenues reflect each segment’s total intercompany sales, including intercompany sales within a segment and between segments. Transactions within and between segments are generally made on a basis intended to reflect the market value of the service. (c) For those items included in the determination of segment EBITDA, the accounting policies of the segments are the same as those described in the Company’s most recent Annual Report on Form 10-K.	Summarized financial information concerning the Company’s reportable segments for the years ended December 31, 2022, 2021 and 2020, is shown in the following tables: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended ​ ​ ​ ​ Intercompany ​ Reported ​ Segment ​ Depreciation and ​ Capital ​ ​ ​ December 31, 2022 Revenue Revenue (b) Revenue EBITDA (c) Amortization Expenditures Total Assets (e) Southern ​ $ 1,670,864 ​ $ (176,425) ​ $ 1,494,439 ​ $ 466,519 ​ $ 175,614 ​ $ 151,093 ​ $ 3,410,888 Western ​ 1,605,574 ​ (177,543) ​ 1,428,031 ​ 424,935 ​ 155,882 ​ 232,714 ​ 3,239,679 Central ​ 1,447,703 ​ (159,355) ​ 1,288,348 ​ 446,315 ​ 156,895 ​ 181,065 ​ 2,803,853 Eastern ​ ​ 1,445,193 ​ ​ (211,498) ​ ​ 1,233,695 ​ ​ 281,522 ​ ​ 190,480 ​ ​ 138,028 ​ ​ 2,752,436 Canada ​ 1,047,672 ​ (107,048) ​ 940,624 ​ 349,403 ​ 118,388 ​ 70,051 ​ 2,773,882 MidSouth ​ 992,922 ​ (166,200) ​ 826,722 ​ 235,705 ​ 112,866 ​ 133,849 ​ 1,727,323 Corporate (a), (d) ​ — ​ — ​ — ​ (25,019) ​ 8,835 ​ 5,877 ​ 426,542 ​ ​ $ 8,209,928 ​ $ (998,069) ​ $ 7,211,859 ​ $ 2,179,380 ​ $ 918,960 ​ $ 912,677 ​ $ 17,134,603 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended ​ ​ ​ ​ Intercompany ​ Reported ​ Segment ​ Depreciation and ​ Capital ​ ​ ​ December 31, 2021 Revenue Revenue (b) Revenue EBITDA (c) Amortization Expenditures Total Assets (e) Southern ​ $ 1,493,588 ​ $ (172,526) ​ $ 1,321,062 ​ $ 369,221 ​ $ 173,235 ​ $ 139,258 ​ $ 3,154,940 Western ​ 1,383,124 ​ (154,498) ​ 1,228,626 ​ 386,513 ​ 126,192 ​ 147,556 ​ 2,168,804 Central ​ 1,243,666 ​ (142,261) ​ 1,101,405 ​ 379,644 ​ 138,683 ​ 149,360 ​ 2,429,811 Eastern ​ 1,111,546 ​ ​ (155,836) ​ ​ 955,710 ​ ​ 245,091 ​ ​ 156,499 ​ ​ 90,212 ​ ​ 2,314,663 Canada ​ 965,705 ​ (108,982) ​ 856,723 ​ 339,859 ​ 111,458 ​ 68,183 ​ 2,513,608 MidSouth ​ 832,386 ​ (144,551) ​ ​ 687,835 ​ ​ 184,218 ​ 97,564 ​ 101,098 ​ 1,690,234 Corporate (a), (d) ​ — ​ — ​ — ​ (19,596) ​ 9,378 ​ 48,648 ​ 427,864 ​ ​ $ 7,030,015 ​ $ (878,654) ​ $ 6,151,361 ​ $ 1,884,950 ​ $ 813,009 ​ $ 744,315 ​ $ 14,699,924 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended ​ ​ ​ ​ Intercompany ​ Reported ​ Segment ​ Depreciation and ​ Capital ​ ​ ​ December 31, 2020 Revenue Revenue (b) Revenue EBITDA (c) Amortization Expenditures Total Assets (e) Southern ​ $ 1,419,987 ​ $ (169,817) ​ $ 1,250,170 ​ $ 343,181 ​ $ 173,885 ​ $ 125,972 ​ $ 3,193,211 Western ​ 1,244,745 ​ (141,993) ​ 1,102,752 ​ 346,585 ​ 111,515 ​ 126,370 ​ 1,770,403 Central ​ 1,058,909 ​ (127,885) ​ 931,024 ​ 332,321 ​ 117,499 ​ 109,013 ​ 2,256,992 Eastern ​ 969,011 ​ ​ (142,927) ​ ​ 826,084 ​ ​ 196,068 ​ ​ 143,744 ​ ​ 111,912 ​ ​ 1,908,333 Canada ​ 805,757 ​ (95,297) ​ 710,460 ​ 256,119 ​ 103,334 ​ 109,886 ​ 2,544,379 MidSouth ​ 761,978 ​ (136,478) ​ ​ 625,500 ​ ​ 172,559 ​ 94,172 ​ 75,661 ​ 1,428,929 Corporate (a), (d) ​ — ​ — ​ — ​ (15,283) ​ 8,255 ​ 5,747 ​ 890,117 ​ ​ $ 6,260,387 ​ $ (814,397) ​ $ 5,445,990 ​ $ 1,631,550 ​ $ 752,404 ​ $ 664,561 ​ $ 13,992,364 (a) The majority of Corporate expenses are allocated to the six operating segments. Direct acquisition expenses, expenses associated with common shares held in the deferred compensation plan exchanged for other investment options and share-based compensation expenses associated with Progressive Waste share-based grants outstanding at June 1, 2016 that were continued by the Company are not allocated to the six operating segments and comprise the net EBITDA of the Company’s Corporate segment for the periods presented. (b) Intercompany revenues reflect each segment’s total intercompany sales, including intercompany sales within a segment and between segments. Transactions within and between segments are generally made on a basis intended to reflect the market value of the service. (c) For those items included in the determination of segment EBITDA, the accounting policies of the segments are the same as those described in Note 3. (d) Corporate assets include cash, debt issuance costs, equity investments, operating lease right-of-use assets and corporate facility leasehold improvements and equipment. (e) Goodwill is included within total assets for each of the Company’s six operating segments.
Changes in Goodwill by Reportable Segment	The following tables show changes in goodwill during the three months ended March 31, 2023 and 2022, by reportable segment: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Southern Western Central Eastern Canada MidSouth Total Balance as of December 31, 2022 ​ $ 1,547,894 ​ $ 732,335 ​ $ 1,003,470 ​ $ 1,189,111 ​ $ 1,684,670 ​ $ 744,817 ​ $ 6,902,297 Goodwill acquired ​ ​ — ​ ​ 30,703 ​ ​ 397 ​ 3,440 ​ ​ — ​ ​ 3,249 ​ 37,789 Goodwill acquisition adjustments ​ ​ (647) ​ ​ — ​ ​ — ​ ​ — ​ ​ (289) ​ ​ — ​ ​ (936) Impact of changes in foreign currency ​ — ​ — ​ — ​ — ​ 1,417 ​ — ​ 1,417 Balance as of March 31, 2023 ​ $ 1,547,247 ​ $ 763,038 ​ $ 1,003,867 ​ $ 1,192,551 ​ $ 1,685,798 ​ $ 748,066 ​ $ 6,940,567 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Southern Western Central Eastern Canada MidSouth Total Balance as of December 31, 2021 ​ $ 1,457,437 ​ $ 503,223 ​ $ 931,269 ​ $ 992,578 ​ $ 1,559,512 ​ $ 743,624 ​ $ 6,187,643 Goodwill acquired ​ ​ — ​ ​ — ​ ​ 2,794 ​ 85,866 ​ ​ 123,384 ​ — ​ 212,044 Goodwill acquisition adjustments ​ ​ — ​ ​ 2,652 ​ ​ — ​ ​ — ​ ​ — ​ ​ (95) ​ ​ 2,557 Impact of changes in foreign currency ​ — ​ — ​ — ​ — ​ ​ 25,519 ​ — ​ 25,519 Balance as of March 31, 2022 ​ $ 1,457,437 ​ $ 505,875 ​ $ 934,063 ​ $ 1,078,444 ​ $ 1,708,415 ​ $ 743,529 ​ $ 6,427,763	The following table shows changes in goodwill during the years ended December 31, 2021 and 2022, by reportable segment: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Southern Western Central Eastern Canada MidSouth Total Balance as of December 31, 2020 ​ $ 1,532,215 ​ $ 442,862 ​ $ 824,204 ​ $ 1,374,577 ​ $ 1,552,792 ​ $ — ​ $ 5,726,650 Goodwill transferred (a) ​ ​ (77,430) ​ ​ (36,486) ​ ​ 39,037 ​ ​ (557,353) ​ ​ — ​ ​ 632,232 ​ ​ — Goodwill acquired ​ 2,976 ​ 96,847 ​ 68,028 ​ 175,354 ​ — ​ 111,392 ​ 454,597 Goodwill acquisition adjustments ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ (2) ​ ​ — ​ ​ (2) Goodwill divested ​ ​ (324) ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ (324) Impact of changes in foreign currency ​ — ​ — ​ — ​ — ​ 6,722 ​ — ​ 6,722 Balance as of December 31, 2021 ​ ​ 1,457,437 ​ ​ 503,223 ​ ​ 931,269 ​ ​ 992,578 ​ ​ 1,559,512 ​ ​ 743,624 ​ ​ 6,187,643 Goodwill acquired ​ ​ 90,457 ​ ​ 229,112 ​ ​ 72,201 ​ 196,533 ​ ​ 235,095 ​ ​ 1,193 ​ 824,591 Impact of changes in foreign currency ​ — ​ — ​ — ​ — ​ (109,937) ​ — ​ (109,937) Balance as of December 31, 2022 ​ $ 1,547,894 ​ $ 732,335 ​ $ 1,003,470 ​ $ 1,189,111 ​ $ 1,684,670 ​ $ 744,817 ​ $ 6,902,297
Total Assets for Reportable Segments		Property and equipment, net relating to operations in the United States and Canada are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2022 2021 United States ​ $ 6,201,011 ​ $ 5,075,184 Canada ​ 749,904 ​ 646,765 Total ​ $ 6,950,915 ​ $ 5,721,949
Reconciliation of Primary Measure of Segment Profitability to Income Before Income Tax Provision	A reconciliation of the Company’s primary measure of segment profitability (segment EBITDA) to Income before income tax provision in the Condensed Consolidated Statements of Net Income is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ March 31, ​ 2023 2022 Southern segment EBITDA ​ $ 121,914 ​ $ 101,124 Western segment EBITDA ​ ​ 110,689 ​ ​ 100,000 Central segment EBITDA ​ ​ 115,756 ​ ​ 96,951 Eastern segment EBITDA ​ ​ 73,275 ​ ​ 65,287 Canada segment EBITDA ​ ​ 82,984 ​ ​ 84,844 MidSouth segment EBITDA ​ 57,731 ​ 49,819 Subtotal reportable segments ​ 562,349 ​ 498,025 Unallocated corporate overhead ​ ​ (2,454) ​ ​ (4,702) Depreciation ​ ​ (204,059) ​ ​ (179,950) Amortization of intangibles ​ ​ (39,282) ​ ​ (37,635) Impairments and other operating items ​ ​ (1,865) ​ ​ (1,878) Interest expense ​ ​ (68,353) ​ ​ (41,324) Interest income ​ ​ 2,715 ​ ​ 137 Other income (expense), net ​ ​ 3,174 ​ ​ (3,466) Income before income tax provision ​ $ 252,225 ​ $ 229,207	A reconciliation of the Company’s primary measure of segment profitability (segment EBITDA) to Income before income tax provision in the Consolidated Statements of Net Income is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years ended December 31, ​ 2022 2021 2020 Southern segment EBITDA ​ $ 466,519 ​ $ 369,221 ​ $ 343,181 Western segment EBITDA ​ 424,935 ​ 386,513 ​ 346,585 Central segment EBITDA ​ 446,315 ​ 379,644 ​ 332,321 Eastern segment EBITDA ​ ​ 281,522 ​ ​ 245,091 ​ ​ 196,068 Canada segment EBITDA ​ 349,403 ​ 339,859 ​ 256,119 MidSouth segment EBITDA ​ 235,705 ​ 184,218 ​ 172,559 Subtotal reportable segments ​ 2,204,399 ​ 1,904,546 ​ 1,646,833 Unallocated corporate overhead ​ (25,019) ​ (19,596) ​ (15,283) Depreciation ​ (763,285) ​ (673,730) ​ (621,102) Amortization of intangibles ​ (155,675) ​ (139,279) ​ (131,302) Impairments and other operating items ​ (18,230) ​ (32,316) ​ (466,718) Interest expense ​ (202,331) ​ (162,796) ​ (162,375) Interest income ​ 5,950 ​ 2,916 ​ 5,253 Other income (expense), net ​ 3,154 ​ 6,285 ​ (1,392) Loss on early extinguishment of debt ​ ​ — ​ ​ (115,288) ​ ​ — Income before income tax provision ​ $ 1,048,963 ​ $ 770,742 ​ $ 253,914

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Fair Value of Derivative Instrument Designated as Cash Flow Hedges	The fair values of derivative instruments designated as cash flow hedges at March 31, 2023, were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives Designated as Cash ​ Asset Derivatives ​ Liability Derivatives Flow Hedges Balance Sheet Location Fair Value Balance Sheet Location Fair Value Interest rate swaps Prepaid expenses and other current assets (a) ​ $ 14,872 Accrued liabilities ​ $ — ​ Other assets, net ​ 9,555 ​ ​ ​ ​ Total derivatives designated as cash flow hedges ​ ​ ​ $ 24,427 ​ ​ ​ $ — ____________________ (a) Represents the estimated amount of the existing unrealized gains on interest rate swaps at March 31, 2023 (based on the interest rate yield curve at that date), included in AOCIL expected to be reclassified into pre-tax earnings within the next 12 months. The actual amounts reclassified into earnings are dependent on future movements in interest rates. The fair values of derivative instruments designated as cash flow hedges at December 31, 2022, were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives Designated as Cash ​ Asset Derivatives ​ Liability Derivatives Flow Hedges Balance Sheet Location Fair Value Balance Sheet Location Fair Value Interest rate swaps Prepaid expenses and other current assets ​ $ 17,906 Accrued liabilities ​ $ — ​ Other assets, net ​ 13,901 ​ ​ ​ Total derivatives designated as cash flow hedges ​ ​ ​ $ 31,807 ​ ​ ​ $ —	The fair values of derivative instruments designated as cash flow hedges as of December 31, 2022, were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives Designated as Cash ​ Asset Derivatives ​ Liability Derivatives Flow Hedges Balance Sheet Location Fair Value Balance Sheet Location Fair Value Interest rate swaps Prepaid expenses and other current assets (a) ​ $ 17,906 Accrued liabilities ​ $ — ​ Other assets, net ​ 13,901 ​ ​ ​ ​ Total derivatives designated as cash flow hedges ​ ​ ​ $ 31,807 ​ ​ ​ $ — (a) Represents the estimated amount of the existing unrealized gains on interest rate swaps as of December 31, 2022 (based on the interest rate yield curve at that date), included in AOCIL expected to be reclassified into pre-tax earnings within the next 12 months. The actual amounts reclassified into earnings are dependent on future movements in interest rates. The fair values of derivative instruments designated as cash flow hedges as of December 31, 2021, were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives Designated as Cash ​ Asset Derivatives ​ Liability Derivatives Flow Hedges Balance Sheet Location Fair Value Balance Sheet Location Fair Value Interest rate swaps Prepaid expenses and other current assets ​ $ — Accrued liabilities ​ $ (18,675) ​ ​ ​ ​ Other long-term liabilities ​ (32,406) Total derivatives designated as cash flow hedges ​ ​ ​ $ — ​ ​ ​ $ (51,081)
Impact of Cash Flow Hedges on Results of Operations, Comprehensive Income (Loss) and Accumulated Other Comprehensive Income (Loss)	The following table summarizes the impact of the Company’s cash flow hedges on the results of operations, comprehensive income (loss) and AOCIL for the three months ended March 31, 2023 and 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives ​ ​ ​ ​ ​ ​ ​ Statement of ​ Amount of (Gain) or Loss Reclassified Designated as Cash ​ Amount of Gain or (Loss) Recognized ​ Net Income ​ from AOCIL into Earnings, Flow Hedges ​ as AOCIL on Derivatives, Net of Tax (a) ​ Classification ​ Net of Tax (b) ​ ​ Three Months Ended ​ ​ ​ Three Months Ended ​ ​ March 31, ​ ​ ​ March 31, ​ 2023 2022 ​ 2023 2022 Interest rate swaps ​ $ (2,425) ​ $ 32,854 ​ Interest expense ​ $ (2,999) ​ $ 3,491 ​ ____________________ (a) In accordance with the derivatives and hedging guidance, the changes in fair values of interest rate swaps have been recorded in equity as a component of AOCIL. As the critical terms of the interest rate swaps match the underlying debt being hedged, all unrealized changes in fair value are recorded in AOCIL. (b) Amounts reclassified from AOCIL into earnings related to realized gains and losses on interest rate swaps are recognized when interest payments or receipts occur related to the swap contracts, which correspond to when interest payments are made on the Company’s hedged debt.	The following table summarizes the impact of the Company’s cash flow hedges on the results of operations, comprehensive income (loss) and AOCIL for the years ended December 31, 2022, 2021 and 2020: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives ​ ​ ​ Statement of ​ Amount of (Gain) or Loss Reclassified Designated as Cash ​ Amount of Gain or (Loss) Recognized ​ Net Income ​ from AOCIL into Earnings, Flow Hedges ​ as AOCIL on Derivatives, Net of Tax (a) ​ Classification ​ Net of Tax (b) ​ ​ Years Ended December 31, ​ ​ ​ Years Ended December 31, ​ 2022 2021 2020 ​ 2022 2021 2020 Interest rate swaps ​ $ 56,107 ​ $ 17,116 ​ $ (47,528) ​ Interest expense ​ $ 4,815 ​ $ 14,936 ​ $ 7,187 (a) In accordance with the derivatives and hedging guidance, the changes in fair values of interest rate swaps have been recorded in equity as a component of AOCIL. As the critical terms of the interest rate swaps match the underlying debt being hedged, all unrealized changes in fair value are recorded in AOCIL. (b) Amounts reclassified from AOCIL into earnings related to realized gains and losses on interest rate swaps are recognized when interest payments or receipts occur related to the swap contracts, which correspond to when interest payments are made on the Company’s hedged debt.
Interest Rate Swap [Member]
Company's Derivative Instruments	At March 31, 2023, the Company’s derivative instruments included four interest rate swap agreements as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fixed Variable ​ ​ ​ ​ Notional ​ Interest ​ Interest Rate ​ ​ ​ ​ Date Entered (a) ​ Amount ​ Rate Paid (b) ​ Received ​ Effective Date ​ Expiration Date August 2017 ​ $ 200,000 2.1230 % 1-month Term SOFR November 2022 October 2025 June 2018 ​ $ 200,000 2.8480 % 1-month Term SOFR November 2022 October 2025 June 2018 ​ $ 200,000 2.8284 % 1-month Term SOFR November 2022 October 2025 December 2018 ​ $ 200,000 2.7715 % 1-month Term SOFR November 2022 July 2027 ____________________ (a) In October 2022, the Company amended the reference rate in all of its outstanding interest rate swap contracts to replace One-Month LIBOR with One-Month Term SOFR and certain credit spread adjustments. The Company did not record any gains or losses upon the conversion of the reference rates in these interest rate swap contracts, and the Company believes these amendments will not have a material impact on its Condensed Consolidated Financial Statements. (b) Plus applicable margin.	At December 31, 2022, the Company’s derivative instruments included five interest rate swap agreements as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fixed Variable ​ ​ ​ ​ Notional ​ Interest ​ Interest Rate ​ ​ ​ Expiration Date Entered (b) ​ Amount ​ Rate Paid (a) ​ Received ​ Effective Date ​ Date August 2017 ​ $ 200,000 2.1230 % 1-month Term SOFR November 2022 October 2025 August 2017 ​ $ 150,000 1.7720 % 1-month Term SOFR November 2022 February 2023 June 2018 ​ $ 200,000 ​ 2.8480 % 1-month Term SOFR ​ November 2022 ​ October 2025 June 2018 ​ $ 200,000 ​ 2.8284 % 1-month Term SOFR ​ November 2022 ​ October 2025 December 2018 ​ $ 200,000 ​ 2.7715 % 1-month Term SOFR ​ November 2022 ​ July 2027 (a) Plus applicable margin. (b) In October 2022, the Company amended the reference rate in all of its outstanding interest rate swap contracts to replace One-Month LIBOR with One-Month Term SOFR and certain credit spread adjustments. The Company did not record any gains or losses upon the conversion of the reference rates in these interest rate swap contracts, and the Company believes these amendments will not have a material impact on its Consolidated Financial Statements.

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Fair Value [Abstract]
Carrying Values and Fair Values of Debt Instruments	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Carrying Value at ​ Fair Value (a) at ​ ​ March 31, ​ December 31, ​ March 31, ​ December 31, ​ 2023 2022 2023 2022 4.25% Senior Notes due 2028 ​ $ 500,000 ​ $ 500,000 ​ $ 491,500 ​ $ 470,850 3.50% Senior Notes due 2029 ​ $ 500,000 ​ $ 500,000 ​ $ 466,350 ​ $ 457,650 2.60% Senior Notes due 2030 ​ $ 600,000 ​ $ 600,000 ​ $ 525,060 ​ $ 510,540 2.20% Senior Notes due 2032 ​ $ 650,000 ​ $ 650,000 ​ $ 529,490 ​ $ 514,540 3.20% Senior Notes due 2032 ​ $ 500,000 ​ $ 500,000 ​ $ 444,800 ​ $ 429,000 4.20% Senior Notes due 2033 ​ $ 750,000 ​ $ 750,000 ​ $ 718,275 ​ $ 699,450 3.05% Senior Notes due 2050 ​ $ 500,000 ​ $ 500,000 ​ $ 341,300 ​ $ 343,300 2.95% Senior Notes due 2052 ​ $ 850,000 ​ $ 850,000 ​ $ 570,435 ​ $ 561,425 ____________________ *Senior Notes are classified as Level 2 within the fair value hierarchy. Fair value inputs include third-party calculations of the market interest rate of notes with similar ratings in similar industries over the remaining note terms.	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Carrying Value at ​ Fair Value (a) at ​ ​ December 31, ​ December 31, ​ December 31, ​ December 31, ​ 2022 2021 2022 2021 4.25% Senior Notes due 2028 ​ $ 500,000 ​ $ 500,000 ​ $ 470,850 ​ $ 561,350 3.50% Senior Notes due 2029 ​ $ 500,000 ​ $ 500,000 ​ $ 457,650 ​ $ 539,500 2.60% Senior Notes due 2030 ​ $ 600,000 ​ $ 600,000 ​ $ 510,540 ​ $ 610,440 2.20% Senior Notes due 2032 ​ $ 650,000 ​ $ 650,000 ​ $ 514,540 ​ $ 637,065 3.20% Senior Notes due 2032 ​ $ 500,000 ​ $ — ​ $ 429,000 ​ $ — 4.20% Senior Notes due 2033 ​ $ 750,000 ​ $ — ​ $ 699,450 ​ $ — 3.05% Senior Notes due 2050 ​ $ 500,000 ​ $ 500,000 ​ $ 343,300 ​ $ 496,350 2.95% Senior Notes due 2052 ​ $ 850,000 ​ $ 850,000 ​ $ 561,425 ​ $ 828,580 (a) Senior Notes are classified as Level 2 within the fair value hierarchy. Fair value inputs include third-party calculations of the market interest rate of notes with similar ratings in similar industries over the remaining note terms.

Net Income Per Share Informat_2

Net Income Per Share Information (Tables)	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Net Income Per Share Information [Abstract]
Basic and Diluted Net Income Per Common Share	The following table sets forth the calculation of the numerator and denominator used in the computation of basic and diluted net income per common share attributable to the Company’s shareholders for the three months ended March 31, 2023 and 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ ​ March 31, ​ ​ 2023 2022 Numerator: ​ ​ ​ ​ ​ ​ ​ Net income attributable to Waste Connections for basic and diluted earnings per share ​ $ 197,813 ​ $ 180,324 ​ Denominator: ​ ​ ​ ​ ​ Basic shares outstanding ​ ​ 257,372,942 ​ ​ 258,946,933 ​ Dilutive effect of equity-based awards ​ ​ 616,029 ​ ​ 614,050 ​ Diluted shares outstanding ​ 257,988,971 ​ 259,560,983 ​	The following table sets forth the calculation of the numerator and denominator used in the computation of basic and diluted net income per common share attributable to the Company’s shareholders for the years ended December 31, 2022, 2021 and 2020: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ 2022 2021 2020 Numerator: ​ ​ ​ ​ ​ ​ ​ ​ ​ Net income attributable to Waste Connections for basic and diluted earnings per share ​ $ 835,662 ​ $ 618,047 ​ $ 204,677 Denominator: ​ ​ ​ ​ ​ ​ Basic shares outstanding ​ 257,383,578 ​ 261,166,723 ​ 263,189,699 Dilutive effect of equity-based awards ​ 655,223 ​ 561,747 ​ 497,840 Diluted shares outstanding ​ 258,038,801 ​ 261,728,470 ​ 263,687,539

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Fair Value [Abstract]
Assets and Liabilities Measured at Fair Value on Recurring Basis	The Company’s assets and liabilities measured at fair value on a recurring basis at March 31, 2023 and December 31, 2022, were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurement at March 31, 2023 Using ​ ​ ​ Quoted Prices in Significant ​ ​ ​ ​ ​ ​ ​ Active Markets ​ Other ​ Significant ​ ​ ​ ​ ​ for Identical ​ Observable ​ Unobservable ​ ​ ​ ​ ​ Assets ​ Inputs ​ Inputs ​ ​ Total ​ (Level 1) ​ (Level 2) ​ (Level 3) Interest rate swap derivative instruments – net asset position ​ $ 24,427 ​ $ — ​ $ 24,427 ​ $ — Restricted cash ​ $ 106,625 ​ $ 106,625 ​ $ — ​ $ — Restricted investments ​ $ 72,784 ​ $ — ​ $ 72,784 ​ $ — Contingent consideration ​ $ (85,822) ​ $ — ​ $ — ​ $ (85,822) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurement at December 31, 2022 Using ​ ​ ​ Quoted Prices in Significant ​ ​ ​ ​ ​ ​ ​ Active Markets ​ Other ​ Significant ​ ​ ​ ​ ​ for Identical ​ Observable ​ Unobservable ​ ​ ​ ​ ​ Assets ​ Inputs ​ Inputs ​ ​ Total ​ (Level 1) ​ (Level 2) ​ (Level 3) Interest rate swap derivative instruments – net asset position ​ $ 31,807 ​ $ — ​ $ 31,807 ​ $ — Restricted cash ​ $ 102,727 ​ $ 102,727 ​ $ — ​ $ — Restricted investments ​ $ 66,402 ​ $ — ​ $ 66,402 ​ $ — Contingent consideration ​ $ (81,415) ​ $ — ​ $ — ​ $ (81,415)	The Company’s assets and liabilities measured at fair value on a recurring basis at December 31, 2022 and 2021, were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurement at December 31, 2022 Using ​ ​ ​ Quoted Prices in Significant ​ ​ ​ ​ ​ ​ ​ Active Markets ​ Other ​ Significant ​ ​ ​ ​ ​ for Identical ​ Observable ​ Unobservable ​ ​ ​ ​ ​ Assets ​ Inputs ​ Inputs ​ ​ Total ​ (Level 1) ​ (Level 2) ​ (Level 3) Interest rate swap derivative instruments – net asset position ​ $ 31,807 ​ $ — ​ $ 31,807 ​ $ — Restricted cash ​ $ 102,727 ​ $ 102,727 ​ $ — ​ $ — Restricted investments ​ $ 66,402 ​ $ — ​ $ 66,402 ​ $ — Contingent consideration ​ $ (81,415) ​ $ — ​ $ — ​ $ (81,415) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurement at December 31, 2021 Using ​ ​ ​ Quoted Prices in Significant ​ ​ ​ ​ ​ ​ ​ Active Markets ​ Other ​ Significant ​ ​ ​ ​ ​ for Identical ​ Observable ​ Unobservable ​ ​ ​ ​ ​ Assets ​ Inputs ​ Inputs ​ ​ Total ​ (Level 1) ​ (Level 2) ​ (Level 3) Interest rate swap derivative instruments – net liability position ​ $ (51,081) ​ $ — ​ $ (51,081) ​ $ — Restricted cash ​ $ 72,174 ​ $ 72,174 ​ $ — ​ $ — Restricted investments ​ $ 58,797 ​ $ — ​ $ 58,797 ​ $ — Contingent consideration ​ $ (94,308) ​ $ — ​ $ — ​ $ (94,308)
Fair Value for Level 3 Liabilities	The following table summarizes the changes in the fair value for Level 3 liabilities related to contingent consideration for the three months ended March 31, 2023 and 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 31, ​ ​ 2023 2022 Beginning balance ​ $ 81,415 ​ $ 94,308 ​ Contingent consideration recorded at acquisition date ​ 6,000 ​ 5,000 ​ Payment of contingent consideration recorded at acquisition date ​ (1,319) ​ (3,571) ​ Adjustments to contingent consideration ​ ​ (637) ​ (52) ​ Interest accretion expense ​ 363 ​ 353 ​ Ending balance ​ $ 85,822 ​ $ 96,038 ​	The following table summarizes the changes in the fair value for Level 3 liabilities related to contingent consideration for the years ended December 31, 2022 and 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ 2022 2021 Beginning balance ​ $ 94,308 ​ $ 71,736 Contingent consideration recorded at acquisition date ​ 6,642 ​ 31,616 Payment of contingent consideration recorded at acquisition date ​ (16,911) ​ (12,934) Payment of contingent consideration recorded in earnings ​ (2,982) ​ (520) Adjustments to contingent consideration ​ ​ (1,030) ​ ​ 2,954 Interest accretion expense ​ 1,417 ​ 1,470 Foreign currency translation adjustment ​ (29) ​ (14) Ending balance ​ $ 81,415 ​ $ 94,308

Other Comprehensive Income (L_2

Other Comprehensive Income (Loss) (Tables)	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Other Comprehensive Income (Loss) [Abstract]
Components of Other Comprehensive Income (Loss)	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 31, 2023 ​ Gross Tax Effect Net of Tax Interest rate swap amounts reclassified into interest expense ​ $ (4,080) ​ ​ 1,081 ​ $ (2,999) Changes in fair value of interest rate swaps ​ (3,299) ​ ​ 874 ​ (2,425) Foreign currency translation adjustment ​ 1,682 ​ — ​ 1,682 ​ ​ $ (5,697) ​ $ 1,955 ​ $ (3,742) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 31, 2022 ​ Gross Tax Effect Net of Tax Interest rate swap amounts reclassified into interest expense ​ $ 4,750 ​ $ (1,259) ​ $ 3,491 Changes in fair value of interest rate swaps ​ 44,699 ​ (11,845) ​ 32,854 Foreign currency translation adjustment ​ 34,429 ​ — ​ 34,429 ​ ​ $ 83,878 ​ $ (13,104) ​ $ 70,774	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, 2022 ​ Gross Tax Effect Net of Tax Interest rate swap amounts reclassified into interest expense ​ $ 6,551 ​ $ (1,736) ​ $ 4,815 Changes in fair value of interest rate swaps ​ 76,336 ​ (20,229) ​ 56,107 Foreign currency translation adjustment ​ (157,336) ​ — ​ (157,336) ​ ​ $ (74,449) ​ $ (21,965) ​ $ (96,414) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, 2021 ​ Gross Tax Effect Net of Tax Interest rate swap amounts reclassified into interest expense ​ $ 20,321 ​ $ (5,385) ​ $ 14,936 Changes in fair value of interest rate swaps ​ 23,287 ​ (6,171) ​ 17,116 Foreign currency translation adjustment ​ 8,183 ​ — ​ 8,183 ​ ​ $ 51,791 ​ $ (11,556) ​ $ 40,235 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, 2020 ​ Gross Tax Effect Net of Tax Interest rate swap amounts reclassified into interest expense ​ $ 9,778 ​ $ (2,591) ​ $ 7,187 Changes in fair value of interest rate swaps ​ (64,664) ​ 17,136 ​ (47,528) Foreign currency translation adjustment ​ ​ 50,653 ​ ​ — ​ ​ 50,653 ​ ​ $ (4,233) ​ $ 14,545 ​ $ 10,312
Amounts Included in Accumulated Other Comprehensive Income (Loss)	A rollforward of the amounts included in AOCIL, net of taxes, for the three months ended March 31, 2023 and 2022, is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Foreign Accumulated ​ ​ ​ ​ ​ Currency ​ Other ​ ​ Interest ​ Translation ​ Comprehensive ​ ​ Rate Swaps ​ Adjustment ​ Income (Loss) Balance at December 31, 2022 ​ $ 23,378 ​ $ (80,208) ​ $ (56,830) Amounts reclassified into earnings ​ ​ (2,999) ​ ​ — ​ ​ (2,999) Changes in fair value ​ ​ (2,425) ​ ​ — ​ ​ (2,425) Foreign currency translation adjustment ​ ​ — ​ ​ 1,682 ​ ​ 1,682 Balance at March 31, 2023 ​ $ 17,954 ​ $ (78,526) ​ $ (60,572) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Foreign Accumulated ​ ​ ​ ​ ​ Currency ​ Other ​ ​ Interest ​ Translation ​ Comprehensive ​ ​ Rate Swaps ​ Adjustment ​ Income (Loss) Balance at December 31, 2021 ​ $ (37,544) ​ $ 77,128 ​ $ 39,584 Amounts reclassified into earnings ​ 3,491 ​ — ​ 3,491 Changes in fair value ​ 32,854 ​ — ​ 32,854 Foreign currency translation adjustment ​ — ​ 34,429 ​ 34,429 Balance at March 31, 2022 ​ $ (1,199) ​ $ 111,557 ​ $ 110,358	A roll forward of the amounts included in AOCIL, net of taxes, is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Foreign Accumulated ​ ​ ​ ​ ​ Currency ​ Other ​ ​ Interest ​ Translation ​ Comprehensive ​ ​ Rate Swaps ​ Adjustment ​ Income (Loss) Balance at December 31, 2020 ​ $ (69,596) ​ $ 68,945 ​ $ (651) Amounts reclassified into earnings ​ 14,936 ​ — ​ 14,936 Changes in fair value ​ 17,116 ​ — ​ 17,116 Foreign currency translation adjustment ​ — ​ 8,183 ​ 8,183 Balance at December 31, 2021 ​ ​ (37,544) ​ ​ 77,128 ​ ​ 39,584 Amounts reclassified into earnings ​ ​ 4,815 ​ ​ — ​ ​ 4,815 Changes in fair value ​ ​ 56,107 ​ ​ — ​ ​ 56,107 Foreign currency translation adjustment ​ ​ — ​ ​ (157,336) ​ ​ (157,336) Balance at December 31, 2022 ​ $ 23,378 ​ $ (80,208) ​ $ (56,830)

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common Stock Shares Reserved for Issuance		​ ​ ​ ​ For outstanding RSUs, PSUs and warrants 2,233,831 For future grants under the 2016 Incentive Award Plan 3,262,941 For future grants under the Employee Share Purchase Plan ​ 948,011 ​ 6,444,783
Restricted Stock Units Activity		A summary of the Company’s RSU activity is presented below: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ 2022 2021 2020 Weighted average grant-date fair value of restricted share units granted ​ $ 121.26 ​ $ 100.27 ​ $ 101.79 Total fair value of restricted share units vested ​ $ 28,751 ​ $ 26,711 ​ $ 23,742
Summary of Warrant Activity		A summary of warrant activity during the year ended December 31, 2022, is presented below: ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted-Average ​ ​ Warrants ​ Exercise Price Outstanding at December 31, 2021 578,405 ​ $ 104.82 Granted 380,478 ​ $ 138.33 Forfeited (65,331) ​ $ 80.49 Exercised (38,922) ​ $ 78.24 Outstanding at December 31, 2022 854,630 ​ $ 122.81
Summarized Information about Warrants Outstanding		The following table summarizes information about warrants outstanding as of December 31, 2022 and 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value of ​ ​ ​ ​ ​ ​ Warrants ​ ​ ​ Warrants ​ Outstanding at December 31, Grant Date ​ Issued ​ Exercise Price ​ Issued ​ 2022 ​ 2021 Throughout 2017 35,382 ​ $53.65 to $69.96 ​ $ 595 — 1,521 Throughout 2018 163,995 ​ $70.91 to $80.90 ​ $ 2,591 45,024 112,756 Throughout 2019 ​ 151,008 ​ $74.25 to $95.61 ​ $ 2,634 ​ 66,977 ​ 101,977 Throughout 2020 ​ 164,890 ​ $72.65 to $104.89 ​ $ 3,140 ​ 146,386 ​ 146,386 Throughout 2021 ​ 218,166 ​ $99.33 to $135.97 ​ $ 5,584 ​ 215,765 ​ 215,765 Throughout 2022 ​ 380,478 ​ $125.32 to $143.95 ​ $ 12,972 ​ 380,478 ​ — ​ ​ ​ ​ ​ ​ ​ 854,630 578,405
Restricted Stock Units (RSUs)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Summary of Activity Related to Restricted Share Units	A summary of activity related to restricted share units (“RSUs”) during the three-month period ended March 31, 2023, is presented below: ​ ​ ​ ​ ​ Unvested Shares Outstanding at December 31, 2022 955,999 Granted 403,026 Forfeited (13,835) Vested and issued (325,490) Outstanding at March 31, 2023 1,019,700	A summary of activity related to RSUs during the year ended December 31, 2022, is presented below: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted-Average ​ ​ ​ ​ Grant Date Fair ​ Unvested Shares ​ Value Per Share Outstanding at December 31, 2021 861,695 ​ $ 95.63 Granted 483,281 ​ $ 121.26 Forfeited (70,126) ​ $ 110.86 Vested and issued (318,851) ​ $ 90.17 Outstanding at December 31, 2022 955,999 ​ $ 109.29
Summary of Activity Related to Restricted Share Units	A summary of activity related to restricted share units (“RSUs”) during the three-month period ended March 31, 2023, is presented below: ​ ​ ​ ​ ​ Unvested Shares Outstanding at December 31, 2022 955,999 Granted 403,026 Forfeited (13,835) Vested and issued (325,490) Outstanding at March 31, 2023 1,019,700	A summary of activity related to RSUs during the year ended December 31, 2022, is presented below: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted-Average ​ ​ ​ ​ Grant Date Fair ​ Unvested Shares ​ Value Per Share Outstanding at December 31, 2021 861,695 ​ $ 95.63 Granted 483,281 ​ $ 121.26 Forfeited (70,126) ​ $ 110.86 Vested and issued (318,851) ​ $ 90.17 Outstanding at December 31, 2022 955,999 ​ $ 109.29
Performance Shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Summary of Performance-Based Restricted Share Units Activity and Related Information	A summary of activity related to performance-based restricted share units (“PSUs”) during the three-month period ended March 31, 2023, is presented below: ​ ​ ​ ​ ​ Unvested Shares Outstanding at December 31, 2022 341,850 Granted 105,581 Vested and issued (140,498) Outstanding at March 31, 2023 306,933	A summary of activity related to PSUs during the year ended December 31, 2022, is presented below: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted-Average ​ ​ ​ ​ Grant Date Fair ​ Unvested Shares ​ Value Per Share Outstanding at December 31, 2021 392,043 ​ $ 91.63 Granted 95,038 ​ $ 117.94 Forfeited (87,554) ​ $ 80.70 Vested and issued (57,677) ​ $ 81.04 Outstanding at December 31, 2022 341,850 ​ $ 103.53
Performance-Based Restricted Share Units Activity		A summary of the Company’s PSU activity is presented below: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ 2022 2021 2020 Weighted average grant-date fair value of PSUs granted ​ $ 117.94 ​ $ 96.99 ​ $ 87.19 Total fair value of PSUs vested ​ $ 4,674 ​ $ 10,954 ​ $ 15,628
Summary of Performance-Based Restricted Share Units Activity and Related Information	A summary of activity related to performance-based restricted share units (“PSUs”) during the three-month period ended March 31, 2023, is presented below: ​ ​ ​ ​ ​ Unvested Shares Outstanding at December 31, 2022 341,850 Granted 105,581 Vested and issued (140,498) Outstanding at March 31, 2023 306,933	A summary of activity related to PSUs during the year ended December 31, 2022, is presented below: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted-Average ​ ​ ​ ​ Grant Date Fair ​ Unvested Shares ​ Value Per Share Outstanding at December 31, 2021 392,043 ​ $ 91.63 Granted 95,038 ​ $ 117.94 Forfeited (87,554) ​ $ 80.70 Vested and issued (57,677) ​ $ 81.04 Outstanding at December 31, 2022 341,850 ​ $ 103.53
Deferred Share Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Summary of Activity Related to Restricted Share Units	A summary of activity related to deferred share units (“DSUs”) during the three-month period ended March 31, 2023, is presented below: ​ ​ ​ ​ ​ Vested Shares Outstanding at December 31, 2022 26,536 Granted 3,945 Outstanding at March 31, 2023 30,481	A summary of activity related to DSUs during the year ended December 31, 2022, is presented below: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted-Average ​ ​ ​ ​ Grant Date Fair ​ Vested Shares ​ Value Per Share Outstanding at December 31, 2021 24,442 ​ $ 64.05 Granted 2,094 ​ $ 121.00 Outstanding at December 31, 2022 26,536 ​ $ 68.55
Restricted Stock Units Activity		A summary of the Company’s deferred share units (“DSUs”) activity is presented below: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ 2022 ​ 2021 2020 Weighted average grant-date fair value of DSUs granted ​ $ 121.00 ​ $ 99.80 ​ $ 103.81 Total fair value of DSUs awarded ​ $ 253 ​ $ 285 ​ $ 272
Summary of Activity Related to Restricted Share Units	A summary of activity related to deferred share units (“DSUs”) during the three-month period ended March 31, 2023, is presented below: ​ ​ ​ ​ ​ Vested Shares Outstanding at December 31, 2022 26,536 Granted 3,945 Outstanding at March 31, 2023 30,481	A summary of activity related to DSUs during the year ended December 31, 2022, is presented below: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted-Average ​ ​ ​ ​ Grant Date Fair ​ Vested Shares ​ Value Per Share Outstanding at December 31, 2021 24,442 ​ $ 64.05 Granted 2,094 ​ $ 121.00 Outstanding at December 31, 2022 26,536 ​ $ 68.55
Progressive Waste Solutions Ltd.
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Summary of Stock Option Activity and Related Information	​ ​ ​ ​ Outstanding at December 31, 2022 43,570 Cash settled — Outstanding at March 31, 2023 43,570	​ ​ ​ ​ Outstanding at December 31, 2021 45,869 Cash settled (2,299) Outstanding at December 31, 2022 43,570
Summary of Stock Option Activity and Related Information	​ ​ ​ ​ Outstanding at December 31, 2022 43,570 Cash settled — Outstanding at March 31, 2023 43,570	​ ​ ​ ​ Outstanding at December 31, 2021 45,869 Cash settled (2,299) Outstanding at December 31, 2022 43,570
Progressive Waste Solutions Ltd. | Restricted Stock Units (RSUs)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Summary of Activity Related to Restricted Share Units	​ ​ ​ ​ Outstanding at December 31, 2022 57,829 Cash settled (5,803) Outstanding at March 31, 2023 52,026	​ ​ ​ ​ Outstanding at December 31, 2021 63,032 Cash settled (5,203) Outstanding at December 31, 2022 57,829
Summary of Activity Related to Restricted Share Units	​ ​ ​ ​ Outstanding at December 31, 2022 57,829 Cash settled (5,803) Outstanding at March 31, 2023 52,026	​ ​ ​ ​ Outstanding at December 31, 2021 63,032 Cash settled (5,203) Outstanding at December 31, 2022 57,829

Revenue - Revenues by Service L

Revenue - Revenues by Service Line (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenue from External Customer [Line Items]
Revenues	$ 1,900,503	$ 1,646,255	$ 7,211,859	$ 6,151,361	$ 5,445,990
Reportable Segments [Member] | Commercial | Collection
Revenue from External Customer [Line Items]
Revenues	602,279	499,676
Reportable Segments [Member] | Residential | Collection
Revenue from External Customer [Line Items]
Revenues	514,053	440,288
Reportable Segments [Member] | Industrial and construction roll off | Collection
Revenue from External Customer [Line Items]
Revenues	318,315	259,488
Reportable Segments [Member] | Collection
Revenue from External Customer [Line Items]
Revenues	1,434,647	1,199,452	5,251,027	4,441,426	3,971,678
Reportable Segments [Member] | Landfill
Revenue from External Customer [Line Items]
Revenues	343,433	299,765	1,328,942	1,233,499	1,146,732
Reportable Segments [Member] | Transfer
Revenue from External Customer [Line Items]
Revenues	273,521	217,957	1,026,050	859,113	777,754
Reportable Segments [Member] | Recycling
Revenue from External Customer [Line Items]
Revenues	31,301	63,094	204,876	205,076	86,389
Reportable Segments [Member] | E&P
Revenue from External Customer [Line Items]
Revenues	51,759	43,555	210,562	138,707	159,438
Reportable Segments [Member] | Intermodal and other
Revenue from External Customer [Line Items]
Revenues	38,212	45,693	188,471	152,194	118,396
Intercompany Revenue [Member]
Revenue from External Customer [Line Items]
Revenues	$ (272,370)	$ (223,261)	$ (998,069)	$ (878,654)	$ (814,397)

Revenue - Contract Acquisition

Revenue - Contract Acquisition Costs (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Capitalized contract costs	$ 23,818	$ 23,818	$ 18,954
Minimum
Estimated life of relevant customer relationship	1 year	1 year
Maximum
Estimated life of relevant customer relationship	5 years	5 years

Accounts Receivable - Allowance

Accounts Receivable - Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Credit Losses, Beginning Balance	$ 22,939	$ 18,480	$ 18,480	$ 19,380
Current period provision for expected credit losses	2,247	3,022	17,353	9,719	$ 15,509
Write-offs charged against the allowance	(5,017)	(3,435)	(18,273)	(15,545)
Recoveries collected	2,068	1,272	5,473	4,918
Impact of changes in foreign currency	2	22	94	(8)
Allowance for Credit Losses, Ending Balance	$ 22,239	$ 19,361	$ 22,939	$ 18,480	$ 19,380

Landfill Accounting - Landfills

Landfill Accounting - Landfills Owned and Operated (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2023 USD ($) site	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Landfill Accounting [Line Items]
Number of landfills owned and operated by company	89
Number of landfills operated, not owned, under life-of-site operating agreements	5
Number of landfills operated under limited-term operating agreements	7
Property and equipment, net | $	$ 6,956,620	$ 6,950,915	$ 5,721,949
Average remaining landfill life based on permitted capacity and projected annual disposal volumes	31 years
Number of owned landfills the company is seeking to expand	10
Number of landfills operated under life-of-site operating agreements that the company is seeking to expand	2
Average remaining landfill life based on permitted capacity, projected annual disposal volumes and probable expansion capacity	34 years
Life of Company's owned landfills and landfills operated under life-of-site operating agreements min range	2 years	1 year
Life of Company's owned landfills and landfills operated under life of site operating agreements max range	308 years	329 years
Percentage of projected annual disposal volume from landfills with remaining lives within threshold period	90%	90%
Threshold period used for measurement of projected annual disposal volume from landfills	70 years	70 years
Landfill
Landfill Accounting [Line Items]
Property and equipment, net | $	$ 3,284,137

Landfill Accounting - Landfill

Landfill Accounting - Landfill Depletion (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2023 USD ($) $ / T	Mar. 31, 2022 USD ($) $ / T
Landfill Accounting [Line Items]
Landfill depletion expense | $	$ 59,055	$ 53,826
Average rate per ton consumed related to landfill depletion at owned landfills and landfills operated under life-of-site agreements | $ / T	5.06	4.90

Landfill Accounting - Reserve A

Landfill Accounting - Reserve Assumptions and Accretion Expense (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023 USD ($) $ / T	Mar. 31, 2022 USD ($) $ / T	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Landfill Accounting [Line Items]
Accretion expense associated with landfill obligations | $	$ 4,474	$ 4,050	$ 16,068	$ 14,333
Average rate per ton consumed related to final capping, closure and post-closure landfill accretion expense | $ / T	0.38	0.37
Landfill
Landfill Accounting [Line Items]
Inflation rate for purposes of computing layers for final capping, closure and post-closure obligations	2.75%
Landfill | Minimum
Landfill Accounting [Line Items]
Inflation rate for purposes of computing layers for final capping, closure and post-closure obligations			2.25%
Landfill | Maximum
Landfill Accounting [Line Items]
Inflation rate for purposes of computing layers for final capping, closure and post-closure obligations			2.75%
Landfill | Measurement Input, Discount Rate
Landfill Accounting [Line Items]
Discount rate for purposes of computing layers for final capping, closure and post-closure obligations	5.50%
Landfill | Measurement Input, Discount Rate | Minimum
Landfill Accounting [Line Items]
Discount rate for purposes of computing layers for final capping, closure and post-closure obligations			3.25%
Landfill | Measurement Input, Discount Rate | Maximum
Landfill Accounting [Line Items]
Discount rate for purposes of computing layers for final capping, closure and post-closure obligations			5.50%

Landfill Accounting - Final Cap

Landfill Accounting - Final Capping, Closure and Post-Closure Liability (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021
Landfill Accounting [Line Items]
Final capping, closure and post-closure liability at the beginning of the period	$ 344,606	$ 302,537	$ 302,537	$ 301,896
Liability adjustments	14,704
Accretion expense associated with landfill obligations	4,474	$ 4,050	16,068	14,333
Closure payments	(5,346)		(18,834)	(21,040)
Assumption of closure liabilities from acquisitions	3,443		8,575	11,380
Disposition of closure liabilities from divested operations			(916)	(3,566)
Foreign currency translation adjustment	24		2,145	(615)
Final capping, closure and post-closure liability at the end of the period	$ 361,905		$ 344,606	$ 302,537

Landfill Accounting - Liability

Landfill Accounting - Liability Adjustments and Restricted Cash and Investments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Landfill Accounting [Line Items]
Liability adjustments	$ 14,704
Restricted cash	106,625	$ 102,727	$ 72,174
Restricted investments	74,358	68,099	$ 59,014
Landfill
Landfill Accounting [Line Items]
Restricted cash	8,130	6,890
Restricted investments	$ 62,552	$ 57,469

Acquisitions - Narrative (Detai

Acquisitions - Narrative (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023 USD ($) entity	Mar. 31, 2022 USD ($) entity	Mar. 31, 2023 USD ($) entity	Dec. 31, 2022 USD ($)	Dec. 31, 2022 USD ($) entity	Dec. 31, 2022 USD ($) agreement	Dec. 31, 2021 USD ($) entity agreement	Dec. 31, 2020 USD ($) entity
Business Acquisition [Line Items]
Number of immaterial businesses acquired in period | entity	4	4			24		30	21
Acquisition-related costs	$ 2,081	$ 4,540		$ 24,933			$ 11,318	$ 9,803
Contingent consideration							(31,616)
Goodwill expected to be deductible for tax purposes	36,853	80,455	$ 36,853	510,755	$ 510,755	$ 510,755	187,287	169,147
Trade receivables acquired in business combination gross contractual amount	4,164	11,412	4,164	54,332	54,332	54,332	36,645	13,854
Trade receivables acquired in business combination expected to be uncollectible amount	$ 282	$ 2,201	$ 282	4,636	$ 4,636	$ 4,636	$ 3,409	$ 95
Number of individually immaterial acquisitions			10		17	17
Number of immaterial businesses acquired in period | entity	4	4			24		30	21
Acquisition-related costs	$ 2,081	$ 4,540		24,933			$ 11,318	$ 9,803
Number of businesses acquired with contingent consideration | agreement							9
Contingent considerations							$ 31,616
Payment of contingent consideration recorded at acquisition date	$ 1,319	$ 3,571		$ 16,911			$ 12,934	$ 12,566

Acquisitions - Consideration Tr

Acquisitions - Consideration Transferred to Acquire Businesses and Assets Acquired, Liabilities Assumed Schedule (Detail) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023 USD ($)	Mar. 31, 2022 USD ($)	Mar. 31, 2023 USD ($) entity	Dec. 31, 2022 USD ($)	Dec. 31, 2022 USD ($) entity	Dec. 31, 2022 USD ($) agreement	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Fair value of consideration transferred:
Cash	$ 144,611	$ 355,212		$ 2,206,901			$ 960,449	$ 388,789
Change in open working capital settlements at year end				0			0	1,505
Consideration transferred	161,708	355,212		2,334,037			1,068,794	481,643
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Accounts receivable	3,882	9,211	$ 3,882	49,696	$ 49,696	$ 49,696	33,236	13,759
Prepaid expenses and other current assets	2,290	2,059	2,290	9,428	9,428	9,428	4,866	4,509
Restricted investments	5,462	0	5,462	7,469	7,469	7,469	0	0
Operating lease right-of-use assets	587	1,715	587	4,707	4,707	4,707	5,972	5,247
Property and equipment	67,201	89,565	67,201	1,073,155	1,073,155	1,073,155	394,687	173,394
Indefinite-lived intangibles							9,557	13,465
Other assets				243	243	243	77	389
Current portion of operating lease liabilities	(53)	(830)	(53)	(1,546)	(1,546)	(1,546)	(1,370)	(509)
Deferred revenue	(761)	(3,077)	(761)	(10,761)	(10,761)	(10,761)	(8,389)	(1,821)
Long-term portion of operating lease liabilities	(534)	(885)	(534)	(3,161)	(3,161)	(3,161)	(4,602)	(4,738)
Other long-term liabilities	(4,543)	(631)	(4,543)	(6,915)	(6,915)	(6,915)	(13,976)	(2,136)
Deferred income taxes	(1,077)	(9,317)	(1,077)	(51,507)	(51,507)	(51,507)	(63,822)	(4,525)
Total identifiable net assets	124,855	140,611	124,855	1,509,446	1,509,446	1,509,446	614,199	296,340
Goodwill	36,853	214,601		824,591			454,595	185,303
Goodwill expected to be deductible for tax purposes	36,853	80,455	$ 36,853	510,755	$ 510,755	$ 510,755	187,287	169,147
Number of individually immaterial acquisitions			10		17	17
Trade receivables acquired in business combination gross contractual amount	4,164	11,412	$ 4,164	54,332	$ 54,332	$ 54,332	36,645	13,854
Trade receivables acquired in business combination expected to be uncollectible amount	282	2,201	282	4,636	4,636	4,636	3,409	95
Accounts Payable and Accrued Liabilities [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Accounts payable and accrued liabilities	(4,159)	(20,382)	(4,159)	(56,633)	(56,633)	(56,633)	(37,827)	(14,174)
Debt [Member]
Fair value of consideration transferred:
Debt assumed	17,097	0		127,136			108,345	91,349
Contingent Consideration [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Contingent consideration	(6,000)	(5,000)	(6,000)	(6,642)	(6,642)	(6,642)	(31,616)	(4,688)
Long Term Franchise Agreements And Contracts [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Intangibles	58,630	4,994	58,630	239,866	239,866	239,866	134,827	59,149
Customer Lists [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Intangibles	1,527	38,944	1,527	74,940	74,940	74,940	75,612	48,512
Permits and Other [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Intangibles	$ 2,403	$ 34,245	$ 2,403	$ 187,107	$ 187,107	$ 187,107	$ 116,967	$ 10,507

Intangible Assets, Net - Narrat

Intangible Assets, Net - Narrative (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Long-term Franchise Agreements and Contracts
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted average amortization period of acquired intangible assets	25 years	28 years 10 months 24 days
Customer Lists
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted average amortization period of acquired intangible assets	11 years 6 months	11 years 6 months
Permits and Other
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted average amortization period of acquired intangible assets	40 years	40 years

Intangible Assets, Net - Intang

Intangible Assets, Net - Intangible Assets Exclusive of Goodwill (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, Finite-Lived Intangible Assets	$ 2,535,576	$ 2,472,990	$ 2,033,511
Gross Carrying Amount, Intangible Assets	2,717,189	2,654,603
Accumulated Amortization, Finite-Lived Intangible Assets	(979,212)	(939,902)	(823,743)
Accumulated Impairment Loss, Finite-Lived Intangible Assets	(40,784)	(40,784)
Accumulated Impairment Loss, Indefinite-Lived Intangible Assets		(40,784)	(40,784)
Accumulated Impairment Loss, Intangible Assets	(40,784)	(40,784)
Net Carrying Amount, Finite-Lived Intangible Assets	1,515,580	1,492,304	1,168,984
Net Carrying Amount, Intangible Assets	1,697,193	1,673,917	1,350,597
Solid Waste Collection and Transportation Permits
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, Indefinite-Lived Intangible Assets		181,613	181,613
Net Carrying Amount, Indefinite-Lived Intangible Assets	181,613	181,613	181,613
Long-term Franchise Agreements and Contracts
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, Finite-Lived Intangible Assets	975,058	916,582	724,128
Accumulated Amortization, Finite-Lived Intangible Assets	(312,988)	(297,382)	(278,827)
Net Carrying Amount, Finite-Lived Intangible Assets	662,070	619,200	445,301
Customer Lists
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, Finite-Lived Intangible Assets	778,352	776,719	711,047
Accumulated Amortization, Finite-Lived Intangible Assets	(545,232)	(527,425)	(450,109)
Net Carrying Amount, Finite-Lived Intangible Assets	233,120	249,294	260,938
Permits and Other
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, Finite-Lived Intangible Assets	782,166	779,689	598,336
Accumulated Amortization, Finite-Lived Intangible Assets	(120,992)	(115,095)	(94,807)
Accumulated Impairment Loss, Finite-Lived Intangible Assets	(40,784)	(40,784)
Accumulated Impairment Loss, Indefinite-Lived Intangible Assets		(40,784)	(40,784)
Net Carrying Amount, Finite-Lived Intangible Assets	$ 620,390	$ 623,810	$ 462,745

Intangible Assets, Net - Estima

Intangible Assets, Net - Estimated Future Amortization Expense, Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Intangible Assets, Net [Abstract]
For the year ending December 31, 2023	$ 156,320
For the year ending December 31, 2024	141,755	$ 153,457
For the year ending December 31, 2025	124,919	135,884
For the year ending December 31, 2026	109,325	119,071
For the year ending December 31, 2027	$ 95,730	103,541
For the year ending December 31, 2028		$ 89,959

Long-Term Debt - Schedule of LT

Long-Term Debt - Schedule of LT Debt and Capital Lease Obligations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Mar. 31, 2023	Dec. 31, 2021
Debt Instrument [Line Items]
Finance leases	$ 11,464	$ 10,791	$ 10,519
Total debt and lease obligations	6,963,401	6,997,427	5,101,971
Less - current portion	(6,759)	(10,513)	(6,020)
Less - unamortized debt discount and issuance costs	(66,493)	(65,075)	(55,451)
Long-term Debt and Lease Obligation	$ 6,890,149	$ 6,921,839	5,040,500
Minimum
Debt Instrument [Line Items]
Finance leases interest rate	1.89%	1.89%
Maximum
Debt Instrument [Line Items]
Finance leases interest rate	2.16%	2.16%
Credit Agreement | Revolving Credit Facility
Debt Instrument [Line Items]
Long Term Debt	$ 614,705	$ 650,587	803,944
Credit Agreement | Revolving Credit Facility | Minimum
Debt Instrument [Line Items]
Line of credit, interest rate	5.42%	5.77%
Credit Agreement | Revolving Credit Facility | Maximum
Debt Instrument [Line Items]
Line of credit, interest rate	5.74%	5.92%
Credit Agreement | Term Loan Facility
Debt Instrument [Line Items]
Long Term Debt	$ 650,000	$ 650,000	650,000
Line of credit, interest rate	5.42%	5.77%
Term Loan Agreement | Term Loan Facility
Debt Instrument [Line Items]
Long Term Debt	$ 800,000	$ 800,000	0
Interest rate	5.42%	5.78%
Margin rate for loans	1%
Senior Notes due 2028 | Senior Notes
Debt Instrument [Line Items]
Long Term Debt	$ 500,000	$ 500,000	$ 500,000
Interest rate	4.25%	4.25%	4.25%
Senior Notes due 2029 | Senior Notes
Debt Instrument [Line Items]
Long Term Debt	$ 500,000	$ 500,000	$ 500,000
Interest rate	3.50%	3.50%	3.50%
Senior Notes due 2030 | Senior Notes
Debt Instrument [Line Items]
Long Term Debt	$ 600,000	$ 600,000	$ 600,000
Interest rate	2.60%	2.60%	2.60%
Senior Notes due 2032 | Senior Notes
Debt Instrument [Line Items]
Long Term Debt	$ 650,000	$ 650,000	$ 650,000
Interest rate	2.20%	2.20%
New Senior Notes due 2032 | Senior Notes
Debt Instrument [Line Items]
Long Term Debt	$ 500,000	$ 500,000	0
Interest rate	3.20%	3.20%
Senior Notes due 2033 | Senior Notes
Debt Instrument [Line Items]
Long Term Debt	$ 750,000	$ 750,000	0
Interest rate	4.20%	4.20%
Senior Notes due 2050 | Senior Notes
Debt Instrument [Line Items]
Long Term Debt	$ 500,000	$ 500,000	$ 500,000
Interest rate	3.05%	3.05%	3.05%
Senior Notes due 2052 | Senior Notes
Debt Instrument [Line Items]
Long Term Debt	$ 850,000	$ 850,000	$ 850,000
Interest rate	2.95%	2.95%	2.95%
Notes Payable to Sellers and Other Third Parties
Debt Instrument [Line Items]
Long Term Debt	$ 37,232	$ 36,049	$ 37,508
Notes Payable to Sellers and Other Third Parties | Minimum
Debt Instrument [Line Items]
Interest rate	2.42%	2.42%
Notes Payable to Sellers and Other Third Parties | Maximum
Debt Instrument [Line Items]
Interest rate	10.35%	10.35%

Long-Term Debt - Credit Agreeme

Long-Term Debt - Credit Agreement Schedule (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Credit Agreement | SOFR
Debt Instrument [Line Items]
Margin rate for loans		0.10%
Revolving Credit Facility | Credit Agreement
Debt Instrument [Line Items]
Available	$ 1,159,902	$ 1,193,502	$ 933,775
Amount drawn	$ 650,587	$ 614,705	$ 803,944
Commitment - rate applicable	0.09%	0.09%	0.09%
Revolving Credit Facility | Credit Agreement | SOFR
Debt Instrument [Line Items]
Amount drawn		$ 391,000
Interest rate applicable		5.42%
Margin rate for loans		1%
Revolving Credit Facility | Credit Agreement | Canadian Bankers Acceptance Loan
Debt Instrument [Line Items]
Amount drawn	$ 210,587	$ 223,705	$ 3,944
Interest rate applicable	5.92%	5.74%	1.45%
Margin rate for loans		1%	1%
Revolving Credit Facility | Credit Agreement 1 [Member] | SOFR
Debt Instrument [Line Items]
Amount drawn	$ 280,000	$ 391,000
Interest rate applicable	5.77%	5.42%
Revolving Credit Facility | Credit Agreement 2 [Member] | SOFR
Debt Instrument [Line Items]
Amount drawn	$ 100,000	$ 0
Interest rate applicable	5.78%	0%
Revolving Credit Facility | Credit Agreement 3 [Member] | SOFR
Debt Instrument [Line Items]
Amount drawn	$ 60,000	$ 0
Interest rate applicable	5.91%	0%
Letter of Credit | Credit Agreement
Debt Instrument [Line Items]
Letter of credit	$ 39,511	$ 41,793	$ 112,281
Term Loan Facility | Credit Agreement | SOFR
Debt Instrument [Line Items]
Amount drawn	$ 650,000	$ 650,000
Interest rate applicable	5.77%	5.42%
Margin rate for loans		1%

Long-Term Debt - Credit Agree_2

Long-Term Debt - Credit Agreement Narrative (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Letter of Credit [Member] | Other Facilities Not Affiliated With Credit Agreement [Member]
Debt Instrument [Line Items]
Letter of credit	$ 85,120	$ 85,319

Segment Reporting - Narrative (

Segment Reporting - Narrative (Details) - segment		3 Months Ended	12 Months Ended			36 Months Ended
	Apr. 01, 2023	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2022
Segment Reporting [Abstract]
Number of contracts or customers accounted for more than 10% of the Company's total revenues at the consolidated or reportable segment level		No single contract or customer accounted for more than 10% of the Company’s total revenues at the consolidated or reportable segment level during the periods presented.	No single contract or customer accounted for more than 10% of the Company’s total revenues at the consolidated or reportable segment level during the periods presented
Number of operating segments	6	6	6			6
Number of reportable segments		6	6	6	6	6

Segment Reporting - Summary of

Segment Reporting - Summary of Financial Information of Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Revenue	$ 1,900,503	$ 1,646,255	$ 7,211,859	$ 6,151,361	$ 5,445,990
Segment EBITDA	559,895	493,323	2,179,380	1,884,950	1,631,550
Depreciation and amortization			918,960	813,009	752,404
Capital expenditures			912,677	744,315	664,561
Total assets	17,227,094		17,134,603	14,699,924	13,992,364
Intercompany Revenue [Member]
Segment Reporting Information [Line Items]
Revenue	(272,370)	(223,261)	(998,069)	(878,654)	(814,397)
Reportable Segments [Member]
Segment Reporting Information [Line Items]
Revenue	2,172,873	1,869,516	8,209,928	7,030,015	6,260,387
Segment EBITDA	562,349	498,025	2,204,399	1,904,546	1,646,833
Eastern [Member]
Segment Reporting Information [Line Items]
Revenue	329,128	270,802	1,233,695	955,710	826,084
Segment EBITDA	73,275	65,287	281,522	245,091	196,068
Depreciation and amortization			190,480	156,499	143,744
Capital expenditures			138,028	90,212	111,912
Total assets			2,752,436	2,314,663	1,908,333
Eastern [Member] | Intercompany Revenue [Member]
Segment Reporting Information [Line Items]
Revenue	(59,669)	(45,165)	(211,498)	(155,836)	(142,927)
Eastern [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Revenue	388,797	315,967	1,445,193	1,111,546	969,011
Southern [Member]
Segment Reporting Information [Line Items]
Revenue	399,893	346,066	1,494,439	1,321,062	1,250,170
Segment EBITDA	121,914	101,124	466,519	369,221	343,181
Depreciation and amortization			175,614	173,235	173,885
Capital expenditures			151,093	139,258	125,972
Total assets			3,410,888	3,154,940	3,193,211
Southern [Member] | Intercompany Revenue [Member]
Segment Reporting Information [Line Items]
Revenue	(51,107)	(39,570)	(176,425)	(172,526)	(169,817)
Southern [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Revenue	451,000	385,636	1,670,864	1,493,588	1,419,987
Western [Member]
Segment Reporting Information [Line Items]
Revenue	395,839	333,659	1,428,031	1,228,626	1,102,752
Segment EBITDA	110,689	100,000	424,935	386,513	346,585
Depreciation and amortization			155,882	126,192	111,515
Capital expenditures			232,714	147,556	126,370
Total assets			3,239,679	2,168,804	1,770,403
Western [Member] | Intercompany Revenue [Member]
Segment Reporting Information [Line Items]
Revenue	(48,957)	(42,879)	(177,543)	(154,498)	(141,993)
Western [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Revenue	444,796	376,538	1,605,574	1,383,124	1,244,745
Central [Member]
Segment Reporting Information [Line Items]
Revenue	339,985	290,062	1,288,348	1,101,405	931,024
Segment EBITDA	115,756	96,951	446,315	379,644	332,321
Depreciation and amortization			156,895	138,683	117,499
Capital expenditures			181,065	149,360	109,013
Total assets			2,803,853	2,429,811	2,256,992
Central [Member] | Intercompany Revenue [Member]
Segment Reporting Information [Line Items]
Revenue	(43,540)	(32,936)	(159,355)	(142,261)	(127,885)
Central [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Revenue	383,525	322,998	1,447,703	1,243,666	1,058,909
Canada [Member]
Segment Reporting Information [Line Items]
Revenue	227,156	214,707	940,624	856,723	710,460
Segment EBITDA	82,984	84,844	349,403	339,859	256,119
Depreciation and amortization			118,388	111,458	103,334
Capital expenditures			70,051	68,183	109,886
Total assets			2,773,882	2,513,608	2,544,379
Canada [Member] | Intercompany Revenue [Member]
Segment Reporting Information [Line Items]
Revenue	(26,514)	(25,508)	(107,048)	(108,982)	(95,297)
Canada [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Revenue	253,670	240,215	1,047,672	965,705	805,757
Mid South [Member]
Segment Reporting Information [Line Items]
Revenue	208,502	190,959	826,722	687,835	625,500
Segment EBITDA	57,731	49,819	235,705	184,218	172,559
Depreciation and amortization			112,866	97,564	94,172
Capital expenditures			133,849	101,098	75,661
Total assets			1,727,323	1,690,234	1,428,929
Mid South [Member] | Intercompany Revenue [Member]
Segment Reporting Information [Line Items]
Revenue	(42,583)	(37,203)	(166,200)	(144,551)	(136,478)
Mid South [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Revenue	251,085	228,162	992,922	832,386	761,978
Corporate [Member]
Segment Reporting Information [Line Items]
Revenue	0	0	0	0	0
Segment EBITDA	(2,454)	(4,702)	(25,019)	(19,596)	(15,283)
Depreciation and amortization			8,835	9,378	8,255
Capital expenditures			5,877	48,648	5,747
Total assets			426,542	427,864	890,117
Corporate [Member] | Intercompany Revenue [Member]
Segment Reporting Information [Line Items]
Revenue	0	0	0	0	0
Corporate [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Revenue	$ 0	$ 0	$ 0	$ 0	$ 0

10-Q - Segment Reporting - Tota

10-Q - Segment Reporting - Total Assets for Reportable Segments (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Assets	$ 17,227,094	$ 17,134,603	$ 14,699,924	$ 13,992,364
Eastern [Member]
Segment Reporting Information [Line Items]
Assets		2,752,436	2,314,663	1,908,333
Southern [Member]
Segment Reporting Information [Line Items]
Assets		3,410,888	3,154,940	3,193,211
Western [Member]
Segment Reporting Information [Line Items]
Assets		3,239,679	2,168,804	1,770,403
Central [Member]
Segment Reporting Information [Line Items]
Assets		2,803,853	2,429,811	2,256,992
Canada [Member]
Segment Reporting Information [Line Items]
Assets		2,773,882	2,513,608	2,544,379
Mid South [Member]
Segment Reporting Information [Line Items]
Assets		1,727,323	1,690,234	1,428,929
Corporate [Member]
Segment Reporting Information [Line Items]
Assets		$ 426,542	$ 427,864	$ 890,117

Segment Reporting - Changes in

Segment Reporting - Changes in Goodwill by Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021
Goodwill [Line Items]
Goodwill, Beginning Balance	$ 6,902,297	$ 6,187,643	$ 6,187,643	$ 5,726,650
Goodwill transferred				0
Goodwill acquired	37,789	212,044	824,591	454,597
Goodwill acquisition adjustments	(936)	2,557		(2)
Goodwill divested				(324)
Impact of changes in foreign currency	1,417	25,519	(109,937)	6,722
Goodwill, Ending Balance	6,940,567	6,427,763	6,902,297	6,187,643
Eastern [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	1,189,111	992,578	992,578	1,374,577
Goodwill transferred				(557,353)
Goodwill acquired	3,440	85,866	196,533	175,354
Goodwill acquisition adjustments	0	0		0
Goodwill divested				0
Impact of changes in foreign currency	0	0	0	0
Goodwill, Ending Balance	1,192,551	1,078,444	1,189,111	992,578
Southern [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	1,547,894	1,457,437	1,457,437	1,532,215
Goodwill transferred				(77,430)
Goodwill acquired	0	0	90,457	2,976
Goodwill acquisition adjustments	(647)	0		0
Goodwill divested				(324)
Impact of changes in foreign currency	0	0	0	0
Goodwill, Ending Balance	1,547,247	1,457,437	1,547,894	1,457,437
Western [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	732,335	503,223	503,223	442,862
Goodwill transferred				(36,486)
Goodwill acquired	30,703	0	229,112	96,847
Goodwill acquisition adjustments	0	2,652		0
Goodwill divested				0
Impact of changes in foreign currency	0	0	0	0
Goodwill, Ending Balance	763,038	505,875	732,335	503,223
Central [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	1,003,470	931,269	931,269	824,204
Goodwill transferred				39,037
Goodwill acquired	397	2,794	72,201	68,028
Goodwill acquisition adjustments	0	0		0
Goodwill divested				0
Impact of changes in foreign currency	0	0	0	0
Goodwill, Ending Balance	1,003,867	934,063	1,003,470	931,269
Canada [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	1,684,670	1,559,512	1,559,512	1,552,792
Goodwill transferred				0
Goodwill acquired	0	123,384	235,095	0
Goodwill acquisition adjustments	(289)	0		(2)
Goodwill divested				0
Impact of changes in foreign currency	1,417	25,519	(109,937)	6,722
Goodwill, Ending Balance	1,685,798	1,708,415	1,684,670	1,559,512
Mid South [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	744,817	743,624	743,624	0
Goodwill transferred				632,232
Goodwill acquired	3,249	0	1,193	111,392
Goodwill acquisition adjustments	0	(95)		0
Goodwill divested				0
Impact of changes in foreign currency	0	0	0	0
Goodwill, Ending Balance	$ 748,066	$ 743,529	$ 744,817	$ 743,624

Segment Reporting - Property an

Segment Reporting - Property and Equipment in US and Canada (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Property and equipment	$ 6,956,620	$ 6,950,915	$ 5,721,949
UNITED STATES
Segment Reporting Information [Line Items]
Property and equipment		6,201,011	5,075,184
CANADA
Segment Reporting Information [Line Items]
Property and equipment		$ 749,904	$ 646,765

Segment Reporting - Reconciliat

Segment Reporting - Reconciliation of Segment EBITDA to Income Before Income Tax Provision (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment EBITDA	$ 559,895	$ 493,323	$ 2,179,380	$ 1,884,950	$ 1,631,550
Depreciation	(204,059)	(179,950)	(763,285)	(673,730)	(621,102)
Amortization of intangibles	(39,282)	(37,635)	(155,675)	(139,279)	(131,302)
Impairments and other operating items	(1,865)	(1,878)	(18,230)	(32,316)	(466,718)
Interest expense	(68,353)	(41,324)	(202,331)	(162,796)	(162,375)
Interest income	2,715	137	5,950	2,916	5,253
Other income (expense), net	3,174	(3,466)	3,154	6,285	(1,392)
Loss on early extinguishment of debt			0	(115,288)	0
Income before income tax provision	252,225	229,207	1,048,963	770,742	253,914
Reportable Segments [Member]
Segment EBITDA	562,349	498,025	2,204,399	1,904,546	1,646,833
Eastern [Member]
Segment EBITDA	73,275	65,287	281,522	245,091	196,068
Southern [Member]
Segment EBITDA	121,914	101,124	466,519	369,221	343,181
Western [Member]
Segment EBITDA	110,689	100,000	424,935	386,513	346,585
Central [Member]
Segment EBITDA	115,756	96,951	446,315	379,644	332,321
Canada [Member]
Segment EBITDA	82,984	84,844	349,403	339,859	256,119
Mid South [Member]
Segment EBITDA	57,731	49,819	235,705	184,218	172,559
Corporate [Member]
Segment EBITDA	$ (2,454)	$ (4,702)	$ (25,019)	$ (19,596)	$ (15,283)

(10-K22 - Summary of Significan

(10-K22 - Summary of Significant Accounting Policies - ) Derivative Financial Instruments - Interest Rate Swaps (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2023 USD ($) agreement	Dec. 31, 2022 USD ($) agreement
Derivative [Line Items]
Number of interest rate swap agreements | agreement	4	5
Interest Rate Swap One [Member]
Derivative [Line Items]
Date entered	2017-08	2017-08
Notional amount	$ 200,000	$ 200,000
Fixed interest rate paid	2.123%	2.123%
Variable interest rate received	1-month Term SOFR	1-month Term SOFR
Effective date	2022-11	2022-11
Expiration date	2025-10	2025-10
Interest Rate Swap Two [Member]
Derivative [Line Items]
Date entered	2018-06	2017-08
Notional amount	$ 200,000	$ 150,000
Fixed interest rate paid	2.848%	1.772%
Variable interest rate received	1-month Term SOFR	1-month Term SOFR
Effective date	2022-11	2022-11
Expiration date	2025-10	2023-02
Interest Rate Swap Three [Member]
Derivative [Line Items]
Date entered	2018-06	2018-06
Notional amount	$ 200,000	$ 200,000
Fixed interest rate paid	2.8284%	2.848%
Variable interest rate received	1-month Term SOFR	1-month Term SOFR
Effective date	2022-11	2022-11
Expiration date	2025-10	2025-10
Interest Rate Swap Four [Member]
Derivative [Line Items]
Date entered	2018-12	2018-06
Notional amount	$ 200,000	$ 200,000
Fixed interest rate paid	2.7715%	2.8284%
Variable interest rate received	1-month Term SOFR	1-month Term SOFR
Effective date	2022-11	2022-11
Expiration date	2027-07	2025-10
Interest Rate Swap Five [Member]
Derivative [Line Items]
Date entered		2018-12
Notional amount		$ 200,000
Fixed interest rate paid		2.7715%
Variable interest rate received		1-month Term SOFR
Effective date		2022-11
Expiration date		2027-07

(10-K22 - Summary of Signific_2

(10-K22 - Summary of Significant Accounting Policies - ) Derivative Financial Instruments - FV of Cash Flow Hedges (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Derivatives, Fair Value [Line Items]
Derivatives designated as cash flow hedges, asset derivatives	$ 24,427	$ 31,807
Derivatives designated as cash flow hedges, liability derivatives			$ (51,081)
Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Derivatives designated as cash flow hedges, asset derivatives		17,906	0
Derivatives designated as cash flow hedges, liability derivatives			(18,675)
Interest Rate Swap [Member] | Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivatives designated as cash flow hedges, liability derivatives			(18,675)
Interest Rate Swap [Member] | Other Non-Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivatives designated as cash flow hedges, liability derivatives			$ (32,406)
Interest Rate Swap [Member] | Prepaid Expenses and Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivatives designated as cash flow hedges, asset derivatives	14,872	17,906
Interest Rate Swap [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Derivatives designated as cash flow hedges, asset derivatives	$ 9,555	$ 13,901

Derivative Financial Instrume_3

Derivative Financial Instruments - Cash Flow Hedges Impact on Financial Results (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized as AOCIL on Derivatives, Net of Tax	$ 2,425	$ (32,854)	$ (56,107)	$ (17,116)	$ 47,528
Amounts reclassified into earnings, net of taxes	(2,999)	3,491	4,815	14,936	7,187
Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized as AOCIL on Derivatives, Net of Tax	2,425	(32,854)	(56,107)	(17,116)	47,528
Amounts reclassified into earnings, net of taxes	(2,999)	3,491	(4,815)	(14,936)	(7,187)
Cash Flow Hedging [Member] | Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amounts reclassified into earnings, net of taxes	(2,999)	3,491	(4,815)	(14,936)	(7,187)
Cash Flow Hedging [Member] | Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized as AOCIL on Derivatives, Net of Tax	$ 2,425	$ 32,854	$ (56,107)	$ (17,116)	$ 47,528

10-K Fair Value of Financial In

10-K Fair Value of Financial Instruments - Level 3 Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Beginning balance	$ 81,415	$ 94,308	$ 94,308	$ 71,736
Contingent consideration recorded at acquisition date	6,000	5,000	6,642	31,616
Payment of contingent consideration recorded at acquisition date	(1,319)	(3,571)	(16,911)	(12,934)
Payment of contingent consideration recorded in earnings			$ (2,982)	(520)
Payment of contingent consideration recorded in earnings, location			Impairments and other operating items
Adjustments to contingent consideration	(637)	(52)	$ (1,030)	2,954	$ 18,418
Interest accretion expense	363	353	1,417	1,470
Foreign currency translation adjustment			(29)	(14)
Ending balance	$ 85,822	$ 96,038	$ 81,415	$ 94,308	$ 71,736

Fair Value of Financial Instr_3

Fair Value of Financial Instruments - Carrying Values and Fair Values of Debt Instruments (Details) - Senior Notes [Member] - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Senior Notes due 2028
Debt Instrument [Line Items]
Carrying value of senior notes	$ 500,000	$ 500,000	$ 500,000
Fair value of senior notes	$ 491,500	$ 470,850	$ 561,350
Interest rate	4.25%	4.25%	4.25%
Senior Notes due 2029
Debt Instrument [Line Items]
Carrying value of senior notes	$ 500,000	$ 500,000	$ 500,000
Fair value of senior notes	$ 466,350	$ 457,650	$ 539,500
Interest rate	3.50%	3.50%	3.50%
Senior Notes due 2030
Debt Instrument [Line Items]
Carrying value of senior notes	$ 600,000	$ 600,000	$ 600,000
Fair value of senior notes	$ 525,060	$ 510,540	$ 610,440
Interest rate	2.60%	2.60%	2.60%
Senior Notes due 2032
Debt Instrument [Line Items]
Carrying value of senior notes	$ 650,000	$ 650,000	$ 650,000
Fair value of senior notes	$ 529,490	$ 514,540	637,065
Interest rate	2.20%	2.20%
New Senior Notes due 2032
Debt Instrument [Line Items]
Carrying value of senior notes	$ 500,000	$ 500,000	0
Fair value of senior notes	$ 444,800	$ 429,000	0
Interest rate	3.20%	3.20%
Senior Notes due 2033
Debt Instrument [Line Items]
Carrying value of senior notes	$ 750,000	$ 750,000	0
Fair value of senior notes	$ 718,275	$ 699,450	0
Interest rate	4.20%	4.20%
Senior Notes due 2050
Debt Instrument [Line Items]
Carrying value of senior notes	$ 500,000	$ 500,000	500,000
Fair value of senior notes	$ 341,300	$ 343,300	$ 496,350
Interest rate	3.05%	3.05%	3.05%
Senior Notes due 2052
Debt Instrument [Line Items]
Carrying value of senior notes	$ 850,000	$ 850,000	$ 850,000
Fair value of senior notes	$ 570,435	$ 561,425	$ 828,580
Interest rate	2.95%	2.95%	2.95%

10-K Fair Value of Financial _2

10-K Fair Value of Financial Instruments - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted cash	$ 106,625	$ 102,727	$ 72,174
Contingent consideration			(31,616)
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted cash	106,625	102,727	72,174
Restricted investments	72,784	66,402	58,797
Contingent consideration	(85,822)	(81,415)	(94,308)
Fair Value, Measurements, Recurring [Member] | Interest Rate Swap [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative instrument - net	24,427	31,807	(51,081)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted cash	106,625	102,727	72,174
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted investments	72,784	66,402	58,797
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative instrument - net	24,427	31,807	(51,081)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration	$ (85,822)	$ (81,415)	$ (94,308)

Net Income Per Share Informat_3

Net Income Per Share Information - Basic and Diluted Net Income Per Common Share (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Numerator:
Net income attributable to Waste Connections for basic and diluted earnings per share	$ 197,813	$ 180,324	$ 835,662	$ 618,047	$ 204,677
Denominator:
Basic shares outstanding	257,372,942	258,946,933	257,383,578	261,166,723	263,189,699
Dilutive effect of equity-based awards	616,029	614,050	655,223	561,747	497,840
Diluted shares outstanding	257,988,971	259,560,983	258,038,801	261,728,470	263,687,539

Fair Value Measurements (Assets

Fair Value Measurements (Assets and Liabilities Measured at Fair Value on Recurring Basis) (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted cash	$ 106,625	$ 102,727	$ 72,174
Contingent consideration			(31,616)
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted cash	106,625	102,727	72,174
Restricted investments	72,784	66,402	58,797
Contingent consideration	(85,822)	(81,415)	(94,308)
Fair Value, Measurements, Recurring [Member] | Interest Rate Swap [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative instrument - net	24,427	31,807	(51,081)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted cash	106,625	102,727	72,174
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted investments	72,784	66,402	58,797
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative instrument - net	24,427	31,807	(51,081)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration	$ (85,822)	$ (81,415)	$ (94,308)

Fair Value Measurements (Fair V

Fair Value Measurements (Fair Value for Level 3 Liabilities) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	$ 81,415	$ 94,308	$ 94,308	$ 71,736
Contingent consideration recorded at acquisition date	6,000	5,000	6,642	31,616
Payment of contingent consideration recorded at acquisition date	(1,319)	(3,571)	(16,911)	(12,934)
Payment of contingent consideration recorded in earnings			(2,982)	(520)
Adjustments to contingent consideration	(637)	(52)	(1,030)	2,954	$ 18,418
Interest accretion expense	363	353	1,417	1,470
Foreign currency translation adjustment			(29)	(14)
Ending balance	$ 85,822	$ 96,038	$ 81,415	$ 94,308	$ 71,736
Payment of contingent consideration recorded in earnings, location			Impairments and other operating items

Other Comprehensive Income (L_3

Other Comprehensive Income (Loss) (Components of Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amounts reclassified into earnings, net of taxes	$ (2,999)	$ 3,491	$ 4,815	$ 14,936	$ 7,187
Amount of Gain or (Loss) Recognized as AOCIL on Derivatives, Net of Tax	(2,425)	32,854	56,107	17,116	(47,528)
Foreign currency translation adjustment, gross	1,682	34,429	(157,336)	8,183	50,653
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Total	1,682	34,429	(157,336)	8,183	50,653
Other Comprehensive Income (Loss), before Tax	(5,697)	83,878	(74,449)	51,791	(4,233)
Other Comprehensive Income (Loss), Tax	1,955	(13,104)	(21,965)	(11,556)	14,545
Other comprehensive income (loss), net of tax	(3,742)	70,774	(96,414)	40,235	10,312
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amounts reclassified into earnings, net of taxes	(2,999)	3,491	4,815	14,936	7,187
Amount of Gain or (Loss) Recognized as AOCIL on Derivatives, Net of Tax	(2,425)	32,854	56,107	17,116	(47,528)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Total	1,682	34,429	(157,336)	8,183	50,653
Interest Rate Swap [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Interest rate swap amounts reclassified into interest expense	(4,080)	4,750	6,551	20,321	9,778
Amounts reclassified, tax	1,081	(1,259)	1,736	5,385	2,591
Amounts reclassified into earnings, net of taxes	(2,999)	3,491	(4,815)	(14,936)	(7,187)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax	(3,299)	44,699	76,336	23,287	(64,664)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax	874	(11,845)	(20,229)	(6,171)	17,136
Amount of Gain or (Loss) Recognized as AOCIL on Derivatives, Net of Tax	$ (2,425)	$ 32,854	$ 56,107	$ 17,116	$ (47,528)

10-K - Other Comprehensive Inco

10-K - Other Comprehensive Income (Loss) (Components of Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Components of Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation adjustment, gross	$ 1,682	$ 34,429	$ (157,336)	$ 8,183	$ 50,653
Foreign currency translation adjustment, net	$ 1,682	$ 34,429	$ (157,336)	$ 8,183	$ 50,653

10-K - Other Comprehensive In_2

10-K - Other Comprehensive Income (Loss) - Components of Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amount of Gain or (Loss) Recognized from AOCIL into Earnings, Net of Tax	$ 2,999	$ (3,491)	$ (4,815)	$ (14,936)	$ (7,187)
Amount of Gain or (Loss) Recognized as AOCIL on Derivatives, Net of Tax	(2,425)	32,854	56,107	17,116	(47,528)
Foreign currency translation adjustment, gross	1,682	34,429	(157,336)	8,183	50,653
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Total	1,682	34,429	(157,336)	8,183	50,653
Other Comprehensive Income (Loss), before Tax	(5,697)	83,878	(74,449)	51,791	(4,233)
Other Comprehensive Income (Loss), Tax	(1,955)	13,104	21,965	11,556	(14,545)
Other comprehensive income (loss), net of tax	(3,742)	70,774	(96,414)	40,235	10,312
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amount of Gain or (Loss) Recognized from AOCIL into Earnings, Net of Tax	2,999	(3,491)	(4,815)	(14,936)	(7,187)
Amount of Gain or (Loss) Recognized as AOCIL on Derivatives, Net of Tax	(2,425)	32,854	56,107	17,116	(47,528)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Total	1,682	34,429	(157,336)	8,183	50,653
Interest Rate Swap [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Interest rate swap amounts reclassified into interest expense	(4,080)	4,750	6,551	20,321	9,778
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax	(1,081)	1,259	(1,736)	(5,385)	(2,591)
Amount of Gain or (Loss) Recognized from AOCIL into Earnings, Net of Tax	2,999	(3,491)	4,815	14,936	7,187
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax	(3,299)	44,699	76,336	23,287	(64,664)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax	874	(11,845)	(20,229)	(6,171)	17,136
Amount of Gain or (Loss) Recognized as AOCIL on Derivatives, Net of Tax	$ (2,425)	$ 32,854	$ 56,107	$ 17,116	$ (47,528)

Other Comprehensive Income (L_4

Other Comprehensive Income (Loss) (Amounts Included in Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Components of Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity Attributable to Parent, Beginning Balance	$ 7,108,698	$ 6,988,938	$ 6,988,938
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	1,682	34,429	(157,336)	$ 8,183	$ 50,653
Stockholders' Equity Attributable to Parent, Ending Balance	7,233,995		7,108,698	6,988,938
Foreign currency translation adjustment	1,682	34,429	(157,336)	8,183	50,653
Accumulated Other Comprehensive Income (Loss) [Member]
Components of Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity Attributable to Parent, Beginning Balance	(56,830)	39,584	39,584	(651)
Amounts reclassified into earnings	(2,999)	(3,491)	4,815	14,936
Change in fair value	(2,425)	32,854	56,107	17,116
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	1,682	34,429	(157,336)	8,183	50,653
Stockholders' Equity Attributable to Parent, Ending Balance	(60,572)	110,358	(56,830)	39,584	(651)
Foreign currency translation adjustment	1,682	34,429	(157,336)	8,183	50,653
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] | Interest Rate Swap [Member]
Components of Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity Attributable to Parent, Beginning Balance	23,378	(37,544)	(37,544)	(69,596)
Amounts reclassified into earnings	(2,999)	(3,491)	4,815	14,936
Change in fair value	(2,425)	32,854	56,107	17,116
Stockholders' Equity Attributable to Parent, Ending Balance	17,954	(1,199)	23,378	(37,544)	(69,596)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] | Foreign Currency Translation Adjustment [Member]
Components of Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity Attributable to Parent, Beginning Balance	(80,208)	77,128	77,128	68,945
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	1,682	34,429	(157,336)	8,183
Stockholders' Equity Attributable to Parent, Ending Balance	(78,526)	111,557	(80,208)	77,128	$ 68,945
Foreign currency translation adjustment	$ 1,682	$ 34,429	$ (157,336)	$ 8,183

10-K - Other Comprehensive In_3

10-K - Other Comprehensive Income (Loss) (Amounts Included in Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Components of Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation adjustment	$ 1,682	$ 34,429	$ (157,336)	$ 8,183	$ 50,653

10-K - Other Comprehensive In_4

10-K - Other Comprehensive Income (Loss) - Amounts Included in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Components of Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity Attributable to Parent, Beginning Balance	$ 7,108,698	$ 6,988,938	$ 6,988,938
Foreign currency translation adjustment	1,682	34,429	(157,336)	$ 8,183	$ 50,653
Stockholders' Equity Attributable to Parent, Ending Balance	7,233,995		7,108,698	6,988,938
Accumulated Other Comprehensive Income (Loss) [Member]
Components of Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity Attributable to Parent, Beginning Balance	(56,830)	39,584	39,584	(651)
Amounts reclassified into earnings	(2,999)	(3,491)	4,815	14,936
Change in fair value	(2,425)	32,854	56,107	17,116
Foreign currency translation adjustment	1,682	34,429	(157,336)	8,183	50,653
Stockholders' Equity Attributable to Parent, Ending Balance	(60,572)	110,358	(56,830)	39,584	(651)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] | Interest Rate Swap [Member]
Components of Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity Attributable to Parent, Beginning Balance	23,378	(37,544)	(37,544)	(69,596)
Amounts reclassified into earnings	(2,999)	(3,491)	4,815	14,936
Change in fair value	(2,425)	32,854	56,107	17,116
Stockholders' Equity Attributable to Parent, Ending Balance	17,954	(1,199)	23,378	(37,544)	(69,596)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] | Foreign Currency Translation Adjustment [Member]
Components of Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity Attributable to Parent, Beginning Balance	(80,208)	77,128	77,128	68,945
Foreign currency translation adjustment	1,682	34,429	(157,336)	8,183
Stockholders' Equity Attributable to Parent, Ending Balance	$ (78,526)	$ 111,557	$ (80,208)	$ 77,128	$ 68,945

Shareholders' Equity - Narrativ

Shareholders' Equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended		3 Months Ended		5 Months Ended	6 Months Ended	7 Months Ended	12 Months Ended			72 Months Ended	79 Months Ended
	Nov. 30, 2022	Oct. 31, 2022	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Jul. 31, 2022	Dec. 31, 2016	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2022	Dec. 31, 2022	Jul. 26, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of shares under employee share purchase plan			$ 1,841	$ 1,554				$ 3,270	$ 1,222
Issuance of shares under employee share purchase plan, shares			14,594	12,015				26,582	10,813
Average daily trading volume during period						343,825
Preferred stock, shares issued					0			0			0	0
Repurchase of common stock (shares)			0	3,388,155				3,388,155	3,003,822	1,271,977
Aggregate cost of stock repurchased				$ 424,999				$ 424,999	$ 338,993	$ 105,654
Aggregate cost of common stock repurchase
Maximum remaining number of shares available for repurchase			12,859,066		12,859,066			12,859,066			12,859,066	12,859,066
Maximum number of shares authorized for repurchase													12,859,066
Share repurchase plan expiration date			Aug. 09, 2023		Aug. 09, 2023
Daily repurchase of shares, maximum						85,956
Daily Shares Repurchase (as percentage)			25%		25%			25%			25%	25%
Cash dividend per share	$ 0.255	$ 0.23	$ 0.255	$ 0.230				$ 0.945	$ 0.845	$ 0.760
Cash dividend per common share, increase	$ 0.025
Cash dividends on common stock			$ 65,788	$ 59,391				$ 243,013	$ 220,203	$ 199,883
2020 Employee Share Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum percent of eligible compensation to purchase shares			1%		1%			1%			1%	1%
Maximum percent of eligible compensation to purchase shares			10%		10%			10%			10%	10%
Maximum number of share authorized to be issued under plan			1,000,000		1,000,000			1,000,000			1,000,000	1,000,000
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrant expiration								2023
Minimum | 2020 Employee Share Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price percentage of closing price of common shares			85%					85%
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrant expiration								2027
Maximum | 2020 Employee Share Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price percentage of closing price of common shares			95%					95%
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant-date fair value of award			$ 133.46					$ 121.26	$ 100.27	$ 101.79
Units granted in period			403,026					483,281
Vested deferred RSUs outstanding			62,201	81,712	81,352			81,352	100,861	177,760	81,352	81,352
Restricted Stock Units (RSUs) | Progressive Waste Solutions Ltd.
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units granted in period			0				0				0
Awards granted in period												0
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant-date fair value of award			$ 133.30					$ 117.94	$ 96.99	$ 87.19
Units granted in period			105,581					95,038
Performance Shares | 2021 Performance-Based Restricted Share Units, Plan One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of award									3 years
Performance period end date									Dec. 31, 2023
Performance Shares | 2022 Performance-Based Restricted Share Units, Plan One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of award								3 years
Performance period end date								Dec. 31, 2024
Performance Shares | 2023 Performance-Based Restricted Share Units, Plan One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of award			3 years
Performance period end date			Dec. 31, 2025
Employee Stock Option | Progressive Waste Solutions Ltd.
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted in period			0				0				0
Deferred Share Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant-date fair value of award			$ 136.47					$ 121	$ 99.80	$ 103.81
Units granted in period			3,945					2,094
Vested deferred RSUs outstanding			30,481		26,536			26,536	24,442		26,536	26,536
Progressive Waste Solutions Ltd. | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested deferred RSUs outstanding			52,026		57,829			57,829	63,032		57,829	57,829
Progressive Waste Solutions Ltd. | Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted in period												0

Shareholders' Equity - Restrict

Shareholders' Equity - Restricted Share Units (RSUs) Activity Schedule (Details) - shares	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Restricted Stock Units (RSUs)
Unvested shares
Outstanding at beginning	81,352	100,861
Outstanding, shares at beginning	955,999	861,695
Granted	403,026	483,281
Forfeited	(13,835)	(70,126)
Vested and issued	(325,490)	(318,851)
Outstanding at ending	62,201	81,352
Outstanding, shares at ending	1,019,700	955,999
Performance Shares
Unvested shares
Outstanding, shares at beginning	341,850	392,043
Granted	105,581	95,038
Forfeited		(87,554)
Vested and issued	(140,498)	(57,677)
Outstanding, shares at ending	306,933	341,850
Progressive Waste Solutions Ltd. | Restricted Stock Units (RSUs)
Unvested shares
Outstanding at beginning	57,829	63,032
Cash settled	(5,803)	(5,203)
Outstanding at ending	52,026	57,829

Shareholders' Equity - Summary

Shareholders' Equity - Summary of Warrant and Deferred Share Unit Activity (Details) - Deferred Share Units [Member] - shares	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Warrant
Outstanding at beginning	26,536	24,442
Granted	3,945	2,094
Outstanding at ending	30,481	26,536

10-K - Shareholders' Equity (Re

10-K - Shareholders' Equity (Restricted Stock Units Activity) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Restricted Stock Units (RSUs) [Member]
Schedule of Share based Compensation Arrangements by Share based Payment Award, Equity Instruments, Other Than Options, Restricted Stock Units [Line Items]
Stock units granted	403,026	483,281
Weighted average grant-date fair value of award	$ 133.46	$ 121.26	$ 100.27	$ 101.79
Total fair value of share units vested		$ 28,751	$ 26,711	$ 23,742
Performance Shares [Member]
Schedule of Share based Compensation Arrangements by Share based Payment Award, Equity Instruments, Other Than Options, Restricted Stock Units [Line Items]
Stock units granted	105,581	95,038
Weighted average grant-date fair value of award	$ 133.30	$ 117.94	$ 96.99	$ 87.19
Total fair value of share units vested		$ 4,674	$ 10,954	$ 15,628
Deferred Share Units [Member]
Schedule of Share based Compensation Arrangements by Share based Payment Award, Equity Instruments, Other Than Options, Restricted Stock Units [Line Items]
Stock units granted	3,945	2,094
Weighted average grant-date fair value of award	$ 136.47	$ 121	$ 99.80	$ 103.81
Total fair value of share units awarded		$ 253	$ 285	$ 272

Shareholders' Equity - Summar_2

Shareholders' Equity - Summary of Vesting Activity Related to Restricted Share Units (Details) - Restricted Stock Units (RSUs) [Member] - shares	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vested over remaining service period	325,490	318,851
Forfeited	(13,835)	(70,126)
Progressive Waste Solutions Ltd. [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Cash settled	(5,803)	(5,203)

10-K - Shareholders' Equity (Su

10-K - Shareholders' Equity (Summary of Activity Related to Restricted Stock Units) (Details) - $ / shares	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Restricted Stock Units (RSUs) [Member]
Unvested shares
Outstanding at beginning	81,352	100,861	177,760
Outstanding, shares at beginning	955,999	861,695
Granted	403,026	483,281
Forfeited	(13,835)	(70,126)
Vested and issued	325,490	318,851
Outstanding at ending	62,201	81,352	100,861	177,760
Outstanding, shares at ending	1,019,700	955,999	861,695
Weighted-Average Grant Date Fair Value Per Share
Outstanding, beginning balance	$ 109.29	$ 95.63
Granted	$ 133.46	121.26	$ 100.27	$ 101.79
Forfeited		110.86
Vested and Issued		90.17
Outstanding, ending balance		$ 109.29	$ 95.63
Performance Shares [Member]
Unvested shares
Outstanding, shares at beginning	341,850	392,043
Granted	105,581	95,038
Forfeited		(87,554)
Vested and issued	140,498	57,677
Outstanding, shares at ending	306,933	341,850	392,043
Weighted-Average Grant Date Fair Value Per Share
Outstanding, beginning balance	$ 103.53	$ 91.63
Granted	$ 133.30	117.94	$ 96.99	87.19
Forfeited		80.70
Vested and Issued		81.04
Outstanding, ending balance		$ 103.53	$ 91.63
Deferred Share Units [Member]
Unvested shares
Outstanding at beginning	26,536	24,442
Granted	3,945	2,094
Outstanding at ending	30,481	26,536	24,442
Weighted-Average Grant Date Fair Value Per Share
Outstanding, beginning balance	$ 68.55	$ 64.05
Granted	$ 136.47	121	$ 99.80	$ 103.81
Outstanding, ending balance		$ 68.55	$ 64.05
Progressive Waste Solutions Ltd. [Member] | Restricted Stock Units (RSUs) [Member]
Unvested shares
Outstanding at beginning	57,829	63,032
Cash settled	(5,803)	(5,203)
Outstanding at ending	52,026	57,829	63,032

10-K - Shareholders' Equity - S

10-K - Shareholders' Equity - Summary of Stock Option Activity and Related Information (Details) - Progressive Waste Solutions Ltd. [Member] - shares	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Number of Shares (Options)
Outstanding at beginning	43,570	45,869
Cash settled	0	(2,299)
Outstanding at ending	43,570	43,570

10-K - Shareholders' Equity (_2

10-K - Shareholders' Equity (Summary of Warrant Activity) (Details) - Stock Purchase Warrants - $ / shares	12 Months Ended
	Dec. 31, 2022
Warrant
Outstanding at beginning	578,405
Granted	380,478
Forfeited	(65,331)
Exercised	(38,922)
Outstanding at ending	854,630
Weighed Average Exercise Price
Outstanding beginning balance	$ 104.82
Granted	138.33
Forfeited	80.49
Exercised	78.24
Outstanding ending balance	$ 122.81

10-K - Shareholders' Equity (_3

10-K - Shareholders' Equity (Summarized Information about Warrants Outstanding) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Class of Warrant or Right [Line Items]
Outstanding, ending balance	854,630	578,405
Stock Purchase Warrants 2017 Issuance [Member]
Class of Warrant or Right [Line Items]
Grant date	2017
Warrants issued	35,382
Exercise price, lower limit	$ 53.65
Exercise price, upper limit	$ 69.96
Fair value of warrants issued	$ 595
Outstanding, ending balance	0	1,521
Stock Purchase Warrants 2018 Issuance [Member]
Class of Warrant or Right [Line Items]
Grant date	2018
Warrants issued	163,995
Exercise price, lower limit	$ 70.91
Exercise price, upper limit	$ 80.90
Fair value of warrants issued	$ 2,591
Outstanding, ending balance	45,024	112,756
Stock Purchase Warrants 2019 Issuance [Member]
Class of Warrant or Right [Line Items]
Grant date	2019
Warrants issued	151,008
Exercise price, lower limit	$ 74.25
Exercise price, upper limit	$ 95.61
Fair value of warrants issued	$ 2,634
Outstanding, ending balance	66,977	101,977
Stock Purchase Warrants 2020 Issuance [Member]
Class of Warrant or Right [Line Items]
Grant date	2020
Warrants issued	164,890
Exercise price, lower limit	$ 72.65
Exercise price, upper limit	$ 104.89
Fair value of warrants issued	$ 3,140
Outstanding, ending balance	146,386	146,386
Stock Purchase Warrants 2021 Issuance [Member]
Class of Warrant or Right [Line Items]
Grant date	2021
Warrants issued	218,166
Exercise price, lower limit	$ 99.33
Exercise price, upper limit	$ 135.97
Fair value of warrants issued	$ 5,584
Outstanding, ending balance	215,765	215,765
Stock Purchase Warrants 2022 Issuance [Member]
Class of Warrant or Right [Line Items]
Grant date	2022
Warrants issued	380,478
Exercise price, lower limit	$ 125.32
Exercise price, upper limit	$ 143.95
Fair value of warrants issued	$ 12,972
Outstanding, ending balance	380,478	0

10-K - Shareholders' Equity (_4

10-K - Shareholders' Equity (Summary of Vesting Activity Related to Restricted Share Units) (Details) - shares	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Restricted Stock Units (RSUs) [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Forfeited	(13,835)	(70,126)
Restricted Stock Units (RSUs) [Member] | Progressive Waste Solutions Ltd. [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Cash settled	(5,803)	(5,203)
Performance Shares [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Forfeited		(87,554)

10-K - Shareholders' Equity (_5

10-K - Shareholders' Equity (Summary of Stock Option Activity and Related Information) (Details) - Progressive Waste Solutions Ltd. [Member] - shares	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Number of Shares (Options)
Outstanding at beginning	43,570	45,869
Cash settled	0	(2,299)
Outstanding at ending	43,570	43,570

Commitments and Contingencies -

Commitments and Contingencies - Narrative (Details) T in Millions				7 Months Ended	12 Months Ended
	Aug. 10, 2018 USD ($)	Jul. 17, 2018 USD ($)	Mar. 06, 2018 USD ($)	Jul. 25, 2017 USD ($)	Dec. 31, 2022 USD ($) T	Mar. 31, 2023 USD ($)
Contingencies And Commitments [Line Items]
Threshold used for disclosing environmental matters involving potential monetary sanctions					$ 1,000,000	$ 1,000,000
Minimum required threshold for disclosing environmental matters involving potential monetary sanctions					$ 300,000
Bridge and Thoroughfare Fee [Member]
Contingencies And Commitments [Line Items]
Loss contingency amount sought		$ 11,600,000	$ 83,000	$ 11,600,000
Noncompliance fee			$ 750
Chiquita Canyon, LLC [Member]
Contingencies And Commitments [Line Items]
Annual tons of waste accepted at landfill | T					2.6
Estimate of total new fees and other new taxes over the life of the conditional use permit					$ 300,000,000	$ 300,000,000
Penalties [Member] | Bridge and Thoroughfare Fee [Member]
Contingencies And Commitments [Line Items]
Fee paid	$ 83,000
Fees [Member] | Bridge and Thoroughfare Fee [Member]
Contingencies And Commitments [Line Items]
Fee paid	$ 750

Commitments and Contingencies_2

Commitments and Contingencies - Narrative (Details) gal in Millions, T in Millions				7 Months Ended	12 Months Ended
	Aug. 10, 2018 USD ($)	Jul. 17, 2018 USD ($)	Mar. 06, 2018 USD ($)	Jul. 25, 2017 USD ($)	Dec. 31, 2022 USD ($) agreement T gal	Mar. 31, 2023 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Contingencies And Commitments [Line Items]
Amount of surety bonds to secure asset closure and retirement requirements					$ 811,243,000		$ 744,037,000
Amount of surety bonds to secure performance under collection contracts and landfill operating agreements					$ 636,224,000		556,570,000
Percentage of interest in company that issues financial surety bonds					9.90%
Outstanding amount of financial surety bonds					$ 424,379,000		410,378,000
Purchase Obligation					112,136,000		100,220,000	$ 93,813,000
Environmental remediation reserve - current portion					3,165,000		2,300,000
Environmental remediation reserve-Non-current portion					$ 17,284,000		$ 20,483,000
Environmental Loss Contingency, Noncurrent, Statement of Financial Position [Extensible Enumeration]					Other Liabilities Noncurrent		Other Liabilities Noncurrent
Unrecorded unconditional purchase obligation, remaining volume | gal					57.9
Purchase commitment					$ 184,918,000
Minimum required threshold for disclosing environmental matters involving potential monetary sanctions					300,000
Threshold used for disclosing environmental matters involving potential monetary sanctions					$ 1,000,000	$ 1,000,000
Number of collective bargaining agreements expired or set to expire | agreement					17
Bridge and Thoroughfare Fee [Member]
Contingencies And Commitments [Line Items]
Loss contingency amount sought		$ 11,600,000	$ 83,000	$ 11,600,000
Noncompliance fee			$ 750
Chiquita Canyon, LLC [Member]
Contingencies And Commitments [Line Items]
Annual tons of waste accepted at landfill | T					2.6
Estimate of total new fees and other new taxes over the life of the conditional use permit					$ 300,000,000	$ 300,000,000
Penalties [Member] | Bridge and Thoroughfare Fee [Member]
Contingencies And Commitments [Line Items]
Fee paid	$ 83,000
Monthly payment estimate	83,000
Fees [Member] | Bridge and Thoroughfare Fee [Member]
Contingencies And Commitments [Line Items]
Fee paid	750
Monthly payment estimate	$ 750

Commitments and Contingencies_3

Commitments and Contingencies - Future Minimum Purchase Commitments (Details) $ in Thousands	Dec. 31, 2022 USD ($)
Commitments and Contingencies [Abstract]
2023	$ 149,858
2024	35,060
Total purchase commitment	$ 184,918

Subsequent Events (Details)

Subsequent Events (Details)				3 Months Ended	12 Months Ended	36 Months Ended
	Apr. 26, 2023 $ / shares	Apr. 01, 2023 segment	Feb. 15, 2023 $ / shares	Mar. 31, 2023 segment	Dec. 31, 2022 segment	Dec. 31, 2022 segment
Subsequent Event [Line Items]
Number of Operating Segments | segment		6		6	6	6
Dividends, date of record	May 10, 2023		Mar. 01, 2023
Dividends, date to be paid	May 24, 2023		Mar. 15, 2023
Dividends per share amount | $ / shares	$ 0.255		$ 0.255
Dividends, declared date	Apr. 26, 2023		Feb. 15, 2023

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current assets:
Cash and equivalents	$ 133,860	$ 78,637		$ 147,441
Accounts receivable, net of allowance for credit losses of $22,939 and $18,480 at December 31, 2022 and 2021, respectively	814,680	833,862		709,614
Prepaid expenses and other current assets	185,718	205,146		175,722
Total current assets	1,134,258	1,117,645		1,032,777
Restricted cash	106,625	102,727		72,174
Restricted investments	74,358	68,099		59,014
Property and equipment, net	6,956,620	6,950,915		5,721,949
Operating lease right-of-use assets	195,030	192,506		160,567
Goodwill	6,940,567	6,902,297	$ 6,427,763	6,187,643	$ 5,726,650
Intangible assets, net	1,697,193	1,673,917		1,350,597
Other assets, net	122,443	126,497		115,203
Total assets	17,227,094	17,134,603		14,699,924	13,992,364
Current liabilities:
Accounts payable	526,229	638,728		392,868
Book overdraft	21,067	15,645		16,721
Deferred revenue	336,613	325,002		273,720
Accrued liabilities	390,195	431,247		442,596
Current portion of operating lease liabilities	34,078	35,170		38,017
Current portion of contingent consideration	64,489	60,092		62,804
Current portion of long-term debt and notes payable	10,513	6,759		6,020
Total current liabilities	1,383,184	1,512,643		1,232,746
Long-term debt and notes payable	6,921,839	6,890,149		5,040,500
Long-term portion of operating lease liabilities	169,051	165,462		129,628
Long-term portion of contingent consideration	21,333	21,323		31,504
Deferred income taxes	1,041,152	1,013,742		850,921
Other long-term liabilities	451,571	417,640		421,080
Total liabilities	9,988,130	10,020,959		7,706,379
Commitments and contingencies (Note 13)
Equity:
Common shares: 257,211,175 shares issued and 257,145,716 shares outstanding at December 31, 2022; 260,283,158 shares issued and 260,212,496 shares outstanding at December 31, 2021	3,274,564	3,271,958		3,693,027
Additional paid-in capital	238,484	244,076		199,482
Accumulated other comprehensive income	(60,572)	(56,830)		39,584
Treasury shares: 65,459 and 70,662 shares at December 31, 2022 and 2021, respectively
Retained earnings	3,781,519	3,649,494		3,056,845
Total Waste Connections' equity	7,233,995	7,108,698		6,988,938
Noncontrolling interest in subsidiaries	4,969	4,946		4,607
Total equity	7,238,964	7,113,644	$ 6,759,059	6,993,545	$ 6,863,438	$ 6,938,354
Total liabilities and equity	$ 17,227,094	$ 17,134,603		$ 14,699,924

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement Of Financial Position [Abstract]
Allowance for credit losses	$ 22,239	$ 22,939	$ 18,480
Common shares, shares issued	257,547,090	257,211,175	260,283,158
Common shares, shares outstanding	257,487,434	257,145,716	260,212,496
Treasury shares	59,656	65,459	70,662

Consolidated Statements of Net

Consolidated Statements of Net Income - USD ($) $ in Thousands	1 Months Ended		3 Months Ended		12 Months Ended
	Nov. 30, 2022	Oct. 31, 2022	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Statement [Abstract]
Revenues			$ 1,900,503	$ 1,646,255	$ 7,211,859	$ 6,151,361	$ 5,445,990
Operating expenses:
Cost of operations			1,146,941	989,518	4,336,012	3,654,074	3,276,808
Selling, general and administrative			193,667	163,414	696,467	612,337	537,632
Depreciation			204,059	179,950	763,285	673,730	621,102
Amortization of intangibles			39,282	37,635	155,675	139,279	131,302
Impairments and other operating items			1,865	1,878	18,230	32,316	466,718
Operating income			314,689	273,860	1,242,190	1,039,625	412,428
Interest expense			(68,353)	(41,324)	(202,331)	(162,796)	(162,375)
Interest income			2,715	137	5,950	2,916	5,253
Other income (expense), net			3,174	(3,466)	3,154	6,285	(1,392)
Loss on early extinguishment of debt					0	(115,288)	0
Income before income tax provision			252,225	229,207	1,048,963	770,742	253,914
Income tax provision			(54,389)	(48,839)	(212,962)	(152,253)	(49,922)
Net income			197,836	180,368	836,001	618,489	203,992
Plus (less): Net loss (income) attributable to noncontrolling interests			(23)	(44)	(339)	(442)	685
Net income attributable to Waste Connections			$ 197,813	$ 180,324	$ 835,662	$ 618,047	$ 204,677
Earnings per common share attributable to Waste Connections' common shareholders:
Basic			$ 0.77	$ 0.70	$ 3.25	$ 2.37	$ 0.78
Diluted			$ 0.77	$ 0.69	$ 3.24	$ 2.36	$ 0.78
Shares used in the per share calculations:
Basic			257,372,942	258,946,933	257,383,578	261,166,723	263,189,699
Diluted			257,988,971	259,560,983	258,038,801	261,728,470	263,687,539
Cash dividends per common share	$ 0.255	$ 0.23	$ 0.255	$ 0.230	$ 0.945	$ 0.845	$ 0.760

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Net income	$ 197,836	$ 180,368	$ 836,001	$ 618,489	$ 203,992
Other comprehensive income (loss), before tax:
Foreign currency translation adjustment	1,682	34,429	(157,336)	8,183	50,653
Other comprehensive income (loss), before tax	(5,697)	83,878	(74,449)	51,791	(4,233)
Income tax (expense) benefit related to items of other comprehensive income (loss)	1,955	(13,104)	(21,965)	(11,556)	14,545
Other comprehensive income (loss), net of tax	(3,742)	70,774	(96,414)	40,235	10,312
Comprehensive income	194,094	251,142	739,587	658,724	214,304
Plus (less): Comprehensive loss (income) attributable to noncontrolling interests	(23)	(44)	(339)	(442)	685
Comprehensive income attributable to Waste Connections	194,071	251,098	739,248	658,282	214,989
Interest Rate Swap [Member]
Other comprehensive income (loss), before tax:
Interest rate swap amounts reclassified into interest expense	(4,080)	4,750	6,551	20,321	9,778
Changes in fair value of interest rate swaps	$ (3,299)	$ 44,699	$ 76,336	$ 23,287	$ (64,664)

Consolidated Statements of Equi

Consolidated Statements of Equity - USD ($) $ in Thousands	Common Stock [Member] Performance Shares [Member]	Common Stock [Member] Deferred Compensation Plan [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock, Common [Member]	Retained Earnings [Member]	Noncontrolling Interests [Member]	Total
Cumulative effect adjustment from adoption of new accounting pronouncement			$ 4,135,343	$ 154,917	$ (10,963)		$ 2,654,207	$ 4,850	$ 6,938,354
Beginning Balances at Dec. 31, 2019			$ 4,135,343	154,917	(10,963)		2,654,207	4,850	6,938,354
Beginning Balances, shares at Dec. 31, 2019			263,618,161
Beginning Balance, treasury shares at Dec. 31, 2019						81,514
Sale of common shares held in trust			$ 679						679
Sale of common shares held in trust, shares			7,330			(7,330)
Vesting of restricted share units (shares)	281,186	23,857	377,006
Fair value adjustment for common shares in deferred compensation plan exchanged for other investment options				(678)					(678)
Tax withholdings related to net share settlements of equity-based compensation				(23,446)					(23,446)
Tax withholdings related to net share settlements of equity-based compensation, shares			(230,698)
Equity-based compensation				39,762					$ 39,762
Exercise of warrants			20,125
Repurchase of common shares (shares)			(1,271,977)						(1,271,977)
Repurchase of common shares			$ (105,654)						$ (105,654)
Cash dividends on common shares							(199,883)		(199,883)
Amounts reclassified into earnings, net of taxes					7,187				7,187
Changes in fair value of cash flow hedges, net of taxes					(47,528)				(47,528)
Foreign currency translation adjustment					50,653				50,653
Net income							204,677	(685)	203,992
Ending Balances at Dec. 31, 2020			$ 4,030,368	170,555	(651)		2,659,001	4,165	6,863,438
Ending Balances, shares at Dec. 31, 2020			262,824,990
Ending Balance, treasury shares at Dec. 31, 2020						74,184
Cumulative effect adjustment from adoption of new accounting pronouncement			$ 4,030,368	170,555	(651)		2,659,001	4,165	6,863,438
Sale of common shares held in trust			$ 430						430
Sale of common shares held in trust, shares			3,522			(3,522)
Vesting of restricted share units (shares)	154,251	19,510	343,480
Fair value adjustment for common shares in deferred compensation plan exchanged for other investment options				(1,177)					(1,177)
Tax withholdings related to net share settlements of equity-based compensation				(18,606)					(18,606)
Tax withholdings related to net share settlements of equity-based compensation, shares			(186,978)
Equity-based compensation				48,710					$ 48,710
Exercise of warrants			46,730
Repurchase of common shares (shares)			(3,003,822)						(3,003,822)
Repurchase of common shares			$ (338,993)						$ (338,993)
Issuance of shares under employee share purchase plan			$ 1,222						$ 1,222
Issuance of shares under employee share purchase plan, shares			10,813						10,813
Cash dividends on common shares							(220,203)		$ (220,203)
Amounts reclassified into earnings, net of taxes					14,936				14,936
Changes in fair value of cash flow hedges, net of taxes					17,116				17,116
Foreign currency translation adjustment					8,183				8,183
Net income							618,047	442	618,489
Ending Balances at Dec. 31, 2021			$ 3,693,027	199,482	39,584		3,056,845	4,607	$ 6,993,545
Ending Balances, shares at Dec. 31, 2021			260,212,496						260,212,496
Ending Balance, treasury shares at Dec. 31, 2021						70,662			70,662
Cumulative effect adjustment from adoption of new accounting pronouncement			$ 3,693,027	199,482	39,584		3,056,845	4,607	$ 6,993,545
Sale of common shares held in trust			$ 305						305
Sale of common shares held in trust, shares			2,203			(2,203)
Vesting of restricted share units (shares)			312,706
Tax withholdings related to net share settlements of equity-based compensation				(17,236)					(17,236)
Tax withholdings related to net share settlements of equity-based compensation, shares			(143,243)
Equity-based compensation				14,139					$ 14,139
Exercise of warrants			11,560
Repurchase of common shares (shares)			(3,388,155)						(3,388,155)
Repurchase of common shares			$ (424,999)						$ (424,999)
Issuance of shares under employee share purchase plan			$ 1,554						$ 1,554
Issuance of shares under employee share purchase plan, shares			12,015						12,015
Cash dividends on common shares							(59,391)		$ (59,391)
Amounts reclassified into earnings, net of taxes					3,491				3,491
Changes in fair value of cash flow hedges, net of taxes					32,854				32,854
Foreign currency translation adjustment					34,429				34,429
Net income							180,324	44	180,368
Ending Balances at Mar. 31, 2022			$ 3,269,887	196,385	110,358		3,177,778	4,651	6,759,059
Ending Balances, shares at Mar. 31, 2022			257,096,408
Ending Balance, treasury shares at Mar. 31, 2022						68,459,000
Beginning Balances at Dec. 31, 2021			$ 3,693,027	199,482	39,584		3,056,845	4,607	$ 6,993,545
Beginning Balances, shares at Dec. 31, 2021			260,212,496						260,212,496
Beginning Balance, treasury shares at Dec. 31, 2021						70,662			70,662
Sale of common shares held in trust			$ 660						$ 660
Sale of common shares held in trust, shares			5,203			(5,203)
Vesting of restricted share units (shares)	57,677	19,509	318,851
Tax withholdings related to net share settlements of equity-based compensation				(18,358)					(18,358)
Tax withholdings related to net share settlements of equity-based compensation, shares			(210,700)
Equity-based compensation				62,952					$ 62,952
Exercise of warrants			104,253
Repurchase of common shares (shares)			(3,388,155)						(3,388,155)
Repurchase of common shares			$ (424,999)						$ (424,999)
Issuance of shares under employee share purchase plan			$ 3,270						$ 3,270
Issuance of shares under employee share purchase plan, shares			26,582						26,582
Cash dividends on common shares							(243,013)		$ (243,013)
Amounts reclassified into earnings, net of taxes					4,815				4,815
Changes in fair value of cash flow hedges, net of taxes					56,107				56,107
Foreign currency translation adjustment					(157,336)				(157,336)
Net income							835,662	339	836,001
Ending Balances at Dec. 31, 2022			$ 3,271,958	244,076	(56,830)		3,649,494	4,946	$ 7,113,644
Ending Balances, shares at Dec. 31, 2022			257,145,716						257,145,716
Ending Balance, treasury shares at Dec. 31, 2022						65,459			65,459
Cumulative effect adjustment from adoption of new accounting pronouncement			$ 3,269,887	196,385	110,358		3,177,778	4,651	$ 6,759,059
Cumulative effect adjustment from adoption of new accounting pronouncement			3,271,958	244,076	(56,830)		3,649,494	4,946	7,113,644
Sale of common shares held in trust			$ 765						765
Sale of common shares held in trust, shares			5,803			(5,803)
Vesting of restricted share units (shares)			325,490
Tax withholdings related to net share settlements of equity-based compensation				(22,966)					(22,966)
Tax withholdings related to net share settlements of equity-based compensation, shares			(176,837)
Equity-based compensation				17,374					$ 17,374
Exercise of warrants			13,019
Repurchase of common shares (shares)									0
Issuance of shares under employee share purchase plan			$ 1,841						$ 1,841
Issuance of shares under employee share purchase plan, shares			14,594						14,594
Cash dividends on common shares							(65,788)		$ (65,788)
Amounts reclassified into earnings, net of taxes					(2,999)				(2,999)
Changes in fair value of cash flow hedges, net of taxes					(2,425)				(2,425)
Foreign currency translation adjustment					1,682				1,682
Net income							197,813	23	197,836
Ending Balances at Mar. 31, 2023			$ 3,274,564	238,484	(60,572)		3,781,519	4,969	$ 7,238,964
Ending Balances, shares at Mar. 31, 2023			257,487,434						257,487,434
Ending Balance, treasury shares at Mar. 31, 2023						59,656			59,656
Cumulative effect adjustment from adoption of new accounting pronouncement			$ 3,274,564	$ 238,484	$ (60,572)		$ 3,781,519	$ 4,969	$ 7,238,964

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities:
Net income	$ 197,836	$ 180,368	$ 836,001	$ 618,489	$ 203,992
Adjustments to reconcile net income to net cash provided by operating activities:
Loss on disposal of assets and impairments	1,910	2,090	9,519	27,727	445,647
Depreciation	204,059	179,950	763,285	673,730	621,102
Amortization of intangibles	39,282	37,635	155,675	139,279	131,302
Loss on early extinguishment of debt			0	115,288	0
Deferred income taxes, net of acquisitions	28,229	38,378	93,481	14,563	(50,487)
Current period provision for expected credit losses	2,247	3,022	17,353	9,719	15,509
Amortization of debt issuance costs	1,621	1,195	5,454	5,055	7,509
Share-based compensation	18,469	14,635	63,485	58,221	45,751
Interest accretion	4,884	4,448	17,668	15,970	17,205
Payment of contingent consideration recorded in earnings			(2,982)	(520)	(10,371)
Adjustments to contingent consideration	(637)	(52)	(1,030)	2,954	18,418
Other	(2,937)	382	(8,217)	(1,260)	2,426
Changes in operating assets and liabilities, net of effects from acquisitions:
Net change in operating assets and liabilities, net of acquisitions	(52,605)	(21,154)
Accounts receivable, net			(100,546)	(54,688)	31,332
Prepaid expenses and other current assets			(752)	(8,229)	(17,749)
Accounts payable			192,850	66,752	(148,362)
Deferred revenue			42,252	31,707	14,981
Accrued liabilities			(28,082)	3,853	88,612
Increase (Decrease) in Asset Retirement Obligations			(18,881)	(21,040)	(6,484)
Increase (Decrease) in Other Operating Liabilities			(14,041)	659	(1,812)
Net cash provided by operating activities	442,358	440,897	2,022,492	1,698,229	1,408,521
Cash flows from investing activities:
Payments for acquisitions, net of cash acquired	(144,611)	(355,212)	(2,206,901)	(960,449)	(388,789)
Capital expenditures for property and equipment	(175,786)	(152,318)	(912,677)	(744,315)	(597,053)
Capital expenditure for undeveloped landfill property			0	0	(67,508)
Investments in noncontrolling interests			0	(25,000)	0
Proceeds from disposal of assets	1,260	15,012	30,676	42,768	19,084
Other	1,378	2,637	1,731	(6,486)	(11,777)
Net cash used in investing activities	(317,759)	(489,881)	(3,087,171)	(1,693,482)	(1,046,043)
Cash flows from financing activities:
Proceeds from long-term debt	336,649	1,305,288	4,816,146	2,112,193	1,815,625
Principal payments on notes payable and long-term debt	(320,027)	(505,597)	(3,073,985)	(1,893,100)	(1,542,958)
Premiums paid on early extinguishment of debt			0	(110,617)	0
Payment of contingent consideration recorded at acquisition date	(1,319)	(3,571)	(16,911)	(12,934)	(12,566)
Change in book overdraft	5,421	87	(1,076)	(367)	1,096
Payments for repurchase of common shares		(424,999)	(424,999)	(338,993)	(105,654)
Payments for cash dividends	(65,788)	(59,391)	(243,013)	(220,203)	(199,883)
Tax withholdings related to net share settlements of equity-based compensation	(22,966)	(17,236)	(18,358)	(18,606)	(23,446)
Debt issuance costs		(4,382)	(13,271)	(18,521)	(11,117)
Proceeds from issuance of shares under employee share purchase plan	1,841	1,554	3,270	1,222	0
Proceeds from sale of common shares held in trust	765	305	660	430	679
Net cash provided by (used in) financing activities	(65,424)	292,058	1,028,463	(499,496)	(78,224)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(54)	595	(2,035)	(25)	6,914
Net increase in cash, cash equivalents and restricted cash	59,121	243,669	(38,251)	(494,774)	291,168
Cash, cash equivalents and restricted cash at beginning of period	181,364	219,615	219,615	714,389	423,221
Cash, cash equivalents and restricted cash at end of period	240,485	463,284	181,364	219,615	714,389
SUPPLEMENTARY DISCLOSURES OF CASH FLOW INFORMATION AND NON-CASH TRANSACTIONS:
Cash paid for income taxes			100,156	146,198	104,618
Cash paid for interest			177,424	157,485	142,310
Changes in accrued capital expenditures for property and equipment			36,671	22,153	(10,940)
In connection with its acquisitions, the Company assumed liabilities as follows:
Fair value of assets acquired			2,471,202	1,230,396	514,234
Payments for acquisitions, net of cash acquired	(144,611)	(355,212)	(2,206,901)	(960,449)	(388,789)
Change in open working capital settlements at year end			0	0	(1,505)
Liabilities assumed and notes payable issued to sellers of businesses acquired	$ 34,224	$ 40,122	$ 264,301	$ 269,947	$ 123,940

Business

Business	12 Months Ended
	Dec. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business	1. BUSINESS The financial statements presented in this report represent the consolidation of Waste Connections, Inc., a corporation organized under the laws of Ontario, Canada, and its wholly-owned and majority-owned subsidiaries. When the terms the “Company” or “Waste Connections” are used in this document, those terms refer to Waste Connections, Inc. and its consolidated subsidiaries. All significant intercompany accounts and transactions have been eliminated in consolidation. The Company is an integrated solid waste services company that provides non-hazardous waste collection, transfer and disposal services, along with resource recovery primarily through recycling and renewable

New Accounting Standards_2

New Accounting Standards	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
New Accounting Standards
New Accounting Standards and Reclassifications	3. Accounting Standards Pending Adoption Clawback of Executive Compensation Rules ​	2. NEW ACCOUNTING STANDARDS Accounting Standards Adopted Reference Rate Reform – Facilitation of the Effects of Reference Rate Reform on Financial Reporting . In March 2020, the Financial Accounting Standards Board (“FASB”) issued guidance to provide temporary optional expedients and exceptions to the guidance in GAAP on contract modifications and hedge accounting to ease the financial reporting burdens related to the expected market transition from the London Interbank Offered Rate (“LIBOR”) and other interbank offered rates to alternative reference rates, such as the Secured Overnight Financing Rate (“SOFR”). One-week and two-month U.S. dollar LIBOR settings as well as all non-U.S. dollar LIBOR settings stopped being published on December 31, 2021, while the remaining U.S. dollar LIBOR settings will be discontinued on June 30, 2023. Under the new guidance, entities can elect not to apply certain modification accounting requirements to contracts affected by reference rate reform, if certain criteria are met. An entity that makes this election would not have to remeasure the contracts at the modification date or reassess a previous accounting determination. Under the guidance, entities can also elect various optional expedients that would allow them to continue applying hedge accounting for hedging relationships affected by reference rate reform, if certain criteria are met. The guidance was effective upon issuance. The guidance on contract modifications was applied prospectively from March 12, 2020. The guidance on hedging is applied to eligible hedging relationships existing as of the beginning of the interim period that includes the effective date and to new eligible hedging relationships entered into after the beginning of that interim period. The relief is temporary and generally cannot be applied to contract modifications that occur after December 31, 2024 or hedging relationships entered into or evaluated after that date. However, certain optional expedients can be applied to hedging relationships evaluated in periods after December 31, 2024. In October 2022, the Company adopted the applicable practical expedients of the standard when it converted the option of a LIBOR interest rate in its Credit Agreement to a SOFR interest rate and correspondingly amended its five interest rate swap agreements that are specifically designated to the amended Credit Agreement. As permitted by the practical expedients in the standard, the Company maintained cash flow hedge accounting for its interest rate swap agreements as the conversion of the LIBOR interest rate to SOFR was the only modification to the interest rate swap agreements. The Company determined that the new guidance did not have a material effect on its consolidated financial statements. See Note 11 for further details on the amendment to the Credit Agreement . Accounting Standards Pending Adoption Clawback of Executive Compensation Rules providing for the recovery of incentive-based compensation received by current and former executive officers in the event of a required accounting restatement when that compensation was based on an erroneously reported financial reporting measure. The new rule and related amendments include a number of new disclosure requirements, including requiring issuers to file their recovery policy as an exhibit to their annual reports and establishing new cover page disclosures on Form 10-K indicating whether the financial statements included in the filing reflect the correction of an error and whether the error correction required an incentive-based compensation recovery analysis. The exchanges must file proposed listing standards to implement the SEC’s directive no later than February 26, 2023 (which is 90 days after the final rules were published in the Federal Register), and those listing standards must be effective no later than November 28, 2023. Affected issuers will be required to adopt a recovery policy no later than 60 days after the listing standards become effective.

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2022
Basis of Presentation and Summary [Abstract]
Summary of Significant Accounting Policies	3. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Reporting Currency The functional currency of the Company, as the parent corporate entity, and its operating subsidiaries in the United States, is the U.S. dollar. The functional currency of the Company’s Canadian operations is the Canadian dollar. The reporting currency of the Company is the U.S. dollar. The Company’s consolidated Canadian dollar financial position is translated to U.S. dollars by applying the foreign currency exchange rate in effect at the consolidated balance sheet date. The Company’s consolidated Canadian dollar results of operations and cash flows are translated to U.S. dollars by applying the average foreign currency exchange rate in effect during the reporting period. The resulting translation adjustments are included in other comprehensive income or loss. Gains and losses from foreign currency transactions are included in earnings for the period. Cash Equivalents The Company considers all highly liquid investments with a maturity of three months or less at purchase to be cash equivalents. As of December 31, 2022 and 2021, cash equivalents consisted of demand money market accounts. Concentrations of Credit Risk Financial instruments that potentially subject the Company to concentrations of credit risk consist primarily of cash and equivalents, restricted cash, restricted investments and accounts receivable. The Company maintains cash and equivalents with banks that at times exceed applicable insurance limits. The Company reduces its exposure to credit risk by maintaining such deposits with high quality financial institutions. The Company’s restricted cash and restricted investments are invested primarily in money market accounts, bank time deposits, U.S. government and agency securities and Canadian bankers’ acceptance notes. The Company has not experienced any losses related to its cash and equivalents, restricted cash or restricted investment accounts. The Company generally does not require collateral on its trade receivables. Credit risk on accounts receivable is minimized as a result of the large and diverse nature of the Company’s customer base. The Company maintains allowances for credit losses based on the expected collectability of accounts receivable. Revenue Recognition and Accounts Receivable The Company’s operations primarily consist of providing non-hazardous waste collection, transfer, disposal and recycling services, E&P services, and intermodal services. The following table disaggregates the Company’s revenues by service line for the periods indicated: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ 2022 2021 2020 Commercial $ 2,176,295 ​ $ 1,813,426 $ 1,610,313 Residential ​ ​ 1,891,108 ​ ​ 1,673,819 ​ ​ 1,528,217 Industrial and construction roll off ​ ​ 1,183,624 ​ ​ 954,181 ​ ​ 833,148 Total collection ​ ​ 5,251,027 ​ ​ 4,441,426 ​ ​ 3,971,678 Landfill ​ ​ 1,328,942 ​ ​ 1,233,499 ​ ​ 1,146,732 Transfer ​ ​ 1,026,050 ​ ​ 859,113 ​ ​ 777,754 Recycling ​ ​ 204,876 ​ ​ 205,076 ​ ​ 86,389 E&P ​ ​ 210,562 ​ ​ 138,707 ​ ​ 159,438 Intermodal and other ​ ​ 188,471 ​ ​ 152,194 ​ ​ 118,396 Intercompany ​ ​ (998,069) ​ ​ (878,654) ​ ​ (814,397) Total $ 7,211,859 ​ $ 6,151,361 $ 5,445,990 ​ The factors that impact the timing and amount of revenue recognized for each service line may vary based on the nature of the service performed. Generally, the Company recognizes revenue at the time it performs a service. In the event that the Company bills for services in advance of performance, it recognizes deferred revenue for the amount billed and subsequently recognizes revenue at the time the service is provided. See Note 17 for additional information regarding revenue by reportable segment. Revenue by Service Line Solid Waste Collection The Company’s solid waste collection business involves the collection of waste from residential, commercial and industrial customers for transport to transfer stations, or directly to landfills or recycling centers. Solid waste collection services include both recurring and temporary customer relationships. The services are performed under service agreements, municipal contracts or franchise agreements with governmental entities. Existing franchise agreements and most of the existing municipal contracts give the Company the exclusive right to provide specified waste services in the specified territory during the contract term. These exclusive arrangements are awarded, at least initially, on a competitive bid basis and subsequently on a bid or negotiated basis. The standard customer service agreements generally range from one In general, residential collection fees are billed monthly or quarterly in advance. Substantially all of the deferred revenue recorded as of September 30, 2022 was recognized as revenue during the three months ended December 31, 2022 when the service was performed. Commercial customers are typically billed on a monthly basis based on the nature of the services provided during the period. Revenue recognized under these agreements is variable in nature based on the number of residential homes or businesses serviced during the period, the frequency of collection and the volume of waste collected. In addition, certain contracts have annual price escalation clauses that are tied to changes in an underlying base index such as a consumer price index which are unknown at contract inception. Solid waste collection revenue from sources other than customer contracts primarily relates to lease revenue associated with compactors. Revenue from these leasing arrangements was not material and represented an insignificant amount of total revenue for each of the reported periods. Landfill and Transfer Station Revenue at landfills is primarily generated by charging tipping fees on a per ton and/or per yard basis to third parties based on the volume disposed and the nature of the waste. In general, fees are variable in nature and revenue is recognized at the time the waste is disposed at the facility. Revenue at transfer stations is primarily generated by charging tipping or disposal fees on a per ton and/or per yard basis. The fees charged to third parties are based primarily on the market, type and volume or weight of the waste accepted, the distance to the disposal facility and the cost of disposal. In general, fees are billed and revenue is recognized at the time the service is performed. Revenue recognized under these agreements is variable in nature based on the volume of waste accepted at the transfer facility. Many of the Company’s landfill and transfer station customers have entered into one Solid Waste Recycling Solid waste recycling revenues result from the sale of recycled commodities, which are generated by offering residential, commercial, industrial and municipal customers recycling services for a variety of recyclable materials, including compost, cardboard, mixed paper, plastic containers, glass bottles and ferrous and aluminum metals. The Company owns and operates recycling operations and markets collected recyclable materials to third parties for processing before resale. In some instances, the Company utilizes a third party to market recycled materials. In certain instances, the Company issues recycling rebates to municipal or commercial customers, which can be based on the price it receives upon the sale of recycled commodities, a fixed contractual rate or other measures. The Company also receives rebates when it disposes of recycled commodities at third-party facilities. The fees received are based primarily on the market, type and volume or weight of the materials sold. In general, fees are billed and revenue is recognized at the time title is transferred. Revenue recognized under these agreements is variable in nature based on the volume of materials sold. In addition, the amount of revenue recognized is based on commodity prices at the time of sale, which are unknown at contract inception. E&P Waste Treatment, Recovery and Disposal E&P waste revenue is primarily generated through the treatment, recovery and disposal of non-hazardous exploration and production waste from vertical and horizontal drilling, hydraulic fracturing, production and clean-up activity, as well as other services. Revenue recognized under these agreements is variable in nature based on the volume of waste accepted or processed during the period. Intermodal and Other Intermodal revenue is primarily generated through providing intermodal services for the rail haul movement of cargo and solid waste containers in the Pacific Northwest through a network of intermodal facilities. The fees received for intermodal services are based on negotiated rates and vary depending on volume commitments by the shipper and destination. In general, fees are billed and revenue is recognized upon delivery. Other revenues consist primarily of the sale of methane gas and renewable energy credits generated from the Company’s MSW landfills. Revenue Recognition Service obligations of a long-term nature, such as solid waste collection service contracts, are satisfied over time, and revenue is recognized based on the value provided to the customer during the period. In many of our markets, solid waste collection service contracts exist as exclusive franchise agreements or municipal contracts. The amount billed to the customer is based on variable elements such as the number of residential homes or businesses for which collection services are provided, the volume of waste collected, transported and disposed, and the nature of the waste accepted. Such contracts are generally within the Company’s collection, recycling and other lines of business and have a weighted average remaining contract life of approximately four years, excluding certain exclusive and perpetual agreements, such as governmental certificates . Additionally, certain elements of long-term customer contracts are unknown upon entering into the contract, including the amount that will be billed in accordance with annual price escalation clauses, fuel recovery fee programs and commodity prices. The amount to be billed is often tied to changes in an underlying base index such as a consumer price index or a fuel or commodity index, and revenue is recognized once the index is established for the period. Accounts Receivable Accounts receivable are recorded when billed or accrued and represent claims against third parties that will be settled in cash. The carrying value of the Company’s receivables, net of the allowance for credit losses, represents their estimated net realizable value. The allowance for credit losses is based on management’s assessment of the collectability of assets pooled together with similar risk characteristics. The Company monitors the collectability of its trade receivables as one overall pool due to all trade receivables having similar risk characteristics. The Company estimates its allowance for credit losses based on historical collection trends, the age of outstanding receivables, geographical location of the customer, existing economic conditions and reasonable forecasts. If events or changes in circumstances indicate that specific receivable balances may be impaired, further consideration is given to the collectability of those balances and the allowance is adjusted accordingly. Past-due receivable balances are written off when the Company’s internal collection efforts have been unsuccessful in collecting the amount due. The following is a rollforward of the Company’s allowance for credit losses for the periods indicated: ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ ​ 2022 2021 Beginning balance ​ $ 18,480 ​ $ 19,380 Current period provision for expected credit losses ​ ​ 17,353 ​ ​ 9,719 Write-offs charged against the allowance ​ ​ (18,273) ​ ​ (15,545) Recoveries collected ​ ​ 5,473 ​ ​ 4,918 Impact of changes in foreign currency ​ ​ (94) ​ ​ 8 Ending balance ​ $ 22,939 ​ $ 18,480 ​ Contract Acquisition Costs The incremental direct costs of obtaining a contract, which consist of sales incentives, are recognized as Other assets in the Company’s Consolidated Balance Sheet, and are amortized to Selling, general and administrative expense over the estimated life of the relevant customer relationship, which ranges from one Company would have recognized is one year or less. The Company had $23,818 and $18,954 of deferred sales incentives at December 31, 2022 and 2021, respectively. During the years ended December 31, 2022, 2021 and 2020, the Company recorded a total of $22,675, $23,671 and $17,138, respectively, of sales incentive amortization expense for deferred sales incentives and sales incentive expense for contracts with original terms of less than one year. Property and Equipment Property and equipment are stated at cost. Improvements or betterments, not considered to be maintenance and repair, which add new functionality or significantly extend the life of an asset are capitalized. Third-party expenditures related to pending development projects, such as legal and engineering expenses, are capitalized. Expenditures for maintenance and repair costs, including planned major maintenance activities, are charged to expense as incurred. The cost of assets retired or otherwise disposed of and the related accumulated depreciation are eliminated from the accounts in the year of disposal. Gains and losses resulting from disposals of property and equipment are recognized in the period in which the property and equipment is disposed. Depreciation is computed using the straight-line method over the estimated useful lives of the assets or the lease term, whichever is shorter. The estimated useful lives are as follows: ​ ​ ​ ​ Buildings 10 Leasehold and land improvements 3 Machinery and equipment 3 Rolling stock 3 Containers 3 ​ Landfill Accounting The Company utilizes the life cycle method of accounting for landfill costs. This method applies the costs to be capitalized associated with acquiring, developing, closing and monitoring the landfills over the associated consumption of landfill capacity. The Company utilizes the units of consumption method to amortize landfill development costs over the estimated remaining capacity of a landfill. Under this method, the Company includes future estimated construction costs using current dollars, as well as costs incurred to date, in the amortization base. When certain criteria are met, the Company includes expansion airspace, which has not been permitted, in the calculation of the total remaining capacity of the landfill. - Landfill development costs - Final capping, closure and post-closure obligations a landfill facility ceases to accept waste and closes. Accruals for final capping, closure and post-closure monitoring and maintenance requirements in the U.S. consider site inspection, groundwater monitoring, leachate management, methane gas control and recovery, and operating and maintenance costs to be incurred during the period after the facility closes. Certain of these environmental costs, principally capping and methane gas control costs, are also incurred during the operating life of the site in accordance with the landfill operation requirements of Subtitle D and the air emissions standards. Daily maintenance activities, which include many of these costs, are expensed as incurred during the operating life of the landfill. Daily maintenance activities include leachate disposal; surface water, groundwater, and methane gas monitoring and maintenance; other pollution control activities; mowing and fertilizing the landfill final cap; fence and road maintenance; and third-party inspection and reporting costs. Site specific final capping, closure and post-closure engineering cost estimates are prepared annually for landfills owned or landfills operated under life-of-site agreements by the Company. The net present value of landfill final capping, closure and post-closure liabilities are calculated by estimating the total obligation in current dollars, inflating the obligation based upon the expected date of the expenditure and discounting the inflated total to its present value using a credit adjusted risk-free rate. Any changes in expectations that result in an upward revision to the estimated undiscounted cash flows are treated as a new liability and are inflated and discounted at rates reflecting market conditions. Any changes in expectations that result in a downward revision (or no revision) to the estimated undiscounted cash flows result in a liability that is inflated and discounted at rates reflecting the market conditions at the time the cash flows were originally estimated. This policy results in the Company’s final capping, closure and post-closure liabilities being recorded in “layers.” The Company’s discount rate assumption for purposes of computing layers for final capping, closure and post-closure liabilities is based on its long-term credit adjusted risk-free rate. The Company’s discount rate assumption for purposes of computing 2022 and 2021 “layers” for final capping, closure and post-closure obligations ranged from 3.25% to 5.50% for 2022 and was 3.25% for 2021. The Company’s long-term inflation rate assumption ranged from 2.25% to 2.75% for 2022 and was 2.25% for 2021. In accordance with the accounting guidance on asset retirement obligations, the final capping, closure and post-closure liability is recorded on the balance sheet along with an offsetting addition to site costs which is amortized to depletion expense on a units-of-consumption basis as remaining landfill airspace is consumed. The impact of changes determined to be changes in estimates, based on an annual update, is accounted for on a prospective basis. Depletion expense resulting from final capping, closure and post-closure obligations recorded as a component of landfill site costs will generally be less during the early portion of a landfill’s operating life and increase thereafter. Owned landfills and landfills operated under life-of-site agreements have estimated remaining lives, based on remaining permitted capacity, probable expansion capacity and projected annual disposal volumes, that range from approximately 1 to 329 years, with approximately 90% of the projected annual disposal volume from landfills with remaining lives of less than 70 years. The costs for final capping, closure and post-closure obligations at landfills the Company owns or operates under life-of-site agreements are generally estimated based on interpretations of current requirements and proposed or anticipated regulatory changes. The following is a reconciliation of the Company’s final capping, closure and post-closure liability balance from December 31, 2020 to December 31, 2022: ​ ​ ​ ​ ​ Final capping, closure and post-closure liability at December 31, 2020 $ 301,896 Liability adjustments ​ (1,081) Accretion expense associated with landfill obligations ​ 14,333 Closure payments ​ (21,040) Assumption of closure liabilities from acquisitions ​ 11,380 Disposition of closure liabilities from divested operations ​ ​ (3,566) Foreign currency translation adjustment ​ ​ 615 Final capping, closure and post-closure liability at December 31, 2021 ​ 302,537 Liability adjustments ​ 39,321 Accretion expense associated with landfill obligations ​ 16,068 Closure payments ​ (18,834) Assumption of closure liabilities from acquisitions ​ ​ 8,575 Disposition of closure liabilities from divested operations ​ ​ (916) Foreign currency translation adjustment ​ (2,145) Final capping, closure and post-closure liability at December 31, 2022 ​ $ 344,606 ​ Liability adjustments of $39,321 and $1,081 for the years ended December 31, 2022 and 2021, respectively, represent non-cash changes to final capping, closure and post-closure liabilities and are recorded on the Consolidated Balance Sheets along with an offsetting addition to site costs, which is amortized to depletion expense as the remaining landfill airspace is consumed. The final capping, closure and post-closure liability is included in Other long-term liabilities in the Consolidated Balance Sheets. The Company performs its annual review of its cost and capacity estimates in the first quarter of each year. - Disposal capacity 1) whether the land where the expansion is being sought is contiguous to the current disposal site, and the Company either owns the expansion property or has rights to it under an option, purchase, operating or other similar agreement; 2) whether total development costs, final capping costs, and closure/post-closure costs have been determined; 3) whether internal personnel have performed a financial analysis of the proposed expansion site and have determined that it has a positive financial and operational impact; 4) whether internal personnel or external consultants are actively working to obtain the necessary approvals to obtain the landfill expansion permit; and 5) whether the Company considers it probable that the Company will achieve the expansion (for a pursued expansion to be considered probable, there must be no significant known technical, legal, community, business, or political restrictions or similar issues existing that the Company believes are more likely than not to impair the success of the expansion). It is possible that the Company’s estimates or assumptions could ultimately be significantly different from actual results. In some cases, the Company may be unsuccessful in obtaining an expansion permit or the Company may determine that an expansion permit that the Company previously thought was probable has become unlikely. To the extent that such estimates, or the assumptions used to make those estimates, prove to be significantly different than actual results, or the belief that the Company will receive an expansion permit changes adversely in a significant manner, the costs of the landfill, including the costs incurred in the pursuit of the expansion, may be subject to impairment testing, as described below, and lower profitability may be experienced due to higher amortization rates, higher capping, closure and post-closure rates, and higher expenses or asset impairments related to the removal of previously included expansion airspace. The Company periodically evaluates its landfill sites for potential impairment indicators. The Company’s judgments regarding the existence of impairment indicators are based on regulatory factors, market conditions and operational performance of its landfills. Future events could cause the Company to conclude that impairment indicators exist and that its landfill carrying costs are impaired. Business Combination Accounting The Company accounts for business combinations as follows: ● ● Finite-Lived Intangible Assets The amounts assigned to franchise agreements, contracts, customer lists, permits and other agreements are being amortized over the expected term of the related agreements (ranging from 1 Goodwill and Indefinite-Lived Intangible Assets The Company acquired indefinite-lived intangible assets in connection with certain of its acquisitions. The amounts assigned to indefinite-lived intangible assets consist of the value of certain perpetual rights to provide solid waste collection and transportation services in specified territories. The Company measures and recognizes acquired indefinite-lived intangible assets at their estimated acquisition date fair values. Indefinite-lived intangible assets are not amortized. Goodwill represents the excess of: (a) the aggregate of the fair value of consideration transferred, the fair value of any noncontrolling interest in the acquiree (if any) and the acquisition date fair value of the Company’s previously held equity interest in the acquiree (if any), over (b) the fair value of assets acquired and liabilities assumed. Goodwill and intangible assets, deemed to have indefinite lives, are subject to annual impairment tests as described below. Goodwill and indefinite-lived intangible assets are tested for impairment on at least an annual basis in the fourth quarter of the year. In addition, the Company evaluates its reporting units for impairment if events or circumstances change between annual tests indicating a possible impairment. Examples of such events or circumstances include, but are not limited to, the following: ● ● ● ● ● As part of the Company’s goodwill impairment test, the Company estimates the fair value of each of its reporting units using discounted cash flow analyses. The Company’s reporting units consisted of its six geographic solid waste operating segments at December 31, 2022, 2021 and 2020. The Company compares the fair value of each reporting unit with the carrying value of the net assets assigned to each reporting unit. If the fair value of a reporting unit is greater than the carrying value of the net assets, including goodwill, assigned to the reporting unit, then no impairment results. If the fair value is less than its carrying value, an impairment charge is recorded for the amount by which the carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. In testing indefinite-lived intangible assets for impairment, the Company compares the estimated fair value of each indefinite-lived intangible asset to its carrying value. If the fair value of the indefinite-lived intangible asset is less than its carrying value, an impairment charge would be recorded to earnings in the Company’s Consolidated Statements of Net Income. During the Company’s annual impairment analysis of its solid waste operations, the Company determined the fair value of each of its six geographic operating segments at December 31, 2022, 2021 and 2020 and each indefinite-lived intangible asset within those segments using discounted cash flow analyses, which require significant assumptions and estimates about the future operations of each reporting unit and the future discrete cash flows related to each indefinite-lived intangible asset. Significant judgments inherent in these analyses include the determination of appropriate discount rates, the amount and timing of expected future cash flows, growth rates and income tax rates. The cash flows employed in the Company’s 2022 discounted cash flow analyses were based on ten-year financial forecasts, which in turn were based on the 2023 annual budget developed internally by management. These forecasts reflect operating profit margins that were consistent with 2022 results and perpetual revenue growth rates of 4.5%. The Company’s discount rate assumptions are based on an assessment of the market participant rate which approximated 7.9%. In assessing the reasonableness of the Company’s determined fair values of its reporting units, the Company evaluates its results against its current market capitalization. The Company did not record an impairment charge to any of its six geographic operating segments as a result of its annual goodwill impairment tests for the years ended December 31, 2022, 2021 or 2020. During the fourth quarter of 2021, the Company recorded an impairment charge of $2,277, which is included in Impairments and other operating items in the Consolidated Statements of Net Income, on certain indefinite-lived intangible assets at two of its E&P sites in its Southern segment. The Company did not record an impairment charge to any of its six geographic operating segments as a result of its indefinite-lived intangible assets impairment tests for the years ended December 31, 2022 or 2020. Impairments of Property and Equipment and Finite-Lived Intangible Assets Property, equipment and finite-lived intangible assets are carried on the Company’s consolidated financial statements based on their cost less accumulated depreciation or amortization. Finite-lived intangible assets consist of long-term franchise agreements, contracts, customer lists, permits and other agreements. The recoverability of these assets is tested whenever events or changes in circumstances indicate that their carrying amount may not be recoverable. Typical indicators that an asset may be impaired include, but are not limited to, the following: ● ● ● ● ● If any of these or other indicators occur, a test of recoverability is performed by comparing the carrying value of the asset or asset group to its undiscounted expected future cash flows. If the carrying value is in excess of the undiscounted expected future cash flows, impairment is measured by comparing the fair value of the asset to its carrying value. Fair value is determined by an internally developed discounted projected cash flow analysis of the asset. Cash flow projections are sometimes based on a group of assets, rather than a single asset. If cash flows cannot be separately and independently identified for a single asset, the Company will determine whether an impairment has occurred for the group of assets for which the projected cash flows can be identified. If the fair value of an asset is determined to be less than the carrying amount of the asset or asset group, an impairment in the amount of the difference is recorded in the period that the impairment indicator occurs. Several impairment indicators are beyond the Company’s control, and whether or not they will occur cannot be predicted with any certainty. Estimating future cash flows requires significant judgment and projections may vary from cash flows eventually realized. There are other considerations for impairments of landfills, as described below. During the year ended December 31, 2022, the Company did not record any significant impairment charges for finite-lived intangible assets or property and equipment. During the year ended December 31, 2021, the Company recorded a $16,379 impairment charge, which is included in Impairments and other operating items in the Consolidated Statements of Net Income, for property and equipment and finite-lived intangible assets at three of its E&P waste sites in its Southern segment. The demand for the Company’s E&P waste services depends on the continued demand for, and production of, oil and natural gas. Crude oil and natural gas prices historically have been volatile. Macroeconomic and geopolitical conditions, including a significant decline in oil prices occurring in 2020 driven by both surplus production and supply, as well as the decrease in demand caused by factors including the COVID-19 pandemic, resulted in decreased levels of oil and natural gas exploration and production activity and a corresponding decrease in demand for the Company’s E&P waste services in 2020. During the year ended December 31, 2020, total E&P waste revenue declined $112,114, compared to the prior year period, on rig count declines of 56% in certain basins. The most impacted basins include the Williston Basin in North Dakota, the Eagle Ford Basin in Texas and the Powder River Basin in Wyoming, all of which have relatively high costs associated with drilling, making them less attractive than other basins, including the Permian Basin in Texas and New Mexico. Additionally, across the industry there was uncertainty regarding future demand for oil and related services, as noted by several energy companies during 2020, many of whom are customers of the Company’s E&P waste services. These energy companies wrote down the values of their oil and gas assets in anticipation of the potential for the decarbonization of their energy product mix given an increased global focus on reducing greenhouse gases and addressing climate change. Such uncertainty regarding global demand had a significant impact on the investment and operating plans of the Company’s E&P waste customers in the basins where the Company operates. The decrease in E&P activity, together with market expectations of a likely slow recovery in oil prices, reduced the expected future period cash flows of the Company’s E&P waste services. Based on these events, the Company concluded that a triggering event occurred which required the Company to perform an impairment test of the property and equipment and intangible assets of its E&P waste services as of June 30, 2020 using July 2020 industry projections for drilling activity by basin as the basis for expectations about future activity. Based upon the results of the impairment test, the Company concluded that the carrying value exceeded the projected undiscounted cash flows of four E&P waste landfills. The next step was to calculate the fair value of these four landfills using an income approach employing a discounted cash flow (“DCF”) model over the lesser of 40 years or the remaining life of each landfill. Additional key assumptions used in the DCF model included a disc

Use of Estimates and Assumption

Use of Estimates and Assumptions	12 Months Ended
	Dec. 31, 2022
Use of Estimates and Assumptions [Abstract]
Use of Estimates and Assumptions	4. USE OF ESTIMATES AND ASSUMPTIONS In preparing the Company’s consolidated financial statements, several estimates and assumptions are made that affect the accounting for and recognition of assets, liabilities, revenues and expenses. These estimates and assumptions must be made because certain of the information that is used in the preparation of the Company’s consolidated financial statements is dependent on future events, cannot be calculated with a high degree of precision from data available or is simply not capable of being readily calculated based on generally accepted methodologies. In some cases, these estimates are particularly difficult to determine and the Company must exercise significant judgment. The most difficult, subjective and complex estimates and the assumptions that deal with the greatest amount of uncertainty are related to the Company’s accounting for landfills, self-insurance accruals, income taxes, allocation of acquisition purchase price, contingent consideration accruals and asset impairments, which are discussed in Note 3. An additional area that involves estimation is when the Company estimates the amount of potential exposure it may have with respect to litigation, claims and assessments in accordance with the accounting guidance on contingencies. Actual results for all estimates could differ materially from the estimates and assumptions that the Company uses in the preparation of its consolidated financial statements.

Prepaid Expenses and Other Curr

Prepaid Expenses and Other Current Assets	12 Months Ended
	Dec. 31, 2022
Prepaid Expenses and Other Current Assets [Abstract]
Prepaid Expenses and Other Current Assets	5. PREPAID EXPENSES AND OTHER CURRENT ASSETS Prepaid expenses and other current assets consist of the following: ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2022 2021 Income taxes receivable $ 43,055 $ 61,305 Inventory ​ ​ 55,188 ​ ​ 44,257 Prepaid insurance ​ ​ 31,588 ​ ​ 22,471 Unrealized cash flow hedge gains ​ ​ 17,906 ​ ​ — Prepaid licenses and permits ​ ​ 12,116 ​ ​ 10,683 Other ​ ​ 45,293 ​ ​ 37,006 ​ $ 205,146 $ 175,722 ​

Property and Equipment, Net

Property and Equipment, Net	12 Months Ended
	Dec. 31, 2022
Property and Equipment, Net [Abstract]
Property and Equipment, Net	6. PROPERTY AND EQUIPMENT, NET Property and equipment, net consists of the following: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2022 2021 Landfill site costs ​ $ 5,179,768 ​ $ 4,447,530 Rolling stock ​ 2,835,330 ​ 2,483,294 Land, buildings and improvements ​ 1,673,062 ​ 1,339,542 Containers ​ 1,180,370 ​ 983,602 Machinery and equipment ​ 1,065,767 ​ 940,723 Construction in progress ​ 132,367 ​ 82,187 ​ ​ 12,066,664 ​ 10,276,878 Less accumulated depreciation and depletion ​ (5,115,749) ​ (4,554,929) ​ ​ $ 6,950,915 ​ $ 5,721,949 ​ Machinery and equipment included $11,227 and $10,342, at December 31, 2022 and 2021, respectively, of equipment assets accounted for as finance leases. The Company’s landfill depletion expense, recorded in Depreciation in the Consolidated Statements of Net Income, for the years ended December 31, 2022, 2021 and 2020, was $232,251, $212,898 and $200,374, respectively.

Leases_2

Leases	12 Months Ended
	Dec. 31, 2022
Lessee Disclosure [Abstract]
Leases	7. LEASES The Company rents certain equipment and facilities under short-term agreements, non-cancelable operating lease agreements and finance leases. The Company determines if an arrangement is or contains a lease at contract inception. The Company recognizes a right-of-use (“ROU”) asset and a lease liability at the lease commencement date. The lease liability is initially measured at the present value of the unpaid lease payments at the lease commencement date. Key estimates and judgments include how the Company determines (1) the discount rate it uses to discount the unpaid lease payments to present value, (2) lease term and (3) lease payments. The lease guidance requires a lessee to discount its unpaid lease payments using the interest rate implicit in the lease or, if that rate cannot be readily determined, its incremental borrowing rate. Generally, the Company cannot determine the interest rate implicit in the lease because it does not have access to the lessor’s estimated residual value or the amount of the lessor’s deferred initial direct costs. Therefore, the Company generally uses its incremental borrowing rate as the discount rate for the lease. The Company’s incremental borrowing rate for a lease is the rate of interest it would have to pay on a collateralized basis to borrow an amount equal to the lease payments under similar terms. The lease term for the Company’s leases includes the noncancelable period of the lease, plus any additional periods covered by either a Company option to extend (or not to terminate) the lease that the Company is reasonably certain to exercise, or an option to extend (or not to terminate) the lease controlled by the lessor. Lease payments included in the measurement of the lease liability comprise fixed payments or variable lease payments. The variable lease payments take into account annual changes in the consumer price index and common area maintenance charges, if known. ROU assets for operating and finance leases are periodically reviewed for impairment losses. The Company uses the long-lived asset impairment guidance in ASC Subtopic 360-10, Property, Plant, and Equipment – Overall, to determine whether an ROU asset is impaired, and if so, the amount of the impairment loss to recognize. The Company did not recognize an impairment charge for any The Company monitors for events or changes in circumstances that require a reassessment of one of its leases. When a reassessment results in the remeasurement of a lease liability, a corresponding adjustment is made to the carrying amount of the corresponding ROU asset. The Company did not recognize any significant remeasurements during the years ended December 31, 2022, 2021 and 2020. The Company has elected not to recognize ROU assets and lease liabilities for short-term leases that have a lease term of less than 12 months. The Company has elected to apply the short-term lease recognition and measurement exemption allowed for in the lease accounting standard. The Company recognizes the lease payments associated with its short-term leases as an expense on a straight-line basis over the lease term. The Company initially entered into finance leases in December 2020 and the assets under these leases went into service on December 31, 2020. Lease cost for operating and finance leases for the years ended December 31, 2022, 2021 and 2020 were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ ​ 2022 ​ 2021 ​ 2020 Operating lease cost ​ $ 41,891 ​ $ 40,381 ​ $ 39,411 Finance lease cost: ​ ​ ​ ​ ​ ​ ​ ​ ​ Amortization of leased assets ​ ​ 2,484 ​ ​ 3,424 ​ ​ — Interest on leased liabilities ​ ​ 219 ​ ​ 152 ​ ​ — Total lease cost ​ $ 44,594 ​ $ 43,957 ​ $ 39,411 ​ Supplemental cash flow information and non-cash activity related to the Company’s leases are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ ​ 2022 ​ ​ 2021 ​ ​ 2020 Cash paid for amounts included in the measurement of lease liabilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ Operating cash flows from operating leases ​ $ 40,782 ​ $ 40,249 ​ $ 39,212 Operating cash flows from finance leases ​ $ 219 ​ $ 152 ​ $ — Financing cash flows from finance leases ​ $ 5,560 ​ $ 3,133 ​ $ — Non-cash activity: ​ ​ ​ ​ ​ ​ ​ ​ ​ Right-of-use assets obtained in exchange for lease liabilities - operating leases ​ $ 63,648 ​ $ 17,933 ​ $ 15,117 Right-of-use assets obtained in exchange for lease liabilities - finance leases ​ $ 3,369 ​ $ 10,012 ​ $ 3,754 ​ Weighted-average remaining lease term and discount rate for the Company’s leases are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ 2022 ​ 2021 ​ 2020 Weighted average remaining lease term - operating leases ​ 8.9 years 8.0 years 8.6 years Weighted average remaining lease term - finance leases ​ 4.2 years ​ 4.9 years ​ 5.4 years Weighted average discount rate - operating leases ​ 2.93 % 3.37 % 3.86 % Weighted average discount rate - finance leases ​ 1.96 % ​ 1.89 % ​ 1.89 % ​ As of December 31, 2022, future minimum lease payments, reconciled to the respective lease liabilities, are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Operating Leases ​ ​ Finance Leases 2023 $ 40,499 ​ $ 2,906 2024 ​ 32,521 ​ 2,905 2025 ​ 26,869 ​ 2,905 2026 ​ 22,317 ​ 2,320 2027 ​ 19,528 ​ 898 Thereafter ​ 89,050 ​ — Minimum lease payments ​ 230,784 ​ 11,934 Less: imputed interest ​ (30,152) ​ (470) Present value of minimum lease payments ​ ​ 200,632 ​ ​ 11,464 Less: current portion of lease liabilities ​ ​ (35,170) ​ ​ (2,695) Long-term portion of lease liabilities ​ $ 165,462 ​ $ 8,769 ​

Acquisitions_2

Acquisitions	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Acquisitions [Abstract]
Acquisitions	7. The Company acquired four individually immaterial non-hazardous solid waste collection, transfer, recycling and disposal businesses during the three months ended March 31, 2023. The total transaction-related expenses incurred during the three months ended March 31, 2023 for these acquisitions were $2,081. These expenses are included in Selling, general and administrative expenses in the Company’s Condensed Consolidated Statements of Net Income. The Company acquired four individually immaterial non-hazardous solid waste collection, transfer and recycling businesses during the three months ended March 31, 2022. The total transaction-related expenses incurred during the three months ended March 31, 2022 for these acquisitions were $4,540. These expenses are included in Selling, general and administrative expenses in the Company’s Condensed Consolidated Statements of Net Income. The results of operations of the acquired businesses have been included in the Company’s Condensed Consolidated Financial Statements from their respective acquisition dates. The Company expects these acquired businesses to contribute towards the achievement of the Company’s strategy to expand through acquisitions. Goodwill acquired is attributable to the synergies and ancillary growth opportunities expected to arise after the Company’s acquisition of these businesses. The following table summarizes the consideration transferred to acquire these businesses and the preliminary amounts of identifiable assets acquired and liabilities assumed at the acquisition dates for the acquisitions consummated in the three months ended March 31, 2023 and 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ 2023 2022 ​ ​ Acquisitions ​ Acquisitions Fair value of consideration transferred: ​ ​ Cash ​ $ 144,611 ​ $ 355,212 Debt assumed ​ 17,097 ​ — ​ ​ 161,708 ​ 355,212 ​ ​ ​ ​ ​ ​ ​ Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired: ​ ​ ​ ​ Accounts receivable ​ 3,882 ​ 9,211 Prepaid expenses and other current assets ​ 2,290 ​ 2,059 Restricted investments ​ ​ 5,462 ​ ​ — Operating lease right-of-use assets ​ ​ 587 ​ ​ 1,715 Property and equipment ​ 67,201 ​ 89,565 Long-term franchise agreements and contracts ​ 58,630 ​ 4,994 Customer lists ​ 1,527 ​ 38,944 Permits and other intangibles ​ ​ 2,403 ​ ​ 34,245 Accounts payable and accrued liabilities ​ (4,159) ​ (20,382) Current portion of operating lease liabilities ​ ​ (53) ​ ​ (830) Deferred revenue ​ (761) ​ (3,077) Contingent consideration ​ (6,000) ​ (5,000) Long-term portion of operating lease liabilities ​ ​ (534) ​ ​ (885) Other long-term liabilities ​ (4,543) ​ (631) Deferred income taxes ​ (1,077) ​ (9,317) Total identifiable net assets ​ 124,855 ​ 140,611 Goodwill ​ $ 36,853 ​ $ 214,601 ​ Goodwill acquired during the three months ended March 31, 2023 and 2022, totaling $36,853 and $80,455, respectively, is expected to be deductible for tax purposes. The fair value of acquired working capital related to 10 individually immaterial acquisitions completed during the twelve months ended March 31, 2023, is provisional pending receipt of information from the acquirees to support the fair value of the assets acquired and liabilities assumed. Any adjustments recorded relating to finalizing the working capital for these 10 acquisitions are not expected to be material to the Company’s financial position. The gross amount of trade receivables due under contracts acquired during the three months ended March 31, 2023, was $4,164, of which $282 was expected to be uncollectible. The gross amount of trade receivables due under contracts acquired during the three months ended March 31, 2022, was $11,412, of which $2,201 was expected to be uncollectible. The Company did not acquire any other class of receivable as a result of the acquisition of these businesses.	8. ACQUISITIONS The Company recognizes, separately from goodwill, the identifiable assets acquired and liabilities assumed at their estimated acquisition date fair values. The Company measures and recognizes goodwill as of the acquisition date as the excess of: (a) the aggregate of the fair value of consideration transferred, the fair value of the noncontrolling interest in the acquiree (if any) and the acquisition date fair value of the Company’s previously held equity interest in the acquiree (if any), over (b) the fair value of assets acquired and liabilities assumed. If information about facts and circumstances existing as of the acquisition date is incomplete by the end of the reporting period in which a business combination occurs, the Company will report provisional amounts for the items for which the accounting is incomplete. The measurement period ends once the Company receives the information it was seeking; however, this period will not exceed one year from the acquisition date. Any material adjustments recognized during the measurement period will be reflected prospectively in the period the adjustment is identified in the consolidated financial statements. The Company recognizes acquisition-related transaction costs as expense. The Company acquired 24 individually immaterial non-hazardous solid waste collection, transfer, recycling and disposal businesses during the year ended December 31, 2022. The total transaction-related expenses incurred during the year ended December 31, 2022 for these acquisitions was $24,933. These expenses are included in Selling, general and administrative expenses in the Company’s Consolidated Statements of Net Income. The Company acquired 30 individually immaterial non-hazardous solid waste collection, transfer, recycling and disposal businesses during the year ended December 31, 2021. The purchase consideration recorded during this period for nine of the acquired businesses included contingent consideration based upon the receipt of contract assignments and the achievement of certain targets, including future asset and revenue growth. The fair value of the total contingent consideration recorded during the year ended December 31, 2021 of $31,616 was determined using probability assessments of the expected future cash flows over a one The Company acquired 21 individually immaterial non-hazardous solid waste collection, transfer, recycling and disposal businesses during the year ended December 31, 2020. The total transaction-related expenses incurred during the year ended December 31, 2020 for these acquisitions was $9,803. These expenses are included in Selling, general and administrative expenses in the Company’s Consolidated Statements of Net Income. The results of operations of the acquired businesses have been included in the Company’s consolidated financial statements from their respective acquisition dates. The Company expects these acquired businesses to contribute towards the achievement of the Company’s strategy to expand through acquisitions. Goodwill acquired is attributable to the synergies and ancillary growth opportunities expected to arise after the Company’s acquisition of these businesses. The following table summarizes the consideration transferred to acquire these businesses and the amounts of identifiable assets acquired and liabilities assumed at the acquisition dates for the acquisitions consummated in the years ended December 31, 2022, 2021 and 2020: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2022 2021 2020 ​ ​ Acquisitions ​ Acquisitions ​ Acquisitions Fair value of consideration transferred: ​ ​ ​ Cash ​ $ 2,206,901 ​ $ 960,449 ​ $ 388,789 Debt assumed ​ 127,136 ​ 108,345 ​ 91,349 Change in open working capital settlements at year end ​ ​ — ​ ​ — ​ ​ 1,505 ​ ​ 2,334,037 ​ 1,068,794 ​ 481,643 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired: ​ ​ ​ ​ ​ Accounts receivable ​ 49,696 ​ 33,236 ​ 13,759 Prepaid expenses and other current assets ​ 9,428 ​ 4,866 ​ 4,509 Restricted investments ​ ​ 7,469 ​ ​ — ​ ​ — Operating lease right-of-use assets ​ ​ 4,707 ​ ​ 5,972 ​ ​ 5,247 Property and equipment ​ 1,073,155 ​ 394,687 ​ 173,394 Long-term franchise agreements and contracts ​ 239,866 ​ 134,827 ​ 59,149 Indefinite-lived intangibles ​ — ​ 9,557 ​ 13,465 Customer lists ​ 74,940 ​ 75,612 ​ 48,512 Permits and other intangibles ​ ​ 187,107 ​ ​ 116,967 ​ ​ 10,507 Other assets ​ 243 ​ 77 ​ 389 Accounts payable and accrued liabilities ​ (56,633) ​ (37,827) ​ (14,174) Current portion of operating lease liabilities ​ ​ (1,546) ​ ​ (1,370) ​ ​ (509) Deferred revenue ​ (10,761) ​ (8,389) ​ (1,821) Contingent consideration ​ (6,642) ​ (31,616) ​ (4,688) Long-term portion of operating lease liabilities ​ ​ (3,161) ​ ​ (4,602) ​ ​ (4,738) Other long-term liabilities ​ (6,915) ​ (13,976) ​ (2,136) Deferred income taxes ​ (51,507) ​ (63,822) ​ (4,525) Total identifiable net assets ​ 1,509,446 ​ 614,199 ​ 296,340 Goodwill ​ $ 824,591 ​ $ 454,595 ​ $ 185,303 ​ Goodwill acquired in 2022 totaling $510,755 is expected to be deductible for tax purposes. Goodwill acquired in 2021 totaling $187,287 is expected to be deductible for tax purposes. Goodwill acquired in 2020 totaling $169,147 is expected to be deductible for tax purposes. The fair value of acquired working capital related to 17 individually immaterial acquisitions completed during the year ended December 31, 2022, is provisional pending receipt of information from the acquirees to support the fair value of the assets acquired and liabilities assumed. Any adjustments recorded relating to finalizing the working capital for these 17 acquisitions are not expected to be material to the Company’s financial position. The gross amount of trade receivables due under contracts acquired during the year ended December 31, 2022, was $54,332, of which $4,636 was expected to be uncollectible. The gross amount of trade receivables due under contracts acquired during the year ended December 31, 2021, was $36,645, of which $3,409 was expected to be uncollectible. The gross amount of trade receivables due under contracts acquired during the year ended December 31, 2020, was $13,854, of which $95 was expected to be uncollectible. The Company did not acquire any other class of receivable as a result of the acquisition of these businesses.

Intangible Assets, Net_2

Intangible Assets, Net	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Intangible Assets, Net [Abstract]
Intangible Assets, Net	8. Intangible assets, exclusive of goodwill, consisted of the following at March 31, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross ​ ​ Accumulated Net ​ ​ Carrying ​ Accumulated ​ Impairment ​ Carrying ​ ​ Amount ​ Amortization ​ Loss ​ Amount Finite-lived intangible assets: ​ ​ ​ ​ Long-term franchise agreements and contracts ​ $ 975,058 ​ $ (312,988) ​ $ — ​ $ 662,070 Customer lists ​ 778,352 ​ (545,232) ​ — ​ 233,120 Permits and other ​ 782,166 ​ (120,992) ​ (40,784) ​ 620,390 ​ ​ 2,535,576 ​ (979,212) ​ (40,784) ​ 1,515,580 Indefinite-lived intangible assets: ​ ​ ​ ​ Solid waste collection and transportation permits ​ 181,613 ​ — ​ — ​ 181,613 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Intangible assets, exclusive of goodwill ​ $ 2,717,189 ​ $ (979,212) ​ $ (40,784) ​ $ 1,697,193 ​ The weighted-average amortization period of long-term franchise agreements and contracts acquired during the three months ended March 31, 2023 was 25.0 years. The weighted-average amortization period of customer lists acquired during the three months ended March 31, 2023 was 11.5 years. The weighted-average amortization period of finite-lived permits and other acquired during the three months ended March 31, 2023 was 40.0 years. Intangible assets, exclusive of goodwill, consisted of the following at December 31, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross ​ ​ Accumulated Net ​ ​ Carrying ​ Accumulated ​ Impairment ​ Carrying ​ ​ Amount ​ Amortization ​ Loss ​ Amount Finite-lived intangible assets: ​ ​ ​ ​ Long-term franchise agreements and contracts ​ $ 916,582 ​ $ (297,382) ​ $ — ​ $ 619,200 Customer lists ​ 776,719 ​ (527,425) ​ — ​ 249,294 Permits and other ​ 779,689 ​ (115,095) ​ (40,784) ​ 623,810 ​ ​ 2,472,990 ​ (939,902) ​ (40,784) ​ 1,492,304 Indefinite-lived intangible assets: ​ ​ ​ ​ Solid waste collection and transportation permits ​ 181,613 ​ — ​ — ​ 181,613 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Intangible assets, exclusive of goodwill ​ $ 2,654,603 ​ $ (939,902) ​ $ (40,784) ​ $ 1,673,917 ​ Estimated future amortization expense for the next five years relating to finite-lived intangible assets owned as of March 31, 2023 is as follows: ​ ​ ​ ​ ​ For the year ending December 31, 2023 $ 156,320 For the year ending December 31, 2024 ​ $ 141,755 For the year ending December 31, 2025 ​ $ 124,919 For the year ending December 31, 2026 ​ $ 109,325 For the year ending December 31, 2027 ​ $ 95,730 ​	9. INTANGIBLE ASSETS, NET Intangible assets, exclusive of goodwill, consisted of the following at December 31, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross ​ ​ Accumulated Net ​ ​ Carrying ​ Accumulated ​ Impairment ​ Carrying ​ ​ Amount ​ Amortization ​ Loss ​ Amount Finite-lived intangible assets: ​ ​ ​ ​ Long-term franchise agreements and contracts ​ $ 916,582 ​ $ (297,382) ​ $ — ​ $ 619,200 Customer lists ​ 776,719 ​ (527,425) ​ — ​ 249,294 Permits and other ​ 779,689 ​ (115,095) ​ (40,784) ​ 623,810 ​ ​ 2,472,990 ​ (939,902) ​ (40,784) ​ 1,492,304 Indefinite-lived intangible assets: ​ ​ ​ ​ Solid waste collection and transportation permits ​ 181,613 ​ — ​ — ​ 181,613 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Intangible assets, exclusive of goodwill ​ $ 2,654,603 ​ $ (939,902) ​ $ (40,784) ​ $ 1,673,917 ​ The weighted-average amortization period of long-term franchise agreements and contracts acquired during the year ended December 31, 2022 was 28.9 years. The weighted-average amortization period of customer lists acquired during the year ended December 31, 2022 was 11.5 years. The weighted-average amortization period of finite-lived permits and other acquired during the year ended December 31, 2022 was 40.0 years. ​ Intangible assets, exclusive of goodwill, consisted of the following at December 31, 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross ​ ​ Accumulated Net ​ ​ Carrying ​ Accumulated ​ Impairment ​ Carrying ​ ​ Amount ​ Amortization ​ Loss ​ Amount Finite-lived intangible assets: ​ ​ ​ ​ Long-term franchise agreements and contracts ​ $ 724,128 ​ $ (278,827) ​ $ — ​ $ 445,301 Customer lists ​ 711,047 ​ (450,109) ​ — ​ 260,938 Permits and other ​ 598,336 ​ (94,807) ​ (40,784) ​ 462,745 ​ ​ 2,033,511 ​ (823,743) ​ (40,784) ​ 1,168,984 Indefinite-lived intangible assets: ​ ​ ​ ​ Solid waste collection and transportation permits ​ 181,613 ​ — ​ — ​ 181,613 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Intangible assets, exclusive of goodwill ​ $ 2,215,124 ​ $ (823,743) ​ $ (40,784) ​ $ 1,350,597 ​ Estimated future amortization expense for the next five years relating to finite-lived intangible assets is as follows: ​ ​ ​ ​ ​ For the year ending December 31, 2023 $ 153,457 For the year ending December 31, 2024 ​ $ 135,884 For the year ending December 31, 2025 ​ $ 119,071 For the year ending December 31, 2026 ​ $ 103,541 For the year ending December 31, 2027 ​ $ 89,959 ​

Accrued Liabilities

Accrued Liabilities	12 Months Ended
	Dec. 31, 2022
Accrued Liabilities [Abstract]
Accrued Liabilities	10. ACCRUED LIABILITIES Accrued liabilities consist of the following: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2022 2021 Insurance claims and premiums ​ $ 152,242 ​ $ 149,864 Payroll and payroll-related ​ 126,301 ​ 141,877 Interest payable ​ 47,612 ​ 28,729 Final capping, closure and post-closure liability ​ ​ 17,336 ​ ​ 19,925 Property taxes ​ ​ 11,218 ​ ​ 8,833 Environmental remediation reserves ​ 3,165 ​ 2,300 Cell processing reserves ​ 2,939 ​ 3,364 Share-based compensation plan liability ​ 2,344 ​ 2,423 Transaction-related expenses ​ ​ 1,627 ​ ​ 3,130 Unrealized cash flow hedge losses ​ — ​ 18,675 Other ​ 66,463 ​ 63,476 ​ ​ $ 431,247 ​ $ 442,596 ​

Long-Term Debt_2

Long-Term Debt	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Long-Term Debt [Abstract]
Long-Term Debt	9. The following table presents the Company’s long-term debt at March 31, 2023 and December 31, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, ​ December 31, ​ ​ 2023 2022 Revolver under Credit Agreement, bearing interest ranging from 5.77% to 5.92% (a) ​ $ 650,587 ​ $ 614,705 ​ Term loan under Credit Agreement, bearing interest at 5.77% (a) ​ 650,000 ​ 650,000 ​ Term loan under Term Loan Agreement, bearing interest at 5.78% (a) ​ ​ 800,000 ​ ​ 800,000 ​ 4.25% Senior Notes due 2028 ​ ​ 500,000 ​ ​ 500,000 ​ 3.50% Senior Notes due 2029 ​ ​ 500,000 ​ ​ 500,000 ​ 2.60% Senior Notes due 2030 ​ ​ 600,000 ​ ​ 600,000 ​ 2.20% Senior Notes due 2032 ​ ​ 650,000 ​ ​ 650,000 ​ 3.20% Senior Notes due 2032 ​ ​ 500,000 ​ ​ 500,000 ​ 4.20% Senior Notes due 2033 ​ ​ 750,000 ​ ​ 750,000 ​ 3.05% Senior Notes due 2050 ​ ​ 500,000 ​ ​ 500,000 ​ 2.95% Senior Notes due 2052 ​ ​ 850,000 ​ ​ 850,000 ​ Notes payable to sellers and other third parties, bearing interest ranging from 2.42% to 10.35%, principal and interest payments due periodically with due dates ranging from 2024 to 2036 (a) ​ 36,049 ​ 37,232 ​ Finance leases, bearing interest ranging from 1.89% to 2.16%, with lease expiration dates ranging from 2026 to 2027 (a) ​ ​ 10,791 ​ ​ 11,464 ​ ​ ​ 6,997,427 ​ 6,963,401 ​ Less – current portion ​ (10,513) ​ (6,759) ​ Less – unamortized debt discount and issuance costs ​ (65,075) ​ (66,493) ​ Long-term portion of debt and notes payable ​ $ 6,921,839 ​ $ 6,890,149 ​ ____________________ (a) Interest rates represent the interest rates at March 31, 2023. ​ Credit Agreement Details of the Credit Agreement are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, ​ December 31, ​ ​ 2023 2022 Revolver under Credit Agreement ​ ​ ​ Available ​ $ 1,159,902 ​ $ 1,193,502 ​ ​ Letters of credit outstanding ​ $ 39,511 ​ $ 41,793 ​ ​ Total amount drawn, as follows: ​ $ 650,587 ​ $ 614,705 ​ ​ Amount drawn – U.S. Term SOFR rate loan ​ $ 280,000 ​ $ 391,000 ​ ​ Interest rate applicable – U.S. Term SOFR rate loan ​ ​ 5.77 % ​ 5.42 % ​ Amount drawn – U.S. Term SOFR rate loan ​ $ 100,000 ​ $ — ​ ​ Interest rate applicable – U.S. Term SOFR rate loan ​ ​ 5.78 % ​ — % ​ Amount drawn – U.S. Term SOFR rate loan ​ $ 60,000 ​ $ — ​ ​ Interest rate applicable – U.S. Term SOFR rate loan ​ ​ 5.91 % ​ — % ​ Amount drawn – Canadian bankers’ acceptance ​ $ 210,587 ​ $ 223,705 ​ ​ Interest rate applicable – Canadian bankers’ acceptance ​ 5.92 % 5.74 % ​ Commitment – rate applicable ​ 0.09 % 0.09 % ​ Term loan under Credit Agreement ​ ​ ​ ​ ​ ​ Amount drawn – U.S. Term SOFR rate loan ​ $ 650,000 ​ $ 650,000 ​ ​ Interest rate applicable – U.S. Term SOFR rate loan ​ ​ 5.77 % ​ 5.42 % ​ ​ ​ In addition to the $39,511 of letters of credit at March 31, 2023 issued and outstanding under the Credit Agreement, the Company has issued and outstanding letters of credit totaling $85,120 under facilities other than the Credit Agreement.	11. LONG-TERM DEBT The following table presents the Company’s long-term debt as of December 31, 2022 and 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ December 31, ​ ​ 2022 2021 Revolver under Credit Agreement, bearing interest ranging from 5.42% to 5.74% (a) ​ $ 614,705 ​ $ 803,944 ​ Term loan under Credit Agreement, bearing interest at 5.42% (a) ​ 650,000 ​ 650,000 ​ Term loan under Term Loan Agreement, bearing interest at 5.42% (a), (b) ​ ​ 800,000 ​ ​ — ​ 4.25% Senior Notes due 2028 ​ ​ 500,000 ​ ​ 500,000 ​ 3.50% Senior Notes due 2029 ​ ​ 500,000 ​ ​ 500,000 ​ 2.60% Senior Notes due 2030 ​ ​ 600,000 ​ ​ 600,000 ​ 2.20% Senior Notes due 2032 ​ ​ 650,000 ​ ​ 650,000 ​ 3.20% Senior Notes due 2032 ​ ​ 500,000 ​ ​ — ​ 4.20% Senior Notes due 2033 ​ ​ 750,000 ​ ​ — ​ 3.05% Senior Notes due 2050 ​ ​ 500,000 ​ ​ 500,000 ​ 2.95% Senior Notes due 2052 ​ ​ 850,000 ​ ​ 850,000 ​ Notes payable to sellers and other third parties, bearing interest ranging from 2.42% to 10.35%, principal and interest payments due periodically with due dates ranging from 2024 to 2036 (a) ​ 37,232 ​ 37,508 ​ Finance leases, bearing interest ranging from 1.89% to 2.16%, with lease expiration dates ranging from 2026 to 2027 (a) ​ ​ 11,464 ​ ​ 10,519 ​ ​ ​ 6,963,401 ​ 5,101,971 ​ Less – current portion ​ (6,759) ​ (6,020) ​ Less – unamortized debt discount and issuance costs ​ (66,493) ​ (55,451) ​ ​ ​ $ 6,890,149 ​ $ 5,040,500 ​ (a) Interest rates represent the interest rates incurred at December 31, 2022. (b) Interest rate margin for term loan under Term Loan Agreement was 1.00% at December 31, 2022. Credit Agreement The Company has a revolving credit and term loan agreement (as amended, restated, amended and restated, supplemented or otherwise modified from time to time, the “Credit Agreement”) with Bank of America, N.A., acting through its Canada Branch, as the global agent, the swing line lender and a letter of credit issuer, Bank of America, N.A., as the U.S. agent and a letter of credit issuer, the other lenders named therein (the “Lenders”) and any other financial institutions from time to time party thereto. The Credit Agreement has a scheduled maturity date of July 30, 2026, which may be extended further upon agreement by Lenders holding at least 50% of the commitments and credit extensions outstanding, with respect to their respective commitments and credit extensions outstanding. Any Lender that does not agree to an extension of the maturity date shall not be so extended with respect to their commitments and credit extensions. Details of the Credit Agreement are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2022 2021 Revolver under Credit Agreement ​ ​ ​ Available ​ $ 1,193,502 ​ $ 933,775 ​ Letters of credit outstanding ​ $ 41,793 ​ $ 112,281 ​ Total amount drawn, as follows: ​ $ 614,705 ​ $ 803,944 ​ Amount drawn – U.S. Term SOFR rate loan ​ $ 391,000 ​ ​ Not applicable ​ Interest rate applicable – U.S. Term SOFR rate loan ​ ​ 5.42 % ​ Not applicable ​ Interest rate margin – U.S. Term SOFR rate loan ​ ​ 1.00 % ​ Not applicable ​ Amount drawn – U.S. LIBOR rate loan ​ ​ Not applicable ​ $ 631,000 ​ Interest rate applicable – U.S. LIBOR rate loan ​ ​ Not applicable ​ ​ 1.10 % Interest rate margin – U.S. LIBOR rate loan ​ ​ Not applicable ​ ​ 1.00 % Amount drawn – U.S. base rate loan ​ $ — ​ $ 158,000 ​ Interest rate applicable – U.S. base rate loan ​ ​ — % ​ 3.25 % Interest rate margin – U.S. base rate loan ​ ​ — % ​ 0.00 % Amount drawn – U.S. swingline loan ​ $ — ​ $ 11,000 ​ Interest rate applicable – U.S. swingline loan ​ ​ — % ​ 3.25 % Interest rate margin – U.S. swingline loan ​ ​ — % ​ 0.00 % Amount drawn – Canadian bankers’ acceptance ​ $ 223,705 ​ $ 3,944 ​ Interest rate applicable – Canadian bankers’ acceptance ​ 5.74 % 1.45 % Interest rate acceptance fee – Canadian bankers’ acceptance ​ 1.00 % 1.00 % Commitment – rate applicable ​ 0.09 % 0.09 % Term loan under Credit Agreement ​ ​ ​ ​ ​ Amount drawn – U.S. Term SOFR rate loan ​ $ 650,000 ​ ​ Not applicable ​ Interest rate applicable – U.S. Term SOFR rate loan ​ ​ 5.42 % ​ Not applicable ​ Interest rate margin – U.S. Term SOFR rate loan ​ ​ 1.00 % ​ Not applicable ​ Amount drawn – U.S. based LIBOR loan ​ ​ Not applicable ​ $ 650,000 ​ Interest rate applicable – U.S. based LIBOR loan ​ ​ Not applicable ​ 1.10 % Interest rate margin – U.S. based LIBOR loan ​ ​ Not applicable ​ 1.20 % ​ In addition to the $41,793 of letters of credit at December 31, 2022 issued and outstanding under the Credit Agreement, the Company has issued and outstanding letters of credit totaling $85,319 under facilities other than the Credit Agreement. Pursuant to the terms and conditions of the Credit Agreement, the Lenders provide a $2,500,000 credit facility to the Company, consisting of (i) revolving advances up to an aggregate principal amount of $1,850,000 at any one time outstanding, and (ii) a term loan in an aggregate principal amount of $650,000. As part of the aggregate commitments under the revolving advances, the Credit Agreement provides for letters of credit to be issued at the request of the Company in an aggregate amount not to exceed $320,000 and for swing line loans to be issued at the request of the Company in an aggregate amount not to exceed the lesser of $100,000 and the aggregate commitments under the revolving advances. Both the letter of credit sublimit and the swing line sublimit are part of, and not in addition to, the aggregate commitments under the revolving advances. Subject to certain specified conditions and additional deliveries, the Company has the option to request increases in the aggregate commitments for revolving advances and one or more additional term loans, provided that (i) the aggregate principal amount of such requests does not exceed $500,000 and (ii) the aggregate principal amount of commitments and term loans under the credit facility does not exceed $3,000,000. As of December 31, 2022, there are no commitments by lenders for any such increases in aggregate principal amount of revolving advances or additional term loans described in the preceding sentence. The Company has $2,901 of debt issuance costs related to the revolver under the Credit Agreement recorded in Other assets, net in the Consolidated Balance Sheets at December 31, 2022, which are being amortized through the maturity date, or July 30, 2026. The Company is amortizing $8,674 of debt issuance costs related to the term loan under the Credit Agreement through the maturity date. Advances are available under the Credit Agreement in U.S. dollars and Canadian dollars. Prior to the effectiveness of the amendment to the Credit Agreement dated as of October 31, 2022 (the “First Amendment”), interest accrued on the term loan under the Credit Agreement at a rate based on London interbank rate for specified interest periods (“LIBOR”) or a base rate, at the Company’s option, plus an applicable margin. Following the effectiveness of the First Amendment, interest accrues on the term loan under the Credit Agreement at a rate based upon the secured overnight financing rate (“SOFR”) for specified interest periods (“Term SOFR”) (including for all Term SOFR loans, a credit spread adjustment of 0.10% for all applicable interest periods) or a base rate, at the Company’s option, plus an applicable margin. Interest accrues on revolving advances under the Credit Agreement, at the Company’s option, (i) (A) prior to the effectiveness of the First Amendment, at LIBOR, (B) following the effectiveness of the First Amendment, at Term SOFR or (C) a base rate for U.S. dollar borrowings, in each case plus an applicable margin, and (ii) at the Canadian prime rate for Canadian dollar borrowings, plus an applicable margin. Canadian dollar borrowings are also available by way of bankers’ acceptances or BA equivalent notes, subject to the payment of a drawing fee. Certain fees for letters of credit in US dollars and Canadian dollars are also based on the applicable margin. The applicable margin used in connection with interest rates and fees is based on the debt rating of the Company’s public non-credit-enhanced, senior unsecured long-term debt (the “Debt Rating”). The applicable margin for LIBOR loans (prior to the effectiveness of the First Amendment), Term SOFR loans (following the effectiveness of the First Amendment), drawing fees for bankers’ acceptances, BA equivalent notes and certain letter of credit fees ranges from 0.750% to 1.250%. The applicable margin for U.S. base rate loans, Canadian prime rate loans and swing line loans ranges from 0.00% to 0.250%. The Company will also pay a fee based on the Debt Rating on the actual daily unused amount of the aggregate revolving commitments, ranging from 0.065% to 0.150%.‎ The Credit Agreement contains customary benchmark replacement mechanics in connection with certain benchmark transition events, as well as customary mechanics with respect to the unavailability of a tenor of a then-current benchmark rate. The borrowings under the Credit Agreement are unsecured and there are no subsidiary guarantors under the Credit Agreement. Proceeds from borrowings under the Credit Agreement may be used (i) to finance acquisitions, dividends or other equity distributions permitted under the Credit Agreement and (ii) for capital expenditures, working capital, payment of certain transaction fees and expenses, letters of credit and any other lawful corporate purposes. The Credit Agreement contains customary representations, warranties, covenants and events of default, including, among others, a change of control event of default and limitations on the incurrence of indebtedness and liens, new lines of business, mergers, transactions with affiliates and burdensome agreements. During the continuance of an event of default, the Lenders may take a number of actions, including, among others, declaring the entire amount then outstanding under the Credit Agreement to be due and payable. The Credit Agreement includes a financial covenant limiting, as of the last day of each fiscal quarter, the ratio of (a) Consolidated Total Funded Debt (as defined in the Credit Agreement) as of such date to (b) Consolidated EBITDA (as defined in the Credit Agreement), measured for the preceding 12 months, to not more than 3.75 to 1.00 (or 4.25 to 1.00 during material acquisition periods, subject to certain limitations). As of December 31, 2022 and 2021, the Company was in compliance with all applicable covenants in the Credit Agreement as in effect as of the applicable date. Term Loan Agreement On October 31, 2022, the Company, as borrower, Bank of America, N.A., as administrative agent, and the other lenders from time to time party thereto (the “New TL Lenders”) entered into that certain Term Loan Agreement (as amended, restated, supplemented or otherwise modified from time to time, the “Term Loan Agreement”), pursuant to which the New TL Lenders made loans to the Company in an aggregate stated principal amount of $800,000. The Company used substantially all of the proceeds of borrowings under the Term Loan Agreement to repay revolving borrowings under the Credit Agreement. Amounts borrowed under the Term Loan Agreement and repaid or prepaid may not be reborrowed. The Company is amortizing $1,725 of debt issuance costs through the maturity date, or July 30, 2026. Interest accrues on the term loan under the Term Loan Agreement at Term SOFR (including for all Term SOFR loans, a credit spread adjustment of 0.10% for all applicable interest periods) or a base rate, at the Company’s option, plus an applicable margin. The applicable margin used in connection with calculating interest rates and fees is based on the Company’s Debt Rating. The applicable margin for Term SOFR loans ranges from 0.750% to 1.250% per annum, and the applicable margin for base rate loans ranges from 0.00% to 0.250% per annum. The Term Loan Agreement contains customary benchmark replacement mechanics in connection with certain benchmark transition events, as well as customary mechanics with respect to the unavailability of a tenor of a then-current benchmark rate. The borrowings under the Term Loan Agreement are unsecured and there are no subsidiary guarantors under the Term Loan Agreement. The Term Loan Agreement contains customary representations, warranties, covenants and events of default, including, among others, a change of control event of default and limitations on the incurrence of indebtedness and liens, new lines of business, mergers, transactions with affiliates and burdensome agreements. During the continuance of an event of default, the New TL Lenders may take a number of actions, including, among others, declaring the entire amount then outstanding under the Term Loan Agreement and related loan documents to be due and payable. The Term Loan Agreement includes a financial covenant limiting, as of the last day of each fiscal quarter, the ratio of (i) Consolidated Total Funded Debt (as defined in the Term Loan Agreement) as of such date to (b) Consolidated EBITDA (as defined in the Term Loan Agreement), measured for the preceding 12 months, to not more than 3.75 to 1.00 (or 4.25 to 1.00 during material acquisition periods, subject to certain limitations). As of December 31, 2022, the Company was in compliance with all applicable covenants in the Term Loan Agreement. Private Placement Notes Pursuant to the terms and conditions of a Master Note Purchase Agreement dated as of June 1, 2016 (as amended, restated, amended and restated, supplemented or otherwise modified from time to time, the “2016 NPA”) between the Company and certain accredited institutional investors, the Company issued senior unsecured notes (the “2016 Private Placement Notes”) consisting of (i) $150,000 of senior notes due June 1, 2021 (the “June 2021 Private Placement Notes”), (ii) $200,000 of senior notes due June 1, 2023, (iii) $150,000 of senior notes due April 20, 2024, (iv) $400,000 of senior notes due June 1, 2026 and (v) $250,000 of senior notes due April 20, 2027. Pursuant to the terms and conditions of a Master Note Purchase Agreement, dated as of July 15, 2008 (as amended, restated, amended and restated, assumed, supplemented or otherwise modified from time to time, the “2008 NPA”) between the Company and certain accredited institutional investors, the Company issued senior unsecured notes (the “2008 Private Placement Notes” and together with the 2016 Private Placement Notes, the “Private Placement Notes”) consisting of (i) $100,000 of senior notes due April 1, 2021 (the “April 2021 Private Placement Notes” and together with the June 2021 Private Placement Notes, the “2021 Private Placement Notes”), (ii) $125,000 of senior notes due August 20, 2022 and (iii) $375,000 of senior notes due August 20, 2025. The Company repaid at maturity the 2021 Private Placement Notes and repaid the other Private Placement Notes in connection with the Offering (defined below) in September 2021. Senior Notes On November 16, 2018, the Company completed an underwritten public offering of $500,000 aggregate principal amount of its 4.25% Senior Notes due December 1, 2028 (the “2028 Senior Notes”). The 2028 Senior Notes were issued under the Indenture, dated as of November 16, 2018 (as amended, restated, amended and restated, supplemented or otherwise modified from time to time, the “Indenture”), by and between the Company and U.S. Bank National Association, as trustee (the “Trustee”), as supplemented through the First Supplemental Indenture, dated as of November 16, 2018. The Company is amortizing $5,792 of debt issuance costs through the maturity date of the 2028 Senior Notes. The Company may redeem some or all of the 2028 Senior Notes at its option prior to September 1, 2028 (three months before the maturity date) at any time and from time to time at a redemption price equal to the greater of 100% of the principal amount of the 2028 Senior Notes redeemed, or the sum of the present values of the remaining scheduled payments of principal and interest on the 2028 Senior Notes redeemed, plus accrued and unpaid interest to, but excluding, the redemption date. Commencing on September 1, 2028 (three months before the maturity date), the Company may redeem some or all of the 2028 Senior Notes, at any time and from time to time, at a redemption price equal to the principal amount of the 2028 Senior Notes being redeemed plus accrued and unpaid interest to, but excluding, the redemption date. On April 16, 2019, the Company completed an underwritten public offering of $500,000 aggregate principal amount of its 3.50% Senior Notes due May 1, 2029 (the “2029 Senior Notes”). The 2029 Senior Notes were issued under the Indenture, as supplemented through the Second Supplemental Indenture, dated as of April 16, 2019. The Company is amortizing $5,954 of debt issuance costs through the maturity date of the 2029 Senior Notes. The Company may redeem some or all of the 2029 Senior Notes at its option prior to February 1, 2029 (three months before the maturity date) at any time and from time to time at a redemption price equal to the greater of 100% of the principal amount of the 2029 Senior Notes redeemed, or the sum of the present values of the remaining scheduled payments of principal and interest on the 2029 Senior Notes redeemed, plus accrued and unpaid interest to, but excluding, the redemption date. Commencing on February 1, 2029 (three months before the maturity date), the Company may redeem some or all of the 2029 Senior Notes, at any time and from time to time, at a redemption price equal to the principal amount of the 2029 Senior Notes being redeemed plus accrued and unpaid interest to, but excluding, the redemption date. On January 23, 2020, the Company completed an underwritten public offering of $600,000 aggregate principal amount of 2.60% Senior Notes due February 1, 2030 (the “2030 Senior Notes”). The 2030 Senior Notes were issued under the Indenture, as supplemented through the Third Supplemental Indenture, dated as of January 23, 2020. The Company is amortizing $5,435 of debt issuance costs through the maturity date of the 2030 Senior Notes. The Company may redeem some or all of the 2030 Senior Notes at its option prior to November 1, 2029 (three months before the maturity date) at any time and from time to time at a redemption price equal to the greater of 100% of the principal amount of the 2030 Senior Notes redeemed, or the sum of the present values of the remaining scheduled payments of principal and interest on the 2030 Senior Notes redeemed, plus accrued and unpaid interest to, but excluding, the redemption date. Commencing on November 1, 2029 (three months before the maturity date), the Company may redeem some or all of the 2030 Senior Notes, at any time and from time to time, at a redemption price equal to the principal amount of the 2030 Senior Notes being redeemed plus accrued and unpaid interest to, but excluding, the redemption date. On March 13, 2020, the Company completed an underwritten public offering of $500,000 aggregate principal amount of 3.05% Senior Notes due April 1, 2050 (the “2050 Senior Notes”). The 2050 Senior Notes were issued under the Indenture, as supplemented through the Fourth Supplemental Indenture, dated as of March 13, 2020. The Company is amortizing a $7,375 debt discount and $5,682 of debt issuance costs through the maturity date of the 2050 Senior Notes. The Company may redeem some or all of the 2050 Senior Notes at its option prior to October 1, 2049 (six months before the maturity date) at any time and from time to time at a redemption price equal to the greater of 100% of the principal amount of the 2050 Senior Notes redeemed, or the sum of the present values of the remaining scheduled payments of principal and interest on the 2050 Senior Notes redeemed, plus accrued and unpaid interest to, but excluding, the redemption date. Commencing on October 1, 2049 (six months before the maturity date), the Company may redeem some or all of the 2050 Senior Notes, at any time and from time to time, at a redemption price equal to the principal amount of the 2050 Senior Notes being redeemed plus accrued and unpaid interest to, but excluding, the redemption date. On September 20, 2021, the Company completed an underwritten public offering (the “Offering”) of $650,000 aggregate principal amount of 2.20% Senior Notes due January 15, 2032 (the “2032 Senior Notes”) and $850,000 aggregate principal amount of 2.95% Senior Notes due January 15, 2052 (the “2052 Senior Notes”). The 2032 Senior Notes and the 2052 Senior Notes were issued under the Indenture, as supplemented through the Fifth Supplemental Indenture, dated as of September 20, 2021. The Company is amortizing a $1,066 debt discount and $5,979 of debt issuance costs through the maturity date of the 2032 Senior Notes and a $12,742 debt discount and $9,732 of debt issuance costs through the maturity date of the 2052 Senior Notes. The Company may, prior to October 15, 2031 (three months before the maturity date), redeem some or all of the 2032 Senior Notes, at any time and from time to time, at a redemption price equal to the greater of 100% of the principal amount of the 2032 Senior Notes redeemed, or the sum of the present values of the remaining scheduled payments of principal and interest on the 2032 Senior Notes redeemed. Commencing on October 15, 2031 (three months before the maturity date), the Company may redeem some or all of the 2032 Senior Notes, at any time and from time to time, at a redemption price equal to the principal amount of the 2032 Senior Notes being redeemed plus accrued and unpaid interest to, but excluding, the redemption date. The Company may, prior to July 15, 2051 (six months before the maturity date), redeem some or all of the 2052 Senior Notes, at any time and from time to time, at a redemption price equal to the greater of 100% of the principal amount of the 2052 Senior Notes redeemed, or the sum of the present values of the remaining scheduled payments of principal and interest on the 2052 Senior Notes redeemed. Commencing on July 15, 2051 (six months before the maturity date), the Company may redeem some or all of the 2052 Senior Notes, at any time and from time to time, at a redemption price equal to the principal amount of the 2052 Senior Notes being redeemed plus accrued and unpaid interest to, but excluding, the redemption date. In connection with the Offering, the Company exercised its right to repay the $1,500,000 of Private Placement Notes then outstanding governed by the 2008 NPA and the 2016 NPA. The Company repaid the Private Placement Notes then outstanding, including the $110,617 make-whole premium, with the net proceeds from the Offering and borrowings under the revolving credit facility provided under its Credit Agreement. The Company recorded $115,288 to Loss on early extinguishment of debt during the year ended December 31, 2021 due to the repayment of the Private Placement Notes and associated make-whole premium and related fees. On March 9, 2022, the Company completed an underwritten public offering of $500,000 aggregate principal amount of its 3.20% Senior Notes due June 1, 2032 (the “New 2032 Senior Notes”). The New 2032 Senior Notes were issued under the Indenture, as supplemented through the Sixth Supplemental Indenture, dated as of March 9, 2022. The Company is amortizing $375 of debt discount and $4,668 of debt issuance costs through the maturity date of the New 2032 Senior Notes. The Company may redeem some or all of the New 2032 Senior Notes at its option prior to March 1, 2032 (three months before the maturity date) (the “New 2032 Senior Notes Par Call Date”), at any time and from time to time at a redemption price equal to the greater of 100% of the principal amount of the New 2032 Senior Notes redeemed, or the sum of the present values of the remaining scheduled payments of principal and interest on the New 2032 Senior Notes redeemed discounted to the redemption date (assuming the New 2032 Senior Notes matured on the New 2032 Senior Notes Par Call Date), plus, in either case, accrued and unpaid interest thereon to the redemption date. Commencing on March 1, 2032 (three months before the maturity date), the Company may redeem some or all of the New 2032 Senior Notes, at any time and from time to time, at a redemption price equal to the principal amount of the New 2032 Senior Notes being redeemed plus accrued and unpaid interest thereon to the redemption date. On August 18, 2022, the Company completed an underwritten public offering of $750,000 aggregate principal amount of its 4.20% Senior Notes due January 15, 2033 (the “2033 Senior Notes” and, together with the 2028 Senior Notes, the 2029 Senior Notes, the 2030 Senior Notes, the 2032 Senior Notes, the New 2032 Senior Notes, the 2050 Senior Notes and the 2052 Senior Notes, the “Senior Notes”). The 2033 Senior Notes were issued under the Indenture, as supplemented through the Seventh Supplemental Indenture, dated as of August 18, 2022. The Company is amortizing $2,040 of debt discount and $6,878 of debt issuance costs through the maturity date of the 2033 Senior Notes. The Company may redeem some or all of the 2033 Senior Notes at its option prior to October 15, 2032 (three months before the maturity date) (the “2033 Senior Notes Par Call Date”), at any time and from time to time at a redemption price equal to the greater of 100% of the principal amount of the 2033 Senior Notes redeemed, or the sum of the present values of the remaining scheduled payments of principal and interest on the 2033 Senior Notes redeemed discounted to the redemption date (assuming the 2033 Senior Notes matured on the 2033 Senior Notes Par Call Date), plus, in either case, accrued and unpaid interest thereon to the redemption date. Commencing on October 15, 2032 (three months before the maturity date), the Company may redeem some or all of the 2033 Senior Notes, at any time and from time to time, at a redemption price equal to the principal amount of the 2033 Senior Notes being redeemed plus accrued and unpaid interest thereon to the redemption date. The Company pays interest on the Senior Notes semi-annually in arrears. The Senior Notes are the Company’s senior unsecured obligations, ranking equally in right of payment with its existing and future unsubordinated debt and senior to any of its future subordinated debt. The Senior Notes are not guaranteed by any of the Company’s subsidiaries. Under certain circumstances, the Company may become obligated to pay additional amounts (the “Additional Amounts”) with respect to the Senior Notes to ensure that the net amounts received by each holder of the Senior Notes will not be less than the amount such holder would have received if withholding taxes or deductions were not incurred on a payment under or with respect to the Senior Notes. If such payment of Additional Amounts is a result of a change in the laws or regulations, including a change in any official position, the introduction of an official position or a holding by a court of competent jurisdiction, of any jurisdiction from or through which payment is made by or on behalf of the Senior Notes having power to tax, and the Company cannot avoid such payments of Additional Amounts through reasonable measures, then the Company may redeem the applicable series of the Senior Notes then outstanding at a redemption price equal to 100% of the principal amount thereof, plus accrued and unpaid interest, if any, to, but excluding, the redemption date (subject to the right of holders of record on the relevant record date to receive interest due on an interest payment date that is on or prior to the redemption date). If the Company experiences certain kinds of changes of control, each holder of the Senior Notes may require the Company to repurchase all or a portion of the Senior Notes for cash at a price equal to 101% of the aggregate principal amount of such Senior Notes, plus any accrued but unpaid interest, if any, to, but excluding, the date of repurchase. The covenants in the Indenture include limitations on liens, sale-leaseback transactions and mergers and sales of all or substantially all of the Company’s assets. The Indenture also includes customary events of default with respect to the Senior Notes. As of December 31, 2022 and 2021, the Company was in compliance with all applicable covenants in the Indenture as in effect on the applicable date. Upon an event of default, the principal of and accrued and unpaid interest on all the Senior Notes may be declared to be due and payable by the Trustee or the holders of not less than 25% in principal amount of the outstanding Senior Notes of the applicable series. Upon such a declaration, such principal and accrued interest on all of the applicable series of the Senior Notes will be due and payable immediately. In the case of an event of default resulting from certain events of bankruptcy, insolvency or reorganization, the principal (or such specified amount) of and accrued and unpaid interest, if any, on all outstanding series of the Senior Notes will become and be immediately due and payable without any declaration or other act on the part of the Trustee or any holder of the applicable series of the Senior Notes. Under certain As of December 31, 2022, aggregate contractual future principal payments by calendar year on long-term debt are due as follows: ​ ​ ​ ​ ​ 2023 $ 6,759 2024 ​ 10,636 2025 ​ 7,112 2026 ​ 2,071,152 2027 ​ 5,179 Thereafter ​ 4,862,563 ​ ​ $ 6,963,401 ​

Fair Value of Financial Instr_4

Fair Value of Financial Instruments	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Fair Value [Abstract]
Fair Value of Financial Instruments	14. The Company uses a three-tier fair value hierarchy to classify and disclose all assets and liabilities measured at fair value on a recurring basis in periods subsequent to their initial measurement. These tiers include: Level 1, defined as quoted market prices in active markets for identical assets or liabilities; Level 2, defined as inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, model-based valuation techniques for which all significant assumptions are observable in the market, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities; and Level 3, defined as unobservable inputs that are not corroborated by market data. The Company’s financial assets and liabilities recorded at fair value on a recurring basis include derivative instruments and restricted cash and investments. At March 31, 2023 and December 31, 2022, the Company’s derivative instruments included pay-fixed, receive-variable interest rate swaps. The Company’s interest rate swaps are recorded at their estimated fair values based on quotes received from financial institutions that trade these contracts. The Company verifies the reasonableness of these quotes using similar quotes from another financial institution as of each date for which financial statements are prepared. For the Company’s interest rate swaps, the Company also considers the Company’s creditworthiness in its determination of the fair value measurement of these instruments in a net liability position and the counterparties’ creditworthiness in its determination of the fair value measurement of these instruments in a net asset position. The Company’s restricted cash is valued at quoted market prices in active markets for identical assets, which the Company receives from the financial institutions that hold such investments on its behalf. The Company’s restricted cash measured at fair value is invested primarily in money market accounts, bank time deposits and U.S. government and agency securities. The Company’s restricted investments are valued at quoted market prices in active markets for similar assets, which the Company receives from the financial institutions that hold such investments on its behalf. The Company’s restricted investments measured at fair value are invested primarily in money market accounts, bank time deposits, U.S. government and agency securities and Canadian bankers’ acceptance notes. The Company’s assets and liabilities measured at fair value on a recurring basis at March 31, 2023 and December 31, 2022, were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurement at March 31, 2023 Using ​ ​ ​ Quoted Prices in Significant ​ ​ ​ ​ ​ ​ ​ Active Markets ​ Other ​ Significant ​ ​ ​ ​ ​ for Identical ​ Observable ​ Unobservable ​ ​ ​ ​ ​ Assets ​ Inputs ​ Inputs ​ ​ Total ​ (Level 1) ​ (Level 2) ​ (Level 3) Interest rate swap derivative instruments – net asset position ​ $ 24,427 ​ $ — ​ $ 24,427 ​ $ — Restricted cash ​ $ 106,625 ​ $ 106,625 ​ $ — ​ $ — Restricted investments ​ $ 72,784 ​ $ — ​ $ 72,784 ​ $ — Contingent consideration ​ $ (85,822) ​ $ — ​ $ — ​ $ (85,822) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurement at December 31, 2022 Using ​ ​ ​ Quoted Prices in Significant ​ ​ ​ ​ ​ ​ ​ Active Markets ​ Other ​ Significant ​ ​ ​ ​ ​ for Identical ​ Observable ​ Unobservable ​ ​ ​ ​ ​ Assets ​ Inputs ​ Inputs ​ ​ Total ​ (Level 1) ​ (Level 2) ​ (Level 3) Interest rate swap derivative instruments – net asset position ​ $ 31,807 ​ $ — ​ $ 31,807 ​ $ — Restricted cash ​ $ 102,727 ​ $ 102,727 ​ $ — ​ $ — Restricted investments ​ $ 66,402 ​ $ — ​ $ 66,402 ​ $ — Contingent consideration ​ $ (81,415) ​ $ — ​ $ — ​ $ (81,415) ​ The following table summarizes the changes in the fair value for Level 3 liabilities related to contingent consideration for the three months ended March 31, 2023 and 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 31, ​ ​ 2023 2022 Beginning balance ​ $ 81,415 ​ $ 94,308 ​ Contingent consideration recorded at acquisition date ​ 6,000 ​ 5,000 ​ Payment of contingent consideration recorded at acquisition date ​ (1,319) ​ (3,571) ​ Adjustments to contingent consideration ​ ​ (637) ​ (52) ​ Interest accretion expense ​ 363 ​ 353 ​ Ending balance ​ $ 85,822 ​ $ 96,038 ​ ​	12. FAIR VALUE OF FINANCIAL INSTRUMENTS The Company uses a three-tier fair value hierarchy to classify and disclose all assets and liabilities measured at fair value on a recurring basis in periods subsequent to their initial measurement. These tiers include: Level 1, defined as quoted market prices in active markets for identical assets or liabilities; Level 2, defined as inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, model-based valuation techniques for which all significant assumptions are observable in the market, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities; and Level 3, defined as unobservable inputs that are not corroborated by market data. The Company’s financial assets and liabilities recorded at fair value on a recurring basis include derivative instruments and restricted cash and investments. At December 31, 2022 and 2021, the Company’s derivative instruments included pay-fixed, receive-variable interest rate swaps. The Company’s interest rate swaps are recorded at their estimated fair values based on quotes received from financial institutions that trade these contracts. The Company verifies the reasonableness of these quotes using similar quotes from another financial institution as of each date for which financial statements are prepared. For the Company’s interest rate swaps, the Company also considers the Company’s creditworthiness in its determination of the fair value measurement of these instruments in a net liability position and the counterparties’ creditworthiness in its determination of the fair value measurement of these instruments in a net asset position. The Company’s restricted cash is valued at quoted market prices in active markets for identical assets, which the Company receives from the financial institutions that hold such investments on its behalf. The Company’s restricted cash measured at fair value is invested primarily in money market accounts, bank time deposits and U.S. government and agency securities. The Company’s restricted investments are valued at quoted market prices in active markets for similar assets, which the Company receives from the financial institutions that hold such investments on its behalf. The Company’s restricted investments measured at fair value are invested primarily in money market accounts, bank time deposits, U.S. government and agency securities and Canadian bankers’ acceptance notes. The Company’s assets and liabilities measured at fair value on a recurring basis at December 31, 2022 and 2021, were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurement at December 31, 2022 Using ​ ​ ​ Quoted Prices in Significant ​ ​ ​ ​ ​ ​ ​ Active Markets ​ Other ​ Significant ​ ​ ​ ​ ​ for Identical ​ Observable ​ Unobservable ​ ​ ​ ​ ​ Assets ​ Inputs ​ Inputs ​ ​ Total ​ (Level 1) ​ (Level 2) ​ (Level 3) Interest rate swap derivative instruments – net asset position ​ $ 31,807 ​ $ — ​ $ 31,807 ​ $ — Restricted cash ​ $ 102,727 ​ $ 102,727 ​ $ — ​ $ — Restricted investments ​ $ 66,402 ​ $ — ​ $ 66,402 ​ $ — Contingent consideration ​ $ (81,415) ​ $ — ​ $ — ​ $ (81,415) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurement at December 31, 2021 Using ​ ​ ​ Quoted Prices in Significant ​ ​ ​ ​ ​ ​ ​ Active Markets ​ Other ​ Significant ​ ​ ​ ​ ​ for Identical ​ Observable ​ Unobservable ​ ​ ​ ​ ​ Assets ​ Inputs ​ Inputs ​ ​ Total ​ (Level 1) ​ (Level 2) ​ (Level 3) Interest rate swap derivative instruments – net liability position ​ $ (51,081) ​ $ — ​ $ (51,081) ​ $ — Restricted cash ​ $ 72,174 ​ $ 72,174 ​ $ — ​ $ — Restricted investments ​ $ 58,797 ​ $ — ​ $ 58,797 ​ $ — Contingent consideration ​ $ (94,308) ​ $ — ​ $ — ​ $ (94,308) ​ See Note 3 – “Impairments of Property and Equipment and Finite-Lived Intangible Assets” regarding non-recurring fair value measurements. ​ The following table summarizes the changes in the fair value for Level 3 liabilities related to contingent consideration for the years ended December 31, 2022 and 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ 2022 2021 Beginning balance ​ $ 94,308 ​ $ 71,736 Contingent consideration recorded at acquisition date ​ 6,642 ​ 31,616 Payment of contingent consideration recorded at acquisition date ​ (16,911) ​ (12,934) Payment of contingent consideration recorded in earnings ​ (2,982) ​ (520) Adjustments to contingent consideration ​ ​ (1,030) ​ ​ 2,954 Interest accretion expense ​ 1,417 ​ 1,470 Foreign currency translation adjustment ​ (29) ​ (14) Ending balance ​ $ 81,415 ​ $ 94,308 ​
Fair Value of Financial Instruments (10-Q)	12. The Company’s financial instruments consist primarily of cash and equivalents, trade receivables, restricted cash and investments, trade payables, debt instruments, contingent consideration obligations and interest rate swaps. As of March 31, 2023 and December 31, 2022, the carrying values of cash and equivalents, trade receivables, restricted cash and investments, trade payables and contingent consideration are considered to be representative of their respective fair values. The carrying values of the Company’s debt instruments, excluding certain notes as listed in the table below, approximate their fair values as of March 31, 2023 and December 31, 2022, based on current borrowing rates, current remaining average life to maturity and borrower credit quality for similar types of borrowing arrangements, and are classified as Level 2 within the fair value hierarchy. The carrying values and fair values of the Company’s debt instruments where the carrying values do not approximate their fair values as of March 31, 2023 and December 31, 2022, are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Carrying Value at ​ Fair Value (a) at ​ ​ March 31, ​ December 31, ​ March 31, ​ December 31, ​ 2023 2022 2023 2022 4.25% Senior Notes due 2028 ​ $ 500,000 ​ $ 500,000 ​ $ 491,500 ​ $ 470,850 3.50% Senior Notes due 2029 ​ $ 500,000 ​ $ 500,000 ​ $ 466,350 ​ $ 457,650 2.60% Senior Notes due 2030 ​ $ 600,000 ​ $ 600,000 ​ $ 525,060 ​ $ 510,540 2.20% Senior Notes due 2032 ​ $ 650,000 ​ $ 650,000 ​ $ 529,490 ​ $ 514,540 3.20% Senior Notes due 2032 ​ $ 500,000 ​ $ 500,000 ​ $ 444,800 ​ $ 429,000 4.20% Senior Notes due 2033 ​ $ 750,000 ​ $ 750,000 ​ $ 718,275 ​ $ 699,450 3.05% Senior Notes due 2050 ​ $ 500,000 ​ $ 500,000 ​ $ 341,300 ​ $ 343,300 2.95% Senior Notes due 2052 ​ $ 850,000 ​ $ 850,000 ​ $ 570,435 ​ $ 561,425 ____________________ *Senior Notes are classified as Level 2 within the fair value hierarchy. Fair value inputs include third-party calculations of the market interest rate of notes with similar ratings in similar industries over the remaining note terms. For details on the fair value of the Company’s interest rate swaps, restricted cash and investments and contingent consideration, refer to Note 14.

Commitments and Contingencies_4

Commitments and Contingencies	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Commitments and Contingencies [Abstract]
Commitments and Contingencies	17. In the normal course of its business and as a result of the extensive governmental regulation of the solid waste and E&P waste industries, the Company is subject to various judicial and administrative proceedings involving Canadian regulatory authorities as well as U.S. federal, state and local agencies. In these proceedings, an agency may subpoena the Company for records, or seek to impose fines on the Company or revoke or deny renewal of an authorization held by the Company, including an operating permit. From time to time, the Company may also be subject to actions brought by special interest or other groups, adjacent landowners or residents in connection with the permitting and licensing of landfills, transfer stations, and E&P waste treatment, recovery and disposal operations, or alleging environmental damage or violations of the permits and licenses pursuant to which the Company operates. The Company uses $1,000 as a threshold for disclosing environmental matters involving potential monetary sanctions. In addition, the Company is a party to various claims and suits pending for alleged damages to persons and property, alleged violations of certain laws and alleged liabilities arising out of matters occurring during the normal operation of the Company’s business. Except as noted in the matters described below, as of March 31, 2023, there is no current proceeding or litigation involving the Company or its property that the Company believes could have a material adverse effect on its business, financial condition, results of operations or cash flows. Jefferson Parish, Louisiana Landfill Litigation Between June 2016 and December 31, 2020, one of the Company’s subsidiaries, Louisiana Regional Landfill Company (“LRLC”), conducted certain operations at a municipal solid waste landfill known as the Jefferson Parish Landfill (the “JP Landfill”), located in Avondale, Louisiana, near the City of New Orleans. LRLC’s operations were governed by an Operating Agreement, entered into in May 2012 by LRLC under its previous name, IESI LA Landfill Corporation, and the owner of the JP Landfill, Jefferson Parish (the “Parish”). The Parish also holds the State of Louisiana permit for the operation of the JP Landfill. Aptim Corporation operated the landfill gas collection system at the JP Landfill under a separate contract with the Parish. In July and August 2018, four separate lawsuits seeking class action status were filed against LRLC and certain other Company subsidiaries, the Parish, and Aptim Corporation in Louisiana state court, and subsequently removed to the United States District Court for the Eastern District of Louisiana, before Judge Susie Morgan in New Orleans. The Court later consolidated the claims of the putative class action plaintiffs. Beginning in December 2018, a series of 11 substantively identical mass actions were filed in Louisiana state court against LRLC and certain other Company subsidiaries, the Parish, and Aptim Corporation. The claims of the mass action plaintiffs were consolidated in federal court in the Eastern District of Louisiana, also before Judge Susie Morgan (the “Addison” action). The putative class actions and the Addison action assert claims for damages from odors allegedly emanating from the JP Landfill. The consolidated putative class action complaint alleges that the JP Landfill released “noxious odors” into the plaintiffs’ properties and the surrounding community and asserts a range of liability theories—nuisance, negligence (since dismissed), and strict liability—against all defendants. The putative class is described as all residents of Jefferson Parish who have sustained legally cognizable damages as a result of odors from the JP Landfill, but the complaint proposes to revise the geographic definition based on further evidence. The putative class plaintiffs seek unspecified damages for nuisance and unidentified property value diminution. The Addison plaintiffs assert claims for nuisance, negligence, and (with respect to the Parish) unconstitutional takings under the Louisiana Constitution; on behalf of two plaintiffs, the Addison complaint also asserts claims for wrongful death and survivorship. The Court held an eight-day trial on general causation during January and February 2022. General causation was to address the questions of whether the JP Landfill could cause odors and emissions that are able to reach plaintiffs’ properties and whether those odors and emissions could result in the types of medical impacts and nuisance conditions complained of by the putative class and mass action plaintiffs. Among other things, defendants urged the court to find general causation tied to the geographic limits of landfill emissions that may have the potential to cause a nuisance based on air modeling done by defendants’ experts. On November 29, 2022, the Court issued a 45-page decision on the general causation trial. The Court concluded that all putative class and mass action plaintiffs established general causation—specifically that emissions and gases from the JP Landfill were capable of causing certain damages alleged by the plaintiffs. The Court held that it only needed to determine the level of exposure necessary to result in injuries and that the level existed somewhere offsite, and that it was not required to delineate this level of exposure within a geographic area. The Court did, however, limit the time period for damages, to between July 2017 and December 2019, and the types of alleged injuries for which the plaintiffs are able to seek damages, to headaches, nausea, vomiting, loss of appetite, sleep disruption, dizziness, fatigue, anxiety and worry, a decrease in quality of life, and loss of enjoyment or use of property. The Addison The Court has held several case management conferences since the general causation decision to discuss how to proceed with the class and mass action cases, and the Court has proposed trying certain Addison On April 17, 2023, the Company and the other Defendants filed a petition for a writ of mandamus from the Fifth Circuit Court of Appeals challenging the April 17 case management order’s sequencing of a merits trial before class certification. The Defendants also filed a motion to stay proceedings in the district court until the Fifth Circuit issues a decision on the writ petition. The Fifth Circuit has requested responses from the Plaintiffs and invited a response from the district court, which were due April 26, 2023. The Company has already obtained dismissal of approximately one third of the original Addison plaintiffs, the number of which now totals 544, and believes it has strong defenses to the merits of the Addison action, including specific causation issues due to other odor sources in the area. The Company also believes it has strong defenses to certification of the putative class actions, although the Court has not yet indicated when it will allow certification to be briefed and decided, and sequencing of that process may be affected by the Fifth Circuit’s decision on the writ petition. The Company is continuing to vigorously defend itself in these lawsuits; however, at this time, the Company is not able to determine the likelihood of any outcome regarding the underlying claims, including the allocation of any potential liability among the Company, the Parish, and Aptim Corporation. Los Angeles County, California Landfill Expansion Litigation A. Chiquita Canyon, LLC Lawsuit Against Los Angeles County In October 2004, the Company’s subsidiary, Chiquita Canyon, LLC (“CCL”), then under prior ownership, filed an application (the “Application”) with the County of Los Angeles (the “County”) Department of Regional Planning (“DRP”) for a conditional use permit (the “CUP”) to authorize the continued operation and expansion of the Chiquita Canyon Landfill (the “CC Landfill”). The CC Landfill has operated since 1972, and as a regional landfill, accepted approximately 2.6 million tons of materials for disposal and beneficial use in 2022. The Application requested expansion of the existing waste footprint on CCL’s contiguous property, an increase in maximum elevation, creation of a new entrance and new support facilities, construction of a facility for the County or another third-party operator to host household hazardous waste collection events, designation of an area for mixed organics/composting, and other modifications. After many years of reviews and delays, upon the recommendation of County staff, the County’s Regional Planning Commission (the “Commission”) approved the Application on April 19, 2017, but imposed operating conditions, fees and exactions that substantially reduced the historical landfill operations and represented a large increase in aggregate taxes and fees. CCL objected to many of the requirements imposed by the Commission. Current estimates for new costs imposed on CCL under the CUP are in excess of $300,000. CCL appealed the Commission’s decision to the County Board of Supervisors, but the appeal was not successful. At a subsequent hearing, on July 25, 2017, the Board of Supervisors approved the CUP. On October 20, 2017, CCL filed in the Superior Court of California, County of Los Angeles a verified petition for writ of mandate and complaint against the County and the County Board of Supervisors captioned Chiquita Canyon, LLC v. County of Los Angeles, No. BS171262 (Los Angeles Co. Super Ct.) (the “Complaint”). The Complaint challenges the terms of the CUP in 13 counts generally alleging that the County violated multiple California and federal statutes and California and federal constitutional protections. CCL seeks the following relief: (a) an injunction and writ of mandate against certain of the CUP’s operational restrictions, taxes and fees, (b) a declaration that the challenged conditions are unconstitutional and in violation of state and federal statutes, (c) reimbursement for any such illegal fees paid under protest, (d) damages, (e) an award of just compensation for a taking, (f) attorney fees, and (g) all other appropriate legal and equitable relief. Following extensive litigation in 2018 and 2019 on the permissible scope of CCL’s challenge, the Superior Court issued its decision on July 2, 2020, granting CCL’s petition for writ of mandate in part and denying it in part. CCL prevailed with respect to 12 of the challenged conditions, many of which imposed new fees and exactions on the CC Landfill. On October 11, 2022, CCL and the County entered into a settlement agreement that requires CCL to file a CUP modification application with the County embodying the terms of the settlement agreement. CCL filed the CUP modification application on November 10, 2022. If the CUP modification application is approved by the County and certain other contingencies are satisfied, CCL will dismiss this lawsuit. However, at this time, the Company is not able to determine the likelihood of any outcome in this matter. B. December 11, 2017 Notice of Violation Regarding Certain CUP Conditions. The County, through its DRP, issued a Notice of Violation, dated December 11, 2017 (the “NOV”), alleging that CCL violated certain conditions of the CUP, including Condition 79(B)(6) of the CUP by failing to pay an $11,600 Bridge & Thoroughfare Fee (“B&T Fee”) that was purportedly due on July 25, 2017. The alleged B&T fee was ostensibly to fund the construction of transportation infrastructure in the area of the Landfill. At the time the NOV was issued, CCL had already contested the legality of the B&T fee in the October 20, 2017 Complaint filed against the County in Los Angeles County Superior Court, described above under paragraph A (the “CUP lawsuit”). On January 12, 2018, CCL filed an appeal of the alleged violations in the NOV. Subsequently, CCL filed additional legal arguments and exhibits contesting the NOV. On March 6, 2018, a DRP employee designated as hearing officer sustained the NOV, including the $11,600 B&T fee, and imposed an administrative penalty in the amount of $83 and a noncompliance fee of $0.75. A written decision memorializing the hearing officer’s findings and order was issued on July 10, 2018. On April 13, 2018, CCL filed in the Superior Court of California, County of Los Angeles a Petition for Writ of Administrative Mandamus against the County seeking to overturn the decision sustaining the NOV, contending that the NOV and decision are not supported by the facts or law. On July 17, 2018, the Court granted CCL leave to pay the $11,600 B&T fee and to amend its Complaint in the CUP lawsuit to reflect the payment under protest, allowing the challenge to the B&T fee under the Mitigation Fee Act to proceed in the CUP lawsuit. CCL paid the B&T fee under protest on August 10, 2018, and also paid on that date the administrative penalty of $83 and the noncompliance fee of $0.75. The Court indicated that the NOV case would be coordinated with the CUP lawsuit. On October 11, 2022, CCL and the County entered into the settlement agreement, described above under paragraph A. If the CUP modification application is approved by the County and certain other contingencies are satisfied, CCL will dismiss this lawsuit. However, at this time, the Company is not able to determine the likelihood of any outcome in this matter.	13. COMMITMENTS AND CONTINGENCIES COMMITMENTS Financial Surety Bonds The Company uses financial surety bonds for a variety of corporate guarantees. The two largest uses of financial surety bonds are for municipal contract performance guarantees and asset closure and retirement requirements under certain environmental regulations. Environmental regulations require demonstrated financial assurance to meet final capping, closure and post-closure requirements for landfills. In addition to surety bonds, these requirements may also be met through alternative financial assurance instruments, including insurance, letters of credit and restricted cash and investment deposits. At December 31, 2022 and 2021, the Company had provided customers and various regulatory authorities with surety bonds in the aggregate amounts of approximately $811,243 and $744,037, respectively, to secure its asset closure and retirement requirements and $636,224 and $556,570, respectively, to secure performance under collection contracts and landfill operating agreements. The Company owns a 9.9% interest in a company that, among other activities, issues financial surety bonds to secure landfill final capping, closure and post-closure obligations for companies operating in the solid waste industry. The Company accounts for this investment under the cost method of accounting. There have been no identified events or changes in circumstances that may have a significant adverse effect on the carrying value of the investment. This investee company and the parent company of the investee have written financial surety bonds for the Company, of which $424,379 and $410,378 were outstanding as of December 31, 2022 and 2021, respectively. The Company’s reimbursement obligations under these bonds are secured by a pledge of its stock in the investee company. Unconditional Purchase Obligations At December 31, 2022, the Company’s unconditional purchase obligations consist of multiple fixed-price fuel purchase contracts under which it has 57.9 million gallons remaining to be purchased for a total of $184,918. These fuel purchase contracts expire on or before December 31, 2024. During the years ended December 31, 2022, 2021 and 2020, the Company paid $112,136, $100,220 and $93,813, respectively, under the respective fuel purchase contracts then outstanding. As of December 31, 2022, future minimum purchase commitments, by calendar year, are as follows: ​ ​ ​ ​ ​ 2023 $ 149,858 2024 ​ 35,060 ​ ​ $ 184,918 ​ CONTINGENCIES Environmental Risks The Company expenses costs incurred to investigate and remediate environmental issues unless they extend the economic useful lives of the related assets. The Company records liabilities when it is probable that an obligation has been incurred and the amounts can be reasonably estimated. The remediation reserves cover anticipated costs, including remediation of environmental damage that waste facilities may have caused to neighboring landowners or residents as a result of contamination of soil, groundwater or surface water, including damage resulting from conditions existing prior to the Company’s acquisition of such facilities. The Company’s estimates are based primarily on investigations and remediation plans established by independent consultants, regulatory agencies and potentially responsible third parties. The Company does not discount remediation obligations. At December 31, 2022 and 2021, the current portion of remediation reserves was $3,165 and $2,300, respectively, which is included in Accrued liabilities in the Consolidated Balance Sheets. At December 31, 2022 and 2021, the long-term portion of remediation reserves was $17,284 and $20,483, respectively, which is included in Other long-term liabilities in the Consolidated Balance Sheets. Any substantial increase in the liabilities for remediation of environmental damage incurred by the Company could have a material adverse effect on the Company’s financial condition, results of operations or cash flows. Legal Proceedings In the normal course of its business and as a result of the extensive governmental regulation of the solid waste and E&P waste industries, the Company is subject to various judicial and administrative proceedings involving Canadian regulatory authorities as well as U.S. federal, state and local agencies. In these proceedings, an agency may subpoena the Company for records, or seek to impose fines on the Company or revoke or deny renewal of an authorization held by the Company, including an operating permit. From time to time, the Company may also be subject to actions brought by special interest or other groups, adjacent landowners or residents in connection with the permitting and licensing of landfills, transfer stations, and E&P waste treatment, recovery and disposal operations, or alleging environmental damage or violations of the permits and licenses pursuant to which the Company operates. The Company uses $1,000 as a threshold (up from the previously required threshold of $300) for disclosing environmental matters involving potential monetary sanctions. In addition, the Company is a party to various claims and suits pending for alleged damages to persons and property, alleged violations of certain laws and alleged liabilities arising out of matters occurring during the normal operation of the Company’s business. Except as noted in the matters described below, as of December 31, 2022, there is no current proceeding or litigation involving the Company or its property that the Company believes could have a material adverse effect on its business, financial condition, results of operations or cash flows. Jefferson Parish, Louisiana Landfill Litigation Between June 2016 and December 31, 2020, one of the Company’s subsidiaries, Louisiana Regional Landfill Company (“LRLC”), conducted certain operations at a municipal solid waste landfill known as the Jefferson Parish Landfill (the “Landfill”), located in Avondale, Louisiana, near the City of New Orleans. LRLC’s operations were governed by an Operating Agreement, entered into in May 2012 by LRLC under its previous name, IESI LA Landfill Corporation, and the owner of the Landfill, Jefferson Parish (the “Parish”). The Parish also holds the State of Louisiana permit for the operation of the Landfill. Aptim Corporation operated the landfill gas collection system at the Landfill under a separate contract with the Parish. In July and August 2018, four separate lawsuits seeking class action status were filed against LRLC and certain other Company subsidiaries, the Parish, and Aptim Corporation in Louisiana state court, and subsequently removed to the United States District Court for the Eastern District of Louisiana, before Judge Susie Morgan in New Orleans. The Court later consolidated the claims of the putative class action plaintiffs. Beginning in December 2018, a series of 11 substantively identical mass actions were filed in Louisiana state court against LRLC and certain other Company subsidiaries, the Parish, and Aptim Corporation. The claims of the mass action plaintiffs were consolidated in federal court in the Eastern District of Louisiana, also before Judge Susie Morgan (the “Addison” action). The putative class actions and the Addison action assert claims for damages from odors allegedly emanating from the Landfill. The consolidated putative class action complaint alleges that the Landfill released “noxious odors” into the plaintiffs’ properties and the surrounding community and asserts a range of liability theories—nuisance, negligence (since dismissed), and strict liability—against all defendants. The putative class is described as all residents of Jefferson Parish who have sustained legally cognizable damages as a result of odors from the Landfill, but the complaint proposes to revise the geographic definition based on further evidence. The putative class plaintiffs seek unspecified damages for unidentified nuisance and property value diminution. The Addison plaintiffs assert claims for nuisance, negligence, and (with respect to the Parish) unconstitutional takings under the Louisiana constitution; on behalf of two plaintiffs, the Addison complaint also asserts claims for wrongful death and survivorship. The Court held an eight-day trial on general causation during January and February 2022. General causation was to address the questions of whether the Landfill could cause odors and emissions that are able to reach plaintiffs’ properties and whether those odors and emissions could result in the types of medical impacts and nuisance conditions complained of by the putative class and mass action plaintiffs. Among other things, defendants urged the court to find general causation tied to the geographic limits of landfill emissions that may have the potential to cause a nuisance based on air modeling done by defendants’ experts. On November 29, 2022, the Court issued a 45-page decision on the general causation trial. The Court concluded that all putative class and mass action plaintiffs established general causation—specifically that emissions and gases from the Landfill were capable of causing certain damages alleged by the plaintiffs. The Court held that it only needed to determine the level of exposure necessary to result in injuries and that the level existed somewhere offsite, and that it was not required to delineate this level of exposure within a geographic area. The Court did, however, limit the time period for damages, to between July 2017 and December 2019, and the types of alleged injuries for which the plaintiffs are able to seek damages, to headaches, nausea, vomiting, loss of appetite, sleep disruption, dizziness, fatigue, anxiety and worry, a decrease in quality of life, and loss of enjoyment or use of property. The Addison The Court has held two case management conferences since the general causation decision to discuss how to proceed with the class and mass action cases, and the Court has proposed trying certain Addison The Company has already obtained dismissal of approximately one third of the original Addison plaintiffs, the number of which now total 547, and believes it has strong defenses to the merits of the mass actions, including specific causation issues due to other odor sources in the area. The Company also believes it has strong defenses to certification of the putative class actions, although the Court has not yet indicated when it will allow certification to be briefed and decided. The Company is continuing to vigorously defend itself in these lawsuits; however, at this time, the Company is not able to determine the likelihood of any outcome regarding the underlying claims, including the allocation of any potential liability among the Company, the Parish and Aptim Corporation. Los Angeles County, California Landfill Expansion Litigation A. Chiquita Canyon, LLC Lawsuit Against Los Angeles County In October 2004, the Company’s subsidiary, Chiquita Canyon, LLC (“CCL”), then under prior ownership, filed an application (the “Application”) with the County of Los Angeles (the “County”) Department of Regional Planning (“DRP”) for a conditional use permit (the “CUP”) to authorize the continued operation and expansion of the Chiquita Canyon Landfill (the “Landfill”). The Landfill has operated since 1972, and as a regional landfill, accepted approximately 2.6 million tons of materials for disposal and beneficial use in 2022. The Application requested expansion of the existing waste footprint on CCL’s contiguous property, an increase in maximum elevation, creation of a new entrance and new support facilities, construction of a facility for the County or another third-party operator to host household hazardous waste collection events, designation of an area for mixed organics/composting, and other modifications. After many years of reviews and delays, upon the recommendation of County staff, the County’s Regional Planning Commission (the “Commission”) approved the Application on April 19, 2017, but imposed operating conditions, fees and exactions that substantially reduced the historical landfill operations and represented a large increase in aggregate taxes and fees. CCL objected to many of the requirements imposed by the Commission. Current estimates for new costs imposed on CCL under the CUP are in excess of $300,000. CCL appealed the Commission’s decision to the County Board of Supervisors, but the appeal was not successful. At a subsequent hearing, on July 25, 2017, the Board of Supervisors approved the CUP. On October 20, 2017, CCL filed in the Superior Court of California, County of Los Angeles a verified petition for writ of mandate and complaint against the County and the County Board of Supervisors captioned Chiquita Canyon, LLC v. County of Los Angeles, No. BS171262 (Los Angeles Co. Super Ct.) (the “Complaint”). The Complaint challenges the terms of the CUP in 13 counts generally alleging that the County violated multiple California and federal statutes and California and federal constitutional protections. CCL seeks the following relief: (a) an injunction and writ of mandate against certain of the CUP’s operational restrictions, taxes and fees, (b) a declaration that the challenged conditions are unconstitutional and in violation of state and federal statutes, (c) reimbursement for any such illegal fees paid under protest, (d) damages, (e) an award of just compensation for a taking, (f) attorney fees, and (g) all other appropriate legal and equitable relief. Following extensive litigation in 2018 and 2019 on the permissible scope of CCL’s challenge, the Superior Court issued its decision on July 2, 2020, granting CCL’s petition for writ of mandate in part and denying it in part. CCL prevailed with respect to 12 of the challenged conditions, many of which imposed new fees and exactions on the Landfill. On October 11, 2022, CCL and the County entered into a settlement agreement that requires Chiquita to file a CUP modification application with the County embodying the terms of the settlement agreement. Chiquita filed the CUP modification application on November 10, 2022. If the CUP modification application is approved by the County and certain other contingencies are satisfied, Chiquita will dismiss this lawsuit. However, at this time, the Company is not able to determine the likelihood of any outcome in this matter. B. December 11, 2017 Notice of Violation Regarding Certain CUP Conditions. The County, through its DRP, issued a Notice of Violation, dated December 11, 2017 (the “NOV”), alleging that CCL violated certain conditions of the CUP, including Condition 79(B)(6) of the CUP by failing to pay an $11,600 Bridge & Thoroughfare Fee (“B&T Fee”) that was purportedly due on July 25, 2017. The alleged B&T fee was ostensibly to fund the construction of transportation infrastructure in the area of the Landfill. At the time the NOV was issued, CCL had already contested the legality of the B&T fee in the October 20, 2017 Complaint filed against the County in Los Angeles County Superior Court, described above under paragraph A (the “CUP lawsuit”). On January 12, 2018, CCL filed an appeal of the alleged violations in the NOV. Subsequently, CCL filed additional legal arguments and exhibits contesting the NOV. On March 6, 2018, a DRP employee designated as hearing officer sustained the NOV, including the $11,600 B&T fee, and imposed an administrative penalty in the amount of $83 and a noncompliance fee of $0.75. A written decision memorializing the hearing officer’s findings and order was issued on July 10, 2018. On April 13, 2018, CCL filed in the Superior Court of California, County of Los Angeles a Petition for Writ of Administrative Mandamus against the County seeking to overturn the decision sustaining the NOV, contending that the NOV and decision are not supported by the facts or law. On July 17, 2018, the Court granted CCL leave to pay the $11,600 B&T fee and to amend its Complaint in the CUP lawsuit to reflect the payment under protest, allowing the challenge to the B&T fee under the Mitigation Fee Act to proceed in the CUP lawsuit. CCL paid the B&T fee under protest on August 10, 2018, and also paid on that date the administrative penalty of $83 and a noncompliance fee of $0.75. The Court indicated that the NOV case would be coordinated with the CUP lawsuit. On October 11, 2022, CCL and the County entered into a settlement agreement, described above under paragraph A. If the CUP modification application is approved by the County and certain other contingencies are satisfied, Chiquita will dismiss this lawsuit. However, at this time, the Company is not able to determine the likelihood of any outcome in this matter. Collective Bargaining Agreements Seventeen of the Company’s collective bargaining agreements have expired or are set to expire in 2023. The Company does not expect any significant disruption in its overall business in 2023 as a result of labor negotiations, employee strikes or organizational efforts.

Shareholders' Equity_2

Shareholders' Equity	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Shareholders' Equity [Abstract]
Shareholders' Equity	16. Share-Based Compensation Restricted Share Units A summary of activity related to restricted share units (“RSUs”) during the three-month period ended March 31, 2023, is presented below: ​ ​ ​ ​ ​ Unvested Shares Outstanding at December 31, 2022 955,999 Granted 403,026 Forfeited (13,835) Vested and issued (325,490) Outstanding at March 31, 2023 1,019,700 ​ The weighted average grant-date fair value per share for the common shares underlying the RSUs granted during the three-month period ended March 31, 2023 was $133.46. Recipients of the Company’s RSUs who participate in the Company’s Nonqualified Deferred Compensation Plan may have elected in years prior to 2015 to defer some or all of their RSUs as they vest until a specified date or dates they choose. At the end of the deferral periods, unless a qualified participant makes certain other elections, the Company issues to recipients who deferred their RSUs common shares of the Company underlying the deferred RSUs. At March 31, 2023 and 2022, the Company had 62,201 and 81,712 vested deferred RSUs outstanding, respectively. Performance-Based Restricted Share Units A summary of activity related to performance-based restricted share units (“PSUs”) during the three-month period ended March 31, 2023, is presented below: ​ ​ ​ ​ ​ Unvested Shares Outstanding at December 31, 2022 341,850 Granted 105,581 Vested and issued (140,498) Outstanding at March 31, 2023 306,933 ​ During the three months ended March 31, 2023, the Company’s Compensation Committee granted PSUs with three-year performance-based metrics that the Company must meet before those awards may be earned, and the performance period for those grants ends on December 31, 2025. The Compensation Committee will determine the achievement of performance results and corresponding vesting of PSUs for each performance period. The weighted average grant-date fair value per share for the common shares underlying all PSUs granted during the three-month period ended March 31, 2023 was $133.30. Deferred Share Units A summary of activity related to deferred share units (“DSUs”) during the three-month period ended March 31, 2023, is presented below: ​ ​ ​ ​ ​ Vested Shares Outstanding at December 31, 2022 26,536 Granted 3,945 Outstanding at March 31, 2023 30,481 ​ The DSUs consist of a combination of DSU grants outstanding under the Progressive Waste share-based compensation plans that were continued by the Company following the Progressive Waste acquisition and DSUs granted by the Company since the Progressive Waste acquisition. The weighted average grant-date fair value per share for the common shares underlying the DSUs granted during the three-month period ended March 31, 2023 was $136.47. Other Restricted Share Units RSU grants outstanding under the Progressive Waste share-based compensation plans were continued by the Company following the Progressive Waste acquisition and allow for the issuance of shares or cash settlement to employees upon vesting. A summary of activity related to Progressive Waste RSUs during the three-month period ended March 31, 2023, is presented below: ​ ​ ​ ​ Outstanding at December 31, 2022 57,829 Cash settled (5,803) Outstanding at March 31, 2023 52,026 ​ No RSUs under the Progressive Waste share-based compensation plans were granted subsequent to June 1, 2016. All remaining RSUs were vested as of March 31, 2019. Share-Based Options Share-based options outstanding under the Progressive Waste share-based compensation plans were continued by the Company following the Progressive Waste acquisition and allow for the issuance of shares or cash settlement to employees upon vesting. A summary of activity related to Progressive Waste share-based options during the three-month period ended March 31, 2023, is presented below: ​ ​ ​ ​ Outstanding at December 31, 2022 43,570 Cash settled — Outstanding at March 31, 2023 43,570 ​ No share-based options under the Progressive Waste share-based compensation plans were granted subsequent to June 1, 2016. All outstanding share-based options were vested as of December 31, 2017. Employee Share Purchase Plan On May 15, 2020, the Company’s shareholders approved the 2020 Employee Share Purchase Plan (the “ESPP”). Under the ESPP, qualified employees may elect to have payroll deductions withheld from their eligible compensation on each payroll date in amounts equal to or greater than one percent (1%) but not in excess of ten percent (10%) of eligible compensation in order to purchase the Company’s common shares under certain terms and subject to certain restrictions set forth in the ESPP. The exercise price is equal to 95% of the closing price of the Company’s common shares on the last day of the relevant offering period, provided, however, that such exercise price will not be less than 85% of the volume weighted average price of the Company’s common shares as reflected on the Toronto Stock Exchange (the “TSX”) over the final five trading days of such offering period. The maximum number of shares that may be issued under the ESPP is 1,000,000. Under the ESPP, employees purchased 14,594 of the Company’s common shares for $1,841 during the three months ended March 31, 2023. Under the ESPP, employees purchased 12,015 of the Company’s common shares for $1,554 during the three months ended March 31, 2022. Normal Course Issuer Bid On July 26, 2022, the Board of Directors of the Company approved, subject to receipt of regulatory approvals, the annual renewal of the Company’s normal course issuer bid (the “NCIB”) to purchase up to 12,859,066 of the Company’s common shares during the period of August 10, 2022 to August 9, 2023 or until such earlier time as the NCIB is completed or terminated at the option of the Company. The renewal followed the conclusion of the Company’s NCIB that expired August 9, 2022. The Company received TSX approval for its annual renewal of the NCIB on August 8, 2022. Under the NCIB, the Company may make share repurchases only in the open market, including on the New York Stock Exchange (the “NYSE”), the TSX, and/or alternative Canadian trading systems, at the prevailing market price at the time of the transaction. In accordance with TSX rules, any daily repurchases made through the TSX and alternative Canadian trading systems is limited to a maximum of 85,956 common shares, which represents 25% of the average daily trading volume on the TSX of 343,825 common shares for the period from February 1, 2022 to July 31, 2022. The TSX rules also allow the Company to purchase, once a week, a block of common shares not owned by any insiders, which may exceed such daily limit. The maximum number of shares that can be purchased per day on the NYSE will be 25% of the average daily trading volume for the four calendar weeks preceding the date of purchase, subject to certain exceptions for block purchases. The timing and amounts of any repurchases pursuant to the NCIB will depend on many factors, including the Company’s capital structure, the market price of the common shares and overall market conditions. All common shares purchased under the NCIB shall be immediately cancelled following their repurchase. For the three months ended March 31, 2023, the Company did not repurchase any Cash Dividend In November 2022, the Company announced that its Board of Directors increased its regular quarterly cash dividend by $0.025, from $0.23 to $0.255 per Company common share. Cash dividends of $65,788 and $59,391 were paid during the three months ended March 31, 2023 and 2022, respectively.	14. SHAREHOLDERS’ EQUITY Employee Share Purchase Plan On May 15, 2020, the Company’s shareholders approved the ESPP. Under the ESPP, qualified employees may elect to have payroll deductions withheld from their eligible compensation on each payroll date in amounts equal to or greater than one percent (1%) but not in excess of ten percent (10%) of eligible compensation in order to purchase the Company’s common shares under certain terms and subject to certain restrictions set forth in the ESPP. The exercise price is equal to 95% of the closing price of the Company’s common shares on the last day of the relevant offering period; provided, however, that such exercise price will not be less than 85% of the volume weighted average price of the Company’s common shares as reflected on the TSX over the final five trading days of such offering period. The maximum number of shares that may be issued under the ESPP is 1,000,000. Under the ESPP, employees purchased 26,582 of the Company’s common shares for $3,270 during the year ended December 31, 2022. Under the ESPP, employees purchased 10,813 of the Company’s common shares for $1,222 during the year ended December 31, 2021. Cash Dividend The Board of Directors of the Company authorized the initiation of a quarterly cash dividend in October 2010 and has increased it on an annual basis. In November 2022, the Company announced that its Board of Directors increased its regular quarterly cash dividend by $0.025, from $0.23 to $0.255 per Company common share. Cash dividends of $243,013, $220,203 and $199,883 were paid during the years ended December 31, 2022, 2021 and 2020, respectively. Normal Course Issuer Bid On July 26, 2022, the Board of Directors of the Company approved, subject to receipt of regulatory approvals, the annual renewal of the Company’s normal course issuer bid (the “NCIB”) to purchase up to 12,859,066 of the Company’s common shares during the period of August 10, 2022 to August 9, 2023 or until such earlier time as the NCIB is completed or terminated at the option of the Company. The renewal followed the conclusion of the Company’s NCIB that expired August 9, 2022. The Company received TSX approval for its annual renewal of the NCIB on August 8, 2022. Under the NCIB, the Company may make share repurchases only in the open market, including on the NYSE, the TSX, and/or alternative Canadian trading systems, at the prevailing market price at the time of the transaction. In accordance with TSX rules, any daily repurchases made through the TSX and alternative Canadian trading systems is limited to a maximum of 85,956 common shares, which represents 25% of the average daily trading volume on the TSX of 343,825 common shares for the period from February 1, 2022 to July 31, 2022. The TSX rules also allow the Company to purchase, once a week, a block of common shares not owned by any insiders, which may exceed such daily limit. The maximum number of shares that can be purchased per day on the NYSE will be 25% of the average daily trading volume for the four calendar weeks preceding the date of purchase, subject to certain exceptions for block purchases. The timing and amounts of any repurchases pursuant to the NCIB will depend on many factors, including the Company’s capital structure, the market price of the common shares and overall market conditions. All common shares purchased under the NCIB will be immediately cancelled following their repurchase. For the year ended December 31, 2022, the Company repurchased 3,388,155 common shares pursuant to the NCIB in effect during that period at an aggregate cost of $424,999. For the year ended December 31, 2021, the Company repurchased 3,003,822 common shares pursuant to the NCIB in effect during that period at an aggregate cost of $338,993. For the year ended December 31, 2020, the Company repurchased 1,271,977 common shares pursuant to the NCIB in effect during that period at an aggregate cost of $105,654. As of December 31, 2022, the remaining maximum number of shares available for repurchase under the NCIB was 12,859,066. Common Shares The Company is authorized to issue an unlimited number of common shares, that have no par value, and uses reserved but unissued common shares to satisfy its obligations under its equity-based compensation plans. As of December 31, 2022, the Company has reserved the following common shares for issuance: ​ ​ ​ ​ For outstanding RSUs, PSUs and warrants 2,233,831 For future grants under the 2016 Incentive Award Plan 3,262,941 For future grants under the Employee Share Purchase Plan ​ 948,011 ​ 6,444,783 ​ Common Shares Held in Trust Common shares held in trust at December 31, 2022 consist of 65,459 shares of the Company held in a trust that were acquired by Progressive Waste prior to June 1, 2016 for the benefit of its U.S. and Canadian employees participating in certain share-based compensation plans. A total of 735,171 common shares were held in the trust on June 1, 2016 when it was acquired by the Company in the Progressive Waste acquisition. Common shares held in trust are classified as treasury shares in the Company’s Consolidated Balance Sheets. The Company will sell shares out of the trust and remit cash or shares to employees and non-employee directors as restricted share units vest and deferred share units settle, under the Progressive Waste share-based compensation plans that were continued by the Company. During the years ended December 31, 2022, 2021 and 2020, the Company sold 5,203, 3,522 and 7,330 common shares held in the trust, respectively, to settle vested restricted share units and deferred share units. Special Shares The Company is authorized to issue an unlimited number of special shares. Holders of special shares are entitled to one vote in matters of the Company for each special share held. The special shares carry no right to receive dividends or to receive the remaining property or assets of the Company upon dissolution or wind-up. At December 31, 2022, 2021 and 2020, no special shares were issued. Preferred Shares The Company is authorized to issue an unlimited number of preferred shares, issuable in series. Each series of preferred shares issued shall have rights, privileges, restrictions and conditions as determined by the Board of Directors prior to their issuance. Preferred shareholders are not entitled to vote, but take preference over the common shareholders rights in the remaining property and assets of the Company in the event of dissolution or wind-up. At December 31, 2022, 2021 and 2020, no preferred shares were issued. Restricted Share Units, Performance-Based Restricted Share Units, Share Options and Share Purchase Warrants In connection with the Progressive Waste acquisition, each Waste Connections US, Inc. restricted stock unit award, deferred restricted stock unit award and warrant outstanding immediately prior to the Progressive Waste acquisition was automatically converted into a restricted share unit award, deferred restricted share unit award or warrant, as applicable, relating to an equal number of common shares of the Company, on the same terms and conditions as were applicable immediately prior to the Progressive Waste acquisition under such equity award. Such conversion of equity awards was approved by the Company’s shareholders at its shareholder meeting as part of the shareholders’ approval of the Progressive Waste acquisition. At its meeting on June 1, 2016, the Company’s Board of Directors approved the assumption by the Company of the Waste Connections US, Inc. 2014 Incentive Plan Award (the “2014 Plan”), the Waste Connections US, Inc. Third Amended and Restated 2004 Equity Incentive Plan (the “2004 Plan”), and the Waste Connections US, Inc. Consultant Incentive Plan (the “Consultant Plan,” and, together with the 2014 Plan and the 2004 Plan, the “Assumed Plans”) for the purposes of administering the Assumed Plans and the awards issued thereunder. No additional awards will be made under any of the Assumed Plans. Upon the vesting, expiration, exercise in accordance with their terms or other settlement of all of the awards made pursuant to an Assumed Plan, such Assumed Plan shall automatically terminate. The 2014 Plan and the Consultant Plan have each automatically terminated. Participation in the 2004 Plan was limited to employees, officers, directors and consultants. Restricted share units (“RSUs”) granted under the 2004 Plan generally vest in installments pursuant to a vesting schedule set forth in each agreement. The Board of Directors authorized the granting of awards under the 2004 Plan, and determined the employees and consultants to whom such awards were to be granted, the number of shares subject to each award, and the exercise price, term, vesting schedule and other terms and conditions of each award. RSU awards granted under the plan did not require any cash payment from the participant to whom an award was made. No grants have been made under the 2004 Plan since May 16, 2014 pursuant to the approval by the stockholders of the 2014 Plan on such date. On June 1, 2016, the Company’s Board of Directors adopted the 2016 Incentive Award Plan (the “2016 Plan”), which was approved by Progressive Waste’s shareholders on May 26, 2016. On each of July 24, 2017 and 2018, the Board of Directors approved certain housekeeping amendments to the 2016 Plan. The 2016 Plan, as amended, is administered by the Company’s Compensation Committee and provides that the aggregate number of common shares which may be issued from treasury pursuant to awards made under the 2016 Plan is 7,500,000 common shares. Awards under the 2016 Plan may be made to employees, consultants and non-employee directors and may be made in the form of options, warrants, restricted shares, restricted share units, performance awards (which may be paid in cash, common shares, or a combination thereof), dividend equivalent awards (representing a right of the holder thereof to receive the equivalent value (which may be paid in cash or common shares) of dividends paid on common shares), and share payments (a payment in the form of common shares or an option or other right to purchase common shares as part of a bonus, defined compensation or other arrangement). Non-employee directors are also eligible to receive deferred share units, which represent the right to receive a cash payment or its equivalent in common shares (or a combination of cash and common shares), or which may at the time of grant be expressly limited to settlement only in cash and not in common shares. Restricted Share Units A summary of the Company’s RSU activity is presented below: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ 2022 2021 2020 Weighted average grant-date fair value of restricted share units granted ​ $ 121.26 ​ $ 100.27 ​ $ 101.79 Total fair value of restricted share units vested ​ $ 28,751 ​ $ 26,711 ​ $ 23,742 ​ A summary of activity related to RSUs during the year ended December 31, 2022, is presented below: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted-Average ​ ​ ​ ​ Grant Date Fair ​ Unvested Shares ​ Value Per Share Outstanding at December 31, 2021 861,695 ​ $ 95.63 Granted 483,281 ​ $ 121.26 Forfeited (70,126) ​ $ 110.86 Vested and issued (318,851) ​ $ 90.17 Outstanding at December 31, 2022 955,999 ​ $ 109.29 ​ Recipients of the Company’s RSUs who participate in the Company’s Nonqualified Deferred Compensation Plan may have elected in years prior to 2015 to defer some or all of their RSUs as they vest until a specified date or dates they choose. At the end of the deferral periods, unless a qualified participant makes certain other elections, the Company issues to recipients who deferred their RSUs common shares of the Company underlying the deferred RSUs. At December 31, 2022, 2021 and 2020, the Company had 81,352, 100,861 and 177,760 vested deferred RSUs outstanding, respectively. Performance-Based Restricted Share Units A summary of the Company’s PSU activity is presented below: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ 2022 2021 2020 Weighted average grant-date fair value of PSUs granted ​ $ 117.94 ​ $ 96.99 ​ $ 87.19 Total fair value of PSUs vested ​ $ 4,674 ​ $ 10,954 ​ $ 15,628 ​ A summary of activity related to PSUs during the year ended December 31, 2022, is presented below: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted-Average ​ ​ ​ ​ Grant Date Fair ​ Unvested Shares ​ Value Per Share Outstanding at December 31, 2021 392,043 ​ $ 91.63 Granted 95,038 ​ $ 117.94 Forfeited (87,554) ​ $ 80.70 Vested and issued (57,677) ​ $ 81.04 Outstanding at December 31, 2022 341,850 ​ $ 103.53 ​ During the year ended December 31, 2022, the Company’s Compensation Committee granted PSUs with three-year performance-based metrics that the Company must meet before those awards may be earned, and the performance period for those grants ends on December 31, 2024. During the year ended December 31, 2021, the Company’s Compensation Committee granted PSUs with three-year performance-based metrics that the Company must meet before those awards may be earned, and the performance period for those grants ends on December 31, 2023. During the year ended December 31, 2020, the Company’s Compensation Committee granted PSUs with three-year performance-based metrics that the Company was required to meet before those awards were earned, and the performance period for those grants ended on December 31, 2022. During the same period, the Company’s Compensation Committee also granted PSUs with a one-year performance-based metric that the Company was required to meet before those awards were earned, with the awards then subject to time-based vesting for the remaining three years of their four-year vesting period. The Compensation Committee determines the achievement of performance results and corresponding vesting of PSUs for each performance period. Share Purchase Warrants The Company has outstanding share purchase warrants issued under the 2016 Plan. Warrants to purchase the Company’s common shares were issued to certain consultants to the Company. Warrants issued were fully vested and exercisable at the date of grant. Warrants outstanding at December 31, 2022, expire between 2023 and 2027. A summary of warrant activity during the year ended December 31, 2022, is presented below: ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted-Average ​ ​ Warrants ​ Exercise Price Outstanding at December 31, 2021 578,405 ​ $ 104.82 Granted 380,478 ​ $ 138.33 Forfeited (65,331) ​ $ 80.49 Exercised (38,922) ​ $ 78.24 Outstanding at December 31, 2022 854,630 ​ $ 122.81 ​ The following table summarizes information about warrants outstanding as of December 31, 2022 and 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value of ​ ​ ​ ​ ​ ​ Warrants ​ ​ ​ Warrants ​ Outstanding at December 31, Grant Date ​ Issued ​ Exercise Price ​ Issued ​ 2022 ​ 2021 Throughout 2017 35,382 ​ $53.65 to $69.96 ​ $ 595 — 1,521 Throughout 2018 163,995 ​ $70.91 to $80.90 ​ $ 2,591 45,024 112,756 Throughout 2019 ​ 151,008 ​ $74.25 to $95.61 ​ $ 2,634 ​ 66,977 ​ 101,977 Throughout 2020 ​ 164,890 ​ $72.65 to $104.89 ​ $ 3,140 ​ 146,386 ​ 146,386 Throughout 2021 ​ 218,166 ​ $99.33 to $135.97 ​ $ 5,584 ​ 215,765 ​ 215,765 Throughout 2022 ​ 380,478 ​ $125.32 to $143.95 ​ $ 12,972 ​ 380,478 ​ — ​ ​ ​ ​ ​ ​ ​ 854,630 578,405 ​ Deferred Share Units A summary of the Company’s deferred share units (“DSUs”) activity is presented below: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ 2022 ​ 2021 2020 Weighted average grant-date fair value of DSUs granted ​ $ 121.00 ​ $ 99.80 ​ $ 103.81 Total fair value of DSUs awarded ​ $ 253 ​ $ 285 ​ $ 272 ​ The DSUs consist of a combination of DSU grants outstanding under the Progressive Waste share-based compensation plans that were continued by the Company following the Progressive Waste acquisition and DSUs granted by the Company since the Progressive Waste acquisition. A summary of activity related to DSUs during the year ended December 31, 2022, is presented below: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted-Average ​ ​ ​ ​ Grant Date Fair ​ Vested Shares ​ Value Per Share Outstanding at December 31, 2021 24,442 ​ $ 64.05 Granted 2,094 ​ $ 121.00 Outstanding at December 31, 2022 26,536 ​ $ 68.55 ​ Other Restricted Share Units RSU grants outstanding under the Progressive Waste share-based compensation plans were continued by the Company following the Progressive Waste acquisition and allow for the issuance of shares or cash settlement to employees upon vesting. A summary of activity related to Progressive Waste RSUs during the year ended December 31, 2022, is presented below: ​ ​ ​ ​ Outstanding at December 31, 2021 63,032 Cash settled (5,203) Outstanding at December 31, 2022 57,829 ​ No RSUs under the Progressive Waste share-based compensation plans were granted subsequent to June 1, 2016. All remaining RSUs were vested as of December 31, 2019. Share-Based Options Share-based options outstanding under the Progressive Waste share-based compensation plans were continued by the Company following the Progressive Waste acquisition and allow for the issuance of shares or cash settlement to employees upon vesting. A summary of activity related to Progressive Waste share-based options during the year ended December 31, 2022, is presented below: ​ ​ ​ ​ Outstanding at December 31, 2021 45,869 Cash settled (2,299) Outstanding at December 31, 2022 43,570 ​ No share-based options under the Progressive Waste share-based compensation plans were granted subsequent to June 1, 2016. All outstanding share-based options were vested as of December 31, 2017.

Other Comprehensive Income (L_5

Other Comprehensive Income (Loss)	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Other Comprehensive Income (Loss) [Abstract]
Other Comprehensive Income (Loss)	15. Other comprehensive income (loss) includes changes in the fair value of interest rate swaps that qualify for hedge accounting. The components of other comprehensive income (loss) and related tax effects for the three months ended March 31, 2023 and 2022 are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 31, 2023 ​ Gross Tax Effect Net of Tax Interest rate swap amounts reclassified into interest expense ​ $ (4,080) ​ ​ 1,081 ​ $ (2,999) Changes in fair value of interest rate swaps ​ (3,299) ​ ​ 874 ​ (2,425) Foreign currency translation adjustment ​ 1,682 ​ — ​ 1,682 ​ ​ $ (5,697) ​ $ 1,955 ​ $ (3,742) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 31, 2022 ​ Gross Tax Effect Net of Tax Interest rate swap amounts reclassified into interest expense ​ $ 4,750 ​ $ (1,259) ​ $ 3,491 Changes in fair value of interest rate swaps ​ 44,699 ​ (11,845) ​ 32,854 Foreign currency translation adjustment ​ 34,429 ​ — ​ 34,429 ​ ​ $ 83,878 ​ $ (13,104) ​ $ 70,774 ​ A rollforward of the amounts included in AOCIL, net of taxes, for the three months ended March 31, 2023 and 2022, is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Foreign Accumulated ​ ​ ​ ​ ​ Currency ​ Other ​ ​ Interest ​ Translation ​ Comprehensive ​ ​ Rate Swaps ​ Adjustment ​ Income (Loss) Balance at December 31, 2022 ​ $ 23,378 ​ $ (80,208) ​ $ (56,830) Amounts reclassified into earnings ​ ​ (2,999) ​ ​ — ​ ​ (2,999) Changes in fair value ​ ​ (2,425) ​ ​ — ​ ​ (2,425) Foreign currency translation adjustment ​ ​ — ​ ​ 1,682 ​ ​ 1,682 Balance at March 31, 2023 ​ $ 17,954 ​ $ (78,526) ​ $ (60,572) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Foreign Accumulated ​ ​ ​ ​ ​ Currency ​ Other ​ ​ Interest ​ Translation ​ Comprehensive ​ ​ Rate Swaps ​ Adjustment ​ Income (Loss) Balance at December 31, 2021 ​ $ (37,544) ​ $ 77,128 ​ $ 39,584 Amounts reclassified into earnings ​ 3,491 ​ — ​ 3,491 Changes in fair value ​ 32,854 ​ — ​ 32,854 Foreign currency translation adjustment ​ — ​ 34,429 ​ 34,429 Balance at March 31, 2022 ​ $ (1,199) ​ $ 111,557 ​ $ 110,358 ​ See Note 11 for further discussion on the Company’s derivative instruments.	15. OTHER COMPREHENSIVE INCOME (LOSS) Other comprehensive income (loss) includes changes in the fair value of interest rate swaps that qualify for hedge accounting. The components of other comprehensive income (loss) and related tax effects for the years ended December 31, 2022, 2021 and 2020, are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, 2022 ​ Gross Tax Effect Net of Tax Interest rate swap amounts reclassified into interest expense ​ $ 6,551 ​ $ (1,736) ​ $ 4,815 Changes in fair value of interest rate swaps ​ 76,336 ​ (20,229) ​ 56,107 Foreign currency translation adjustment ​ (157,336) ​ — ​ (157,336) ​ ​ $ (74,449) ​ $ (21,965) ​ $ (96,414) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, 2021 ​ Gross Tax Effect Net of Tax Interest rate swap amounts reclassified into interest expense ​ $ 20,321 ​ $ (5,385) ​ $ 14,936 Changes in fair value of interest rate swaps ​ 23,287 ​ (6,171) ​ 17,116 Foreign currency translation adjustment ​ 8,183 ​ — ​ 8,183 ​ ​ $ 51,791 ​ $ (11,556) ​ $ 40,235 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, 2020 ​ Gross Tax Effect Net of Tax Interest rate swap amounts reclassified into interest expense ​ $ 9,778 ​ $ (2,591) ​ $ 7,187 Changes in fair value of interest rate swaps ​ (64,664) ​ 17,136 ​ (47,528) Foreign currency translation adjustment ​ ​ 50,653 ​ ​ — ​ ​ 50,653 ​ ​ $ (4,233) ​ $ 14,545 ​ $ 10,312 ​ A roll forward of the amounts included in AOCIL, net of taxes, is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Foreign Accumulated ​ ​ ​ ​ ​ Currency ​ Other ​ ​ Interest ​ Translation ​ Comprehensive ​ ​ Rate Swaps ​ Adjustment ​ Income (Loss) Balance at December 31, 2020 ​ $ (69,596) ​ $ 68,945 ​ $ (651) Amounts reclassified into earnings ​ 14,936 ​ — ​ 14,936 Changes in fair value ​ 17,116 ​ — ​ 17,116 Foreign currency translation adjustment ​ — ​ 8,183 ​ 8,183 Balance at December 31, 2021 ​ ​ (37,544) ​ ​ 77,128 ​ ​ 39,584 Amounts reclassified into earnings ​ ​ 4,815 ​ ​ — ​ ​ 4,815 Changes in fair value ​ ​ 56,107 ​ ​ — ​ ​ 56,107 Foreign currency translation adjustment ​ ​ — ​ ​ (157,336) ​ ​ (157,336) Balance at December 31, 2022 ​ $ 23,378 ​ $ (80,208) ​ $ (56,830) ​

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2022
Income Taxes [Abstract]
Income Taxes	16. INCOME TAXES The Company’s operations are conducted through its various subsidiaries in countries throughout the world. The Company has provided for income taxes based upon the tax laws and rates in the countries in which operations are conducted and income is earned. Income before provision for income taxes consists of the following: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ 2022 2021 2020 U.S. ​ $ 734,126 ​ $ 574,737 ​ $ 22,349 Non – U.S. ​ 314,837 ​ 196,005 ​ 231,565 Income before income taxes ​ $ 1,048,963 ​ $ 770,742 ​ $ 253,914 ​ The provision for income taxes consists of the following: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ 2022 2021 2020 Current: ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Federal ​ $ 59,675 ​ $ 71,180 ​ $ 65,143 State ​ 28,770 ​ 34,439 ​ 28,325 Non – U.S. ​ 31,036 ​ 32,071 ​ 6,941 ​ ​ 119,481 ​ 137,690 ​ 100,409 Deferred: ​ ​ ​ U.S. Federal ​ 95,397 ​ 51,534 ​ (36,659) State ​ 16,840 ​ 5,093 ​ (8,762) Non – U.S. ​ (18,756) ​ (42,064) ​ (5,066) ​ ​ 93,481 ​ 14,563 ​ (50,487) Provision for income taxes ​ $ 212,962 ​ $ 152,253 ​ $ 49,922 ​ The Company is organized under the laws of Ontario, Canada; however, since the proportion of U.S. revenues, assets, operating income and associated tax provisions is significantly greater than any other single taxing jurisdiction within the worldwide group, the reconciliation of the differences between the Company’s income tax provision as presented in the accompanying Consolidated Statements of Net Income and income tax provision computed at the federal statutory rate is presented on the basis of the U.S. federal statutory income tax rate of 21%, as opposed to the Canadian statutory rate of approximately 27% to provide a more meaningful insight into those differences. The items shown in the following table are a percentage of pre-tax income: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ 2022 2021 2020 U.S. federal statutory rate ​ 21.0 % 21.0 % 21.0 % State taxes, net of federal benefit 4.2 4.7 4.5 ​ Deferred income tax liability adjustments — 0.3 1.6 ​ Effect of international operations (4.0) (6.3) (7.0) ​ Other (0.9) 0.1 (0.4) ​ ​ 20.3 % 19.8 % 19.7 % ​ The comparability of the Company’s income tax provision for the reported periods has been affected by variations in its income before income taxes. The effects of international operations are primarily due to a portion of the Company’s income from internal financing that is taxed at effective rates substantially lower than the U.S. federal statutory rate. For the year ended December 31, 2020, the Company’s income tax provision included a $27,358 expense associated with certain 2019 inter-entity payments no longer being deductible for tax purposes due to the finalization of tax regulations on April 7, 2020 under Internal Revenue Code Section 267A and a $4,148 expense related to an increase in the Company’s deferred income tax liabilities resulting from the impairment of certain assets within its E&P waste services which impacted the geographical apportionment of its state income taxes. The significant components of deferred income tax assets and liabilities, reduced by valuation allowances as applicable, are presented below: ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ ​ 2022 2021 Deferred income tax assets: ​ ​ Accrued expenses ​ $ 33,680 ​ $ 31,840 Compensation ​ 23,194 ​ 22,545 Contingent liabilities ​ 19,966 ​ 21,268 Tax credits and loss carryforwards ​ 33,019 ​ 24,415 Interest rate swaps ​ — ​ 13,536 Finance costs ​ 13,856 ​ 24,264 Gross deferred income tax assets ​ 123,715 ​ 137,868 Less: Valuation allowance ​ — ​ — Total deferred income tax assets ​ 123,715 ​ 137,868 ​ ​ ​ ​ ​ ​ ​ Deferred income tax liabilities: ​ ​ ​ ​ ​ ​ Goodwill and other intangibles ​ (434,500) ​ (397,855) Property and equipment ​ (579,615) ​ (484,519) Landfill closure and post-closure ​ (22,745) ​ (18,597) Prepaid expenses ​ (15,088) ​ (11,534) Investment in subsidiaries ​ (69,257) ​ (69,286) Interest rate swaps ​ (8,429) ​ — Other ​ ​ (7,823) ​ ​ (6,998) Total deferred income tax liabilities ​ (1,137,457) ​ (988,789) Net deferred income tax liability ​ $ (1,013,742) ​ $ (850,921) ​ The Company has $80,422 of Canadian tax loss carryforwards with a 20-year carryforward period which will begin to expire in 2036, as well as various U.S. state tax losses with carryforward periods up to 20 years. As of December 31, 2022, the Company had undistributed earnings of approximately $3,393,993 for which income taxes have not been provided on permanently reinvested earnings of approximately $2,218,993. Additionally, the Company has not recorded deferred taxes on the amount of financial reporting basis in excess of tax basis of approximately $366,457 attributable to the Company’s non-U.S. subsidiaries which are permanently reinvested. It is not practical to estimate the additional tax that may become payable upon the eventual repatriation of these amounts; however, the tax impacts could result in a material increase to the Company’s effective tax rate. The Company and its subsidiaries are subject to U.S. federal and Canadian income tax, which are its principal operating jurisdictions. The Company has concluded all U.S. federal income tax matters for years through 2018. Additionally, the normal reassessment period for the Company has expired for all Canadian federal income tax matters for years through 2017. The Company did not have any unrecognized tax benefits recorded at December 31, 2022, 2021 or 2020. The Company does not anticipate the total amount of unrecognized tax benefits will significantly change by December 31, 2023. The Company recognizes interest and/or penalties related to income tax matters in income tax expense.

Segment Reporting_2

Segment Reporting	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Segment Reporting [Abstract]
Segment Reporting	10. The Company’s revenues are generated from the collection, transfer, recycling and disposal of non-hazardous solid waste and the treatment, recovery and disposal of non-hazardous E&P waste. No single contract or customer accounted for more than 10% of the Company’s total revenues at the consolidated or reportable segment level during the periods presented. Effective April 1, 2023, the Company modified its organizational structure under new regional operating segments as the result of continued growth in its business. The Company now reports revenue and segment EBITDA based on the following six geographic solid waste operating segments: Southern, Western, Central, Eastern, Canada and MidSouth. A small number of operating locations have been reallocated from the Western segment to the Central segment, the previous Eastern segment has been bifurcated into two smaller geographies now referred to as the Eastern segment and MidSouth segment, and a small number of operating locations have been reallocated from the Southern segment to the MidSouth segment. The Company’s six geographic solid waste operating segments comprise its reportable segments. Each operating segment is responsible for managing several vertically integrated operations, which are comprised of districts. The segment information presented herein reflects the realignment of these regions. The Company’s Chief Operating Decision Maker evaluates operating segment profitability and determines resource allocations based on several factors, of which the primary financial measure is segment EBITDA. The Company defines segment EBITDA as earnings before interest, taxes, depreciation, amortization, impairments and other operating items, and other income (expense). Segment EBITDA is not a measure of operating income, operating performance or liquidity under GAAP and may not be comparable to similarly titled measures reported by other companies. The Company’s management uses segment EBITDA in the evaluation of segment operating performance as it is a profit measure that is generally within the control of the operating segments. A reconciliation of segment EBITDA to Income before income tax provision is included at the end of this Note 10. Summarized financial information concerning the Company’s reportable segments for the three months ended March 31, 2023 and 2022, is shown in the following tables: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ Intercompany Reported Segment March 31, 2023 ​ Revenue ​ Revenue (b) ​ Revenue ​ EBITDA (c) Southern ​ $ 451,000 ​ $ (51,107) ​ $ 399,893 ​ $ 121,914 Western ​ 444,796 ​ (48,957) ​ 395,839 ​ 110,689 Central ​ 383,525 ​ (43,540) ​ 339,985 ​ 115,756 Eastern ​ ​ 388,797 ​ ​ (59,669) ​ ​ 329,128 ​ ​ 73,275 Canada ​ 253,670 ​ (26,514) ​ 227,156 ​ 82,984 MidSouth ​ 251,085 ​ (42,583) ​ 208,502 ​ 57,731 Corporate (a) ​ — ​ — ​ — ​ (2,454) ​ ​ $ 2,172,873 ​ $ (272,370) ​ $ 1,900,503 ​ $ 559,895 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ Intercompany Reported Segment March 31, 2022 ​ Revenue ​ Revenue (b) ​ Revenue ​ EBITDA (c) Southern ​ $ 385,636 ​ $ (39,570) ​ $ 346,066 ​ $ 101,124 Western ​ 376,538 ​ (42,879) ​ 333,659 ​ 100,000 Central ​ 322,998 ​ (32,936) ​ 290,062 ​ 96,951 Eastern ​ ​ 315,967 ​ ​ (45,165) ​ ​ 270,802 ​ ​ 65,287 Canada ​ 240,215 ​ (25,508) ​ 214,707 ​ 84,844 MidSouth ​ 228,162 ​ (37,203) ​ 190,959 ​ 49,819 Corporate (a) ​ — ​ — ​ — ​ (4,702) ​ ​ $ 1,869,516 ​ $ (223,261) ​ $ 1,646,255 ​ $ 493,323 ____________________ (a) The majority of Corporate expenses are allocated to the six operating segments. Direct acquisition expenses, expenses associated with common shares held in the deferred compensation plan exchanged for other investment options and share-based compensation expenses associated with Progressive Waste share-based grants outstanding at June 1, 2016 that were continued by the Company are not allocated to the six operating segments and comprise the net EBITDA of the Company’s Corporate segment for the periods presented. (b) Intercompany revenues reflect each segment’s total intercompany sales, including intercompany sales within a segment and between segments. Transactions within and between segments are generally made on a basis intended to reflect the market value of the service. (c) For those items included in the determination of segment EBITDA, the accounting policies of the segments are the same as those described in the Company’s most recent Annual Report on Form 10-K. The following tables show changes in goodwill during the three months ended March 31, 2023 and 2022, by reportable segment: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Southern Western Central Eastern Canada MidSouth Total Balance as of December 31, 2022 ​ $ 1,547,894 ​ $ 732,335 ​ $ 1,003,470 ​ $ 1,189,111 ​ $ 1,684,670 ​ $ 744,817 ​ $ 6,902,297 Goodwill acquired ​ ​ — ​ ​ 30,703 ​ ​ 397 ​ 3,440 ​ ​ — ​ ​ 3,249 ​ 37,789 Goodwill acquisition adjustments ​ ​ (647) ​ ​ — ​ ​ — ​ ​ — ​ ​ (289) ​ ​ — ​ ​ (936) Impact of changes in foreign currency ​ — ​ — ​ — ​ — ​ 1,417 ​ — ​ 1,417 Balance as of March 31, 2023 ​ $ 1,547,247 ​ $ 763,038 ​ $ 1,003,867 ​ $ 1,192,551 ​ $ 1,685,798 ​ $ 748,066 ​ $ 6,940,567 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Southern Western Central Eastern Canada MidSouth Total Balance as of December 31, 2021 ​ $ 1,457,437 ​ $ 503,223 ​ $ 931,269 ​ $ 992,578 ​ $ 1,559,512 ​ $ 743,624 ​ $ 6,187,643 Goodwill acquired ​ ​ — ​ ​ — ​ ​ 2,794 ​ 85,866 ​ ​ 123,384 ​ — ​ 212,044 Goodwill acquisition adjustments ​ ​ — ​ ​ 2,652 ​ ​ — ​ ​ — ​ ​ — ​ ​ (95) ​ ​ 2,557 Impact of changes in foreign currency ​ — ​ — ​ — ​ — ​ ​ 25,519 ​ — ​ 25,519 Balance as of March 31, 2022 ​ $ 1,457,437 ​ $ 505,875 ​ $ 934,063 ​ $ 1,078,444 ​ $ 1,708,415 ​ $ 743,529 ​ $ 6,427,763 ​ A reconciliation of the Company’s primary measure of segment profitability (segment EBITDA) to Income before income tax provision in the Condensed Consolidated Statements of Net Income is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ March 31, ​ 2023 2022 Southern segment EBITDA ​ $ 121,914 ​ $ 101,124 Western segment EBITDA ​ ​ 110,689 ​ ​ 100,000 Central segment EBITDA ​ ​ 115,756 ​ ​ 96,951 Eastern segment EBITDA ​ ​ 73,275 ​ ​ 65,287 Canada segment EBITDA ​ ​ 82,984 ​ ​ 84,844 MidSouth segment EBITDA ​ 57,731 ​ 49,819 Subtotal reportable segments ​ 562,349 ​ 498,025 Unallocated corporate overhead ​ ​ (2,454) ​ ​ (4,702) Depreciation ​ ​ (204,059) ​ ​ (179,950) Amortization of intangibles ​ ​ (39,282) ​ ​ (37,635) Impairments and other operating items ​ ​ (1,865) ​ ​ (1,878) Interest expense ​ ​ (68,353) ​ ​ (41,324) Interest income ​ ​ 2,715 ​ ​ 137 Other income (expense), net ​ ​ 3,174 ​ ​ (3,466) Income before income tax provision ​ $ 252,225 ​ $ 229,207 ​	17. SEGMENT REPORTING The Company’s revenues are generated from the collection, transfer, recycling and disposal of non-hazardous solid waste and the treatment, recovery and disposal of non-hazardous E&P waste. No single contract or customer accounted for more than 10% of the Company’s total revenues at the consolidated or reportable segment level during the periods presented. Effective April 1, 2023, the Company modified its organizational structure under new regional operating segments as the result of continued growth in its business. The Company now reports revenue and segment EBITDA based on the following six geographic solid waste operating segments: Southern, Western, Central, Eastern, Canada and MidSouth. A small number of operating locations have been reallocated from the Western segment to the Central segment, the previous Eastern segment has been bifurcated into two smaller geographies now referred to as the Eastern segment and MidSouth segment, and a small number of operating locations have been reallocated from the Southern segment to the MidSouth segment. The Company’s six geographic solid waste operating segments comprise its reportable segments. Each operating segment is responsible for managing several vertically integrated operations, which are comprised of districts. The segment information presented herein reflects the realignment of these regions. The Company’s Chief Operating Decision Maker evaluates operating segment profitability and determines resource allocations based on several factors, of which the primary financial measure is segment EBITDA. The Company defines segment EBITDA as earnings before interest, taxes, depreciation, amortization, impairments and other operating items, other income (expense) and loss on early extinguishment of debt. Segment EBITDA is not a measure of operating income, operating performance or liquidity under GAAP and may not be comparable to similarly titled measures reported by other companies. The Company’s management uses segment EBITDA in the evaluation of segment operating performance as it is a profit measure that is generally within the control of the operating segments. A reconciliation of segment EBITDA to Income before income tax provision is included at the end of this Note 17. Summarized financial information concerning the Company’s reportable segments for the years ended December 31, 2022, 2021 and 2020, is shown in the following tables: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended ​ ​ ​ ​ Intercompany ​ Reported ​ Segment ​ Depreciation and ​ Capital ​ ​ ​ December 31, 2022 Revenue Revenue (b) Revenue EBITDA (c) Amortization Expenditures Total Assets (e) Southern ​ $ 1,670,864 ​ $ (176,425) ​ $ 1,494,439 ​ $ 466,519 ​ $ 175,614 ​ $ 151,093 ​ $ 3,410,888 Western ​ 1,605,574 ​ (177,543) ​ 1,428,031 ​ 424,935 ​ 155,882 ​ 232,714 ​ 3,239,679 Central ​ 1,447,703 ​ (159,355) ​ 1,288,348 ​ 446,315 ​ 156,895 ​ 181,065 ​ 2,803,853 Eastern ​ ​ 1,445,193 ​ ​ (211,498) ​ ​ 1,233,695 ​ ​ 281,522 ​ ​ 190,480 ​ ​ 138,028 ​ ​ 2,752,436 Canada ​ 1,047,672 ​ (107,048) ​ 940,624 ​ 349,403 ​ 118,388 ​ 70,051 ​ 2,773,882 MidSouth ​ 992,922 ​ (166,200) ​ 826,722 ​ 235,705 ​ 112,866 ​ 133,849 ​ 1,727,323 Corporate (a), (d) ​ — ​ — ​ — ​ (25,019) ​ 8,835 ​ 5,877 ​ 426,542 ​ ​ $ 8,209,928 ​ $ (998,069) ​ $ 7,211,859 ​ $ 2,179,380 ​ $ 918,960 ​ $ 912,677 ​ $ 17,134,603 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended ​ ​ ​ ​ Intercompany ​ Reported ​ Segment ​ Depreciation and ​ Capital ​ ​ ​ December 31, 2021 Revenue Revenue (b) Revenue EBITDA (c) Amortization Expenditures Total Assets (e) Southern ​ $ 1,493,588 ​ $ (172,526) ​ $ 1,321,062 ​ $ 369,221 ​ $ 173,235 ​ $ 139,258 ​ $ 3,154,940 Western ​ 1,383,124 ​ (154,498) ​ 1,228,626 ​ 386,513 ​ 126,192 ​ 147,556 ​ 2,168,804 Central ​ 1,243,666 ​ (142,261) ​ 1,101,405 ​ 379,644 ​ 138,683 ​ 149,360 ​ 2,429,811 Eastern ​ 1,111,546 ​ ​ (155,836) ​ ​ 955,710 ​ ​ 245,091 ​ ​ 156,499 ​ ​ 90,212 ​ ​ 2,314,663 Canada ​ 965,705 ​ (108,982) ​ 856,723 ​ 339,859 ​ 111,458 ​ 68,183 ​ 2,513,608 MidSouth ​ 832,386 ​ (144,551) ​ ​ 687,835 ​ ​ 184,218 ​ 97,564 ​ 101,098 ​ 1,690,234 Corporate (a), (d) ​ — ​ — ​ — ​ (19,596) ​ 9,378 ​ 48,648 ​ 427,864 ​ ​ $ 7,030,015 ​ $ (878,654) ​ $ 6,151,361 ​ $ 1,884,950 ​ $ 813,009 ​ $ 744,315 ​ $ 14,699,924 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended ​ ​ ​ ​ Intercompany ​ Reported ​ Segment ​ Depreciation and ​ Capital ​ ​ ​ December 31, 2020 Revenue Revenue (b) Revenue EBITDA (c) Amortization Expenditures Total Assets (e) Southern ​ $ 1,419,987 ​ $ (169,817) ​ $ 1,250,170 ​ $ 343,181 ​ $ 173,885 ​ $ 125,972 ​ $ 3,193,211 Western ​ 1,244,745 ​ (141,993) ​ 1,102,752 ​ 346,585 ​ 111,515 ​ 126,370 ​ 1,770,403 Central ​ 1,058,909 ​ (127,885) ​ 931,024 ​ 332,321 ​ 117,499 ​ 109,013 ​ 2,256,992 Eastern ​ 969,011 ​ ​ (142,927) ​ ​ 826,084 ​ ​ 196,068 ​ ​ 143,744 ​ ​ 111,912 ​ ​ 1,908,333 Canada ​ 805,757 ​ (95,297) ​ 710,460 ​ 256,119 ​ 103,334 ​ 109,886 ​ 2,544,379 MidSouth ​ 761,978 ​ (136,478) ​ ​ 625,500 ​ ​ 172,559 ​ 94,172 ​ 75,661 ​ 1,428,929 Corporate (a), (d) ​ — ​ — ​ — ​ (15,283) ​ 8,255 ​ 5,747 ​ 890,117 ​ ​ $ 6,260,387 ​ $ (814,397) ​ $ 5,445,990 ​ $ 1,631,550 ​ $ 752,404 ​ $ 664,561 ​ $ 13,992,364 (a) The majority of Corporate expenses are allocated to the six operating segments. Direct acquisition expenses, expenses associated with common shares held in the deferred compensation plan exchanged for other investment options and share-based compensation expenses associated with Progressive Waste share-based grants outstanding at June 1, 2016 that were continued by the Company are not allocated to the six operating segments and comprise the net EBITDA of the Company’s Corporate segment for the periods presented. (b) Intercompany revenues reflect each segment’s total intercompany sales, including intercompany sales within a segment and between segments. Transactions within and between segments are generally made on a basis intended to reflect the market value of the service. (c) For those items included in the determination of segment EBITDA, the accounting policies of the segments are the same as those described in Note 3. (d) Corporate assets include cash, debt issuance costs, equity investments, operating lease right-of-use assets and corporate facility leasehold improvements and equipment. (e) Goodwill is included within total assets for each of the Company’s six operating segments. The following table shows changes in goodwill during the years ended December 31, 2021 and 2022, by reportable segment: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Southern Western Central Eastern Canada MidSouth Total Balance as of December 31, 2020 ​ $ 1,532,215 ​ $ 442,862 ​ $ 824,204 ​ $ 1,374,577 ​ $ 1,552,792 ​ $ — ​ $ 5,726,650 Goodwill transferred (a) ​ ​ (77,430) ​ ​ (36,486) ​ ​ 39,037 ​ ​ (557,353) ​ ​ — ​ ​ 632,232 ​ ​ — Goodwill acquired ​ 2,976 ​ 96,847 ​ 68,028 ​ 175,354 ​ — ​ 111,392 ​ 454,597 Goodwill acquisition adjustments ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ (2) ​ ​ — ​ ​ (2) Goodwill divested ​ ​ (324) ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ (324) Impact of changes in foreign currency ​ — ​ — ​ — ​ — ​ 6,722 ​ — ​ 6,722 Balance as of December 31, 2021 ​ ​ 1,457,437 ​ ​ 503,223 ​ ​ 931,269 ​ ​ 992,578 ​ ​ 1,559,512 ​ ​ 743,624 ​ ​ 6,187,643 Goodwill acquired ​ ​ 90,457 ​ ​ 229,112 ​ ​ 72,201 ​ 196,533 ​ ​ 235,095 ​ ​ 1,193 ​ 824,591 Impact of changes in foreign currency ​ — ​ — ​ — ​ — ​ (109,937) ​ — ​ (109,937) Balance as of December 31, 2022 ​ $ 1,547,894 ​ $ 732,335 ​ $ 1,003,470 ​ $ 1,189,111 ​ $ 1,684,670 ​ $ 744,817 ​ $ 6,902,297 (a) Effective April 1, 2023, the Company completed an evaluation of its organizational structure and, as a result of continued growth in the business, modified its organizational structure and changed its five geographic operating segments (Southern, Western, Central, Eastern and Canada) to six geographic operating segments (Southern, Western, Central, Eastern, Canada and MidSouth). Additionally, the Company realigned certain of the Company’s districts between operating segments. This realignment resulted in the reallocation of goodwill among its segments, which is reflected in the “Goodwill transferred” line item. Property and equipment, net relating to operations in the United States and Canada are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2022 2021 United States ​ $ 6,201,011 ​ $ 5,075,184 Canada ​ 749,904 ​ 646,765 Total ​ $ 6,950,915 ​ $ 5,721,949 ​ A reconciliation of the Company’s primary measure of segment profitability (segment EBITDA) to Income before income tax provision in the Consolidated Statements of Net Income is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years ended December 31, ​ 2022 2021 2020 Southern segment EBITDA ​ $ 466,519 ​ $ 369,221 ​ $ 343,181 Western segment EBITDA ​ 424,935 ​ 386,513 ​ 346,585 Central segment EBITDA ​ 446,315 ​ 379,644 ​ 332,321 Eastern segment EBITDA ​ ​ 281,522 ​ ​ 245,091 ​ ​ 196,068 Canada segment EBITDA ​ 349,403 ​ 339,859 ​ 256,119 MidSouth segment EBITDA ​ 235,705 ​ 184,218 ​ 172,559 Subtotal reportable segments ​ 2,204,399 ​ 1,904,546 ​ 1,646,833 Unallocated corporate overhead ​ (25,019) ​ (19,596) ​ (15,283) Depreciation ​ (763,285) ​ (673,730) ​ (621,102) Amortization of intangibles ​ (155,675) ​ (139,279) ​ (131,302) Impairments and other operating items ​ (18,230) ​ (32,316) ​ (466,718) Interest expense ​ (202,331) ​ (162,796) ​ (162,375) Interest income ​ 5,950 ​ 2,916 ​ 5,253 Other income (expense), net ​ 3,154 ​ 6,285 ​ (1,392) Loss on early extinguishment of debt ​ ​ — ​ ​ (115,288) ​ ​ — Income before income tax provision ​ $ 1,048,963 ​ $ 770,742 ​ $ 253,914 ​

Net Income Per Share Informat_4

Net Income Per Share Information	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Net Income Per Share Information [Abstract]
Net Income Per Share Information	13. The following table sets forth the calculation of the numerator and denominator used in the computation of basic and diluted net income per common share attributable to the Company’s shareholders for the three months ended March 31, 2023 and 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ ​ March 31, ​ ​ 2023 2022 Numerator: ​ ​ ​ ​ ​ ​ ​ Net income attributable to Waste Connections for basic and diluted earnings per share ​ $ 197,813 ​ $ 180,324 ​ Denominator: ​ ​ ​ ​ ​ Basic shares outstanding ​ ​ 257,372,942 ​ ​ 258,946,933 ​ Dilutive effect of equity-based awards ​ ​ 616,029 ​ ​ 614,050 ​ Diluted shares outstanding ​ 257,988,971 ​ 259,560,983 ​ ​	18. NET INCOME PER SHARE INFORMATION The following table sets forth the calculation of the numerator and denominator used in the computation of basic and diluted net income per common share attributable to the Company’s shareholders for the years ended December 31, 2022, 2021 and 2020: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ 2022 2021 2020 Numerator: ​ ​ ​ ​ ​ ​ ​ ​ ​ Net income attributable to Waste Connections for basic and diluted earnings per share ​ $ 835,662 ​ $ 618,047 ​ $ 204,677 Denominator: ​ ​ ​ ​ ​ ​ Basic shares outstanding ​ 257,383,578 ​ 261,166,723 ​ 263,189,699 Dilutive effect of equity-based awards ​ 655,223 ​ 561,747 ​ 497,840 Diluted shares outstanding ​ 258,038,801 ​ 261,728,470 ​ 263,687,539 ​

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2022
Employee Benefit Plans [Abstract]
Employee Benefit Plans	19. EMPLOYEE BENEFIT PLANS Retirement Savings Plans: Certain of Waste Connections’ subsidiaries also have voluntary savings and investment plans in the U.S. (the “401(k) Plans”). The 401(k) Plans are available to all eligible U.S. employees of Waste Connections and its subsidiaries. Waste Connections and its subsidiaries make matching contributions under the 401(k) Plans of 100% of every dollar of a participating employee’s pre-tax contributions until the employee’s contributions equal 5% of the employee’s eligible compensation, subject to certain limitations imposed by the U.S. Internal Revenue Code. The Company’s matching contributions under the 401(k) Plans were suspended from June 1, 2020 to December 31, 2020. The Company reinstated its matching contributions effective January 1, 2021. Total employer expenses, including employer matching contributions, for the DPSP and 401(k) Plans were $37,165, $31,834 and $16,350, respectively, during the years ended December 31, 2022, 2021 and 2020. These amounts include matching contributions Waste Connections made under the Deferred Compensation Plan, described below. Multiemployer Pension Plans: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Expiration ​ ​ EIN/Pension Plan ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Date of ​ ​ Number/ ​ Pension Protection Act ​ FIP/RP ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Collective ​ ​ Registration ​ Zone Status (a) ​ Status ​ Company Contributions (d) ​ Bargaining Plan Name Number 2022 2021 (b),(c) 2022 2021 2020 Agreement Western Conference of Teamsters Pension Trust 91-6145047 - 001 Green Green Not applicable ​ $ 5,803 ​ $ 4,963 ​ $ 4,841 4/30/2023 to 6/30/2027 Local 731, I.B. of T., Pension Fund 36-6513567 - 001 Green for the plan year beginning 10/1/2021 Green for the plan year beginning 10/1/2021 Not applicable ​ ​ 4,484 ​ ​ 4,504 ​ ​ 4,628 9/30/2023 Suburban Teamsters of Northern Illinois Pension Fund 36-6155778 - 001 Green Green Not applicable ​ 2,516 ​ 2,300 ​ 2,080 2/29/2024 Teamsters Local 301 Pension Fund 36-6492992 - 001 Green Green Not applicable ​ 1,310 ​ 841 ​ 673 9/30/2023 Midwest Operating Engineers Pension Plan 36-6140097 - 001 Green for the plan year beginning 4/1/2022 Green for the plan year beginning 4/1/2021 Not applicable ​ 542 ​ 424 ​ 316 10/31/2025 Automobile Mechanics’ Local No. 701 Union and Industry Pension Fund 36-6042061 - 001 Green Green Not applicable ​ 470 ​ 439 ​ 457 12/31/2022 Local 813 Pension Trust Fund 13-1975659 - 001 Critical Critical for the plan year beginning 1/1/2021 Implemented ​ 429 ​ 258 ​ 183 11/30/2027 Locals 302 & 612 of the IOUE - Employers Construction Industry Retirement Plan 91-6028571 - 001 Green Green Not applicable ​ 338 ​ 313 ​ 298 11/16/2022 IAM National Pension Fund ​ 51-6031295 - 002 ​ Critical ​ Critical ​ Implemented ​ ​ 342 ​ ​ 299 ​ ​ 310 ​ 12/31/2022 International Union of Operating Engineers Pension Trust 85512-1 Green as of 4/30/2020 Green as of 4/30/2020 Not applicable ​ 281 ​ 295 ​ 279 3/31/2024 Multi-Sector Pension Plan 1085653 Critical as of 1/1/2021 Critical as of 1/1/2021 Not applicable ​ 249 ​ 265 ​ 196 12/31/2023 Recycling and General Industrial Union Local 108 Pension Fund ​ 13-6366378 - 001 ​ Green ​ Green ​ Not applicable ​ ​ 230 ​ ​ 217 ​ ​ 269 ​ 2/28/2027 Nurses and Local 813 IBT Retirement Plan ​ 13-3628926 - 001 ​ Green ​ Green ​ Not applicable ​ ​ 97 ​ ​ 58 ​ ​ 52 ​ 11/30/2027 Contributions to other multiemployer plans ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 65 ​ ​ 75 ​ ​ 10 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ $ 17,156 ​ $ 15,251 ​ $ 14,592 ​ ​ ​ (a) Unless otherwise noted in the table above, the most recent Pension Protection Act zone status available in 2022 and 2021 is for the plans’ years ended December 31, 2021 and 2020, respectively. (b) The “FIP/RP Status” column indicates plans for which a Funding Improvement Plan (“FIP”) or a Rehabilitation Plan (“RP”) has been implemented. (c) A multiemployer defined benefit pension plan that has been certified as endangered, seriously endangered or critical may begin to levy a statutory surcharge on contribution rates. Once authorized, the surcharge is at the rate of 5% for the first 12 months and 10% for any periods thereafter, until certain conditions are met. The Company was not required to pay a surcharge to these plans during the years ended December 31, 2022 and 2021. (d) Of the Multiemployer Pension Plans considered to be individually significant, the Company was listed in the Form 5500 as providing more than 5% of the total contributions for the following: 1) Local No. 731, I.B. of T., Pension Fund for plan years ending September 30, 2021, 2020 and 2019; 2) Teamsters Local 301 Pension Fund for plan years ending December 31, 2021, 2020 and 2019; 3) Suburban Teamsters of Northern Illinois Pension Plan for the plan years ending December 31, 2021 and 2020; and 4) Recycling and General Industrial Union Local 108 Pension Fund for the plan years ending December 31, 2021, 2020 and 2019. The status is based on information that the Company received from the pension plans and is certified by the pension plans’ actuary. Plans with “green” status are at least 80% funded. Plans with “yellow” status are less than 80% funded. Plans with “critical” status are less than 65% funded. Under current law regarding multiemployer benefit plans, a plan’s termination, the Company’s voluntary withdrawal, or the withdrawal of all contributing employers from any under-funded multiemployer pension plan would require the Company to make payments to the plan for its proportionate share of the multiemployer plan’s unfunded vested liabilities. The Company could have adjustments to its estimates for these matters in the near term that could have a material effect on its consolidated financial condition, results of operations or cash flows. Deferred Compensation Plan:

Subsequent Events_2

Subsequent Events	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Subsequent Events [Abstract]
Subsequent Events	18 . SUBSEQUENT EVENTS (UNAUDITED) Effective April 1, 2023, the Company modified its organizational structure under new regional operating segments as the result of continued growth in the business. Beginning in the second quarter of 2023, the Company will report revenue and segment EBITDA based on the following six geographic solid waste operating segments: Southern, Eastern, MidSouth, Western, Central and Canada. On April 24, 2023, the Company announced the departure of Worthing F. Jackman from his role as President and Chief Executive Officer of the Company, effective April 23, 2023. For purposes of Mr. Jackman’s letter agreement dated July 25, 2019, as amended, and the related Separation Benefits Plan as amended and restated July 26, 2022, Mr. Jackman’s departure qualified as a termination without cause. On April 24, 2023, the Company also announced that Ronald J. Mittelstaedt succeeded Mr. Jackman as the Company’s President and Chief Executive Officer. Mr. Mittelstaedt is the Company’s founder and served as the Company’s Chief Executive Officer from 1997 until July 2019, when he transitioned to the position of Executive Chairman. On April 26, 2023, the Company announced that its Board of Directors approved a regular quarterly cash dividend of $0.255 per Company common share. The dividend will be paid on May 24, 2023, to shareholders of record on the close of business on May 10, 2023.	20. SUBSEQUENT EVENT (UNAUDITED) On February 15, 2023, the Company announced that its Board of Directors approved a regular quarterly cash dividend of $0.255 per Company common share. The dividend will be paid on March 15, 2023, to shareholders of record on the close of business on March 1, 2023.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Reporting Currency	Reporting Currency The functional currency of the Company, as the parent corporate entity, and its operating subsidiaries in the United States, is the U.S. dollar. The functional currency of the Company’s Canadian operations is the Canadian dollar. The reporting currency of the Company is the U.S. dollar. The Company’s consolidated Canadian dollar financial position is translated to U.S. dollars by applying the foreign currency exchange rate in effect at the consolidated balance sheet date. The Company’s consolidated Canadian dollar results of operations and cash flows are translated to U.S. dollars by applying the average foreign currency exchange rate in effect during the reporting period. The resulting translation adjustments are included in other comprehensive income or loss. Gains and losses from foreign currency transactions are included in earnings for the period.
Cash Equivalents	Cash Equivalents The Company considers all highly liquid investments with a maturity of three months or less at purchase to be cash equivalents. As of December 31, 2022 and 2021, cash equivalents consisted of demand money market accounts.
Concentrations of Credit Risk	Concentrations of Credit Risk Financial instruments that potentially subject the Company to concentrations of credit risk consist primarily of cash and equivalents, restricted cash, restricted investments and accounts receivable. The Company maintains cash and equivalents with banks that at times exceed applicable insurance limits. The Company reduces its exposure to credit risk by maintaining such deposits with high quality financial institutions. The Company’s restricted cash and restricted investments are invested primarily in money market accounts, bank time deposits, U.S. government and agency securities and Canadian bankers’ acceptance notes. The Company has not experienced any losses related to its cash and equivalents, restricted cash or restricted investment accounts. The Company generally does not require collateral on its trade receivables. Credit risk on accounts receivable is minimized as a result of the large and diverse nature of the Company’s customer base. The Company maintains allowances for credit losses based on the expected collectability of accounts receivable.
Revenue Recognition	Revenue Recognition and Accounts Receivable The Company’s operations primarily consist of providing non-hazardous waste collection, transfer, disposal and recycling services, E&P services, and intermodal services. The following table disaggregates the Company’s revenues by service line for the periods indicated: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ 2022 2021 2020 Commercial $ 2,176,295 ​ $ 1,813,426 $ 1,610,313 Residential ​ ​ 1,891,108 ​ ​ 1,673,819 ​ ​ 1,528,217 Industrial and construction roll off ​ ​ 1,183,624 ​ ​ 954,181 ​ ​ 833,148 Total collection ​ ​ 5,251,027 ​ ​ 4,441,426 ​ ​ 3,971,678 Landfill ​ ​ 1,328,942 ​ ​ 1,233,499 ​ ​ 1,146,732 Transfer ​ ​ 1,026,050 ​ ​ 859,113 ​ ​ 777,754 Recycling ​ ​ 204,876 ​ ​ 205,076 ​ ​ 86,389 E&P ​ ​ 210,562 ​ ​ 138,707 ​ ​ 159,438 Intermodal and other ​ ​ 188,471 ​ ​ 152,194 ​ ​ 118,396 Intercompany ​ ​ (998,069) ​ ​ (878,654) ​ ​ (814,397) Total $ 7,211,859 ​ $ 6,151,361 $ 5,445,990 ​ The factors that impact the timing and amount of revenue recognized for each service line may vary based on the nature of the service performed. Generally, the Company recognizes revenue at the time it performs a service. In the event that the Company bills for services in advance of performance, it recognizes deferred revenue for the amount billed and subsequently recognizes revenue at the time the service is provided. See Note 17 for additional information regarding revenue by reportable segment. Revenue by Service Line Solid Waste Collection The Company’s solid waste collection business involves the collection of waste from residential, commercial and industrial customers for transport to transfer stations, or directly to landfills or recycling centers. Solid waste collection services include both recurring and temporary customer relationships. The services are performed under service agreements, municipal contracts or franchise agreements with governmental entities. Existing franchise agreements and most of the existing municipal contracts give the Company the exclusive right to provide specified waste services in the specified territory during the contract term. These exclusive arrangements are awarded, at least initially, on a competitive bid basis and subsequently on a bid or negotiated basis. The standard customer service agreements generally range from one In general, residential collection fees are billed monthly or quarterly in advance. Substantially all of the deferred revenue recorded as of September 30, 2022 was recognized as revenue during the three months ended December 31, 2022 when the service was performed. Commercial customers are typically billed on a monthly basis based on the nature of the services provided during the period. Revenue recognized under these agreements is variable in nature based on the number of residential homes or businesses serviced during the period, the frequency of collection and the volume of waste collected. In addition, certain contracts have annual price escalation clauses that are tied to changes in an underlying base index such as a consumer price index which are unknown at contract inception. Solid waste collection revenue from sources other than customer contracts primarily relates to lease revenue associated with compactors. Revenue from these leasing arrangements was not material and represented an insignificant amount of total revenue for each of the reported periods. Landfill and Transfer Station Revenue at landfills is primarily generated by charging tipping fees on a per ton and/or per yard basis to third parties based on the volume disposed and the nature of the waste. In general, fees are variable in nature and revenue is recognized at the time the waste is disposed at the facility. Revenue at transfer stations is primarily generated by charging tipping or disposal fees on a per ton and/or per yard basis. The fees charged to third parties are based primarily on the market, type and volume or weight of the waste accepted, the distance to the disposal facility and the cost of disposal. In general, fees are billed and revenue is recognized at the time the service is performed. Revenue recognized under these agreements is variable in nature based on the volume of waste accepted at the transfer facility. Many of the Company’s landfill and transfer station customers have entered into one Solid Waste Recycling Solid waste recycling revenues result from the sale of recycled commodities, which are generated by offering residential, commercial, industrial and municipal customers recycling services for a variety of recyclable materials, including compost, cardboard, mixed paper, plastic containers, glass bottles and ferrous and aluminum metals. The Company owns and operates recycling operations and markets collected recyclable materials to third parties for processing before resale. In some instances, the Company utilizes a third party to market recycled materials. In certain instances, the Company issues recycling rebates to municipal or commercial customers, which can be based on the price it receives upon the sale of recycled commodities, a fixed contractual rate or other measures. The Company also receives rebates when it disposes of recycled commodities at third-party facilities. The fees received are based primarily on the market, type and volume or weight of the materials sold. In general, fees are billed and revenue is recognized at the time title is transferred. Revenue recognized under these agreements is variable in nature based on the volume of materials sold. In addition, the amount of revenue recognized is based on commodity prices at the time of sale, which are unknown at contract inception. E&P Waste Treatment, Recovery and Disposal E&P waste revenue is primarily generated through the treatment, recovery and disposal of non-hazardous exploration and production waste from vertical and horizontal drilling, hydraulic fracturing, production and clean-up activity, as well as other services. Revenue recognized under these agreements is variable in nature based on the volume of waste accepted or processed during the period. Intermodal and Other Intermodal revenue is primarily generated through providing intermodal services for the rail haul movement of cargo and solid waste containers in the Pacific Northwest through a network of intermodal facilities. The fees received for intermodal services are based on negotiated rates and vary depending on volume commitments by the shipper and destination. In general, fees are billed and revenue is recognized upon delivery. Other revenues consist primarily of the sale of methane gas and renewable energy credits generated from the Company’s MSW landfills. Revenue Recognition Service obligations of a long-term nature, such as solid waste collection service contracts, are satisfied over time, and revenue is recognized based on the value provided to the customer during the period. In many of our markets, solid waste collection service contracts exist as exclusive franchise agreements or municipal contracts. The amount billed to the customer is based on variable elements such as the number of residential homes or businesses for which collection services are provided, the volume of waste collected, transported and disposed, and the nature of the waste accepted. Such contracts are generally within the Company’s collection, recycling and other lines of business and have a weighted average remaining contract life of approximately four years, excluding certain exclusive and perpetual agreements, such as governmental certificates . Additionally, certain elements of long-term customer contracts are unknown upon entering into the contract, including the amount that will be billed in accordance with annual price escalation clauses, fuel recovery fee programs and commodity prices. The amount to be billed is often tied to changes in an underlying base index such as a consumer price index or a fuel or commodity index, and revenue is recognized once the index is established for the period.
Accounts Receivable	Accounts Receivable Accounts receivable are recorded when billed or accrued and represent claims against third parties that will be settled in cash. The carrying value of the Company’s receivables, net of the allowance for credit losses, represents their estimated net realizable value. The allowance for credit losses is based on management’s assessment of the collectability of assets pooled together with similar risk characteristics. The Company monitors the collectability of its trade receivables as one overall pool due to all trade receivables having similar risk characteristics. The Company estimates its allowance for credit losses based on historical collection trends, the age of outstanding receivables, geographical location of the customer, existing economic conditions and reasonable forecasts. If events or changes in circumstances indicate that specific receivable balances may be impaired, further consideration is given to the collectability of those balances and the allowance is adjusted accordingly. Past-due receivable balances are written off when the Company’s internal collection efforts have been unsuccessful in collecting the amount due. The following is a rollforward of the Company’s allowance for credit losses for the periods indicated: ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ ​ 2022 2021 Beginning balance ​ $ 18,480 ​ $ 19,380 Current period provision for expected credit losses ​ ​ 17,353 ​ ​ 9,719 Write-offs charged against the allowance ​ ​ (18,273) ​ ​ (15,545) Recoveries collected ​ ​ 5,473 ​ ​ 4,918 Impact of changes in foreign currency ​ ​ (94) ​ ​ 8 Ending balance ​ $ 22,939 ​ $ 18,480
Contract Acquisition Costs	Contract Acquisition Costs The incremental direct costs of obtaining a contract, which consist of sales incentives, are recognized as Other assets in the Company’s Consolidated Balance Sheet, and are amortized to Selling, general and administrative expense over the estimated life of the relevant customer relationship, which ranges from one Company would have recognized is one year or less. The Company had $23,818 and $18,954 of deferred sales incentives at December 31, 2022 and 2021, respectively. During the years ended December 31, 2022, 2021 and 2020, the Company recorded a total of $22,675, $23,671 and $17,138, respectively, of sales incentive amortization expense for deferred sales incentives and sales incentive expense for contracts with original terms of less than one year.
Property and Equipment	Property and Equipment Property and equipment are stated at cost. Improvements or betterments, not considered to be maintenance and repair, which add new functionality or significantly extend the life of an asset are capitalized. Third-party expenditures related to pending development projects, such as legal and engineering expenses, are capitalized. Expenditures for maintenance and repair costs, including planned major maintenance activities, are charged to expense as incurred. The cost of assets retired or otherwise disposed of and the related accumulated depreciation are eliminated from the accounts in the year of disposal. Gains and losses resulting from disposals of property and equipment are recognized in the period in which the property and equipment is disposed. Depreciation is computed using the straight-line method over the estimated useful lives of the assets or the lease term, whichever is shorter. The estimated useful lives are as follows: ​ ​ ​ ​ Buildings 10 Leasehold and land improvements 3 Machinery and equipment 3 Rolling stock 3 Containers 3
Landfill Accounting	Landfill Accounting The Company utilizes the life cycle method of accounting for landfill costs. This method applies the costs to be capitalized associated with acquiring, developing, closing and monitoring the landfills over the associated consumption of landfill capacity. The Company utilizes the units of consumption method to amortize landfill development costs over the estimated remaining capacity of a landfill. Under this method, the Company includes future estimated construction costs using current dollars, as well as costs incurred to date, in the amortization base. When certain criteria are met, the Company includes expansion airspace, which has not been permitted, in the calculation of the total remaining capacity of the landfill. - Landfill development costs - Final capping, closure and post-closure obligations a landfill facility ceases to accept waste and closes. Accruals for final capping, closure and post-closure monitoring and maintenance requirements in the U.S. consider site inspection, groundwater monitoring, leachate management, methane gas control and recovery, and operating and maintenance costs to be incurred during the period after the facility closes. Certain of these environmental costs, principally capping and methane gas control costs, are also incurred during the operating life of the site in accordance with the landfill operation requirements of Subtitle D and the air emissions standards. Daily maintenance activities, which include many of these costs, are expensed as incurred during the operating life of the landfill. Daily maintenance activities include leachate disposal; surface water, groundwater, and methane gas monitoring and maintenance; other pollution control activities; mowing and fertilizing the landfill final cap; fence and road maintenance; and third-party inspection and reporting costs. Site specific final capping, closure and post-closure engineering cost estimates are prepared annually for landfills owned or landfills operated under life-of-site agreements by the Company. The net present value of landfill final capping, closure and post-closure liabilities are calculated by estimating the total obligation in current dollars, inflating the obligation based upon the expected date of the expenditure and discounting the inflated total to its present value using a credit adjusted risk-free rate. Any changes in expectations that result in an upward revision to the estimated undiscounted cash flows are treated as a new liability and are inflated and discounted at rates reflecting market conditions. Any changes in expectations that result in a downward revision (or no revision) to the estimated undiscounted cash flows result in a liability that is inflated and discounted at rates reflecting the market conditions at the time the cash flows were originally estimated. This policy results in the Company’s final capping, closure and post-closure liabilities being recorded in “layers.” The Company’s discount rate assumption for purposes of computing layers for final capping, closure and post-closure liabilities is based on its long-term credit adjusted risk-free rate. The Company’s discount rate assumption for purposes of computing 2022 and 2021 “layers” for final capping, closure and post-closure obligations ranged from 3.25% to 5.50% for 2022 and was 3.25% for 2021. The Company’s long-term inflation rate assumption ranged from 2.25% to 2.75% for 2022 and was 2.25% for 2021. In accordance with the accounting guidance on asset retirement obligations, the final capping, closure and post-closure liability is recorded on the balance sheet along with an offsetting addition to site costs which is amortized to depletion expense on a units-of-consumption basis as remaining landfill airspace is consumed. The impact of changes determined to be changes in estimates, based on an annual update, is accounted for on a prospective basis. Depletion expense resulting from final capping, closure and post-closure obligations recorded as a component of landfill site costs will generally be less during the early portion of a landfill’s operating life and increase thereafter. Owned landfills and landfills operated under life-of-site agreements have estimated remaining lives, based on remaining permitted capacity, probable expansion capacity and projected annual disposal volumes, that range from approximately 1 to 329 years, with approximately 90% of the projected annual disposal volume from landfills with remaining lives of less than 70 years. The costs for final capping, closure and post-closure obligations at landfills the Company owns or operates under life-of-site agreements are generally estimated based on interpretations of current requirements and proposed or anticipated regulatory changes. The following is a reconciliation of the Company’s final capping, closure and post-closure liability balance from December 31, 2020 to December 31, 2022: ​ ​ ​ ​ ​ Final capping, closure and post-closure liability at December 31, 2020 $ 301,896 Liability adjustments ​ (1,081) Accretion expense associated with landfill obligations ​ 14,333 Closure payments ​ (21,040) Assumption of closure liabilities from acquisitions ​ 11,380 Disposition of closure liabilities from divested operations ​ ​ (3,566) Foreign currency translation adjustment ​ ​ 615 Final capping, closure and post-closure liability at December 31, 2021 ​ 302,537 Liability adjustments ​ 39,321 Accretion expense associated with landfill obligations ​ 16,068 Closure payments ​ (18,834) Assumption of closure liabilities from acquisitions ​ ​ 8,575 Disposition of closure liabilities from divested operations ​ ​ (916) Foreign currency translation adjustment ​ (2,145) Final capping, closure and post-closure liability at December 31, 2022 ​ $ 344,606 ​ Liability adjustments of $39,321 and $1,081 for the years ended December 31, 2022 and 2021, respectively, represent non-cash changes to final capping, closure and post-closure liabilities and are recorded on the Consolidated Balance Sheets along with an offsetting addition to site costs, which is amortized to depletion expense as the remaining landfill airspace is consumed. The final capping, closure and post-closure liability is included in Other long-term liabilities in the Consolidated Balance Sheets. The Company performs its annual review of its cost and capacity estimates in the first quarter of each year. - Disposal capacity 1) whether the land where the expansion is being sought is contiguous to the current disposal site, and the Company either owns the expansion property or has rights to it under an option, purchase, operating or other similar agreement; 2) whether total development costs, final capping costs, and closure/post-closure costs have been determined; 3) whether internal personnel have performed a financial analysis of the proposed expansion site and have determined that it has a positive financial and operational impact; 4) whether internal personnel or external consultants are actively working to obtain the necessary approvals to obtain the landfill expansion permit; and 5) whether the Company considers it probable that the Company will achieve the expansion (for a pursued expansion to be considered probable, there must be no significant known technical, legal, community, business, or political restrictions or similar issues existing that the Company believes are more likely than not to impair the success of the expansion). It is possible that the Company’s estimates or assumptions could ultimately be significantly different from actual results. In some cases, the Company may be unsuccessful in obtaining an expansion permit or the Company may determine that an expansion permit that the Company previously thought was probable has become unlikely. To the extent that such estimates, or the assumptions used to make those estimates, prove to be significantly different than actual results, or the belief that the Company will receive an expansion permit changes adversely in a significant manner, the costs of the landfill, including the costs incurred in the pursuit of the expansion, may be subject to impairment testing, as described below, and lower profitability may be experienced due to higher amortization rates, higher capping, closure and post-closure rates, and higher expenses or asset impairments related to the removal of previously included expansion airspace. The Company periodically evaluates its landfill sites for potential impairment indicators. The Company’s judgments regarding the existence of impairment indicators are based on regulatory factors, market conditions and operational performance of its landfills. Future events could cause the Company to conclude that impairment indicators exist and that its landfill carrying costs are impaired.
Business Combination Accounting	Business Combination Accounting The Company accounts for business combinations as follows: ● ●
Finite-Lived Intangible Assets	Finite-Lived Intangible Assets The amounts assigned to franchise agreements, contracts, customer lists, permits and other agreements are being amortized over the expected term of the related agreements (ranging from 1
Goodwill and Indefinite-Lived Intangible Assets	Goodwill and Indefinite-Lived Intangible Assets The Company acquired indefinite-lived intangible assets in connection with certain of its acquisitions. The amounts assigned to indefinite-lived intangible assets consist of the value of certain perpetual rights to provide solid waste collection and transportation services in specified territories. The Company measures and recognizes acquired indefinite-lived intangible assets at their estimated acquisition date fair values. Indefinite-lived intangible assets are not amortized. Goodwill represents the excess of: (a) the aggregate of the fair value of consideration transferred, the fair value of any noncontrolling interest in the acquiree (if any) and the acquisition date fair value of the Company’s previously held equity interest in the acquiree (if any), over (b) the fair value of assets acquired and liabilities assumed. Goodwill and intangible assets, deemed to have indefinite lives, are subject to annual impairment tests as described below. Goodwill and indefinite-lived intangible assets are tested for impairment on at least an annual basis in the fourth quarter of the year. In addition, the Company evaluates its reporting units for impairment if events or circumstances change between annual tests indicating a possible impairment. Examples of such events or circumstances include, but are not limited to, the following: ● ● ● ● ● As part of the Company’s goodwill impairment test, the Company estimates the fair value of each of its reporting units using discounted cash flow analyses. The Company’s reporting units consisted of its six geographic solid waste operating segments at December 31, 2022, 2021 and 2020. The Company compares the fair value of each reporting unit with the carrying value of the net assets assigned to each reporting unit. If the fair value of a reporting unit is greater than the carrying value of the net assets, including goodwill, assigned to the reporting unit, then no impairment results. If the fair value is less than its carrying value, an impairment charge is recorded for the amount by which the carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. In testing indefinite-lived intangible assets for impairment, the Company compares the estimated fair value of each indefinite-lived intangible asset to its carrying value. If the fair value of the indefinite-lived intangible asset is less than its carrying value, an impairment charge would be recorded to earnings in the Company’s Consolidated Statements of Net Income. During the Company’s annual impairment analysis of its solid waste operations, the Company determined the fair value of each of its six geographic operating segments at December 31, 2022, 2021 and 2020 and each indefinite-lived intangible asset within those segments using discounted cash flow analyses, which require significant assumptions and estimates about the future operations of each reporting unit and the future discrete cash flows related to each indefinite-lived intangible asset. Significant judgments inherent in these analyses include the determination of appropriate discount rates, the amount and timing of expected future cash flows, growth rates and income tax rates. The cash flows employed in the Company’s 2022 discounted cash flow analyses were based on ten-year financial forecasts, which in turn were based on the 2023 annual budget developed internally by management. These forecasts reflect operating profit margins that were consistent with 2022 results and perpetual revenue growth rates of 4.5%. The Company’s discount rate assumptions are based on an assessment of the market participant rate which approximated 7.9%. In assessing the reasonableness of the Company’s determined fair values of its reporting units, the Company evaluates its results against its current market capitalization. The Company did not record an impairment charge to any of its six geographic operating segments as a result of its annual goodwill impairment tests for the years ended December 31, 2022, 2021 or 2020. During the fourth quarter of 2021, the Company recorded an impairment charge of $2,277, which is included in Impairments and other operating items in the Consolidated Statements of Net Income, on certain indefinite-lived intangible assets at two of its E&P sites in its Southern segment. The Company did not record an impairment charge to any of its six geographic operating segments as a result of its indefinite-lived intangible assets impairment tests for the years ended December 31, 2022 or 2020.
Impairments of Property and Equipment and Finite-Lived Intangible Assets	Impairments of Property and Equipment and Finite-Lived Intangible Assets Property, equipment and finite-lived intangible assets are carried on the Company’s consolidated financial statements based on their cost less accumulated depreciation or amortization. Finite-lived intangible assets consist of long-term franchise agreements, contracts, customer lists, permits and other agreements. The recoverability of these assets is tested whenever events or changes in circumstances indicate that their carrying amount may not be recoverable. Typical indicators that an asset may be impaired include, but are not limited to, the following: ● ● ● ● ● If any of these or other indicators occur, a test of recoverability is performed by comparing the carrying value of the asset or asset group to its undiscounted expected future cash flows. If the carrying value is in excess of the undiscounted expected future cash flows, impairment is measured by comparing the fair value of the asset to its carrying value. Fair value is determined by an internally developed discounted projected cash flow analysis of the asset. Cash flow projections are sometimes based on a group of assets, rather than a single asset. If cash flows cannot be separately and independently identified for a single asset, the Company will determine whether an impairment has occurred for the group of assets for which the projected cash flows can be identified. If the fair value of an asset is determined to be less than the carrying amount of the asset or asset group, an impairment in the amount of the difference is recorded in the period that the impairment indicator occurs. Several impairment indicators are beyond the Company’s control, and whether or not they will occur cannot be predicted with any certainty. Estimating future cash flows requires significant judgment and projections may vary from cash flows eventually realized. There are other considerations for impairments of landfills, as described below. During the year ended December 31, 2022, the Company did not record any significant impairment charges for finite-lived intangible assets or property and equipment. During the year ended December 31, 2021, the Company recorded a $16,379 impairment charge, which is included in Impairments and other operating items in the Consolidated Statements of Net Income, for property and equipment and finite-lived intangible assets at three of its E&P waste sites in its Southern segment. The demand for the Company’s E&P waste services depends on the continued demand for, and production of, oil and natural gas. Crude oil and natural gas prices historically have been volatile. Macroeconomic and geopolitical conditions, including a significant decline in oil prices occurring in 2020 driven by both surplus production and supply, as well as the decrease in demand caused by factors including the COVID-19 pandemic, resulted in decreased levels of oil and natural gas exploration and production activity and a corresponding decrease in demand for the Company’s E&P waste services in 2020. During the year ended December 31, 2020, total E&P waste revenue declined $112,114, compared to the prior year period, on rig count declines of 56% in certain basins. The most impacted basins include the Williston Basin in North Dakota, the Eagle Ford Basin in Texas and the Powder River Basin in Wyoming, all of which have relatively high costs associated with drilling, making them less attractive than other basins, including the Permian Basin in Texas and New Mexico. Additionally, across the industry there was uncertainty regarding future demand for oil and related services, as noted by several energy companies during 2020, many of whom are customers of the Company’s E&P waste services. These energy companies wrote down the values of their oil and gas assets in anticipation of the potential for the decarbonization of their energy product mix given an increased global focus on reducing greenhouse gases and addressing climate change. Such uncertainty regarding global demand had a significant impact on the investment and operating plans of the Company’s E&P waste customers in the basins where the Company operates. The decrease in E&P activity, together with market expectations of a likely slow recovery in oil prices, reduced the expected future period cash flows of the Company’s E&P waste services. Based on these events, the Company concluded that a triggering event occurred which required the Company to perform an impairment test of the property and equipment and intangible assets of its E&P waste services as of June 30, 2020 using July 2020 industry projections for drilling activity by basin as the basis for expectations about future activity. Based upon the results of the impairment test, the Company concluded that the carrying value exceeded the projected undiscounted cash flows of four E&P waste landfills. The next step was to calculate the fair value of these four landfills using an income approach employing a discounted cash flow (“DCF”) model over the lesser of 40 years or the remaining life of each landfill. Additional key assumptions used in the DCF model included a discount rate of 12% applied to the cash flows, annual revenue projections based on E&P waste resulting from projected levels of oil and natural gas E&P activity during the forecast period at each location, gross margins based on estimated operating expense requirements during the forecast period, estimated capital expenditures over the forecast period and income taxes based on the estimated federal and state income tax rates applicable during the cash flow periods, all of which were classified as Level 3 in the fair value hierarchy. For each of the four landfills, the carrying value exceeded the calculated discounted fair value, resulting in the recording of an impairment charge of $417,384 to Impairments and other operating items in the Consolidated Statements of Net Income during the year ended December 31, 2020. The four landfills had $0 of intangible assets at June 30, 2020; therefore, no impairment charge was attributable to intangible assets. The impairment charge reduced the carrying value of property and equipment by $417,384. If the estimated annual cash flows in the DCF model for each asset or asset group tested was changed by 10%, the resulting impairment charge would change by approximately $3,000. The aforementioned impairment charges were partially offset by a $4,145 adjustment, also recorded during the year ended December 31, 2020, to reduce the fair value of a liability-classified contingent consideration arrangement calculated on future earnings and cash flows associated with the acquisition of an E&P business in 2014. There are certain indicators listed above that require significant judgment and understanding of the waste industry when applied to landfill development or expansion projects. A regulator or court may deny or overturn a landfill development or landfill expansion permit application before the development or expansion permit is ultimately granted. Management may periodically divert waste from one landfill to another to conserve remaining permitted landfill airspace. Therefore, certain events could occur in the ordinary course of business and not necessarily be considered indicators of impairment due to the unique nature of the waste industry.
Restricted Cash and Restricted Investments	Restricted Cash and Restricted Investments Restricted cash and restricted investments consist of the following: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2022 ​ December 31, 2021 ​ ​ Restricted ​ Restricted ​ Restricted ​ Restricted ​ Cash Investments Cash Investments Settlement of insurance claims ​ $ 88,360 ​ $ — ​ $ 52,906 ​ $ — Landfill closure and post-closure obligations ​ ​ 6,890 ​ ​ 57,469 ​ ​ 12,609 ​ ​ 56,289 Other financial assurance requirements ​ ​ 7,477 ​ ​ 10,630 ​ ​ 6,659 ​ ​ 2,725 ​ ​ $ 102,727 ​ $ 68,099 ​ $ 72,174 ​ $ 59,014 ​ See Note 12 for further information on restricted cash and restricted investments.
Fair Value of Financial Instruments	Fair Value of Financial Instruments The Company’s financial instruments consist primarily of cash and equivalents, trade receivables, restricted cash and investments, trade payables, debt instruments, contingent consideration obligations and interest rate swaps. As of December 31, 2022 and 2021, the carrying values of cash and equivalents, trade receivables, restricted cash and investments, trade payables and contingent consideration are considered to be representative of their respective fair values. The carrying values of the Company’s debt instruments, excluding certain notes as listed in the table below, approximate their fair values as of December 31, 2022 and 2021, based on current borrowing rates, current remaining average life to maturity and borrower credit quality for similar types of borrowing arrangements, and are classified as Level 2 within the fair value hierarchy. The carrying values and fair values of the Company’s debt instruments where the carrying values do not approximate their fair values as of December 31, 2022 and 2021, are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Carrying Value at ​ Fair Value (a) at ​ ​ December 31, ​ December 31, ​ December 31, ​ December 31, ​ 2022 2021 2022 2021 4.25% Senior Notes due 2028 ​ $ 500,000 ​ $ 500,000 ​ $ 470,850 ​ $ 561,350 3.50% Senior Notes due 2029 ​ $ 500,000 ​ $ 500,000 ​ $ 457,650 ​ $ 539,500 2.60% Senior Notes due 2030 ​ $ 600,000 ​ $ 600,000 ​ $ 510,540 ​ $ 610,440 2.20% Senior Notes due 2032 ​ $ 650,000 ​ $ 650,000 ​ $ 514,540 ​ $ 637,065 3.20% Senior Notes due 2032 ​ $ 500,000 ​ $ — ​ $ 429,000 ​ $ — 4.20% Senior Notes due 2033 ​ $ 750,000 ​ $ — ​ $ 699,450 ​ $ — 3.05% Senior Notes due 2050 ​ $ 500,000 ​ $ 500,000 ​ $ 343,300 ​ $ 496,350 2.95% Senior Notes due 2052 ​ $ 850,000 ​ $ 850,000 ​ $ 561,425 ​ $ 828,580 (a) Senior Notes are classified as Level 2 within the fair value hierarchy. Fair value inputs include third-party calculations of the market interest rate of notes with similar ratings in similar industries over the remaining note terms. For details on the fair value of the Company’s interest rate swaps, restricted cash and investments and contingent consideration, see Note 12.
Derivative Financial Instruments	Derivative Financial Instruments The Company recognizes all derivatives on the balance sheet at fair value. All of the Company’s derivatives have been designated as cash flow hedges; therefore, the gain or loss on the derivatives will be recognized in accumulated other comprehensive income (loss) (“AOCIL”) and reclassified into earnings in the same period during which the hedged transaction affects earnings and is presented in the same income statement line item as the earnings effect of the hedged item. The Company classifies cash inflows and outflows from derivatives within operating activities on the statement of cash flows. One of the Company’s objectives for utilizing derivative instruments is to reduce its exposure to fluctuations in cash flows due to changes in the variable interest rates of certain borrowings under the Credit Agreement (defined below). The Company’s strategy to achieve that objective involves entering into interest rate swaps. The interest rate swaps outstanding at December 31, 2022 were specifically designated to the Credit Agreement and accounted for as cash flow hedges. At December 31, 2022, the Company’s derivative instruments included five interest rate swap agreements as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fixed Variable ​ ​ ​ ​ Notional ​ Interest ​ Interest Rate ​ ​ ​ Expiration Date Entered (b) ​ Amount ​ Rate Paid (a) ​ Received ​ Effective Date ​ Date August 2017 ​ $ 200,000 2.1230 % 1-month Term SOFR November 2022 October 2025 August 2017 ​ $ 150,000 1.7720 % 1-month Term SOFR November 2022 February 2023 June 2018 ​ $ 200,000 ​ 2.8480 % 1-month Term SOFR ​ November 2022 ​ October 2025 June 2018 ​ $ 200,000 ​ 2.8284 % 1-month Term SOFR ​ November 2022 ​ October 2025 December 2018 ​ $ 200,000 ​ 2.7715 % 1-month Term SOFR ​ November 2022 ​ July 2027 (a) Plus applicable margin. (b) In October 2022, the Company amended the reference rate in all of its outstanding interest rate swap contracts to replace One-Month LIBOR with One-Month Term SOFR and certain credit spread adjustments. The Company did not record any gains or losses upon the conversion of the reference rates in these interest rate swap contracts, and the Company believes these amendments will not have a material impact on its Consolidated Financial Statements. On September 28, 2020, the Company terminated four of its interest rate swaps with notional amounts totaling $400,000, which would have expired in January 2021. As a result of terminating these interest rate swaps, the Company made total cash payments of $853 to the counterparties of the swap agreements. The fair values of derivative instruments designated as cash flow hedges as of December 31, 2022, were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives Designated as Cash ​ Asset Derivatives ​ Liability Derivatives Flow Hedges Balance Sheet Location Fair Value Balance Sheet Location Fair Value Interest rate swaps Prepaid expenses and other current assets (a) ​ $ 17,906 Accrued liabilities ​ $ — ​ Other assets, net ​ 13,901 ​ ​ ​ ​ Total derivatives designated as cash flow hedges ​ ​ ​ $ 31,807 ​ ​ ​ $ — (a) Represents the estimated amount of the existing unrealized gains on interest rate swaps as of December 31, 2022 (based on the interest rate yield curve at that date), included in AOCIL expected to be reclassified into pre-tax earnings within the next 12 months. The actual amounts reclassified into earnings are dependent on future movements in interest rates. The fair values of derivative instruments designated as cash flow hedges as of December 31, 2021, were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives Designated as Cash ​ Asset Derivatives ​ Liability Derivatives Flow Hedges Balance Sheet Location Fair Value Balance Sheet Location Fair Value Interest rate swaps Prepaid expenses and other current assets ​ $ — Accrued liabilities ​ $ (18,675) ​ ​ ​ ​ Other long-term liabilities ​ (32,406) Total derivatives designated as cash flow hedges ​ ​ ​ $ — ​ ​ ​ $ (51,081) ​ The following table summarizes the impact of the Company’s cash flow hedges on the results of operations, comprehensive income (loss) and AOCIL for the years ended December 31, 2022, 2021 and 2020: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives ​ ​ ​ Statement of ​ Amount of (Gain) or Loss Reclassified Designated as Cash ​ Amount of Gain or (Loss) Recognized ​ Net Income ​ from AOCIL into Earnings, Flow Hedges ​ as AOCIL on Derivatives, Net of Tax (a) ​ Classification ​ Net of Tax (b) ​ ​ Years Ended December 31, ​ ​ ​ Years Ended December 31, ​ 2022 2021 2020 ​ 2022 2021 2020 Interest rate swaps ​ $ 56,107 ​ $ 17,116 ​ $ (47,528) ​ Interest expense ​ $ 4,815 ​ $ 14,936 ​ $ 7,187 (a) In accordance with the derivatives and hedging guidance, the changes in fair values of interest rate swaps have been recorded in equity as a component of AOCIL. As the critical terms of the interest rate swaps match the underlying debt being hedged, all unrealized changes in fair value are recorded in AOCIL. (b) Amounts reclassified from AOCIL into earnings related to realized gains and losses on interest rate swaps are recognized when interest payments or receipts occur related to the swap contracts, which correspond to when interest payments are made on the Company’s hedged debt. See Note 15 for further discussion on the impact of the Company’s hedge accounting to its consolidated comprehensive income (loss) and AOCIL.
Income Taxes	Income Taxes Deferred tax assets and liabilities are determined based on differences between the financial reporting and income tax bases of assets and liabilities and are measured using the enacted tax rates and laws that are expected to be in effect when the differences are expected to reverse. The Company records valuation allowances to reduce net deferred tax assets to the amount considered more likely than not to be realized. The Company is required to evaluate whether the tax positions taken on its income tax returns will more likely than not be sustained upon examination by the appropriate taxing authority. If the Company determines that such tax positions will not be sustained, it records a liability for the related unrecognized tax benefits. The Company classifies its liability for unrecognized tax benefits as a current liability to the extent it anticipates making a payment within one year.
Share-Based Compensation	Share-Based Compensation Under the 2020 Employee Share Purchase Plan (the “ESPP”), participants will be granted an option to purchase Company common shares on the first business day of each offering period, with such option to be automatically exercised on the last business day of such offering period to purchase a whole number of the Company’s common shares determined by dividing the accumulated payroll deductions in the participant’s notional account on such exercise date by the applicable exercise price. The exercise price is equal to 95% of the closing price of the Company’s common shares on the last day of the relevant offering period; provided, however, that such exercise price will not be less than 85% of the volume weighted average price of the Company’s common shares as reflected on the Toronto Stock Exchange (the “TSX”) over the final five trading days of the offering period. The fair value of restricted share unit (“RSU”) awards is determined based on the number of RSUs granted and the closing price of the common shares in the capital of the Company adjusted for future dividends. The fair value of deferred share unit (“DSU”) awards is determined based on the number of DSUs granted and the closing price of the common shares in the capital of the Company. Compensation expense associated with outstanding performance-based restricted share unit (“PSU”) awards is measured using the fair value of the Company’s common shares adjusted for future dividends and is based on the estimated achievement of the established performance criteria at the end of each reporting period until the performance period ends, recognized ratably over the performance period. Compensation expense is only recognized for those awards that the Company expects to vest, which it estimates based upon an assessment of the probability that the performance criteria will be achieved. All share-based compensation cost is measured at the grant date, based on the estimated fair value of the award adjusted for future dividends, and is recognized on a straight-line basis as expense over the employee’s requisite service period. The Company recognizes gross share compensation expense with actual forfeitures as they occur. Warrants are valued using the Black-Scholes pricing model with a contractual life of five years, a risk free interest rate based on the 5-year U.S. treasury yield curve and expected volatility. The Company uses the historical volatility of its common shares over a period equivalent to the contractual life of the warrants to estimate the expected volatility. The fair market value of warrants issued to consultants for acquisitions are recorded immediately as share-based compensation expense. Share-based compensation expense recognized during the years ended December 31, 2022, 2021 and 2020, was $63,485 ($47,503 net of taxes), $58,221 ($43,495 net of taxes) and $45,751 ($34,197 net of taxes), respectively. This share-based compensation expense includes RSUs, PSUs, DSUs, share option and warrant expense. The share-based compensation expense totals include amounts associated with the Progressive Waste share-based compensation plans, continued by the Company following the Progressive Waste acquisition, which allow for the issuance of shares or cash settlement to employees upon vesting. The Company records share-based compensation expense in Selling, general and administrative expenses in the Consolidated Statements of Net Income. The total unrecognized compensation cost at December 31, 2022, related to unvested RSU awards was $73,304 and this future expense will be recognized over the remaining vesting period of the RSU awards, which extends to 2027. The weighted average remaining vesting period of the RSU awards is 1.4 years. The total unrecognized compensation cost at December 31, 2022, related to unvested PSU awards was $18,194 and this future expense will be recognized over the remaining vesting period of the PSU awards, which extends to 2025. The weighted average remaining vesting period of PSU awards is 1.1 years. Other Share-Based Awards As of December 31, 2022, 2021 and 2020, the Company had a liability of $8,042, $9,008 and $7,237, respectively, representing the December 31, 2022, 2021 and 2020 fair values, respectively, of outstanding Progressive Waste restricted share units which are expected to be cash settled. All remaining unvested Progressive Waste restricted share units vested during the year ended December 31, 2019. As of December 31, 2022, 2021 and 2020, the Company had a liability of $3,814, $4,088 and $3,556, respectively, representing the December 31, 2022, 2021 and 2020 fair value, respectively, of outstanding Progressive Waste share-based options which are expected to be cash settled. All remaining unvested Progressive Waste share-based options were fully vested as of December 31, 2017.
Per Share Information	Per Share Information Basic net income per share attributable to holders of the Company’s common shares is computed using the weighted average number of common shares outstanding and vested and unissued restricted share units deferred for issuance into the deferred compensation plan. Diluted net income per share attributable to holders of the Company’s common shares is computed using the weighted average number of common and potential common shares outstanding. Potential common shares are excluded from the computation if their effect is anti-dilutive.
Advertising Costs	Advertising Costs Advertising costs are expensed as incurred. Advertising expense for the years ended December 31, 2022, 2021 and 2020, was $8,335, $7,155 and $4,870, respectively, which is included in Selling, general and administrative expense in the Consolidated Statements of Net Income.
Insurance Liabilities	Insurance Liabilities As a result of its insurance policies, the Company is effectively self-insured for automobile liability, general liability, employer’s liability, environmental liability, cyber liability, employment practices liability, and directors’ and officers’ liability as well as for employee group health insurance, property and workers’ compensation. The Company’s insurance accruals are based on claims filed and estimates of claims incurred but not reported and are developed by the Company’s management with assistance from its third-party actuary and its third-party claims administrator. The insurance accruals are influenced by the Company’s past claims experience factors and by published industry development factors. At December 31, 2022 and 2021, the Company’s total accrual for self-insured liabilities was $151,379 and $147,757, respectively, which is included in Accrued liabilities in the Consolidated Balance Sheets. For the years ended December 31, 2022, 2021 and 2020, the Company recognized $204,347, $179,250 and $164,099, respectively, of self- insurance expense which is included in Cost of operations and Selling, general and administrative expense in the Consolidated Statements of Net Income.
Leases	The Company rents certain equipment and facilities under short-term agreements, non-cancelable operating lease agreements and finance leases. The Company determines if an arrangement is or contains a lease at contract inception. The Company recognizes a right-of-use (“ROU”) asset and a lease liability at the lease commencement date. The lease liability is initially measured at the present value of the unpaid lease payments at the lease commencement date. Key estimates and judgments include how the Company determines (1) the discount rate it uses to discount the unpaid lease payments to present value, (2) lease term and (3) lease payments. The lease guidance requires a lessee to discount its unpaid lease payments using the interest rate implicit in the lease or, if that rate cannot be readily determined, its incremental borrowing rate. Generally, the Company cannot determine the interest rate implicit in the lease because it does not have access to the lessor’s estimated residual value or the amount of the lessor’s deferred initial direct costs. Therefore, the Company generally uses its incremental borrowing rate as the discount rate for the lease. The Company’s incremental borrowing rate for a lease is the rate of interest it would have to pay on a collateralized basis to borrow an amount equal to the lease payments under similar terms. The lease term for the Company’s leases includes the noncancelable period of the lease, plus any additional periods covered by either a Company option to extend (or not to terminate) the lease that the Company is reasonably certain to exercise, or an option to extend (or not to terminate) the lease controlled by the lessor. Lease payments included in the measurement of the lease liability comprise fixed payments or variable lease payments. The variable lease payments take into account annual changes in the consumer price index and common area maintenance charges, if known. ROU assets for operating and finance leases are periodically reviewed for impairment losses. The Company uses the long-lived asset impairment guidance in ASC Subtopic 360-10, Property, Plant, and Equipment – Overall, to determine whether an ROU asset is impaired, and if so, the amount of the impairment loss to recognize. The Company did not recognize an impairment charge for any The Company monitors for events or changes in circumstances that require a reassessment of one of its leases. When a reassessment results in the remeasurement of a lease liability, a corresponding adjustment is made to the carrying amount of the corresponding ROU asset. The Company did not recognize any significant remeasurements during the years ended December 31, 2022, 2021 and 2020. The Company has elected not to recognize ROU assets and lease liabilities for short-term leases that have a lease term of less than 12 months. The Company has elected to apply the short-term lease recognition and measurement exemption allowed for in the lease accounting standard. The Company recognizes the lease payments associated with its short-term leases as an expense on a straight-line basis over the lease term.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total Reported Revenues by Service Line	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 31, ​ ​ 2023 2022 Commercial ​ $ 602,279 ​ $ 499,676 Residential ​ ​ 514,053 ​ ​ 440,288 ​ Industrial and construction roll off ​ ​ 318,315 ​ ​ 259,488 ​ Total collection ​ ​ 1,434,647 ​ ​ 1,199,452 ​ Landfill ​ ​ 343,433 ​ ​ 299,765 ​ Transfer ​ ​ 273,521 ​ ​ 217,957 ​ Recycling ​ ​ 31,301 ​ ​ 63,094 ​ E&P ​ ​ 51,759 ​ ​ 43,555 ​ Intermodal and other ​ ​ 38,212 ​ ​ 45,693 ​ Intercompany ​ ​ (272,370) ​ ​ (223,261) ​ Total ​ $ 1,900,503 ​ $ 1,646,255	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ 2022 2021 2020 Commercial $ 2,176,295 ​ $ 1,813,426 $ 1,610,313 Residential ​ ​ 1,891,108 ​ ​ 1,673,819 ​ ​ 1,528,217 Industrial and construction roll off ​ ​ 1,183,624 ​ ​ 954,181 ​ ​ 833,148 Total collection ​ ​ 5,251,027 ​ ​ 4,441,426 ​ ​ 3,971,678 Landfill ​ ​ 1,328,942 ​ ​ 1,233,499 ​ ​ 1,146,732 Transfer ​ ​ 1,026,050 ​ ​ 859,113 ​ ​ 777,754 Recycling ​ ​ 204,876 ​ ​ 205,076 ​ ​ 86,389 E&P ​ ​ 210,562 ​ ​ 138,707 ​ ​ 159,438 Intermodal and other ​ ​ 188,471 ​ ​ 152,194 ​ ​ 118,396 Intercompany ​ ​ (998,069) ​ ​ (878,654) ​ ​ (814,397) Total $ 7,211,859 ​ $ 6,151,361 $ 5,445,990
Allowance for Credit Loss	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 31, ​ ​ 2023 2022 Beginning balance ​ $ 22,939 ​ $ 18,480 Current period provision for expected credit losses ​ ​ 2,247 ​ ​ 3,022 Write-offs charged against the allowance ​ ​ (5,017) ​ ​ (3,435) Recoveries collected ​ ​ 2,068 ​ ​ 1,272 Impact of changes in foreign currency ​ ​ 2 ​ ​ 22 Ending balance ​ $ 22,239 ​ $ 19,361	The following is a rollforward of the Company’s allowance for credit losses for the periods indicated: ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ ​ 2022 2021 Beginning balance ​ $ 18,480 ​ $ 19,380 Current period provision for expected credit losses ​ ​ 17,353 ​ ​ 9,719 Write-offs charged against the allowance ​ ​ (18,273) ​ ​ (15,545) Recoveries collected ​ ​ 5,473 ​ ​ 4,918 Impact of changes in foreign currency ​ ​ (94) ​ ​ 8 Ending balance ​ $ 22,939 ​ $ 18,480
Property Plant and Equipment Estimated Useful Lives		The estimated useful lives are as follows: ​ ​ ​ ​ Buildings 10 Leasehold and land improvements 3 Machinery and equipment 3 Rolling stock 3 Containers 3
Reconciliation of Final Capping, Closure and Post-Closure Liability Balance	The following is a reconciliation of the Company’s final capping, closure and post-closure liability balance from December 31, 2022 to March 31, 2023: ​ ​ ​ ​ ​ Final capping, closure and post-closure liability at December 31, 2022 $ 344,606 Liability adjustments ​ 14,704 Accretion expense associated with landfill obligations ​ 4,474 Closure payments ​ (5,346) Assumption of closure liabilities from acquisitions ​ ​ 3,443 Foreign currency translation adjustment ​ 24 Final capping, closure and post-closure liability at March 31, 2023 ​ $ 361,905	The following is a reconciliation of the Company’s final capping, closure and post-closure liability balance from December 31, 2020 to December 31, 2022: ​ ​ ​ ​ ​ Final capping, closure and post-closure liability at December 31, 2020 $ 301,896 Liability adjustments ​ (1,081) Accretion expense associated with landfill obligations ​ 14,333 Closure payments ​ (21,040) Assumption of closure liabilities from acquisitions ​ 11,380 Disposition of closure liabilities from divested operations ​ ​ (3,566) Foreign currency translation adjustment ​ ​ 615 Final capping, closure and post-closure liability at December 31, 2021 ​ 302,537 Liability adjustments ​ 39,321 Accretion expense associated with landfill obligations ​ 16,068 Closure payments ​ (18,834) Assumption of closure liabilities from acquisitions ​ ​ 8,575 Disposition of closure liabilities from divested operations ​ ​ (916) Foreign currency translation adjustment ​ (2,145) Final capping, closure and post-closure liability at December 31, 2022 ​ $ 344,606
Restricted Cash and Restricted Investments		Restricted cash and restricted investments consist of the following: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2022 ​ December 31, 2021 ​ ​ Restricted ​ Restricted ​ Restricted ​ Restricted ​ Cash Investments Cash Investments Settlement of insurance claims ​ $ 88,360 ​ $ — ​ $ 52,906 ​ $ — Landfill closure and post-closure obligations ​ ​ 6,890 ​ ​ 57,469 ​ ​ 12,609 ​ ​ 56,289 Other financial assurance requirements ​ ​ 7,477 ​ ​ 10,630 ​ ​ 6,659 ​ ​ 2,725 ​ ​ $ 102,727 ​ $ 68,099 ​ $ 72,174 ​ $ 59,014
Carrying Values and Fair Values of Debt Instruments	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Carrying Value at ​ Fair Value (a) at ​ ​ March 31, ​ December 31, ​ March 31, ​ December 31, ​ 2023 2022 2023 2022 4.25% Senior Notes due 2028 ​ $ 500,000 ​ $ 500,000 ​ $ 491,500 ​ $ 470,850 3.50% Senior Notes due 2029 ​ $ 500,000 ​ $ 500,000 ​ $ 466,350 ​ $ 457,650 2.60% Senior Notes due 2030 ​ $ 600,000 ​ $ 600,000 ​ $ 525,060 ​ $ 510,540 2.20% Senior Notes due 2032 ​ $ 650,000 ​ $ 650,000 ​ $ 529,490 ​ $ 514,540 3.20% Senior Notes due 2032 ​ $ 500,000 ​ $ 500,000 ​ $ 444,800 ​ $ 429,000 4.20% Senior Notes due 2033 ​ $ 750,000 ​ $ 750,000 ​ $ 718,275 ​ $ 699,450 3.05% Senior Notes due 2050 ​ $ 500,000 ​ $ 500,000 ​ $ 341,300 ​ $ 343,300 2.95% Senior Notes due 2052 ​ $ 850,000 ​ $ 850,000 ​ $ 570,435 ​ $ 561,425 ____________________ *Senior Notes are classified as Level 2 within the fair value hierarchy. Fair value inputs include third-party calculations of the market interest rate of notes with similar ratings in similar industries over the remaining note terms.	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Carrying Value at ​ Fair Value (a) at ​ ​ December 31, ​ December 31, ​ December 31, ​ December 31, ​ 2022 2021 2022 2021 4.25% Senior Notes due 2028 ​ $ 500,000 ​ $ 500,000 ​ $ 470,850 ​ $ 561,350 3.50% Senior Notes due 2029 ​ $ 500,000 ​ $ 500,000 ​ $ 457,650 ​ $ 539,500 2.60% Senior Notes due 2030 ​ $ 600,000 ​ $ 600,000 ​ $ 510,540 ​ $ 610,440 2.20% Senior Notes due 2032 ​ $ 650,000 ​ $ 650,000 ​ $ 514,540 ​ $ 637,065 3.20% Senior Notes due 2032 ​ $ 500,000 ​ $ — ​ $ 429,000 ​ $ — 4.20% Senior Notes due 2033 ​ $ 750,000 ​ $ — ​ $ 699,450 ​ $ — 3.05% Senior Notes due 2050 ​ $ 500,000 ​ $ 500,000 ​ $ 343,300 ​ $ 496,350 2.95% Senior Notes due 2052 ​ $ 850,000 ​ $ 850,000 ​ $ 561,425 ​ $ 828,580 (a) Senior Notes are classified as Level 2 within the fair value hierarchy. Fair value inputs include third-party calculations of the market interest rate of notes with similar ratings in similar industries over the remaining note terms.
Fair Value of Derivative Instrument Designated as Cash Flow Hedges	The fair values of derivative instruments designated as cash flow hedges at March 31, 2023, were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives Designated as Cash ​ Asset Derivatives ​ Liability Derivatives Flow Hedges Balance Sheet Location Fair Value Balance Sheet Location Fair Value Interest rate swaps Prepaid expenses and other current assets (a) ​ $ 14,872 Accrued liabilities ​ $ — ​ Other assets, net ​ 9,555 ​ ​ ​ ​ Total derivatives designated as cash flow hedges ​ ​ ​ $ 24,427 ​ ​ ​ $ — ____________________ (a) Represents the estimated amount of the existing unrealized gains on interest rate swaps at March 31, 2023 (based on the interest rate yield curve at that date), included in AOCIL expected to be reclassified into pre-tax earnings within the next 12 months. The actual amounts reclassified into earnings are dependent on future movements in interest rates. The fair values of derivative instruments designated as cash flow hedges at December 31, 2022, were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives Designated as Cash ​ Asset Derivatives ​ Liability Derivatives Flow Hedges Balance Sheet Location Fair Value Balance Sheet Location Fair Value Interest rate swaps Prepaid expenses and other current assets ​ $ 17,906 Accrued liabilities ​ $ — ​ Other assets, net ​ 13,901 ​ ​ ​ Total derivatives designated as cash flow hedges ​ ​ ​ $ 31,807 ​ ​ ​ $ —	The fair values of derivative instruments designated as cash flow hedges as of December 31, 2022, were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives Designated as Cash ​ Asset Derivatives ​ Liability Derivatives Flow Hedges Balance Sheet Location Fair Value Balance Sheet Location Fair Value Interest rate swaps Prepaid expenses and other current assets (a) ​ $ 17,906 Accrued liabilities ​ $ — ​ Other assets, net ​ 13,901 ​ ​ ​ ​ Total derivatives designated as cash flow hedges ​ ​ ​ $ 31,807 ​ ​ ​ $ — (a) Represents the estimated amount of the existing unrealized gains on interest rate swaps as of December 31, 2022 (based on the interest rate yield curve at that date), included in AOCIL expected to be reclassified into pre-tax earnings within the next 12 months. The actual amounts reclassified into earnings are dependent on future movements in interest rates. The fair values of derivative instruments designated as cash flow hedges as of December 31, 2021, were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives Designated as Cash ​ Asset Derivatives ​ Liability Derivatives Flow Hedges Balance Sheet Location Fair Value Balance Sheet Location Fair Value Interest rate swaps Prepaid expenses and other current assets ​ $ — Accrued liabilities ​ $ (18,675) ​ ​ ​ ​ Other long-term liabilities ​ (32,406) Total derivatives designated as cash flow hedges ​ ​ ​ $ — ​ ​ ​ $ (51,081)
Impact of Cash Flow Hedges on Results of Operations, Comprehensive Income (Loss) and Accumulated Other Comprehensive Income (Loss)	The following table summarizes the impact of the Company’s cash flow hedges on the results of operations, comprehensive income (loss) and AOCIL for the three months ended March 31, 2023 and 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives ​ ​ ​ ​ ​ ​ ​ Statement of ​ Amount of (Gain) or Loss Reclassified Designated as Cash ​ Amount of Gain or (Loss) Recognized ​ Net Income ​ from AOCIL into Earnings, Flow Hedges ​ as AOCIL on Derivatives, Net of Tax (a) ​ Classification ​ Net of Tax (b) ​ ​ Three Months Ended ​ ​ ​ Three Months Ended ​ ​ March 31, ​ ​ ​ March 31, ​ 2023 2022 ​ 2023 2022 Interest rate swaps ​ $ (2,425) ​ $ 32,854 ​ Interest expense ​ $ (2,999) ​ $ 3,491 ​ ____________________ (a) In accordance with the derivatives and hedging guidance, the changes in fair values of interest rate swaps have been recorded in equity as a component of AOCIL. As the critical terms of the interest rate swaps match the underlying debt being hedged, all unrealized changes in fair value are recorded in AOCIL. (b) Amounts reclassified from AOCIL into earnings related to realized gains and losses on interest rate swaps are recognized when interest payments or receipts occur related to the swap contracts, which correspond to when interest payments are made on the Company’s hedged debt.	The following table summarizes the impact of the Company’s cash flow hedges on the results of operations, comprehensive income (loss) and AOCIL for the years ended December 31, 2022, 2021 and 2020: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives ​ ​ ​ Statement of ​ Amount of (Gain) or Loss Reclassified Designated as Cash ​ Amount of Gain or (Loss) Recognized ​ Net Income ​ from AOCIL into Earnings, Flow Hedges ​ as AOCIL on Derivatives, Net of Tax (a) ​ Classification ​ Net of Tax (b) ​ ​ Years Ended December 31, ​ ​ ​ Years Ended December 31, ​ 2022 2021 2020 ​ 2022 2021 2020 Interest rate swaps ​ $ 56,107 ​ $ 17,116 ​ $ (47,528) ​ Interest expense ​ $ 4,815 ​ $ 14,936 ​ $ 7,187 (a) In accordance with the derivatives and hedging guidance, the changes in fair values of interest rate swaps have been recorded in equity as a component of AOCIL. As the critical terms of the interest rate swaps match the underlying debt being hedged, all unrealized changes in fair value are recorded in AOCIL. (b) Amounts reclassified from AOCIL into earnings related to realized gains and losses on interest rate swaps are recognized when interest payments or receipts occur related to the swap contracts, which correspond to when interest payments are made on the Company’s hedged debt.
Interest Rate Swap [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Company's Derivative Instruments	At March 31, 2023, the Company’s derivative instruments included four interest rate swap agreements as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fixed Variable ​ ​ ​ ​ Notional ​ Interest ​ Interest Rate ​ ​ ​ ​ Date Entered (a) ​ Amount ​ Rate Paid (b) ​ Received ​ Effective Date ​ Expiration Date August 2017 ​ $ 200,000 2.1230 % 1-month Term SOFR November 2022 October 2025 June 2018 ​ $ 200,000 2.8480 % 1-month Term SOFR November 2022 October 2025 June 2018 ​ $ 200,000 2.8284 % 1-month Term SOFR November 2022 October 2025 December 2018 ​ $ 200,000 2.7715 % 1-month Term SOFR November 2022 July 2027 ____________________ (a) In October 2022, the Company amended the reference rate in all of its outstanding interest rate swap contracts to replace One-Month LIBOR with One-Month Term SOFR and certain credit spread adjustments. The Company did not record any gains or losses upon the conversion of the reference rates in these interest rate swap contracts, and the Company believes these amendments will not have a material impact on its Condensed Consolidated Financial Statements. (b) Plus applicable margin.	At December 31, 2022, the Company’s derivative instruments included five interest rate swap agreements as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fixed Variable ​ ​ ​ ​ Notional ​ Interest ​ Interest Rate ​ ​ ​ Expiration Date Entered (b) ​ Amount ​ Rate Paid (a) ​ Received ​ Effective Date ​ Date August 2017 ​ $ 200,000 2.1230 % 1-month Term SOFR November 2022 October 2025 August 2017 ​ $ 150,000 1.7720 % 1-month Term SOFR November 2022 February 2023 June 2018 ​ $ 200,000 ​ 2.8480 % 1-month Term SOFR ​ November 2022 ​ October 2025 June 2018 ​ $ 200,000 ​ 2.8284 % 1-month Term SOFR ​ November 2022 ​ October 2025 December 2018 ​ $ 200,000 ​ 2.7715 % 1-month Term SOFR ​ November 2022 ​ July 2027 (a) Plus applicable margin. (b) In October 2022, the Company amended the reference rate in all of its outstanding interest rate swap contracts to replace One-Month LIBOR with One-Month Term SOFR and certain credit spread adjustments. The Company did not record any gains or losses upon the conversion of the reference rates in these interest rate swap contracts, and the Company believes these amendments will not have a material impact on its Consolidated Financial Statements.

Prepaid Expenses and Other Cu_2

Prepaid Expenses and Other Current Assets (Tables)	12 Months Ended
	Dec. 31, 2022
Prepaid Expenses and Other Current Assets [Abstract]
Prepaid expenses and other current assets	Prepaid expenses and other current assets consist of the following: ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2022 2021 Income taxes receivable $ 43,055 $ 61,305 Inventory ​ ​ 55,188 ​ ​ 44,257 Prepaid insurance ​ ​ 31,588 ​ ​ 22,471 Unrealized cash flow hedge gains ​ ​ 17,906 ​ ​ — Prepaid licenses and permits ​ ​ 12,116 ​ ​ 10,683 Other ​ ​ 45,293 ​ ​ 37,006 ​ $ 205,146 $ 175,722

Property and Equipment, Net (Ta

Property and Equipment, Net (Tables)	12 Months Ended
	Dec. 31, 2022
Property and Equipment, Net [Abstract]
Property and Equipment, Net	Property and equipment, net consists of the following: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2022 2021 Landfill site costs ​ $ 5,179,768 ​ $ 4,447,530 Rolling stock ​ 2,835,330 ​ 2,483,294 Land, buildings and improvements ​ 1,673,062 ​ 1,339,542 Containers ​ 1,180,370 ​ 983,602 Machinery and equipment ​ 1,065,767 ​ 940,723 Construction in progress ​ 132,367 ​ 82,187 ​ ​ 12,066,664 ​ 10,276,878 Less accumulated depreciation and depletion ​ (5,115,749) ​ (4,554,929) ​ ​ $ 6,950,915 ​ $ 5,721,949

Leases (Tables)_2

Leases (Tables)	12 Months Ended
	Dec. 31, 2022
Lessee Disclosure [Abstract]
Summary of lease cost for operating and finance leases	Lease cost for operating and finance leases for the years ended December 31, 2022, 2021 and 2020 were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ ​ 2022 ​ 2021 ​ 2020 Operating lease cost ​ $ 41,891 ​ $ 40,381 ​ $ 39,411 Finance lease cost: ​ ​ ​ ​ ​ ​ ​ ​ ​ Amortization of leased assets ​ ​ 2,484 ​ ​ 3,424 ​ ​ — Interest on leased liabilities ​ ​ 219 ​ ​ 152 ​ ​ — Total lease cost ​ $ 44,594 ​ $ 43,957 ​ $ 39,411 ​ Supplemental cash flow information and non-cash activity related to the Company’s leases are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ ​ 2022 ​ ​ 2021 ​ ​ 2020 Cash paid for amounts included in the measurement of lease liabilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ Operating cash flows from operating leases ​ $ 40,782 ​ $ 40,249 ​ $ 39,212 Operating cash flows from finance leases ​ $ 219 ​ $ 152 ​ $ — Financing cash flows from finance leases ​ $ 5,560 ​ $ 3,133 ​ $ — Non-cash activity: ​ ​ ​ ​ ​ ​ ​ ​ ​ Right-of-use assets obtained in exchange for lease liabilities - operating leases ​ $ 63,648 ​ $ 17,933 ​ $ 15,117 Right-of-use assets obtained in exchange for lease liabilities - finance leases ​ $ 3,369 ​ $ 10,012 ​ $ 3,754 ​ Weighted-average remaining lease term and discount rate for the Company’s leases are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ 2022 ​ 2021 ​ 2020 Weighted average remaining lease term - operating leases ​ 8.9 years 8.0 years 8.6 years Weighted average remaining lease term - finance leases ​ 4.2 years ​ 4.9 years ​ 5.4 years Weighted average discount rate - operating leases ​ 2.93 % 3.37 % 3.86 % Weighted average discount rate - finance leases ​ 1.96 % ​ 1.89 % ​ 1.89 %
Summary of future minimum lease payments, operating leases	As of December 31, 2022, future minimum lease payments, reconciled to the respective lease liabilities, are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Operating Leases ​ ​ Finance Leases 2023 $ 40,499 ​ $ 2,906 2024 ​ 32,521 ​ 2,905 2025 ​ 26,869 ​ 2,905 2026 ​ 22,317 ​ 2,320 2027 ​ 19,528 ​ 898 Thereafter ​ 89,050 ​ — Minimum lease payments ​ 230,784 ​ 11,934 Less: imputed interest ​ (30,152) ​ (470) Present value of minimum lease payments ​ ​ 200,632 ​ ​ 11,464 Less: current portion of lease liabilities ​ ​ (35,170) ​ ​ (2,695) Long-term portion of lease liabilities ​ $ 165,462 ​ $ 8,769
Summary of future minimum lease payments, finance leases	As of December 31, 2022, future minimum lease payments, reconciled to the respective lease liabilities, are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Operating Leases ​ ​ Finance Leases 2023 $ 40,499 ​ $ 2,906 2024 ​ 32,521 ​ 2,905 2025 ​ 26,869 ​ 2,905 2026 ​ 22,317 ​ 2,320 2027 ​ 19,528 ​ 898 Thereafter ​ 89,050 ​ — Minimum lease payments ​ 230,784 ​ 11,934 Less: imputed interest ​ (30,152) ​ (470) Present value of minimum lease payments ​ ​ 200,632 ​ ​ 11,464 Less: current portion of lease liabilities ​ ​ (35,170) ​ ​ (2,695) Long-term portion of lease liabilities ​ $ 165,462 ​ $ 8,769

Acquisitions (Tables)_2

Acquisitions (Tables)	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Acquisitions [Abstract]
Summary of Consideration Transferred to Acquire Businesses and Amounts of Identifiable Assets Acquired, Liabilities Assumed and Noncontrolling Interests	​ ​ ​ ​ ​ ​ ​ ​ ​ 2023 2022 ​ ​ Acquisitions ​ Acquisitions Fair value of consideration transferred: ​ ​ Cash ​ $ 144,611 ​ $ 355,212 Debt assumed ​ 17,097 ​ — ​ ​ 161,708 ​ 355,212 ​ ​ ​ ​ ​ ​ ​ Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired: ​ ​ ​ ​ Accounts receivable ​ 3,882 ​ 9,211 Prepaid expenses and other current assets ​ 2,290 ​ 2,059 Restricted investments ​ ​ 5,462 ​ ​ — Operating lease right-of-use assets ​ ​ 587 ​ ​ 1,715 Property and equipment ​ 67,201 ​ 89,565 Long-term franchise agreements and contracts ​ 58,630 ​ 4,994 Customer lists ​ 1,527 ​ 38,944 Permits and other intangibles ​ ​ 2,403 ​ ​ 34,245 Accounts payable and accrued liabilities ​ (4,159) ​ (20,382) Current portion of operating lease liabilities ​ ​ (53) ​ ​ (830) Deferred revenue ​ (761) ​ (3,077) Contingent consideration ​ (6,000) ​ (5,000) Long-term portion of operating lease liabilities ​ ​ (534) ​ ​ (885) Other long-term liabilities ​ (4,543) ​ (631) Deferred income taxes ​ (1,077) ​ (9,317) Total identifiable net assets ​ 124,855 ​ 140,611 Goodwill ​ $ 36,853 ​ $ 214,601	The following table summarizes the consideration transferred to acquire these businesses and the amounts of identifiable assets acquired and liabilities assumed at the acquisition dates for the acquisitions consummated in the years ended December 31, 2022, 2021 and 2020: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2022 2021 2020 ​ ​ Acquisitions ​ Acquisitions ​ Acquisitions Fair value of consideration transferred: ​ ​ ​ Cash ​ $ 2,206,901 ​ $ 960,449 ​ $ 388,789 Debt assumed ​ 127,136 ​ 108,345 ​ 91,349 Change in open working capital settlements at year end ​ ​ — ​ ​ — ​ ​ 1,505 ​ ​ 2,334,037 ​ 1,068,794 ​ 481,643 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired: ​ ​ ​ ​ ​ Accounts receivable ​ 49,696 ​ 33,236 ​ 13,759 Prepaid expenses and other current assets ​ 9,428 ​ 4,866 ​ 4,509 Restricted investments ​ ​ 7,469 ​ ​ — ​ ​ — Operating lease right-of-use assets ​ ​ 4,707 ​ ​ 5,972 ​ ​ 5,247 Property and equipment ​ 1,073,155 ​ 394,687 ​ 173,394 Long-term franchise agreements and contracts ​ 239,866 ​ 134,827 ​ 59,149 Indefinite-lived intangibles ​ — ​ 9,557 ​ 13,465 Customer lists ​ 74,940 ​ 75,612 ​ 48,512 Permits and other intangibles ​ ​ 187,107 ​ ​ 116,967 ​ ​ 10,507 Other assets ​ 243 ​ 77 ​ 389 Accounts payable and accrued liabilities ​ (56,633) ​ (37,827) ​ (14,174) Current portion of operating lease liabilities ​ ​ (1,546) ​ ​ (1,370) ​ ​ (509) Deferred revenue ​ (10,761) ​ (8,389) ​ (1,821) Contingent consideration ​ (6,642) ​ (31,616) ​ (4,688) Long-term portion of operating lease liabilities ​ ​ (3,161) ​ ​ (4,602) ​ ​ (4,738) Other long-term liabilities ​ (6,915) ​ (13,976) ​ (2,136) Deferred income taxes ​ (51,507) ​ (63,822) ​ (4,525) Total identifiable net assets ​ 1,509,446 ​ 614,199 ​ 296,340 Goodwill ​ $ 824,591 ​ $ 454,595 ​ $ 185,303

Intangible Assets, Net (Table_2

Intangible Assets, Net (Tables)	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Intangible Assets, Net [Abstract]
Intangible Assets Exclusive of Goodwill	Intangible assets, exclusive of goodwill, consisted of the following at March 31, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross ​ ​ Accumulated Net ​ ​ Carrying ​ Accumulated ​ Impairment ​ Carrying ​ ​ Amount ​ Amortization ​ Loss ​ Amount Finite-lived intangible assets: ​ ​ ​ ​ Long-term franchise agreements and contracts ​ $ 975,058 ​ $ (312,988) ​ $ — ​ $ 662,070 Customer lists ​ 778,352 ​ (545,232) ​ — ​ 233,120 Permits and other ​ 782,166 ​ (120,992) ​ (40,784) ​ 620,390 ​ ​ 2,535,576 ​ (979,212) ​ (40,784) ​ 1,515,580 Indefinite-lived intangible assets: ​ ​ ​ ​ Solid waste collection and transportation permits ​ 181,613 ​ — ​ — ​ 181,613 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Intangible assets, exclusive of goodwill ​ $ 2,717,189 ​ $ (979,212) ​ $ (40,784) ​ $ 1,697,193 Intangible assets, exclusive of goodwill, consisted of the following at December 31, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross ​ ​ Accumulated Net ​ ​ Carrying ​ Accumulated ​ Impairment ​ Carrying ​ ​ Amount ​ Amortization ​ Loss ​ Amount Finite-lived intangible assets: ​ ​ ​ ​ Long-term franchise agreements and contracts ​ $ 916,582 ​ $ (297,382) ​ $ — ​ $ 619,200 Customer lists ​ 776,719 ​ (527,425) ​ — ​ 249,294 Permits and other ​ 779,689 ​ (115,095) ​ (40,784) ​ 623,810 ​ ​ 2,472,990 ​ (939,902) ​ (40,784) ​ 1,492,304 Indefinite-lived intangible assets: ​ ​ ​ ​ Solid waste collection and transportation permits ​ 181,613 ​ — ​ — ​ 181,613 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Intangible assets, exclusive of goodwill ​ $ 2,654,603 ​ $ (939,902) ​ $ (40,784) ​ $ 1,673,917	Intangible assets, exclusive of goodwill, consisted of the following at December 31, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross ​ ​ Accumulated Net ​ ​ Carrying ​ Accumulated ​ Impairment ​ Carrying ​ ​ Amount ​ Amortization ​ Loss ​ Amount Finite-lived intangible assets: ​ ​ ​ ​ Long-term franchise agreements and contracts ​ $ 916,582 ​ $ (297,382) ​ $ — ​ $ 619,200 Customer lists ​ 776,719 ​ (527,425) ​ — ​ 249,294 Permits and other ​ 779,689 ​ (115,095) ​ (40,784) ​ 623,810 ​ ​ 2,472,990 ​ (939,902) ​ (40,784) ​ 1,492,304 Indefinite-lived intangible assets: ​ ​ ​ ​ Solid waste collection and transportation permits ​ 181,613 ​ — ​ — ​ 181,613 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Intangible assets, exclusive of goodwill ​ $ 2,654,603 ​ $ (939,902) ​ $ (40,784) ​ $ 1,673,917 Intangible assets, exclusive of goodwill, consisted of the following at December 31, 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross ​ ​ Accumulated Net ​ ​ Carrying ​ Accumulated ​ Impairment ​ Carrying ​ ​ Amount ​ Amortization ​ Loss ​ Amount Finite-lived intangible assets: ​ ​ ​ ​ Long-term franchise agreements and contracts ​ $ 724,128 ​ $ (278,827) ​ $ — ​ $ 445,301 Customer lists ​ 711,047 ​ (450,109) ​ — ​ 260,938 Permits and other ​ 598,336 ​ (94,807) ​ (40,784) ​ 462,745 ​ ​ 2,033,511 ​ (823,743) ​ (40,784) ​ 1,168,984 Indefinite-lived intangible assets: ​ ​ ​ ​ Solid waste collection and transportation permits ​ 181,613 ​ — ​ — ​ 181,613 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Intangible assets, exclusive of goodwill ​ $ 2,215,124 ​ $ (823,743) ​ $ (40,784) ​ $ 1,350,597
Estimated Future Amortization Expense of Amortizable Intangible Assets	Estimated future amortization expense for the next five years relating to finite-lived intangible assets owned as of March 31, 2023 is as follows: ​ ​ ​ ​ ​ For the year ending December 31, 2023 $ 156,320 For the year ending December 31, 2024 ​ $ 141,755 For the year ending December 31, 2025 ​ $ 124,919 For the year ending December 31, 2026 ​ $ 109,325 For the year ending December 31, 2027 ​ $ 95,730	Estimated future amortization expense for the next five years relating to finite-lived intangible assets is as follows: ​ ​ ​ ​ ​ For the year ending December 31, 2023 $ 153,457 For the year ending December 31, 2024 ​ $ 135,884 For the year ending December 31, 2025 ​ $ 119,071 For the year ending December 31, 2026 ​ $ 103,541 For the year ending December 31, 2027 ​ $ 89,959

Accrued Liabilities (Tables)

Accrued Liabilities (Tables)	12 Months Ended
	Dec. 31, 2022
Accrued Liabilities [Abstract]
Accrued Liabilities	Accrued liabilities consist of the following: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2022 2021 Insurance claims and premiums ​ $ 152,242 ​ $ 149,864 Payroll and payroll-related ​ 126,301 ​ 141,877 Interest payable ​ 47,612 ​ 28,729 Final capping, closure and post-closure liability ​ ​ 17,336 ​ ​ 19,925 Property taxes ​ ​ 11,218 ​ ​ 8,833 Environmental remediation reserves ​ 3,165 ​ 2,300 Cell processing reserves ​ 2,939 ​ 3,364 Share-based compensation plan liability ​ 2,344 ​ 2,423 Transaction-related expenses ​ ​ 1,627 ​ ​ 3,130 Unrealized cash flow hedge losses ​ — ​ 18,675 Other ​ 66,463 ​ 63,476 ​ ​ $ 431,247 ​ $ 442,596

Long-Term Debt (Tables)_2

Long-Term Debt (Tables)	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Long-Term Debt [Abstract]
Long-Term Debt	The following table presents the Company’s long-term debt at March 31, 2023 and December 31, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, ​ December 31, ​ ​ 2023 2022 Revolver under Credit Agreement, bearing interest ranging from 5.77% to 5.92% (a) ​ $ 650,587 ​ $ 614,705 ​ Term loan under Credit Agreement, bearing interest at 5.77% (a) ​ 650,000 ​ 650,000 ​ Term loan under Term Loan Agreement, bearing interest at 5.78% (a) ​ ​ 800,000 ​ ​ 800,000 ​ 4.25% Senior Notes due 2028 ​ ​ 500,000 ​ ​ 500,000 ​ 3.50% Senior Notes due 2029 ​ ​ 500,000 ​ ​ 500,000 ​ 2.60% Senior Notes due 2030 ​ ​ 600,000 ​ ​ 600,000 ​ 2.20% Senior Notes due 2032 ​ ​ 650,000 ​ ​ 650,000 ​ 3.20% Senior Notes due 2032 ​ ​ 500,000 ​ ​ 500,000 ​ 4.20% Senior Notes due 2033 ​ ​ 750,000 ​ ​ 750,000 ​ 3.05% Senior Notes due 2050 ​ ​ 500,000 ​ ​ 500,000 ​ 2.95% Senior Notes due 2052 ​ ​ 850,000 ​ ​ 850,000 ​ Notes payable to sellers and other third parties, bearing interest ranging from 2.42% to 10.35%, principal and interest payments due periodically with due dates ranging from 2024 to 2036 (a) ​ 36,049 ​ 37,232 ​ Finance leases, bearing interest ranging from 1.89% to 2.16%, with lease expiration dates ranging from 2026 to 2027 (a) ​ ​ 10,791 ​ ​ 11,464 ​ ​ ​ 6,997,427 ​ 6,963,401 ​ Less – current portion ​ (10,513) ​ (6,759) ​ Less – unamortized debt discount and issuance costs ​ (65,075) ​ (66,493) ​ Long-term portion of debt and notes payable ​ $ 6,921,839 ​ $ 6,890,149 ​ ____________________ (a) Interest rates represent the interest rates at March 31, 2023.	The following table presents the Company’s long-term debt as of December 31, 2022 and 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ December 31, ​ ​ 2022 2021 Revolver under Credit Agreement, bearing interest ranging from 5.42% to 5.74% (a) ​ $ 614,705 ​ $ 803,944 ​ Term loan under Credit Agreement, bearing interest at 5.42% (a) ​ 650,000 ​ 650,000 ​ Term loan under Term Loan Agreement, bearing interest at 5.42% (a), (b) ​ ​ 800,000 ​ ​ — ​ 4.25% Senior Notes due 2028 ​ ​ 500,000 ​ ​ 500,000 ​ 3.50% Senior Notes due 2029 ​ ​ 500,000 ​ ​ 500,000 ​ 2.60% Senior Notes due 2030 ​ ​ 600,000 ​ ​ 600,000 ​ 2.20% Senior Notes due 2032 ​ ​ 650,000 ​ ​ 650,000 ​ 3.20% Senior Notes due 2032 ​ ​ 500,000 ​ ​ — ​ 4.20% Senior Notes due 2033 ​ ​ 750,000 ​ ​ — ​ 3.05% Senior Notes due 2050 ​ ​ 500,000 ​ ​ 500,000 ​ 2.95% Senior Notes due 2052 ​ ​ 850,000 ​ ​ 850,000 ​ Notes payable to sellers and other third parties, bearing interest ranging from 2.42% to 10.35%, principal and interest payments due periodically with due dates ranging from 2024 to 2036 (a) ​ 37,232 ​ 37,508 ​ Finance leases, bearing interest ranging from 1.89% to 2.16%, with lease expiration dates ranging from 2026 to 2027 (a) ​ ​ 11,464 ​ ​ 10,519 ​ ​ ​ 6,963,401 ​ 5,101,971 ​ Less – current portion ​ (6,759) ​ (6,020) ​ Less – unamortized debt discount and issuance costs ​ (66,493) ​ (55,451) ​ ​ ​ $ 6,890,149 ​ $ 5,040,500 ​ (a) Interest rates represent the interest rates incurred at December 31, 2022. (b) Interest rate margin for term loan under Term Loan Agreement was 1.00% at December 31, 2022.
Details of the Company's Credit Agreement	Details of the Credit Agreement are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, ​ December 31, ​ ​ 2023 2022 Revolver under Credit Agreement ​ ​ ​ Available ​ $ 1,159,902 ​ $ 1,193,502 ​ ​ Letters of credit outstanding ​ $ 39,511 ​ $ 41,793 ​ ​ Total amount drawn, as follows: ​ $ 650,587 ​ $ 614,705 ​ ​ Amount drawn – U.S. Term SOFR rate loan ​ $ 280,000 ​ $ 391,000 ​ ​ Interest rate applicable – U.S. Term SOFR rate loan ​ ​ 5.77 % ​ 5.42 % ​ Amount drawn – U.S. Term SOFR rate loan ​ $ 100,000 ​ $ — ​ ​ Interest rate applicable – U.S. Term SOFR rate loan ​ ​ 5.78 % ​ — % ​ Amount drawn – U.S. Term SOFR rate loan ​ $ 60,000 ​ $ — ​ ​ Interest rate applicable – U.S. Term SOFR rate loan ​ ​ 5.91 % ​ — % ​ Amount drawn – Canadian bankers’ acceptance ​ $ 210,587 ​ $ 223,705 ​ ​ Interest rate applicable – Canadian bankers’ acceptance ​ 5.92 % 5.74 % ​ Commitment – rate applicable ​ 0.09 % 0.09 % ​ Term loan under Credit Agreement ​ ​ ​ ​ ​ ​ Amount drawn – U.S. Term SOFR rate loan ​ $ 650,000 ​ $ 650,000 ​ ​ Interest rate applicable – U.S. Term SOFR rate loan ​ ​ 5.77 % ​ 5.42 % ​	Details of the Credit Agreement are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2022 2021 Revolver under Credit Agreement ​ ​ ​ Available ​ $ 1,193,502 ​ $ 933,775 ​ Letters of credit outstanding ​ $ 41,793 ​ $ 112,281 ​ Total amount drawn, as follows: ​ $ 614,705 ​ $ 803,944 ​ Amount drawn – U.S. Term SOFR rate loan ​ $ 391,000 ​ ​ Not applicable ​ Interest rate applicable – U.S. Term SOFR rate loan ​ ​ 5.42 % ​ Not applicable ​ Interest rate margin – U.S. Term SOFR rate loan ​ ​ 1.00 % ​ Not applicable ​ Amount drawn – U.S. LIBOR rate loan ​ ​ Not applicable ​ $ 631,000 ​ Interest rate applicable – U.S. LIBOR rate loan ​ ​ Not applicable ​ ​ 1.10 % Interest rate margin – U.S. LIBOR rate loan ​ ​ Not applicable ​ ​ 1.00 % Amount drawn – U.S. base rate loan ​ $ — ​ $ 158,000 ​ Interest rate applicable – U.S. base rate loan ​ ​ — % ​ 3.25 % Interest rate margin – U.S. base rate loan ​ ​ — % ​ 0.00 % Amount drawn – U.S. swingline loan ​ $ — ​ $ 11,000 ​ Interest rate applicable – U.S. swingline loan ​ ​ — % ​ 3.25 % Interest rate margin – U.S. swingline loan ​ ​ — % ​ 0.00 % Amount drawn – Canadian bankers’ acceptance ​ $ 223,705 ​ $ 3,944 ​ Interest rate applicable – Canadian bankers’ acceptance ​ 5.74 % 1.45 % Interest rate acceptance fee – Canadian bankers’ acceptance ​ 1.00 % 1.00 % Commitment – rate applicable ​ 0.09 % 0.09 % Term loan under Credit Agreement ​ ​ ​ ​ ​ Amount drawn – U.S. Term SOFR rate loan ​ $ 650,000 ​ ​ Not applicable ​ Interest rate applicable – U.S. Term SOFR rate loan ​ ​ 5.42 % ​ Not applicable ​ Interest rate margin – U.S. Term SOFR rate loan ​ ​ 1.00 % ​ Not applicable ​ Amount drawn – U.S. based LIBOR loan ​ ​ Not applicable ​ $ 650,000 ​ Interest rate applicable – U.S. based LIBOR loan ​ ​ Not applicable ​ 1.10 % Interest rate margin – U.S. based LIBOR loan ​ ​ Not applicable ​ 1.20 %
Aggregate Contractual Future Principal Payments by Calendar Year on Long-Term Debt		As of December 31, 2022, aggregate contractual future principal payments by calendar year on long-term debt are due as follows: ​ ​ ​ ​ ​ 2023 $ 6,759 2024 ​ 10,636 2025 ​ 7,112 2026 ​ 2,071,152 2027 ​ 5,179 Thereafter ​ 4,862,563 ​ ​ $ 6,963,401

Fair Value of Financial Instr_5

Fair Value of Financial Instruments (Tables)	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Fair Value [Abstract]
Assets and Liabilities Measured at Fair Value on Recurring Basis	The Company’s assets and liabilities measured at fair value on a recurring basis at March 31, 2023 and December 31, 2022, were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurement at March 31, 2023 Using ​ ​ ​ Quoted Prices in Significant ​ ​ ​ ​ ​ ​ ​ Active Markets ​ Other ​ Significant ​ ​ ​ ​ ​ for Identical ​ Observable ​ Unobservable ​ ​ ​ ​ ​ Assets ​ Inputs ​ Inputs ​ ​ Total ​ (Level 1) ​ (Level 2) ​ (Level 3) Interest rate swap derivative instruments – net asset position ​ $ 24,427 ​ $ — ​ $ 24,427 ​ $ — Restricted cash ​ $ 106,625 ​ $ 106,625 ​ $ — ​ $ — Restricted investments ​ $ 72,784 ​ $ — ​ $ 72,784 ​ $ — Contingent consideration ​ $ (85,822) ​ $ — ​ $ — ​ $ (85,822) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurement at December 31, 2022 Using ​ ​ ​ Quoted Prices in Significant ​ ​ ​ ​ ​ ​ ​ Active Markets ​ Other ​ Significant ​ ​ ​ ​ ​ for Identical ​ Observable ​ Unobservable ​ ​ ​ ​ ​ Assets ​ Inputs ​ Inputs ​ ​ Total ​ (Level 1) ​ (Level 2) ​ (Level 3) Interest rate swap derivative instruments – net asset position ​ $ 31,807 ​ $ — ​ $ 31,807 ​ $ — Restricted cash ​ $ 102,727 ​ $ 102,727 ​ $ — ​ $ — Restricted investments ​ $ 66,402 ​ $ — ​ $ 66,402 ​ $ — Contingent consideration ​ $ (81,415) ​ $ — ​ $ — ​ $ (81,415)	The Company’s assets and liabilities measured at fair value on a recurring basis at December 31, 2022 and 2021, were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurement at December 31, 2022 Using ​ ​ ​ Quoted Prices in Significant ​ ​ ​ ​ ​ ​ ​ Active Markets ​ Other ​ Significant ​ ​ ​ ​ ​ for Identical ​ Observable ​ Unobservable ​ ​ ​ ​ ​ Assets ​ Inputs ​ Inputs ​ ​ Total ​ (Level 1) ​ (Level 2) ​ (Level 3) Interest rate swap derivative instruments – net asset position ​ $ 31,807 ​ $ — ​ $ 31,807 ​ $ — Restricted cash ​ $ 102,727 ​ $ 102,727 ​ $ — ​ $ — Restricted investments ​ $ 66,402 ​ $ — ​ $ 66,402 ​ $ — Contingent consideration ​ $ (81,415) ​ $ — ​ $ — ​ $ (81,415) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurement at December 31, 2021 Using ​ ​ ​ Quoted Prices in Significant ​ ​ ​ ​ ​ ​ ​ Active Markets ​ Other ​ Significant ​ ​ ​ ​ ​ for Identical ​ Observable ​ Unobservable ​ ​ ​ ​ ​ Assets ​ Inputs ​ Inputs ​ ​ Total ​ (Level 1) ​ (Level 2) ​ (Level 3) Interest rate swap derivative instruments – net liability position ​ $ (51,081) ​ $ — ​ $ (51,081) ​ $ — Restricted cash ​ $ 72,174 ​ $ 72,174 ​ $ — ​ $ — Restricted investments ​ $ 58,797 ​ $ — ​ $ 58,797 ​ $ — Contingent consideration ​ $ (94,308) ​ $ — ​ $ — ​ $ (94,308)
Fair Value for Level 3 Liabilities	The following table summarizes the changes in the fair value for Level 3 liabilities related to contingent consideration for the three months ended March 31, 2023 and 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 31, ​ ​ 2023 2022 Beginning balance ​ $ 81,415 ​ $ 94,308 ​ Contingent consideration recorded at acquisition date ​ 6,000 ​ 5,000 ​ Payment of contingent consideration recorded at acquisition date ​ (1,319) ​ (3,571) ​ Adjustments to contingent consideration ​ ​ (637) ​ (52) ​ Interest accretion expense ​ 363 ​ 353 ​ Ending balance ​ $ 85,822 ​ $ 96,038 ​	The following table summarizes the changes in the fair value for Level 3 liabilities related to contingent consideration for the years ended December 31, 2022 and 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ 2022 2021 Beginning balance ​ $ 94,308 ​ $ 71,736 Contingent consideration recorded at acquisition date ​ 6,642 ​ 31,616 Payment of contingent consideration recorded at acquisition date ​ (16,911) ​ (12,934) Payment of contingent consideration recorded in earnings ​ (2,982) ​ (520) Adjustments to contingent consideration ​ ​ (1,030) ​ ​ 2,954 Interest accretion expense ​ 1,417 ​ 1,470 Foreign currency translation adjustment ​ (29) ​ (14) Ending balance ​ $ 81,415 ​ $ 94,308

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2022
Commitments and Contingencies [Abstract]
Future Minimum Purchase Commitments	As of December 31, 2022, future minimum purchase commitments, by calendar year, are as follows: ​ ​ ​ ​ ​ 2023 $ 149,858 2024 ​ 35,060 ​ ​ $ 184,918

Shareholders' Equity (Tables)_2

Shareholders' Equity (Tables)	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common Stock Shares Reserved for Issuance		​ ​ ​ ​ For outstanding RSUs, PSUs and warrants 2,233,831 For future grants under the 2016 Incentive Award Plan 3,262,941 For future grants under the Employee Share Purchase Plan ​ 948,011 ​ 6,444,783
Restricted Stock Units Activity		A summary of the Company’s RSU activity is presented below: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ 2022 2021 2020 Weighted average grant-date fair value of restricted share units granted ​ $ 121.26 ​ $ 100.27 ​ $ 101.79 Total fair value of restricted share units vested ​ $ 28,751 ​ $ 26,711 ​ $ 23,742
Summary of Warrant Activity		A summary of warrant activity during the year ended December 31, 2022, is presented below: ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted-Average ​ ​ Warrants ​ Exercise Price Outstanding at December 31, 2021 578,405 ​ $ 104.82 Granted 380,478 ​ $ 138.33 Forfeited (65,331) ​ $ 80.49 Exercised (38,922) ​ $ 78.24 Outstanding at December 31, 2022 854,630 ​ $ 122.81
Summarized Information about Warrants Outstanding		The following table summarizes information about warrants outstanding as of December 31, 2022 and 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value of ​ ​ ​ ​ ​ ​ Warrants ​ ​ ​ Warrants ​ Outstanding at December 31, Grant Date ​ Issued ​ Exercise Price ​ Issued ​ 2022 ​ 2021 Throughout 2017 35,382 ​ $53.65 to $69.96 ​ $ 595 — 1,521 Throughout 2018 163,995 ​ $70.91 to $80.90 ​ $ 2,591 45,024 112,756 Throughout 2019 ​ 151,008 ​ $74.25 to $95.61 ​ $ 2,634 ​ 66,977 ​ 101,977 Throughout 2020 ​ 164,890 ​ $72.65 to $104.89 ​ $ 3,140 ​ 146,386 ​ 146,386 Throughout 2021 ​ 218,166 ​ $99.33 to $135.97 ​ $ 5,584 ​ 215,765 ​ 215,765 Throughout 2022 ​ 380,478 ​ $125.32 to $143.95 ​ $ 12,972 ​ 380,478 ​ — ​ ​ ​ ​ ​ ​ ​ 854,630 578,405
Restricted Stock Units (RSUs) [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Summary of Activity Related to Restricted Share Units	A summary of activity related to restricted share units (“RSUs”) during the three-month period ended March 31, 2023, is presented below: ​ ​ ​ ​ ​ Unvested Shares Outstanding at December 31, 2022 955,999 Granted 403,026 Forfeited (13,835) Vested and issued (325,490) Outstanding at March 31, 2023 1,019,700	A summary of activity related to RSUs during the year ended December 31, 2022, is presented below: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted-Average ​ ​ ​ ​ Grant Date Fair ​ Unvested Shares ​ Value Per Share Outstanding at December 31, 2021 861,695 ​ $ 95.63 Granted 483,281 ​ $ 121.26 Forfeited (70,126) ​ $ 110.86 Vested and issued (318,851) ​ $ 90.17 Outstanding at December 31, 2022 955,999 ​ $ 109.29
Performance Shares [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Performance-Based Restricted Share Units Activity		A summary of the Company’s PSU activity is presented below: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ 2022 2021 2020 Weighted average grant-date fair value of PSUs granted ​ $ 117.94 ​ $ 96.99 ​ $ 87.19 Total fair value of PSUs vested ​ $ 4,674 ​ $ 10,954 ​ $ 15,628
Summary of Performance-Based Restricted Share Units Activity and Related Information	A summary of activity related to performance-based restricted share units (“PSUs”) during the three-month period ended March 31, 2023, is presented below: ​ ​ ​ ​ ​ Unvested Shares Outstanding at December 31, 2022 341,850 Granted 105,581 Vested and issued (140,498) Outstanding at March 31, 2023 306,933	A summary of activity related to PSUs during the year ended December 31, 2022, is presented below: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted-Average ​ ​ ​ ​ Grant Date Fair ​ Unvested Shares ​ Value Per Share Outstanding at December 31, 2021 392,043 ​ $ 91.63 Granted 95,038 ​ $ 117.94 Forfeited (87,554) ​ $ 80.70 Vested and issued (57,677) ​ $ 81.04 Outstanding at December 31, 2022 341,850 ​ $ 103.53
Deferred Share Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted Stock Units Activity		A summary of the Company’s deferred share units (“DSUs”) activity is presented below: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ 2022 ​ 2021 2020 Weighted average grant-date fair value of DSUs granted ​ $ 121.00 ​ $ 99.80 ​ $ 103.81 Total fair value of DSUs awarded ​ $ 253 ​ $ 285 ​ $ 272
Summary of Activity Related to Restricted Share Units	A summary of activity related to deferred share units (“DSUs”) during the three-month period ended March 31, 2023, is presented below: ​ ​ ​ ​ ​ Vested Shares Outstanding at December 31, 2022 26,536 Granted 3,945 Outstanding at March 31, 2023 30,481	A summary of activity related to DSUs during the year ended December 31, 2022, is presented below: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted-Average ​ ​ ​ ​ Grant Date Fair ​ Vested Shares ​ Value Per Share Outstanding at December 31, 2021 24,442 ​ $ 64.05 Granted 2,094 ​ $ 121.00 Outstanding at December 31, 2022 26,536 ​ $ 68.55
Progressive Waste Solutions Ltd. [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Summary of Stock Option Activity and Related Information	​ ​ ​ ​ Outstanding at December 31, 2022 43,570 Cash settled — Outstanding at March 31, 2023 43,570	​ ​ ​ ​ Outstanding at December 31, 2021 45,869 Cash settled (2,299) Outstanding at December 31, 2022 43,570
Progressive Waste Solutions Ltd. [Member] | Restricted Stock Units (RSUs) [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Summary of Activity Related to Restricted Share Units	​ ​ ​ ​ Outstanding at December 31, 2022 57,829 Cash settled (5,803) Outstanding at March 31, 2023 52,026	​ ​ ​ ​ Outstanding at December 31, 2021 63,032 Cash settled (5,203) Outstanding at December 31, 2022 57,829

Other Comprehensive Income (L_6

Other Comprehensive Income (Loss) (Tables)	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Other Comprehensive Income (Loss) [Abstract]
Components of Other Comprehensive Income (Loss)	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 31, 2023 ​ Gross Tax Effect Net of Tax Interest rate swap amounts reclassified into interest expense ​ $ (4,080) ​ ​ 1,081 ​ $ (2,999) Changes in fair value of interest rate swaps ​ (3,299) ​ ​ 874 ​ (2,425) Foreign currency translation adjustment ​ 1,682 ​ — ​ 1,682 ​ ​ $ (5,697) ​ $ 1,955 ​ $ (3,742) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 31, 2022 ​ Gross Tax Effect Net of Tax Interest rate swap amounts reclassified into interest expense ​ $ 4,750 ​ $ (1,259) ​ $ 3,491 Changes in fair value of interest rate swaps ​ 44,699 ​ (11,845) ​ 32,854 Foreign currency translation adjustment ​ 34,429 ​ — ​ 34,429 ​ ​ $ 83,878 ​ $ (13,104) ​ $ 70,774	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, 2022 ​ Gross Tax Effect Net of Tax Interest rate swap amounts reclassified into interest expense ​ $ 6,551 ​ $ (1,736) ​ $ 4,815 Changes in fair value of interest rate swaps ​ 76,336 ​ (20,229) ​ 56,107 Foreign currency translation adjustment ​ (157,336) ​ — ​ (157,336) ​ ​ $ (74,449) ​ $ (21,965) ​ $ (96,414) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, 2021 ​ Gross Tax Effect Net of Tax Interest rate swap amounts reclassified into interest expense ​ $ 20,321 ​ $ (5,385) ​ $ 14,936 Changes in fair value of interest rate swaps ​ 23,287 ​ (6,171) ​ 17,116 Foreign currency translation adjustment ​ 8,183 ​ — ​ 8,183 ​ ​ $ 51,791 ​ $ (11,556) ​ $ 40,235 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, 2020 ​ Gross Tax Effect Net of Tax Interest rate swap amounts reclassified into interest expense ​ $ 9,778 ​ $ (2,591) ​ $ 7,187 Changes in fair value of interest rate swaps ​ (64,664) ​ 17,136 ​ (47,528) Foreign currency translation adjustment ​ ​ 50,653 ​ ​ — ​ ​ 50,653 ​ ​ $ (4,233) ​ $ 14,545 ​ $ 10,312
Amounts Included in Accumulated Other Comprehensive Income (Loss)	A rollforward of the amounts included in AOCIL, net of taxes, for the three months ended March 31, 2023 and 2022, is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Foreign Accumulated ​ ​ ​ ​ ​ Currency ​ Other ​ ​ Interest ​ Translation ​ Comprehensive ​ ​ Rate Swaps ​ Adjustment ​ Income (Loss) Balance at December 31, 2022 ​ $ 23,378 ​ $ (80,208) ​ $ (56,830) Amounts reclassified into earnings ​ ​ (2,999) ​ ​ — ​ ​ (2,999) Changes in fair value ​ ​ (2,425) ​ ​ — ​ ​ (2,425) Foreign currency translation adjustment ​ ​ — ​ ​ 1,682 ​ ​ 1,682 Balance at March 31, 2023 ​ $ 17,954 ​ $ (78,526) ​ $ (60,572) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Foreign Accumulated ​ ​ ​ ​ ​ Currency ​ Other ​ ​ Interest ​ Translation ​ Comprehensive ​ ​ Rate Swaps ​ Adjustment ​ Income (Loss) Balance at December 31, 2021 ​ $ (37,544) ​ $ 77,128 ​ $ 39,584 Amounts reclassified into earnings ​ 3,491 ​ — ​ 3,491 Changes in fair value ​ 32,854 ​ — ​ 32,854 Foreign currency translation adjustment ​ — ​ 34,429 ​ 34,429 Balance at March 31, 2022 ​ $ (1,199) ​ $ 111,557 ​ $ 110,358	A roll forward of the amounts included in AOCIL, net of taxes, is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Foreign Accumulated ​ ​ ​ ​ ​ Currency ​ Other ​ ​ Interest ​ Translation ​ Comprehensive ​ ​ Rate Swaps ​ Adjustment ​ Income (Loss) Balance at December 31, 2020 ​ $ (69,596) ​ $ 68,945 ​ $ (651) Amounts reclassified into earnings ​ 14,936 ​ — ​ 14,936 Changes in fair value ​ 17,116 ​ — ​ 17,116 Foreign currency translation adjustment ​ — ​ 8,183 ​ 8,183 Balance at December 31, 2021 ​ ​ (37,544) ​ ​ 77,128 ​ ​ 39,584 Amounts reclassified into earnings ​ ​ 4,815 ​ ​ — ​ ​ 4,815 Changes in fair value ​ ​ 56,107 ​ ​ — ​ ​ 56,107 Foreign currency translation adjustment ​ ​ — ​ ​ (157,336) ​ ​ (157,336) Balance at December 31, 2022 ​ $ 23,378 ​ $ (80,208) ​ $ (56,830)

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2022
Income Taxes [Abstract]
Income (Loss) Before Provision (Benefit) for Income Taxes	Income before provision for income taxes consists of the following: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ 2022 2021 2020 U.S. ​ $ 734,126 ​ $ 574,737 ​ $ 22,349 Non – U.S. ​ 314,837 ​ 196,005 ​ 231,565 Income before income taxes ​ $ 1,048,963 ​ $ 770,742 ​ $ 253,914
Provision (Benefit) for Income Taxes	The provision for income taxes consists of the following: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ 2022 2021 2020 Current: ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Federal ​ $ 59,675 ​ $ 71,180 ​ $ 65,143 State ​ 28,770 ​ 34,439 ​ 28,325 Non – U.S. ​ 31,036 ​ 32,071 ​ 6,941 ​ ​ 119,481 ​ 137,690 ​ 100,409 Deferred: ​ ​ ​ U.S. Federal ​ 95,397 ​ 51,534 ​ (36,659) State ​ 16,840 ​ 5,093 ​ (8,762) Non – U.S. ​ (18,756) ​ (42,064) ​ (5,066) ​ ​ 93,481 ​ 14,563 ​ (50,487) Provision for income taxes ​ $ 212,962 ​ $ 152,253 ​ $ 49,922
Significant Components of Deferred Income Tax Assets and Liabilities	The significant components of deferred income tax assets and liabilities, reduced by valuation allowances as applicable, are presented below: ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ ​ 2022 2021 Deferred income tax assets: ​ ​ Accrued expenses ​ $ 33,680 ​ $ 31,840 Compensation ​ 23,194 ​ 22,545 Contingent liabilities ​ 19,966 ​ 21,268 Tax credits and loss carryforwards ​ 33,019 ​ 24,415 Interest rate swaps ​ — ​ 13,536 Finance costs ​ 13,856 ​ 24,264 Gross deferred income tax assets ​ 123,715 ​ 137,868 Less: Valuation allowance ​ — ​ — Total deferred income tax assets ​ 123,715 ​ 137,868 ​ ​ ​ ​ ​ ​ ​ Deferred income tax liabilities: ​ ​ ​ ​ ​ ​ Goodwill and other intangibles ​ (434,500) ​ (397,855) Property and equipment ​ (579,615) ​ (484,519) Landfill closure and post-closure ​ (22,745) ​ (18,597) Prepaid expenses ​ (15,088) ​ (11,534) Investment in subsidiaries ​ (69,257) ​ (69,286) Interest rate swaps ​ (8,429) ​ — Other ​ ​ (7,823) ​ ​ (6,998) Total deferred income tax liabilities ​ (1,137,457) ​ (988,789) Net deferred income tax liability ​ $ (1,013,742) ​ $ (850,921)
Differences between Income Tax Provision in Statements of Net Income and Income Tax Provision Computed at Federal Statutory Rate	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ 2022 2021 2020 U.S. federal statutory rate ​ 21.0 % 21.0 % 21.0 % State taxes, net of federal benefit 4.2 4.7 4.5 ​ Deferred income tax liability adjustments — 0.3 1.6 ​ Effect of international operations (4.0) (6.3) (7.0) ​ Other (0.9) 0.1 (0.4) ​ ​ 20.3 % 19.8 % 19.7 %

Segment Reporting (Tables)_2

Segment Reporting (Tables)	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Segment Reporting [Abstract]
Summary of Financial Information Concerning Company's Reportable Segments	Summarized financial information concerning the Company’s reportable segments for the three months ended March 31, 2023 and 2022, is shown in the following tables: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ Intercompany Reported Segment March 31, 2023 ​ Revenue ​ Revenue (b) ​ Revenue ​ EBITDA (c) Southern ​ $ 451,000 ​ $ (51,107) ​ $ 399,893 ​ $ 121,914 Western ​ 444,796 ​ (48,957) ​ 395,839 ​ 110,689 Central ​ 383,525 ​ (43,540) ​ 339,985 ​ 115,756 Eastern ​ ​ 388,797 ​ ​ (59,669) ​ ​ 329,128 ​ ​ 73,275 Canada ​ 253,670 ​ (26,514) ​ 227,156 ​ 82,984 MidSouth ​ 251,085 ​ (42,583) ​ 208,502 ​ 57,731 Corporate (a) ​ — ​ — ​ — ​ (2,454) ​ ​ $ 2,172,873 ​ $ (272,370) ​ $ 1,900,503 ​ $ 559,895 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ Intercompany Reported Segment March 31, 2022 ​ Revenue ​ Revenue (b) ​ Revenue ​ EBITDA (c) Southern ​ $ 385,636 ​ $ (39,570) ​ $ 346,066 ​ $ 101,124 Western ​ 376,538 ​ (42,879) ​ 333,659 ​ 100,000 Central ​ 322,998 ​ (32,936) ​ 290,062 ​ 96,951 Eastern ​ ​ 315,967 ​ ​ (45,165) ​ ​ 270,802 ​ ​ 65,287 Canada ​ 240,215 ​ (25,508) ​ 214,707 ​ 84,844 MidSouth ​ 228,162 ​ (37,203) ​ 190,959 ​ 49,819 Corporate (a) ​ — ​ — ​ — ​ (4,702) ​ ​ $ 1,869,516 ​ $ (223,261) ​ $ 1,646,255 ​ $ 493,323 ____________________ (a) The majority of Corporate expenses are allocated to the six operating segments. Direct acquisition expenses, expenses associated with common shares held in the deferred compensation plan exchanged for other investment options and share-based compensation expenses associated with Progressive Waste share-based grants outstanding at June 1, 2016 that were continued by the Company are not allocated to the six operating segments and comprise the net EBITDA of the Company’s Corporate segment for the periods presented. (b) Intercompany revenues reflect each segment’s total intercompany sales, including intercompany sales within a segment and between segments. Transactions within and between segments are generally made on a basis intended to reflect the market value of the service. (c) For those items included in the determination of segment EBITDA, the accounting policies of the segments are the same as those described in the Company’s most recent Annual Report on Form 10-K.	Summarized financial information concerning the Company’s reportable segments for the years ended December 31, 2022, 2021 and 2020, is shown in the following tables: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended ​ ​ ​ ​ Intercompany ​ Reported ​ Segment ​ Depreciation and ​ Capital ​ ​ ​ December 31, 2022 Revenue Revenue (b) Revenue EBITDA (c) Amortization Expenditures Total Assets (e) Southern ​ $ 1,670,864 ​ $ (176,425) ​ $ 1,494,439 ​ $ 466,519 ​ $ 175,614 ​ $ 151,093 ​ $ 3,410,888 Western ​ 1,605,574 ​ (177,543) ​ 1,428,031 ​ 424,935 ​ 155,882 ​ 232,714 ​ 3,239,679 Central ​ 1,447,703 ​ (159,355) ​ 1,288,348 ​ 446,315 ​ 156,895 ​ 181,065 ​ 2,803,853 Eastern ​ ​ 1,445,193 ​ ​ (211,498) ​ ​ 1,233,695 ​ ​ 281,522 ​ ​ 190,480 ​ ​ 138,028 ​ ​ 2,752,436 Canada ​ 1,047,672 ​ (107,048) ​ 940,624 ​ 349,403 ​ 118,388 ​ 70,051 ​ 2,773,882 MidSouth ​ 992,922 ​ (166,200) ​ 826,722 ​ 235,705 ​ 112,866 ​ 133,849 ​ 1,727,323 Corporate (a), (d) ​ — ​ — ​ — ​ (25,019) ​ 8,835 ​ 5,877 ​ 426,542 ​ ​ $ 8,209,928 ​ $ (998,069) ​ $ 7,211,859 ​ $ 2,179,380 ​ $ 918,960 ​ $ 912,677 ​ $ 17,134,603 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended ​ ​ ​ ​ Intercompany ​ Reported ​ Segment ​ Depreciation and ​ Capital ​ ​ ​ December 31, 2021 Revenue Revenue (b) Revenue EBITDA (c) Amortization Expenditures Total Assets (e) Southern ​ $ 1,493,588 ​ $ (172,526) ​ $ 1,321,062 ​ $ 369,221 ​ $ 173,235 ​ $ 139,258 ​ $ 3,154,940 Western ​ 1,383,124 ​ (154,498) ​ 1,228,626 ​ 386,513 ​ 126,192 ​ 147,556 ​ 2,168,804 Central ​ 1,243,666 ​ (142,261) ​ 1,101,405 ​ 379,644 ​ 138,683 ​ 149,360 ​ 2,429,811 Eastern ​ 1,111,546 ​ ​ (155,836) ​ ​ 955,710 ​ ​ 245,091 ​ ​ 156,499 ​ ​ 90,212 ​ ​ 2,314,663 Canada ​ 965,705 ​ (108,982) ​ 856,723 ​ 339,859 ​ 111,458 ​ 68,183 ​ 2,513,608 MidSouth ​ 832,386 ​ (144,551) ​ ​ 687,835 ​ ​ 184,218 ​ 97,564 ​ 101,098 ​ 1,690,234 Corporate (a), (d) ​ — ​ — ​ — ​ (19,596) ​ 9,378 ​ 48,648 ​ 427,864 ​ ​ $ 7,030,015 ​ $ (878,654) ​ $ 6,151,361 ​ $ 1,884,950 ​ $ 813,009 ​ $ 744,315 ​ $ 14,699,924 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended ​ ​ ​ ​ Intercompany ​ Reported ​ Segment ​ Depreciation and ​ Capital ​ ​ ​ December 31, 2020 Revenue Revenue (b) Revenue EBITDA (c) Amortization Expenditures Total Assets (e) Southern ​ $ 1,419,987 ​ $ (169,817) ​ $ 1,250,170 ​ $ 343,181 ​ $ 173,885 ​ $ 125,972 ​ $ 3,193,211 Western ​ 1,244,745 ​ (141,993) ​ 1,102,752 ​ 346,585 ​ 111,515 ​ 126,370 ​ 1,770,403 Central ​ 1,058,909 ​ (127,885) ​ 931,024 ​ 332,321 ​ 117,499 ​ 109,013 ​ 2,256,992 Eastern ​ 969,011 ​ ​ (142,927) ​ ​ 826,084 ​ ​ 196,068 ​ ​ 143,744 ​ ​ 111,912 ​ ​ 1,908,333 Canada ​ 805,757 ​ (95,297) ​ 710,460 ​ 256,119 ​ 103,334 ​ 109,886 ​ 2,544,379 MidSouth ​ 761,978 ​ (136,478) ​ ​ 625,500 ​ ​ 172,559 ​ 94,172 ​ 75,661 ​ 1,428,929 Corporate (a), (d) ​ — ​ — ​ — ​ (15,283) ​ 8,255 ​ 5,747 ​ 890,117 ​ ​ $ 6,260,387 ​ $ (814,397) ​ $ 5,445,990 ​ $ 1,631,550 ​ $ 752,404 ​ $ 664,561 ​ $ 13,992,364 (a) The majority of Corporate expenses are allocated to the six operating segments. Direct acquisition expenses, expenses associated with common shares held in the deferred compensation plan exchanged for other investment options and share-based compensation expenses associated with Progressive Waste share-based grants outstanding at June 1, 2016 that were continued by the Company are not allocated to the six operating segments and comprise the net EBITDA of the Company’s Corporate segment for the periods presented. (b) Intercompany revenues reflect each segment’s total intercompany sales, including intercompany sales within a segment and between segments. Transactions within and between segments are generally made on a basis intended to reflect the market value of the service. (c) For those items included in the determination of segment EBITDA, the accounting policies of the segments are the same as those described in Note 3. (d) Corporate assets include cash, debt issuance costs, equity investments, operating lease right-of-use assets and corporate facility leasehold improvements and equipment. (e) Goodwill is included within total assets for each of the Company’s six operating segments.
Changes in Goodwill by Reportable Segment	The following tables show changes in goodwill during the three months ended March 31, 2023 and 2022, by reportable segment: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Southern Western Central Eastern Canada MidSouth Total Balance as of December 31, 2022 ​ $ 1,547,894 ​ $ 732,335 ​ $ 1,003,470 ​ $ 1,189,111 ​ $ 1,684,670 ​ $ 744,817 ​ $ 6,902,297 Goodwill acquired ​ ​ — ​ ​ 30,703 ​ ​ 397 ​ 3,440 ​ ​ — ​ ​ 3,249 ​ 37,789 Goodwill acquisition adjustments ​ ​ (647) ​ ​ — ​ ​ — ​ ​ — ​ ​ (289) ​ ​ — ​ ​ (936) Impact of changes in foreign currency ​ — ​ — ​ — ​ — ​ 1,417 ​ — ​ 1,417 Balance as of March 31, 2023 ​ $ 1,547,247 ​ $ 763,038 ​ $ 1,003,867 ​ $ 1,192,551 ​ $ 1,685,798 ​ $ 748,066 ​ $ 6,940,567 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Southern Western Central Eastern Canada MidSouth Total Balance as of December 31, 2021 ​ $ 1,457,437 ​ $ 503,223 ​ $ 931,269 ​ $ 992,578 ​ $ 1,559,512 ​ $ 743,624 ​ $ 6,187,643 Goodwill acquired ​ ​ — ​ ​ — ​ ​ 2,794 ​ 85,866 ​ ​ 123,384 ​ — ​ 212,044 Goodwill acquisition adjustments ​ ​ — ​ ​ 2,652 ​ ​ — ​ ​ — ​ ​ — ​ ​ (95) ​ ​ 2,557 Impact of changes in foreign currency ​ — ​ — ​ — ​ — ​ ​ 25,519 ​ — ​ 25,519 Balance as of March 31, 2022 ​ $ 1,457,437 ​ $ 505,875 ​ $ 934,063 ​ $ 1,078,444 ​ $ 1,708,415 ​ $ 743,529 ​ $ 6,427,763	The following table shows changes in goodwill during the years ended December 31, 2021 and 2022, by reportable segment: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Southern Western Central Eastern Canada MidSouth Total Balance as of December 31, 2020 ​ $ 1,532,215 ​ $ 442,862 ​ $ 824,204 ​ $ 1,374,577 ​ $ 1,552,792 ​ $ — ​ $ 5,726,650 Goodwill transferred (a) ​ ​ (77,430) ​ ​ (36,486) ​ ​ 39,037 ​ ​ (557,353) ​ ​ — ​ ​ 632,232 ​ ​ — Goodwill acquired ​ 2,976 ​ 96,847 ​ 68,028 ​ 175,354 ​ — ​ 111,392 ​ 454,597 Goodwill acquisition adjustments ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ (2) ​ ​ — ​ ​ (2) Goodwill divested ​ ​ (324) ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ (324) Impact of changes in foreign currency ​ — ​ — ​ — ​ — ​ 6,722 ​ — ​ 6,722 Balance as of December 31, 2021 ​ ​ 1,457,437 ​ ​ 503,223 ​ ​ 931,269 ​ ​ 992,578 ​ ​ 1,559,512 ​ ​ 743,624 ​ ​ 6,187,643 Goodwill acquired ​ ​ 90,457 ​ ​ 229,112 ​ ​ 72,201 ​ 196,533 ​ ​ 235,095 ​ ​ 1,193 ​ 824,591 Impact of changes in foreign currency ​ — ​ — ​ — ​ — ​ (109,937) ​ — ​ (109,937) Balance as of December 31, 2022 ​ $ 1,547,894 ​ $ 732,335 ​ $ 1,003,470 ​ $ 1,189,111 ​ $ 1,684,670 ​ $ 744,817 ​ $ 6,902,297
Total Assets for Reportable Segments		Property and equipment, net relating to operations in the United States and Canada are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2022 2021 United States ​ $ 6,201,011 ​ $ 5,075,184 Canada ​ 749,904 ​ 646,765 Total ​ $ 6,950,915 ​ $ 5,721,949
Reconciliation of Primary Measure of Segment Profitability to Income Before Income Tax Provision	A reconciliation of the Company’s primary measure of segment profitability (segment EBITDA) to Income before income tax provision in the Condensed Consolidated Statements of Net Income is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ March 31, ​ 2023 2022 Southern segment EBITDA ​ $ 121,914 ​ $ 101,124 Western segment EBITDA ​ ​ 110,689 ​ ​ 100,000 Central segment EBITDA ​ ​ 115,756 ​ ​ 96,951 Eastern segment EBITDA ​ ​ 73,275 ​ ​ 65,287 Canada segment EBITDA ​ ​ 82,984 ​ ​ 84,844 MidSouth segment EBITDA ​ 57,731 ​ 49,819 Subtotal reportable segments ​ 562,349 ​ 498,025 Unallocated corporate overhead ​ ​ (2,454) ​ ​ (4,702) Depreciation ​ ​ (204,059) ​ ​ (179,950) Amortization of intangibles ​ ​ (39,282) ​ ​ (37,635) Impairments and other operating items ​ ​ (1,865) ​ ​ (1,878) Interest expense ​ ​ (68,353) ​ ​ (41,324) Interest income ​ ​ 2,715 ​ ​ 137 Other income (expense), net ​ ​ 3,174 ​ ​ (3,466) Income before income tax provision ​ $ 252,225 ​ $ 229,207	A reconciliation of the Company’s primary measure of segment profitability (segment EBITDA) to Income before income tax provision in the Consolidated Statements of Net Income is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years ended December 31, ​ 2022 2021 2020 Southern segment EBITDA ​ $ 466,519 ​ $ 369,221 ​ $ 343,181 Western segment EBITDA ​ 424,935 ​ 386,513 ​ 346,585 Central segment EBITDA ​ 446,315 ​ 379,644 ​ 332,321 Eastern segment EBITDA ​ ​ 281,522 ​ ​ 245,091 ​ ​ 196,068 Canada segment EBITDA ​ 349,403 ​ 339,859 ​ 256,119 MidSouth segment EBITDA ​ 235,705 ​ 184,218 ​ 172,559 Subtotal reportable segments ​ 2,204,399 ​ 1,904,546 ​ 1,646,833 Unallocated corporate overhead ​ (25,019) ​ (19,596) ​ (15,283) Depreciation ​ (763,285) ​ (673,730) ​ (621,102) Amortization of intangibles ​ (155,675) ​ (139,279) ​ (131,302) Impairments and other operating items ​ (18,230) ​ (32,316) ​ (466,718) Interest expense ​ (202,331) ​ (162,796) ​ (162,375) Interest income ​ 5,950 ​ 2,916 ​ 5,253 Other income (expense), net ​ 3,154 ​ 6,285 ​ (1,392) Loss on early extinguishment of debt ​ ​ — ​ ​ (115,288) ​ ​ — Income before income tax provision ​ $ 1,048,963 ​ $ 770,742 ​ $ 253,914

Net Income Per Share Informat_5

Net Income Per Share Information (Tables)	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Net Income Per Share Information [Abstract]
Basic and Diluted Net Income Per Common Share	The following table sets forth the calculation of the numerator and denominator used in the computation of basic and diluted net income per common share attributable to the Company’s shareholders for the three months ended March 31, 2023 and 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ ​ March 31, ​ ​ 2023 2022 Numerator: ​ ​ ​ ​ ​ ​ ​ Net income attributable to Waste Connections for basic and diluted earnings per share ​ $ 197,813 ​ $ 180,324 ​ Denominator: ​ ​ ​ ​ ​ Basic shares outstanding ​ ​ 257,372,942 ​ ​ 258,946,933 ​ Dilutive effect of equity-based awards ​ ​ 616,029 ​ ​ 614,050 ​ Diluted shares outstanding ​ 257,988,971 ​ 259,560,983 ​	The following table sets forth the calculation of the numerator and denominator used in the computation of basic and diluted net income per common share attributable to the Company’s shareholders for the years ended December 31, 2022, 2021 and 2020: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ 2022 2021 2020 Numerator: ​ ​ ​ ​ ​ ​ ​ ​ ​ Net income attributable to Waste Connections for basic and diluted earnings per share ​ $ 835,662 ​ $ 618,047 ​ $ 204,677 Denominator: ​ ​ ​ ​ ​ ​ Basic shares outstanding ​ 257,383,578 ​ 261,166,723 ​ 263,189,699 Dilutive effect of equity-based awards ​ 655,223 ​ 561,747 ​ 497,840 Diluted shares outstanding ​ 258,038,801 ​ 261,728,470 ​ 263,687,539

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2022
Employee Benefit Plans [Abstract]
Multiemployer Pension Plan	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Expiration ​ ​ EIN/Pension Plan ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Date of ​ ​ Number/ ​ Pension Protection Act ​ FIP/RP ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Collective ​ ​ Registration ​ Zone Status (a) ​ Status ​ Company Contributions (d) ​ Bargaining Plan Name Number 2022 2021 (b),(c) 2022 2021 2020 Agreement Western Conference of Teamsters Pension Trust 91-6145047 - 001 Green Green Not applicable ​ $ 5,803 ​ $ 4,963 ​ $ 4,841 4/30/2023 to 6/30/2027 Local 731, I.B. of T., Pension Fund 36-6513567 - 001 Green for the plan year beginning 10/1/2021 Green for the plan year beginning 10/1/2021 Not applicable ​ ​ 4,484 ​ ​ 4,504 ​ ​ 4,628 9/30/2023 Suburban Teamsters of Northern Illinois Pension Fund 36-6155778 - 001 Green Green Not applicable ​ 2,516 ​ 2,300 ​ 2,080 2/29/2024 Teamsters Local 301 Pension Fund 36-6492992 - 001 Green Green Not applicable ​ 1,310 ​ 841 ​ 673 9/30/2023 Midwest Operating Engineers Pension Plan 36-6140097 - 001 Green for the plan year beginning 4/1/2022 Green for the plan year beginning 4/1/2021 Not applicable ​ 542 ​ 424 ​ 316 10/31/2025 Automobile Mechanics’ Local No. 701 Union and Industry Pension Fund 36-6042061 - 001 Green Green Not applicable ​ 470 ​ 439 ​ 457 12/31/2022 Local 813 Pension Trust Fund 13-1975659 - 001 Critical Critical for the plan year beginning 1/1/2021 Implemented ​ 429 ​ 258 ​ 183 11/30/2027 Locals 302 & 612 of the IOUE - Employers Construction Industry Retirement Plan 91-6028571 - 001 Green Green Not applicable ​ 338 ​ 313 ​ 298 11/16/2022 IAM National Pension Fund ​ 51-6031295 - 002 ​ Critical ​ Critical ​ Implemented ​ ​ 342 ​ ​ 299 ​ ​ 310 ​ 12/31/2022 International Union of Operating Engineers Pension Trust 85512-1 Green as of 4/30/2020 Green as of 4/30/2020 Not applicable ​ 281 ​ 295 ​ 279 3/31/2024 Multi-Sector Pension Plan 1085653 Critical as of 1/1/2021 Critical as of 1/1/2021 Not applicable ​ 249 ​ 265 ​ 196 12/31/2023 Recycling and General Industrial Union Local 108 Pension Fund ​ 13-6366378 - 001 ​ Green ​ Green ​ Not applicable ​ ​ 230 ​ ​ 217 ​ ​ 269 ​ 2/28/2027 Nurses and Local 813 IBT Retirement Plan ​ 13-3628926 - 001 ​ Green ​ Green ​ Not applicable ​ ​ 97 ​ ​ 58 ​ ​ 52 ​ 11/30/2027 Contributions to other multiemployer plans ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 65 ​ ​ 75 ​ ​ 10 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ $ 17,156 ​ $ 15,251 ​ $ 14,592 ​ ​ ​ (a) Unless otherwise noted in the table above, the most recent Pension Protection Act zone status available in 2022 and 2021 is for the plans’ years ended December 31, 2021 and 2020, respectively. (b) The “FIP/RP Status” column indicates plans for which a Funding Improvement Plan (“FIP”) or a Rehabilitation Plan (“RP”) has been implemented. (c) A multiemployer defined benefit pension plan that has been certified as endangered, seriously endangered or critical may begin to levy a statutory surcharge on contribution rates. Once authorized, the surcharge is at the rate of 5% for the first 12 months and 10% for any periods thereafter, until certain conditions are met. The Company was not required to pay a surcharge to these plans during the years ended December 31, 2022 and 2021. (d) Of the Multiemployer Pension Plans considered to be individually significant, the Company was listed in the Form 5500 as providing more than 5% of the total contributions for the following: 1) Local No. 731, I.B. of T., Pension Fund for plan years ending September 30, 2021, 2020 and 2019; 2) Teamsters Local 301 Pension Fund for plan years ending December 31, 2021, 2020 and 2019; 3) Suburban Teamsters of Northern Illinois Pension Plan for the plan years ending December 31, 2021 and 2020; and 4) Recycling and General Industrial Union Local 108 Pension Fund for the plan years ending December 31, 2021, 2020 and 2019.

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Revenue and Accounts Receivable - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Organization And Summary Of Significant Accounting Policies [Line Items]
Weighted Average, Remaining Contract, Term		4 years
Capitalized contract costs	$ 23,818	$ 23,818	$ 18,954
Sales incentives amortization expense		$ 22,675	$ 23,671	$ 17,138
Minimum [Member]
Organization And Summary Of Significant Accounting Policies [Line Items]
Estimated life of relevant customer relationship	1 year	1 year
Maximum [Member]
Organization And Summary Of Significant Accounting Policies [Line Items]
Estimated life of relevant customer relationship	5 years	5 years
Landfill and Transfer Station [Member] | Minimum [Member]
Organization And Summary Of Significant Accounting Policies [Line Items]
Standard customer service agreement period		1 year
Landfill and Transfer Station [Member] | Maximum [Member]
Organization And Summary Of Significant Accounting Policies [Line Items]
Standard customer service agreement period		10 years
Collection [Member] | Minimum [Member]
Organization And Summary Of Significant Accounting Policies [Line Items]
Standard customer service agreement period		1 year
Collection [Member] | Maximum [Member]
Organization And Summary Of Significant Accounting Policies [Line Items]
Standard customer service agreement period		3 years

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Revenues by Service Line (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenue from External Customer [Line Items]
Revenues	$ 1,900,503	$ 1,646,255	$ 7,211,859	$ 6,151,361	$ 5,445,990
Reportable Segments [Member] | Collection [Member]
Revenue from External Customer [Line Items]
Revenues	1,434,647	1,199,452	5,251,027	4,441,426	3,971,678
Reportable Segments [Member] | Collection [Member] | Commercial [Member]
Revenue from External Customer [Line Items]
Revenues			2,176,295	1,813,426	1,610,313
Reportable Segments [Member] | Collection [Member] | Residential [Member]
Revenue from External Customer [Line Items]
Revenues			1,891,108	1,673,819	1,528,217
Reportable Segments [Member] | Collection [Member] | Industrial and Construction Roll Off [Member]
Revenue from External Customer [Line Items]
Revenues			1,183,624	954,181	833,148
Reportable Segments [Member] | Landfill [Member]
Revenue from External Customer [Line Items]
Revenues	343,433	299,765	1,328,942	1,233,499	1,146,732
Reportable Segments [Member] | Transfer [Member]
Revenue from External Customer [Line Items]
Revenues	273,521	217,957	1,026,050	859,113	777,754
Reportable Segments [Member] | Recycling [Member]
Revenue from External Customer [Line Items]
Revenues	31,301	63,094	204,876	205,076	86,389
Reportable Segments [Member] | Exploration And Production Waste Treatment Recovery And Disposal [Member]
Revenue from External Customer [Line Items]
Revenues	51,759	43,555	210,562	138,707	159,438
Reportable Segments [Member] | Intermodal and Other [Member]
Revenue from External Customer [Line Items]
Revenues	38,212	45,693	188,471	152,194	118,396
Intercompany Revenue [Member]
Revenue from External Customer [Line Items]
Revenues	$ (272,370)	$ (223,261)	$ (998,069)	$ (878,654)	$ (814,397)

Summary of Significant Accoun_6

Summary of Significant Accounting Policies - Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Basis of Presentation and Summary [Abstract]
Allowance for Credit Losses, Beginning Balance	$ 22,939	$ 18,480	$ 18,480	$ 19,380
Current period provision for expected credit losses	2,247	3,022	17,353	9,719	$ 15,509
Write-offs charged against the allowance	(5,017)	(3,435)	(18,273)	(15,545)
Recoveries collected	2,068	1,272	5,473	4,918
Impact of changes in foreign currency	(2)	(22)	(94)	8
Allowance for Credit Losses, Ending Balance	$ 22,239	$ 19,361	$ 22,939	$ 18,480	$ 19,380

Summary of Significant Accoun_7

Summary of Significant Accounting Policies - Property Plant and Equipment Estimated Useful Lives (Details)	12 Months Ended
	Dec. 31, 2022
Buildings [Member] | Minimum [Member]
Property Plant and Equipment Estimated Useful Lives [Line Items]
Useful life	10 years
Buildings [Member] | Maximum [Member]
Property Plant and Equipment Estimated Useful Lives [Line Items]
Useful life	20 years
Leasehold and Land Improvements [Member] | Minimum [Member]
Property Plant and Equipment Estimated Useful Lives [Line Items]
Useful life	3 years
Leasehold and Land Improvements [Member] | Maximum [Member]
Property Plant and Equipment Estimated Useful Lives [Line Items]
Useful life	10 years
Machinery and Equipment [Member] | Minimum [Member]
Property Plant and Equipment Estimated Useful Lives [Line Items]
Useful life	3 years
Machinery and Equipment [Member] | Maximum [Member]
Property Plant and Equipment Estimated Useful Lives [Line Items]
Useful life	12 years
Rolling Stock [Member] | Minimum [Member]
Property Plant and Equipment Estimated Useful Lives [Line Items]
Useful life	3 years
Rolling Stock [Member] | Maximum [Member]
Property Plant and Equipment Estimated Useful Lives [Line Items]
Useful life	10 years
Containers [Member] | Minimum [Member]
Property Plant and Equipment Estimated Useful Lives [Line Items]
Useful life	3 years
Containers [Member] | Maximum [Member]
Property Plant and Equipment Estimated Useful Lives [Line Items]
Useful life	12 years

Summary of Significant Accoun_8

Summary of Significant Accounting Policies - Landfill Accounting - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Organization And Summary Of Significant Accounting Policies [Line Items]
Life of Company's owned landfills and landfills operated under life-of-site operating agreements min range	2 years	1 year
Life of Company's owned landfills and landfills operated under life of site operating agreements max range	308 years	329 years
Percentage of projected annual disposal volume from landfills with remaining lives within threshold period	90%	90%
Threshold period used for measurement of projected annual disposal volume from landfills	70 years	70 years
Liability adjustments		$ 39,321	$ (1,081)
Liability adjustments	$ 14,704
Landfill [Member]
Organization And Summary Of Significant Accounting Policies [Line Items]
Inflation rate for purposes of computing layers for final capping, closure and post-closure obligations			2.25%
Landfill [Member] | Minimum [Member]
Organization And Summary Of Significant Accounting Policies [Line Items]
Inflation rate for purposes of computing layers for final capping, closure and post-closure obligations		2.25%
Landfill [Member] | Maximum [Member]
Organization And Summary Of Significant Accounting Policies [Line Items]
Inflation rate for purposes of computing layers for final capping, closure and post-closure obligations		2.75%
Landfill [Member] | Measurement Input, Discount Rate [Member]
Organization And Summary Of Significant Accounting Policies [Line Items]
Discount rate for purposes of computing layers for final capping, closure and post-closure obligations			3.25%
Landfill [Member] | Measurement Input, Discount Rate [Member] | Minimum [Member]
Organization And Summary Of Significant Accounting Policies [Line Items]
Discount rate for purposes of computing layers for final capping, closure and post-closure obligations		3.25%
Landfill [Member] | Measurement Input, Discount Rate [Member] | Maximum [Member]
Organization And Summary Of Significant Accounting Policies [Line Items]
Discount rate for purposes of computing layers for final capping, closure and post-closure obligations		5.50%

Summary of Significant Accoun_9

Summary of Significant Accounting Policies - Final Capping, Closure and Post-Closure Liability Rollforward (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Final capping, closure and post-closure liability at the beginning of the period	$ 344,606	$ 302,537	$ 302,537	$ 301,896
Liability adjustments			39,321	(1,081)
Liability adjustments	14,704
Accretion expense associated with landfill obligations	4,474	$ 4,050	16,068	14,333
Closure payments	(5,346)		(18,834)	(21,040)
Assumption of closure liabilities from acquisitions	3,443		8,575	11,380
Disposition of closure liabilities from divested operations			(916)	(3,566)
Foreign currency translation adjustment	(24)		(2,145)	615
Final capping, closure and post-closure liability at the end of the period	$ 361,905		$ 344,606	$ 302,537

Summary of Significant Accou_10

Summary of Significant Accounting Policies - Intangible Assets - Narrative (Details) $ in Thousands		3 Months Ended			6 Months Ended	12 Months Ended			36 Months Ended
	Apr. 01, 2023 segment	Mar. 31, 2023 USD ($) segment	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($) site	Jun. 30, 2020 USD ($)	Dec. 31, 2022 USD ($) segment site	Dec. 31, 2021 USD ($) segment	Dec. 31, 2020 USD ($) segment item	Dec. 31, 2022 USD ($) segment
Organization And Summary Of Significant Accounting Policies [Line Items]
Number of Reportable Segments | segment		6				6	6	6	6
Forecasts period used for discounted cash flow analyses						10 years
Perpetual revenue growth rate						4.50%
Market Participant Rate						7.90%			7.90%
Number of Reporting Units | segment						6	6	6
Impairment, Intangible Asset, Indefinite-Lived (Excluding Goodwill), Statement of Income or Comprehensive Income [Extensible Enumeration]						Impairments And Other Operating Charges	Impairments And Other Operating Charges	Impairments And Other Operating Charges
Number of operating segments | segment	6	6				6			6
Impairment, Long-Lived Asset, Held-for-Use, Statement of Income or Comprehensive Income [Extensible Enumeration]						Impairments And Other Operating Charges	Impairments And Other Operating Charges	Impairments And Other Operating Charges
Intangible assets		$ 1,697,193		$ 1,350,597		$ 1,673,917	$ 1,350,597		$ 1,673,917
Adjustments to contingent consideration		$ (637)	$ (52)			(1,030)	$ 2,954	$ 18,418
Exploration and Production [Member]
Organization And Summary Of Significant Accounting Policies [Line Items]
Adjustments to contingent consideration								$ 4,145
Exploration and Production [Member] | Valuation Technique, Discounted Cash Flow [Member]
Organization And Summary Of Significant Accounting Policies [Line Items]
Number of landfills impaired | item								4
Impairment of property and equipment								$ 417,384
Exploration and Production [Member] | Certain Basins [Member]
Organization And Summary Of Significant Accounting Policies [Line Items]
Percentage decline in revenue from prior year period								56%
Exploration and Production [Member] | Four Landfill [Member]
Organization And Summary Of Significant Accounting Policies [Line Items]
Impairment of property and equipment								$ 417,384
Intangible assets					$ 0
Impairment of intangible assets					$ 0
Exploration and Production [Member] | Four Landfill [Member] | Valuation Technique, Discounted Cash Flow [Member]
Organization And Summary Of Significant Accounting Policies [Line Items]
Impairment charge if estimated annual cash flows was changed by ten percent								$ 3,000
Exploration and Production [Member] | Four Landfill [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Expected Term [Member]
Organization And Summary Of Significant Accounting Policies [Line Items]
Useful life								40 years
Exploration and Production [Member] | Four Landfill [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Discount Rate [Member]
Organization And Summary Of Significant Accounting Policies [Line Items]
Derivative Asset (Liability) Net, Measurement Input								0.12
Exploration and Production and Sothern [Member]
Organization And Summary Of Significant Accounting Policies [Line Items]
Impairment of intangible assets				$ 2,277
Number of sites impaired | site				2
Impairment of property and equipment						16,379
Geographic Operating Segments [Member]
Organization And Summary Of Significant Accounting Policies [Line Items]
Impairment loss									$ 0
Impairment of intangible assets						$ 0		$ 0
Exploration And Production Waste Treatment Recovery And Disposal [Member]
Organization And Summary Of Significant Accounting Policies [Line Items]
Decline in revenue from prior year period								$ 112,114
Exploration And Production Waste Treatment Recovery And Disposal [Member] | Southern [Member]
Organization And Summary Of Significant Accounting Policies [Line Items]
Number of sites impaired | site						3
Minimum [Member]
Organization And Summary Of Significant Accounting Policies [Line Items]
Expected term of related agreements						1 year
Maximum [Member]
Organization And Summary Of Significant Accounting Policies [Line Items]
Expected term of related agreements						56 years

Summary of Significant Accou_11

Summary of Significant Accounting Policies - Restricted Cash and Investments (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Restricted cash	$ 106,625	$ 102,727	$ 72,174
Restricted investments	$ 74,358	68,099	59,014
Restricted Settlement of Insurance Claims [Member]
Restricted cash		88,360	52,906
Restricted Landfill Closure and Post-Closure Obligations [Member]
Restricted cash		6,890	12,609
Restricted investments		57,469	56,289
Restricted Other Financial Assurance Requirements [Member]
Restricted cash		7,477	6,659
Restricted investments		$ 10,630	$ 2,725

Summary of Significant Accou_12

Summary of Significant Accounting Policies - Carrying Values and Fair Values of Debt Instruments (Details) - Senior Notes [Member] - USD ($)	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Aug. 31, 2021	Apr. 01, 2021
Senior Notes due 2021 [Member]
Debt Instrument [Line Items]
Carrying value of senior notes					$ 100,000,000
New Senior Notes due 2021 [Member]
Debt Instrument [Line Items]
Carrying value of senior notes				$ 150,000,000
Senior Notes due 2022 [Member]
Debt Instrument [Line Items]
Carrying value of senior notes				125,000,000
Senior Notes due 2023 [Member]
Debt Instrument [Line Items]
Carrying value of senior notes				200,000,000
Senior Notes due 2024 [Member]
Debt Instrument [Line Items]
Carrying value of senior notes				150,000,000
Senior Notes due 2025 [Member]
Debt Instrument [Line Items]
Carrying value of senior notes				375,000,000
Senior Notes due 2026 [Member]
Debt Instrument [Line Items]
Carrying value of senior notes				400,000,000
Senior Notes due 2027 [Member]
Debt Instrument [Line Items]
Carrying value of senior notes				$ 250,000,000
Senior Notes due 2028 [Member]
Debt Instrument [Line Items]
Carrying value of senior notes	$ 500,000,000	$ 500,000,000	$ 500,000,000
Fair value of senior notes	$ 491,500,000	$ 470,850,000	$ 561,350,000
Interest rate of senior notes	4.25%	4.25%	4.25%
Senior Notes due 2029 [Member]
Debt Instrument [Line Items]
Carrying value of senior notes	$ 500,000,000	$ 500,000,000	$ 500,000,000
Fair value of senior notes	$ 466,350,000	$ 457,650,000	$ 539,500,000
Interest rate of senior notes	3.50%	3.50%	3.50%
Senior Notes due 2030
Debt Instrument [Line Items]
Carrying value of senior notes	$ 600,000,000	$ 600,000,000	$ 600,000,000
Fair value of senior notes	$ 525,060,000	$ 510,540,000	$ 610,440,000
Interest rate of senior notes	2.60%	2.60%	2.60%
Senior Notes due 2032 [Member]
Debt Instrument [Line Items]
Carrying value of senior notes	$ 650,000,000	$ 650,000,000	$ 650,000,000
Fair value of senior notes	$ 529,490,000	$ 514,540,000	637,065,000
Interest rate of senior notes	2.20%	2.20%
New Senior Notes due 2032 [Member]
Debt Instrument [Line Items]
Carrying value of senior notes	$ 500,000,000	$ 500,000,000	0
Fair value of senior notes	$ 444,800,000	$ 429,000,000	0
Interest rate of senior notes	3.20%	3.20%
Senior Notes due 2033 [Member]
Debt Instrument [Line Items]
Carrying value of senior notes	$ 750,000,000	$ 750,000,000	0
Fair value of senior notes	$ 718,275,000	$ 699,450,000	0
Interest rate of senior notes	4.20%	4.20%
Senior Notes due 2050
Debt Instrument [Line Items]
Carrying value of senior notes	$ 500,000,000	$ 500,000,000	500,000,000
Fair value of senior notes	$ 341,300,000	$ 343,300,000	$ 496,350,000
Interest rate of senior notes	3.05%	3.05%	3.05%
Senior Notes due 2052
Debt Instrument [Line Items]
Carrying value of senior notes	$ 850,000,000	$ 850,000,000	$ 850,000,000
Fair value of senior notes	$ 570,435,000	$ 561,425,000	$ 828,580,000
Interest rate of senior notes	2.95%	2.95%	2.95%

Summary of Significant Accou_13

Summary of Significant Accounting Policies - Derivative Financial Instruments - Narrative (Details) $ in Thousands	Mar. 31, 2023 agreement	Dec. 31, 2022 agreement	Sep. 28, 2020 USD ($) item
Derivative [Line Items]
Number of interest rate swap agreements | agreement	4	5
Interest Rate Swap [Member]
Derivative [Line Items]
Number of derivatives terminated | item			4
Payments to terminate derivative			$ 853
Interest Rate Swap Terminated [Member]
Derivative [Line Items]
Notional amount			$ 400,000

Summary of Significant Accou_14

Summary of Significant Accounting Policies - Derivative Financial Instruments - Interest Rate Swaps (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2023 USD ($) agreement	Dec. 31, 2022 USD ($) agreement
Derivative [Line Items]
Number of interest rate swap agreements | agreement	4	5
Interest Rate Swap One [Member]
Derivative [Line Items]
Date entered	2017-08	2017-08
Notional amount	$ 200,000	$ 200,000
Fixed interest rate paid	2.123%	2.123%
Variable interest rate received	1-month Term SOFR	1-month Term SOFR
Effective date	2022-11	2022-11
Expiration date	2025-10	2025-10
Interest Rate Swap Two [Member]
Derivative [Line Items]
Date entered	2018-06	2017-08
Notional amount	$ 200,000	$ 150,000
Fixed interest rate paid	2.848%	1.772%
Variable interest rate received	1-month Term SOFR	1-month Term SOFR
Effective date	2022-11	2022-11
Expiration date	2025-10	2023-02
Interest Rate Swap Three [Member]
Derivative [Line Items]
Date entered	2018-06	2018-06
Notional amount	$ 200,000	$ 200,000
Fixed interest rate paid	2.8284%	2.848%
Variable interest rate received	1-month Term SOFR	1-month Term SOFR
Effective date	2022-11	2022-11
Expiration date	2025-10	2025-10
Interest Rate Swap Four [Member]
Derivative [Line Items]
Date entered	2018-12	2018-06
Notional amount	$ 200,000	$ 200,000
Fixed interest rate paid	2.7715%	2.8284%
Variable interest rate received	1-month Term SOFR	1-month Term SOFR
Effective date	2022-11	2022-11
Expiration date	2027-07	2025-10
Interest Rate Swap Five [Member]
Derivative [Line Items]
Date entered		2018-12
Notional amount		$ 200,000
Fixed interest rate paid		2.7715%
Variable interest rate received		1-month Term SOFR
Effective date		2022-11
Expiration date		2027-07

Summary of Significant Accou_15

Summary of Significant Accounting Policies - Derivative Financial Instruments - FV of Cash Flow Hedges (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Derivatives, Fair Value [Line Items]
Derivatives designated as cash flow hedges, asset derivatives	$ 24,427	$ 31,807
Derivatives designated as cash flow hedges, liability derivatives			$ (51,081)
Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Derivatives designated as cash flow hedges, asset derivatives		17,906	0
Derivatives designated as cash flow hedges, liability derivatives			(18,675)
Interest Rate Swap [Member] | Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivatives designated as cash flow hedges, liability derivatives			(18,675)
Interest Rate Swap [Member] | Other Non-Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivatives designated as cash flow hedges, liability derivatives			$ (32,406)
Interest Rate Swap [Member] | Prepaid Expenses and Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivatives designated as cash flow hedges, asset derivatives	14,872	17,906
Interest Rate Swap [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Derivatives designated as cash flow hedges, asset derivatives	$ 9,555	$ 13,901

Summary of Significant Accou_16

Summary of Significant Accounting Policies - Impact of CF Hedges on Operations, Comp Income and AOCIL (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized as AOCIL on Derivatives, Net of Tax	$ (2,425)	$ 32,854	$ 56,107	$ 17,116	$ (47,528)
Amount of Gain or (Loss) Recognized from AOCIL into Earnings, Net of Tax	2,999	(3,491)	(4,815)	(14,936)	(7,187)
Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized as AOCIL on Derivatives, Net of Tax	(2,425)	32,854	56,107	17,116	(47,528)
Amount of Gain or (Loss) Recognized from AOCIL into Earnings, Net of Tax	2,999	(3,491)	4,815	14,936	7,187
Cash Flow Hedging [Member] | Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized as AOCIL on Derivatives, Net of Tax	(2,425)	(32,854)	56,107	17,116	(47,528)
Cash Flow Hedging [Member] | Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized from AOCIL into Earnings, Net of Tax	$ 2,999	$ (3,491)	$ 4,815	$ 14,936	$ 7,187

Summary of Significant Accou_17

Summary of Significant Accounting Policies - Share-Based Compensation - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Organization And Summary Of Significant Accounting Policies [Line Items]
Contractual life of warrants			5 years
Share-based compensation expense, gross	$ 18,469	$ 14,635	$ 63,485	$ 58,221	$ 45,751
Share-based compensation expense, net of taxes			47,503	43,495	34,197
Restricted Stock Units (RSUs) [Member]
Organization And Summary Of Significant Accounting Policies [Line Items]
Unrecognized compensation cost related to unvested awards			$ 73,304
Restricted stock unit awards, vesting final year			2027
Weighted average remaining vesting period			1 year 4 months 24 days
Restricted Stock Units (RSUs) [Member] | Progressive Waste Plans [Member]
Organization And Summary Of Significant Accounting Policies [Line Items]
Share-based compensation liability			$ 8,042	9,008	7,237
Performance Shares [Member]
Organization And Summary Of Significant Accounting Policies [Line Items]
Unrecognized compensation cost related to unvested awards			$ 18,194
Restricted stock unit awards, vesting final year			2025
Weighted average remaining vesting period			1 year 1 month 6 days
Employee Stock Option [Member] | Progressive Waste Plans [Member]
Organization And Summary Of Significant Accounting Policies [Line Items]
Share-based compensation liability			$ 3,814	$ 4,088	$ 3,556
Employee Share Purchase Plan 2020 [Member] | Minimum [Member]
Organization And Summary Of Significant Accounting Policies [Line Items]
Exercise price percentage of closing price of common shares	85%		85%
Employee Share Purchase Plan 2020 [Member] | Maximum [Member]
Organization And Summary Of Significant Accounting Policies [Line Items]
Exercise price percentage of closing price of common shares	95%		95%

Summary of Significant Accou_18

Summary of Significant Accounting Policies - Advertising Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Advertising costs	$ 8,335	$ 7,155	$ 4,870

Summary of Significant Accou_19

Summary of Significant Accounting Policies - Insurance Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accrual for self insured liabilities	$ 151,379	$ 147,757
Self-insurance expense	$ 204,347	$ 179,250	$ 164,099

Prepaid Expenses and Other Cu_3

Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Prepaid Expenses And Other Current Assets [Line Items]
Income taxes receivable		$ 43,055	$ 61,305
Inventory		55,188	44,257
Prepaid insurance		31,588	22,471
Unrealized cash flow hedge gains	$ 24,427	31,807
Prepaid licenses and permits		12,116	10,683
Other		45,293	37,006
Total prepaid expenses and other current assets	185,718	205,146	175,722
Interest Rate Swap [Member]
Prepaid Expenses And Other Current Assets [Line Items]
Unrealized cash flow hedge gains		17,906	$ 0
Interest Rate Swap [Member] | Prepaid Expenses and Other Current Assets [Member]
Prepaid Expenses And Other Current Assets [Line Items]
Unrealized cash flow hedge gains	14,872	17,906
Interest Rate Swap [Member] | Other Assets [Member]
Prepaid Expenses And Other Current Assets [Line Items]
Unrealized cash flow hedge gains	$ 9,555	$ 13,901

Property and Equipment, Net - N

Property and Equipment, Net - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Landfill depletion expense	$ 59,055	$ 53,826
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Finance lease right-of-use assets			$ 11,227	$ 10,342
Landfill [Member]
Property, Plant and Equipment [Line Items]
Landfill depletion expense			$ 232,251	$ 212,898	$ 200,374

Property and Equipment, Net - P

Property and Equipment, Net - Property and Equipment Schedule (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Property and equipment gross		$ 12,066,664	$ 10,276,878
Less accumulated depreciation and depletion		(5,115,749)	(4,554,929)
Property, Plant and Equipment, Net, Total	$ 6,956,620	6,950,915	5,721,949
Landfill [Member]
Property, Plant and Equipment [Line Items]
Property and equipment gross		5,179,768	4,447,530
Property, Plant and Equipment, Net, Total	$ 3,284,137
Rolling Stock [Member]
Property, Plant and Equipment [Line Items]
Property and equipment gross		2,835,330	2,483,294
Land, Buildings and Improvements
Property, Plant and Equipment [Line Items]
Property and equipment gross		1,673,062	1,339,542
Containers [Member]
Property, Plant and Equipment [Line Items]
Property and equipment gross		1,180,370	983,602
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment gross		1,065,767	940,723
Construction in Progress
Property, Plant and Equipment [Line Items]
Property and equipment gross		$ 132,367	$ 82,187

Leases - Narrative (Details)

Leases - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended			36 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2022
Leases [Abstract]
Operating lease impairment charge				$ 0
Finance lease impairment charge				$ 0
Remeasurements of ROU assets	$ 3,369	$ 10,012	$ 3,754

Leases - Operating and Financin

Leases - Operating and Financing Lease Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Lease cost for operating leases
Operating lease cost	$ 41,891	$ 40,381	$ 39,411
Amortization of leased assets	2,484	3,424
Interest on leased liabilities	219	152
Total lease cost	44,594	43,957	39,411
Operating cash flow information: Cash paid for amounts included in the measurement of lease liabilities	40,782	40,249	39,212
Operating cash flows from finance leases	219	152
Financing cash flows from finance leases	5,560	3,133
Right-of-use assets obtained in exchange for lease liabilities - operating leases	63,648	17,933	15,117
Right-of-use assets obtained in exchange for lease liabilities - finance lease	$ 3,369	$ 10,012	$ 3,754
Weighted average remaining lease term	8 years 10 months 24 days	8 years
Weighted average remaining lease term - finance leases	4 years 2 months 12 days	4 years 10 months 24 days
Weighted average discount rate	2.93%	3.37%
Weighted average discount rate - finance leases	1.96%	1.89%

10-K Leases (Operating and Fina

10-K Leases (Operating and Financing Leases) (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Leases [Abstract]
Operating lease right-of-use assets	$ 195,030	$ 192,506	$ 160,567
Less: current portion of operating lease liabilities	34,078	35,170	38,017
Current portion of finance lease liabilities		2,695
Long-term portion of operating lease liabilities	$ 169,051	165,462	$ 129,628
Long-term portion of finance lease liabilities		$ 8,769

Leases - Future Minimum Lease P

Leases - Future Minimum Lease Payments (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Future Minimum Lease Payments, Operating Leases
2023		$ 40,499
2024		32,521
2025		26,869
2026		22,317
2027		19,528
Thereafter (year five)		89,050
Minimum lease payments		230,784
Less: imputed interest		(30,152)
Present value of minimum lease payments		200,632
Less: current portion of operating lease liabilities	$ (34,078)	(35,170)	$ (38,017)
Long-term portion of operating lease liabilities	169,051	165,462	129,628
Future Minimum Lease Payments, Finance Leases
2023		2,906
2024		2,905
2025		2,905
2026		2,320
2027		898
Minimum lease payments		11,934
Less: imputed interest, finance leases		(470)
Present value of minimum lease payments, finance leases	$ 10,791	$ 11,464	$ 10,519
Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration]		Long Term Debt Current, Long Term Debt Noncurrent	Long Term Debt Current, Long Term Debt Noncurrent
Less: current portion of finance lease liabilities		$ (2,695)
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]		Long Term Debt Current
Long-term portion of finance lease liabilities		$ 8,769
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]		Long Term Debt Noncurrent

Acquisitions - Narrative (Det_2

Acquisitions - Narrative (Details)	3 Months Ended		12 Months Ended
	Mar. 31, 2023 USD ($) entity	Mar. 31, 2022 USD ($) entity	Mar. 31, 2023 USD ($) entity	Dec. 31, 2022 USD ($)	Dec. 31, 2022 USD ($) entity	Dec. 31, 2022 USD ($) agreement	Dec. 31, 2021 USD ($) entity agreement	Dec. 31, 2020 USD ($) entity
Business Acquisition [Line Items]
Number of immaterial businesses acquired in period | entity	4	4			24		30	21
Acquisition-related costs	$ 2,081,000	$ 4,540,000		$ 24,933,000			$ 11,318,000	$ 9,803,000
Contingent consideration							(31,616,000)
Goodwill expected to be deductible for tax purposes	36,853,000	80,455,000	$ 36,853,000	510,755,000	$ 510,755,000	$ 510,755,000	187,287,000	169,147,000
Trade receivables acquired in business combination gross contractual amount	4,164,000	11,412,000	4,164,000	54,332,000	54,332,000	54,332,000	36,645,000	13,854,000
Trade receivables acquired in business combination expected to be uncollectible amount	$ 282,000	$ 2,201,000	$ 282,000	4,636,000	$ 4,636,000	$ 4,636,000	$ 3,409,000	$ 95,000
Number of individually immaterial acquisitions			10		17	17
Number of immaterial businesses acquired in period | entity	4	4			24		30	21
Acquisition-related costs	$ 2,081,000	$ 4,540,000		24,933,000			$ 11,318,000	$ 9,803,000
Number of businesses acquired with contingent consideration | agreement							9
Contingent considerations							$ 31,616,000
Payment of contingent consideration recorded at acquisition date	$ 1,319,000	$ 3,571,000		16,911,000			$ 12,934,000	$ 12,566,000
Minimum [Member]
Business Acquisition [Line Items]
Contingent consideration payable period							1 year
Contingent consideration payable period							1 year
Maximum [Member]
Business Acquisition [Line Items]
Contingent consideration payable period							2 years
Contingent consideration payable period							2 years
Nine Acquired Businesses 2021 [Member]
Business Acquisition [Line Items]
Payment of contingent consideration recorded at acquisition date				$ 12,993,000
Measurement Input, Discount Rate [Member]
Business Acquisition [Line Items]
Business combination, contingent consideration, liability, measurement input							1.5
Contingent consideration measurement input							1.5

10-K Acquisitions - Narrative (

10-K Acquisitions - Narrative (Details)	3 Months Ended		12 Months Ended
	Mar. 31, 2023 USD ($) entity	Mar. 31, 2022 USD ($) entity	Mar. 31, 2023 USD ($) entity	Dec. 31, 2022 USD ($)	Dec. 31, 2022 USD ($) entity	Dec. 31, 2022 USD ($) agreement	Dec. 31, 2021 USD ($) entity agreement	Dec. 31, 2020 USD ($) entity
Business Acquisition [Line Items]
Cash consideration, net of cash acquired	$ 144,611,000	$ 355,212,000		$ 2,206,901,000			$ 960,449,000	$ 388,789,000
Contingent considerations							31,616,000
Increase in contingent consideration	(637,000)	(52,000)		(1,030,000)			$ 2,954,000	18,418,000
Number of businesses acquired with contingent consideration | agreement							9
Acquisition-related costs	$ 2,081,000	$ 4,540,000		24,933,000			$ 11,318,000	$ 9,803,000
Number of immaterial businesses acquired in period | entity	4	4			24		30	21
Revenues	$ 1,900,503,000	$ 1,646,255,000		7,211,859,000			$ 6,151,361,000	$ 5,445,990,000
Income before income tax provision	252,225,000	229,207,000		1,048,963,000			770,742,000	253,914,000
Impairments and other operating items	1,865,000	1,878,000		18,230,000			32,316,000	466,718,000
Goodwill expected to be deductible for tax purposes	36,853,000	80,455,000	$ 36,853,000	510,755,000	$ 510,755,000	$ 510,755,000	187,287,000	169,147,000
Trade receivables acquired in business combination gross contractual amount	4,164,000	11,412,000	4,164,000	54,332,000	54,332,000	54,332,000	36,645,000	13,854,000
Trade receivables acquired in business combination expected to be uncollectible amount	282,000	2,201,000	$ 282,000	4,636,000	$ 4,636,000	$ 4,636,000	$ 3,409,000	95,000
Fair value of acquired working capital is provisional			10		17	17
Measurement Input, Discount Rate [Member]
Business Acquisition [Line Items]
Contingent consideration measurement input							1.5
Maximum [Member]
Business Acquisition [Line Items]
Contingent consideration payable period							2 years
Minimum [Member]
Business Acquisition [Line Items]
Contingent consideration payable period							1 year
Debt [Member]
Business Acquisition [Line Items]
Liabilities incurred	$ 17,097,000	$ 0		$ 127,136,000			$ 108,345,000	$ 91,349,000

Acquisitions - Consideration _2

Acquisitions - Consideration Transferred to Acquire Businesses and Assets Acquired, Liabilities Assumed (Detail) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023 USD ($)	Mar. 31, 2022 USD ($)	Mar. 31, 2023 USD ($) entity	Dec. 31, 2022 USD ($)	Dec. 31, 2022 USD ($) entity	Dec. 31, 2022 USD ($) agreement	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Fair value of consideration transferred:
Cash	$ 144,611	$ 355,212		$ 2,206,901			$ 960,449	$ 388,789
Change in open working capital settlements at year end				0			0	1,505
Consideration transferred	161,708	355,212		2,334,037			1,068,794	481,643
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Accounts receivable	3,882	9,211	$ 3,882	49,696	$ 49,696	$ 49,696	33,236	13,759
Prepaid expenses and other current assets	2,290	2,059	2,290	9,428	9,428	9,428	4,866	4,509
Restricted investments	5,462	0	5,462	7,469	7,469	7,469	0	0
Operating lease right-of-use assets	587	1,715	587	4,707	4,707	4,707	5,972	5,247
Property and equipment	67,201	89,565	67,201	1,073,155	1,073,155	1,073,155	394,687	173,394
Indefinite-lived intangibles							9,557	13,465
Other assets				243	243	243	77	389
Current portion of operating lease liabilities	(53)	(830)	(53)	(1,546)	(1,546)	(1,546)	(1,370)	(509)
Deferred revenue	(761)	(3,077)	(761)	(10,761)	(10,761)	(10,761)	(8,389)	(1,821)
Long-term portion of operating lease liabilities	(534)	(885)	(534)	(3,161)	(3,161)	(3,161)	(4,602)	(4,738)
Other long-term liabilities	(4,543)	(631)	(4,543)	(6,915)	(6,915)	(6,915)	(13,976)	(2,136)
Deferred income taxes	(1,077)	(9,317)	(1,077)	(51,507)	(51,507)	(51,507)	(63,822)	(4,525)
Total identifiable net assets	124,855	140,611	124,855	1,509,446	1,509,446	1,509,446	614,199	296,340
Goodwill	36,853	214,601		824,591			454,595	185,303
Goodwill expected to be deductible for tax purposes	36,853	80,455	$ 36,853	510,755	$ 510,755	$ 510,755	187,287	169,147
Number of individually immaterial acquisitions			10		17	17
Trade receivables acquired in business combination gross contractual amount	4,164	11,412	$ 4,164	54,332	$ 54,332	$ 54,332	36,645	13,854
Trade receivables acquired in business combination expected to be uncollectible amount	282	2,201	282	4,636	4,636	4,636	3,409	95
Accounts Payable and Accrued Liabilities [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Accounts payable and accrued liabilities	(4,159)	(20,382)	(4,159)	(56,633)	(56,633)	(56,633)	(37,827)	(14,174)
Debt [Member]
Fair value of consideration transferred:
Debt assumed	17,097	0		127,136			108,345	91,349
Contingent Consideration [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Contingent consideration	(6,000)	(5,000)	(6,000)	(6,642)	(6,642)	(6,642)	(31,616)	(4,688)
Long Term Franchise Agreements And Contracts [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Intangibles	58,630	4,994	58,630	239,866	239,866	239,866	134,827	59,149
Customer Lists [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Intangibles	1,527	38,944	1,527	74,940	74,940	74,940	75,612	48,512
Permits and Other [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Intangibles	$ 2,403	$ 34,245	$ 2,403	$ 187,107	$ 187,107	$ 187,107	$ 116,967	$ 10,507

10-K Acquisitions - Summary of

10-K Acquisitions - Summary of Consideration Transferred to Acquire Businesses and Amounts of Identifiable Assets Acquired, Liabilities Assumed and Noncontrolling Interests (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Fair value of consideration transferred:
Cash	$ 144,611	$ 355,212	$ 2,206,901	$ 960,449	$ 388,789
Change in open working capital settlements at year end			0	0	1,505
Consideration transferred	161,708	355,212	2,334,037	1,068,794	481,643
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Accounts receivable	3,882	9,211	49,696	33,236	13,759
Prepaid expenses and other current assets	2,290	2,059	9,428	4,866	4,509
Operating lease right-of-use assets	587	1,715	4,707	5,972	5,247
Property and equipment	67,201	89,565	1,073,155	394,687	173,394
Indefinite-lived intangibles				9,557	13,465
Other assets			243	77	389
Current portion of operating lease liabilities	(53)	(830)	(1,546)	(1,370)	(509)
Deferred revenue	(761)	(3,077)	(10,761)	(8,389)	(1,821)
Long-term portion of operating lease liabilities	(534)	(885)	(3,161)	(4,602)	(4,738)
Other long-term liabilities	(4,543)	(631)	(6,915)	(13,976)	(2,136)
Deferred income taxes	(1,077)	(9,317)	(51,507)	(63,822)	(4,525)
Total identifiable net assets	124,855	140,611	1,509,446	614,199	296,340
Goodwill	36,853	214,601	824,591	454,595	185,303
Accounts Payable and Accrued Liabilities [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Accounts payable and accrued liabilities	(4,159)	(20,382)	(56,633)	(37,827)	(14,174)
Debt [Member]
Fair value of consideration transferred:
Liabilities incurred	17,097	0	127,136	108,345	91,349
Contingent Consideration [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Contingent consideration	(6,000)	(5,000)	(6,642)	(31,616)	(4,688)
Long Term Franchise Agreements And Contracts [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Intangibles	58,630	4,994	239,866	134,827	59,149
Customer Lists [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Intangibles	1,527	38,944	74,940	75,612	48,512
Permits and Other [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Intangibles	$ 2,403	$ 34,245	$ 187,107	$ 116,967	$ 10,507

Intangible Assets, Net - Narr_2

Intangible Assets, Net - Narrative (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Long-term Franchise Agreements and Contracts [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted average amortization period of acquired intangible assets	25 years	28 years 10 months 24 days
Customer Lists [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted average amortization period of acquired intangible assets	11 years 6 months	11 years 6 months
Permits and Other [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted average amortization period of acquired intangible assets	40 years	40 years

Intangible Assets, Net - Exclus

Intangible Assets, Net - Exclusive of Goodwill (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross carrying amount	$ 2,535,576	$ 2,472,990	$ 2,033,511
Intangible assets, exclusive of goodwill, gross	2,717,189	2,654,603
Finite-lived intangible assets, accumulated amortization	(979,212)	(939,902)	(823,743)
Intangible assets, accumulated impairment loss		(40,784)	(40,784)
Net Carrying Amount, Finite-Lived Intangible Assets	1,515,580	1,492,304	1,168,984
Net Carrying Amount, Intangible Assets	1,697,193	1,673,917	1,350,597
Solid Waste Collection and Transportation Permits [Member]
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets, gross carrying amount		181,613	181,613
Net Carrying Amount, Indefinite-Lived Intangible Assets	181,613	181,613	181,613
Long-term Franchise Agreements and Contracts [Member]
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross carrying amount	975,058	916,582	724,128
Finite-lived intangible assets, accumulated amortization	(312,988)	(297,382)	(278,827)
Net Carrying Amount, Finite-Lived Intangible Assets	662,070	619,200	445,301
Customer Lists [Member]
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross carrying amount	778,352	776,719	711,047
Finite-lived intangible assets, accumulated amortization	(545,232)	(527,425)	(450,109)
Net Carrying Amount, Finite-Lived Intangible Assets	233,120	249,294	260,938
Permits and Other [Member]
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross carrying amount	782,166	779,689	598,336
Finite-lived intangible assets, accumulated amortization	(120,992)	(115,095)	(94,807)
Intangible assets, accumulated impairment loss		(40,784)	(40,784)
Net Carrying Amount, Finite-Lived Intangible Assets	$ 620,390	$ 623,810	$ 462,745

10-K Intangible Assets, Net (In

10-K Intangible Assets, Net (Intangible Assets Exclusive of Goodwill) (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross carrying amount	$ 2,535,576	$ 2,472,990	$ 2,033,511
Intangible assets, exclusive of goodwill, gross	2,717,189	2,654,603
Finite-lived intangible assets, accumulated amortization	(979,212)	(939,902)	(823,743)
Intangible assets, accumulated impairment loss		(40,784)	(40,784)
Net Carrying Amount, Finite-Lived Intangible Assets	1,515,580	1,492,304	1,168,984
Net Carrying Amount, Intangible Assets	1,697,193	1,673,917	1,350,597
Intangible assets, exclusive of goodwill		2,654,603	2,215,124
Solid Waste Collection and Transportation Permits [Member]
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets, gross carrying amount		181,613	181,613
Net Carrying Amount, Indefinite-Lived Intangible Assets	181,613	181,613	181,613
Long-term Franchise Agreements and Contracts [Member]
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross carrying amount	975,058	916,582	724,128
Finite-lived intangible assets, accumulated amortization	(312,988)	(297,382)	(278,827)
Net Carrying Amount, Finite-Lived Intangible Assets	662,070	619,200	445,301
Customer Lists [Member]
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross carrying amount	778,352	776,719	711,047
Finite-lived intangible assets, accumulated amortization	(545,232)	(527,425)	(450,109)
Net Carrying Amount, Finite-Lived Intangible Assets	233,120	249,294	260,938
Permits and Other [Member]
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross carrying amount	782,166	779,689	598,336
Finite-lived intangible assets, accumulated amortization	(120,992)	(115,095)	(94,807)
Intangible assets, accumulated impairment loss		(40,784)	(40,784)
Net Carrying Amount, Finite-Lived Intangible Assets	$ 620,390	$ 623,810	$ 462,745

Intangible Assets, Net - Esti_2

Intangible Assets, Net - Estimated Future Amortization Expense of Amortizable Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Intangible Assets, Net [Abstract]
For the year ending December 31, 2022	$ 156,320
For the year ending December 31, 2023	141,755	$ 153,457
For the year ending December 31, 2024	124,919	135,884
For the year ending December 31, 2025	109,325	119,071
For the year ending December 31, 2026	$ 95,730	103,541
For the year ending December 31, 2027		$ 89,959

10-K Intangible Assets, Net (Es

10-K Intangible Assets, Net (Estimated Future Amortization Expense of Amortizable Intangible Assets) (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Intangible Assets, Net [Abstract]
For the year ending December 31, 2023	$ 141,755	$ 153,457
For the year ending December 31, 2024	124,919	135,884
For the year ending December 31, 2025	109,325	119,071
For the year ending December 31, 2026	$ 95,730	103,541
For the year ending December 31, 2027		$ 89,959

Accrued Liabilities (Details)

Accrued Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Accrued Liabilities [Line Items]
Insurance claims and premiums		$ 152,242	$ 149,864
Payroll and payroll-related		126,301	141,877
Interest payable		47,612	28,729
Final capping, closure and post-closure liability - current portion		17,336	19,925
Property taxes		11,218	8,833
Environmental remediation reserve - current portion		3,165	2,300
Cell processing reserve - current portion		2,939	3,364
Share-based compensation plan liability - current portion		2,344	2,423
Transaction-related expenses		1,627	3,130
Unrealized cash flow hedge losses			51,081
Other		66,463	63,476
Accrued Liabilities, Current, Total	$ 390,195	$ 431,247	442,596
Interest Rate Swap [Member]
Accrued Liabilities [Line Items]
Unrealized cash flow hedge losses			18,675
Interest Rate Swap [Member] | Accrued Liabilities [Member]
Accrued Liabilities [Line Items]
Unrealized cash flow hedge losses			18,675
Interest Rate Swap [Member] | Other Non-Current Liabilities [Member]
Accrued Liabilities [Line Items]
Unrealized cash flow hedge losses			$ 32,406

Long-Term Debt - Long-Term Debt

Long-Term Debt - Long-Term Debt (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Mar. 31, 2023	Dec. 31, 2021	Aug. 31, 2021	Apr. 01, 2021
Debt Instrument [Line Items]
Total debt and lease obligations	$ 6,963,401,000	$ 6,997,427,000	$ 5,101,971,000
Less - current portion	(6,759,000)	(10,513,000)	(6,020,000)
Finance leases	11,464,000	10,791,000	10,519,000
Less - current portion	(6,759,000)	(10,513,000)	(6,020,000)
Less - unamortized debt discount and issuance costs	(66,493,000)	(65,075,000)	(55,451,000)
Long-term debt and notes payable	6,890,149,000	6,921,839,000	5,040,500,000
Long-term debt and lease obligation	$ 6,890,149,000	$ 6,921,839,000	5,040,500,000
Minimum [Member]
Debt Instrument [Line Items]
Finance leases interest rate	1.89%	1.89%
Maximum [Member]
Debt Instrument [Line Items]
Finance leases interest rate	2.16%	2.16%
Term Loan Agreement [Member] | Term Loan Facility
Debt Instrument [Line Items]
Long term debt	$ 800,000,000	$ 800,000,000	0
Interest rate	5.42%	5.78%
Credit Agreement [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Long term debt	$ 614,705,000	$ 650,587,000	803,944,000
Credit Agreement [Member] | Revolving Credit Facility [Member] | Minimum [Member]
Debt Instrument [Line Items]
Line of credit, interest rate	5.42%	5.77%
Credit Agreement [Member] | Revolving Credit Facility [Member] | Maximum [Member]
Debt Instrument [Line Items]
Line of credit, interest rate	5.74%	5.92%
Credit Agreement [Member] | Term Loan Facility
Debt Instrument [Line Items]
Long term debt	$ 650,000,000	$ 650,000,000	650,000,000
Line of credit, interest rate	5.42%	5.77%
Senior Notes due 2021 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Long term debt					$ 100,000,000
New Senior Notes due 2021 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Long term debt				$ 150,000,000
Senior Notes due 2022 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Long term debt				125,000,000
Senior Notes due 2023 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Long term debt				200,000,000
Senior Notes due 2024 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Long term debt				150,000,000
Senior Notes due 2025 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Long term debt				375,000,000
Senior Notes due 2026 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Long term debt				400,000,000
Senior Notes due 2027 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Long term debt				$ 250,000,000
Senior Notes due 2028 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Long term debt	$ 500,000,000	$ 500,000,000	$ 500,000,000
Interest rate	4.25%	4.25%	4.25%
Debt instrument, redemption period	Sep. 01, 2028
Senior Notes due 2029 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Long term debt	$ 500,000,000	$ 500,000,000	$ 500,000,000
Interest rate	3.50%	3.50%	3.50%
Debt instrument, redemption period	Feb. 01, 2029
Senior Notes due 2030 | Senior Notes [Member]
Debt Instrument [Line Items]
Long term debt	$ 600,000,000	$ 600,000,000	$ 600,000,000
Interest rate	2.60%	2.60%	2.60%
Debt instrument, redemption period	Nov. 01, 2029
Senior Notes due 2032 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Long term debt	$ 650,000,000	$ 650,000,000	$ 650,000,000
Interest rate	2.20%	2.20%
Debt instrument, redemption period	Oct. 15, 2031
New Senior Notes due 2032 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Long term debt	$ 500,000,000	$ 500,000,000	0
Interest rate	3.20%	3.20%
Debt instrument, redemption period	Mar. 01, 2032
Senior Notes due 2033 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Long term debt	$ 750,000,000	$ 750,000,000	0
Interest rate	4.20%	4.20%
Debt instrument, redemption period	Oct. 15, 2032
Senior Notes due 2050 | Senior Notes [Member]
Debt Instrument [Line Items]
Long term debt	$ 500,000,000	$ 500,000,000	$ 500,000,000
Interest rate	3.05%	3.05%	3.05%
Debt instrument, redemption period	Oct. 01, 2049
Senior Notes due 2052 | Senior Notes [Member]
Debt Instrument [Line Items]
Long term debt	$ 850,000,000	$ 850,000,000	$ 850,000,000
Interest rate	2.95%	2.95%	2.95%
Debt instrument, redemption period	Jul. 15, 2051
Notes Payable to Sellers and Other Third Parties [Member]
Debt Instrument [Line Items]
Long term debt	$ 37,232,000	$ 36,049,000	$ 37,508,000
Notes Payable to Sellers and Other Third Parties [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate	2.42%	2.42%
Notes Payable to Sellers and Other Third Parties [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate	10.35%	10.35%

10-K - Long-Term Debt - Narrati

10-K - Long-Term Debt - Narrative (Details) - USD ($)

3 Months Ended

12 Months Ended

Oct. 31, 2022

Aug. 31, 2021

Apr. 01, 2021

Mar. 31, 2023

Mar. 31, 2022

Dec. 31, 2022

Dec. 31, 2021

Dec. 31, 2020

Sep. 20, 2021

Mar. 13, 2020

Jan. 23, 2020

Dec. 31, 2019

Apr. 16, 2019

Nov. 16, 2018

Debt Instrument [Line Items]

Cash and equivalents

$ 133,860,000

$ 78,637,000

$ 147,441,000

Cash and cash equivalents

240,485,000

$ 463,284,000

181,364,000

219,615,000

$ 714,389,000

$ 423,221,000

Loss from extinguishment of debt

$ 0

(115,288,000)

0

Credit Agreement [Member]

Debt Instrument [Line Items]

Maturity date

Jul. 30, 2026

Credit facility

$ 2,500,000,000

Covenant description

as of the last day of each fiscal quarter, the ratio of (a) Consolidated Total Funded Debt (as defined in the Credit Agreement) as of such date to (b) Consolidated EBITDA (as defined in the Credit Agreement), measured for the preceding 12 months, to not more than 3.75 to 1.00 (or 4.25 to 1.00 during material acquisition periods, subject to certain limitations).

Covenant compliance

As of December 31, 2022 and 2021, the Company was in compliance with all applicable covenants in the Credit Agreement as in effect as of the applicable date

Credit Agreement [Member] | Letter of Credit [Member]

Debt Instrument [Line Items]

Letter of credit

39,511,000

$ 41,793,000

112,281,000

Credit facility

320,000,000

Credit Agreement [Member] | Revolving Credit Facility [Member]

Debt Instrument [Line Items]

Debt issuance costs

8,674,000

Credit facility

1,850,000,000

Long term debt

$ 650,587,000

$ 614,705,000

$ 803,944,000

Commitment - rate applicable

0.09%

0.09%

0.09%

Credit Agreement [Member] | Term Loan Facility

Debt Instrument [Line Items]

Credit facility

$ 650,000,000

Credit Agreement [Member] | Minimum [Member] | Revolving Credit Facility [Member]

Debt Instrument [Line Items]

Interest rate applicable

5.77%

5.42%

Commitment - rate applicable

0.065%

Credit Agreement [Member] | Maximum [Member]

Debt Instrument [Line Items]

Required leverage ratio during material acquisition period

4.25

Required leverage ratio

3.75

Credit Agreement [Member] | Maximum [Member] | Revolving Credit Facility [Member]

Debt Instrument [Line Items]

Interest rate applicable

5.92%

5.74%

Commitment - rate applicable

0.15%

Credit Agreement [Member] | Maximum [Member] | Swing Line Loans [Member]

Debt Instrument [Line Items]

Swing line loans

$ 100,000,000

Other Facilities Not Affiliated With Credit Agreement [Member] | Letter of Credit [Member]

Debt Instrument [Line Items]

Letter of credit

$ 85,120,000

85,319,000

Notes Payable to Sellers and Other Third Parties [Member]

Debt Instrument [Line Items]

Long term debt

$ 36,049,000

$ 37,232,000

$ 37,508,000

Notes Payable to Sellers and Other Third Parties [Member] | Minimum [Member]

Debt Instrument [Line Items]

Interest rate

2.42%

2.42%

Notes Payable to Sellers and Other Third Parties [Member] | Maximum [Member]

Debt Instrument [Line Items]

Interest rate

10.35%

10.35%

Drawing Fees For Bankers Acceptance And Ba Equivalent Notes And Letter Of Credit [Member] | Minimum [Member]

Debt Instrument [Line Items]

Margin rate for loans

0.75%

Drawing Fees For Bankers Acceptance And Ba Equivalent Notes And Letter Of Credit [Member] | Maximum [Member]

Debt Instrument [Line Items]

Margin rate for loans

1.25%

Senior Notes [Member]

Debt Instrument [Line Items]

Percentage of aggregate principal amount to be repurchased if change of control

100%

Covenant compliance

As of December 31, 2022 and 2021, the Company was in compliance with all applicable covenants in the Indenture

Senior Notes [Member] | Maximum [Member]

Debt Instrument [Line Items]

Percentage of aggregate principal amount to be repurchased if change of control

101%

Senior Notes [Member] | Senior Notes due 2021 [Member]

Debt Instrument [Line Items]

Maturity date

Apr. 01, 2021

Long term debt

$ 100,000,000

Senior Notes [Member] | New Senior Notes due 2021 [Member]

Debt Instrument [Line Items]

Maturity date

Jun. 01, 2021

Long term debt

$ 150,000,000

Senior Notes [Member] | Senior Notes due 2022 [Member]

Debt Instrument [Line Items]

Maturity date

Aug. 20, 2022

Long term debt

$ 125,000,000

Senior Notes [Member] | Senior Notes due 2023 [Member]

Debt Instrument [Line Items]

Maturity date

Jun. 01, 2023

Long term debt

$ 200,000,000

Senior Notes [Member] | Senior Notes due 2024 [Member]

Debt Instrument [Line Items]

Maturity date

Apr. 20, 2024

Long term debt

$ 150,000,000

Senior Notes [Member] | Senior Notes due 2025 [Member]

Debt Instrument [Line Items]

Maturity date

Aug. 20, 2025

Long term debt

$ 375,000,000

Senior Notes [Member] | Senior Notes due 2026 [Member]

Debt Instrument [Line Items]

Maturity date

Jun. 01, 2026

Long term debt

$ 400,000,000

Senior Notes [Member] | Senior Notes due 2027 [Member]

Debt Instrument [Line Items]

Maturity date

Apr. 20, 2027

Long term debt

$ 250,000,000

Senior Notes [Member] | Senior Notes due 2028 [Member]

Debt Instrument [Line Items]

Aggregate principal amount

$ 500,000,000

Interest rate

4.25%

4.25%

4.25%

Maturity date

Dec. 01, 2028

Debt instrument, redemption period

Sep. 01, 2028

Debt issuance costs

$ 5,792,000

Percentage of aggregate principal amount to be repurchased if change of control

100%

Long term debt

$ 500,000,000

$ 500,000,000

$ 500,000,000

Senior Notes [Member] | Senior Notes due 2029 [Member]

Debt Instrument [Line Items]

Aggregate principal amount

$ 500,000,000

Interest rate

3.50%

3.50%

3.50%

Maturity date

May 01, 2029

Debt instrument, redemption period

Feb. 01, 2029

Debt issuance costs

$ 5,954,000

Long term debt

$ 500,000,000

$ 500,000,000

$ 500,000,000

Senior Notes [Member] | Senior Notes due 2029 [Member] | Minimum [Member]

Debt Instrument [Line Items]

Percentage of aggregate principal amount to be repurchased if change of control

100%

Senior Notes [Member] | Senior Notes due 2030

Debt Instrument [Line Items]

Aggregate principal amount

$ 600,000,000

Interest rate

2.60%

2.60%

2.60%

Maturity date

Feb. 01, 2030

Debt instrument, redemption period

Nov. 01, 2029

Debt issuance costs

$ 5,435,000

Percentage of aggregate principal amount to be repurchased if change of control

100%

Long term debt

$ 600,000,000

$ 600,000,000

$ 600,000,000

Senior Notes [Member] | Senior Notes due 2032 [Member]

Debt Instrument [Line Items]

Aggregate principal amount

$ 650,000,000

Interest rate

2.20%

2.20%

Maturity date

Jan. 15, 2032

Debt instrument, redemption period

Oct. 15, 2031

Debt discount

$ 1,066,000

Debt issuance costs

$ 5,979,000

Percentage of aggregate principal amount to be repurchased if change of control

100%

Long term debt

$ 650,000,000

$ 650,000,000

$ 650,000,000

Senior Notes [Member] | Senior Notes due 2050

Debt Instrument [Line Items]

Aggregate principal amount

$ 500,000,000

Interest rate

3.05%

3.05%

3.05%

Maturity date

Apr. 01, 2050

Debt instrument, redemption period

Oct. 01, 2049

Debt discount

$ 7,375,000

Debt issuance costs

$ 5,682,000

Percentage of aggregate principal amount to be repurchased if change of control

100%

Long term debt

$ 500,000,000

$ 500,000,000

$ 500,000,000

Senior Notes [Member] | Senior Notes due 2052

Debt Instrument [Line Items]

Aggregate principal amount

$ 850,000

Interest rate

2.95%

2.95%

2.95%

Maturity date

Jan. 15, 2052

Debt instrument, redemption period

Jul. 15, 2051

Debt discount

$ 12,742,000

Debt issuance costs

$ 9,732,000

Percentage of aggregate principal amount to be repurchased if change of control

100%

Long term debt

$ 850,000,000

$ 850,000,000

$ 850,000,000

Senior Notes [Member] | Private Placement Notes [Member]

Debt Instrument [Line Items]

Debt extinguishment

1,500,000,000

Senior Notes [Member] | Private Placement Notes Make Whole Payment [Member]

Debt Instrument [Line Items]

Debt extinguishment

110,617,000

Term Loan Facility | Term Loan Agreement [Member]

Debt Instrument [Line Items]

Aggregate principal amount

$ 800,000,000

Interest rate

5.78%

5.42%

Maturity date

Jul. 30, 2026

Debt issuance costs

$ 1,725,000

Long term debt

$ 800,000,000

$ 800,000,000

0

Margin rate for loans

1%

Covenant description

as of the last day of each fiscal quarter, the ratio of (i) Consolidated Total Funded Debt (as defined in the Term Loan Agreement) as of such date to (b) Consolidated EBITDA (as defined in the Term Loan Agreement), measured for the preceding 12 months, to not more than 3.75 to 1.00 (or 4.25 to 1.00 during material acquisition periods, subject to certain limitations)

Covenant compliance

As of December 31, 2022, the Company was in compliance with all applicable covenants in the Term Loan Agreement.

Term Loan Facility | Term Loan Agreement [Member] | Maximum [Member]

Debt Instrument [Line Items]

Required leverage ratio during material acquisition period

4.25

Required leverage ratio

3.75

Term Loan Facility | Credit Agreement [Member]

Debt Instrument [Line Items]

Long term debt

$ 650,000,000

$ 650,000,000

650,000,000

Interest rate applicable

5.77%

5.42%

Term Loan Facility | Credit Agreement [Member] | Revolving Credit Facility [Member]

Debt Instrument [Line Items]

Credit facility maximum increase to borrowing capacity

$ 500,000,000

Maximum amount of increase in commitments under the credit agreement

3,000,000,000

Other Assets [Member] | Credit Agreement [Member]

Debt Instrument [Line Items]

Prepaid expense, debt issuance costs

2,901,000

Debt [Member]

Debt Instrument [Line Items]

Liabilities incurred

$ 17,097,000

$ 0

$ 127,136,000

108,345,000

$ 91,349,000

SOFR [Member] | Credit Agreement [Member]

Debt Instrument [Line Items]

Margin rate for loans

0.10%

SOFR [Member] | Credit Agreement [Member] | Revolving Credit Facility [Member]

Debt Instrument [Line Items]

Long term debt

$ 391,000,000

Margin rate for loans

1%

Interest rate applicable

5.42%

SOFR [Member] | Credit Agreement [Member] | Term Loan Facility

Debt Instrument [Line Items]

Long term debt

$ 650,000,000

$ 650,000,000

Margin rate for loans

1%

Interest rate applicable

5.77%

5.42%

SOFR [Member] | Term Loan Facility | Term Loan Agreement [Member]

Debt Instrument [Line Items]

Margin rate for loans

0.10%

SOFR [Member] | Term Loan Facility | Term Loan Agreement [Member] | Minimum [Member]

Debt Instrument [Line Items]

Margin rate for loans

0.75%

SOFR [Member] | Term Loan Facility | Term Loan Agreement [Member] | Maximum [Member]

Debt Instrument [Line Items]

Margin rate for loans

1.25%

LIBOR [Member] | Credit Agreement [Member] | Revolving Credit Facility [Member]

Debt Instrument [Line Items]

Long term debt

$ 631,000,000

Margin rate for loans

1%

Interest rate applicable

1.10%

LIBOR [Member] | Credit Agreement [Member] | Term Loan Facility

Debt Instrument [Line Items]

Long term debt

$ 650,000,000

Margin rate for loans

1.20%

Interest rate applicable

1.10%

Base Rate [Member] | Credit Agreement [Member] | Revolving Credit Facility [Member]

Debt Instrument [Line Items]

Long term debt

$ 158,000,000

Margin rate for loans

0%

Interest rate applicable

3.25%

Base Rate [Member] | Canadian Prime Rate Loans and Swing Line Loans [Member] | Minimum [Member]

Debt Instrument [Line Items]

Margin rate for loans

0%

Base Rate [Member] | Canadian Prime Rate Loans and Swing Line Loans [Member] | Maximum [Member]

Debt Instrument [Line Items]

Margin rate for loans

0.25%

Base Rate [Member] | Term Loan Facility | Term Loan Agreement [Member] | Minimum [Member]

Debt Instrument [Line Items]

Margin rate for loans

0%

Base Rate [Member] | Term Loan Facility | Term Loan Agreement [Member] | Maximum [Member]

Debt Instrument [Line Items]

Margin rate for loans

0.25%

Canadian Bankers Acceptance Loan [Member] | Credit Agreement [Member] | Revolving Credit Facility [Member]

Debt Instrument [Line Items]

Long term debt

$ 210,587,000

$ 223,705,000

$ 3,944,000

Margin rate for loans

1%

1%

Interest rate applicable

5.92%

5.74%

1.45%

Long-Term Debt - Narrative (Det

Long-Term Debt - Narrative (Details) - USD ($)		3 Months Ended	12 Months Ended
	Oct. 31, 2022	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Aug. 18, 2022	Mar. 09, 2022	Sep. 20, 2021	Mar. 13, 2020	Jan. 23, 2020	Apr. 16, 2019
Loss from extinguishment of debt			$ 0	$ (115,288,000)	$ 0
Debt discount and issuance costs		$ 65,075,000	$ 66,493,000	$ 55,451,000
Credit Agreement [Member]
Maturity date			Jul. 30, 2026
Debt Instrument, Covenant Compliance			As of December 31, 2022 and 2021, the Company was in compliance with all applicable covenants in the Credit Agreement as in effect as of the applicable date
Covenant description			as of the last day of each fiscal quarter, the ratio of (a) Consolidated Total Funded Debt (as defined in the Credit Agreement) as of such date to (b) Consolidated EBITDA (as defined in the Credit Agreement), measured for the preceding 12 months, to not more than 3.75 to 1.00 (or 4.25 to 1.00 during material acquisition periods, subject to certain limitations).
Credit facility maximum borrowing capacity			$ 2,500,000,000
Credit Agreement [Member] | Revolving Credit Facility [Member]
Commitment - rate applicable		0.09%	0.09%	0.09%
Debt issuance costs			$ 8,674,000
Credit facility maximum borrowing capacity			1,850,000,000
Credit Agreement [Member] | Letter of Credit [Member]
Credit facility maximum borrowing capacity			320,000,000
Letter of credit		$ 39,511,000	$ 41,793,000	$ 112,281,000
Credit Agreement [Member] | Minimum [Member] | Revolving Credit Facility [Member]
Commitment - rate applicable			0.065%
Credit Agreement [Member] | Maximum [Member]
Required leverage ratio			3.75
Required leverage ratio during material acquisition period			4.25
Credit Agreement [Member] | Maximum [Member] | Revolving Credit Facility [Member]
Commitment - rate applicable			0.15%
Credit Agreement [Member] | Maximum [Member] | Swing Line Loans [Member]
Swing line loans			$ 100,000,000
Other Facilities Not Affiliated With Credit Agreement [Member] | Letter of Credit [Member]
Letter of credit		$ 85,120,000	$ 85,319,000
Drawing Fees For Bankers Acceptance And Ba Equivalent Notes And Letter Of Credit [Member] | Minimum [Member]
Margin rate for loans			0.75%
Drawing Fees For Bankers Acceptance And Ba Equivalent Notes And Letter Of Credit [Member] | Maximum [Member]
Margin rate for loans			1.25%
SOFR [Member] | Credit Agreement [Member]
Margin rate for loans			0.10%
SOFR [Member] | Credit Agreement [Member] | Revolving Credit Facility [Member]
Margin rate for loans			1%
LIBOR [Member] | Credit Agreement [Member] | Revolving Credit Facility [Member]
Margin rate for loans				1%
Base Rate [Member] | Credit Agreement [Member] | Revolving Credit Facility [Member]
Margin rate for loans				0%
Base Rate [Member] | Canadian Prime Rate Loans and Swing Line Loans [Member] | Minimum [Member]
Margin rate for loans			0%
Base Rate [Member] | Canadian Prime Rate Loans and Swing Line Loans [Member] | Maximum [Member]
Margin rate for loans			0.25%
Canadian Bankers Acceptance Loan [Member] | Credit Agreement [Member] | Revolving Credit Facility [Member]
Margin rate for loans			1%	1%
Term Loan Facility | Term Loan Agreement [Member]
Aggregate principal amount	$ 800,000,000
Interest rate		5.78%	5.42%
Margin rate for loans			1%
Maturity date			Jul. 30, 2026
Debt Instrument, Covenant Compliance			As of December 31, 2022, the Company was in compliance with all applicable covenants in the Term Loan Agreement.
Covenant description			as of the last day of each fiscal quarter, the ratio of (i) Consolidated Total Funded Debt (as defined in the Term Loan Agreement) as of such date to (b) Consolidated EBITDA (as defined in the Term Loan Agreement), measured for the preceding 12 months, to not more than 3.75 to 1.00 (or 4.25 to 1.00 during material acquisition periods, subject to certain limitations)
Debt issuance costs			$ 1,725,000
Term Loan Facility | Term Loan Agreement [Member] | Maximum [Member]
Required leverage ratio			3.75
Required leverage ratio during material acquisition period			4.25
Term Loan Facility | Credit Agreement [Member] | Revolving Credit Facility [Member]
Credit facility maximum increase to borrowing capacity			$ 500,000,000
Maximum amount of increase in commitments under the credit agreement			$ 3,000,000,000
Term Loan Facility | SOFR [Member] | Term Loan Agreement [Member]
Margin rate for loans	0.10%
Term Loan Facility | SOFR [Member] | Term Loan Agreement [Member] | Minimum [Member]
Margin rate for loans	0.75%
Term Loan Facility | SOFR [Member] | Term Loan Agreement [Member] | Maximum [Member]
Margin rate for loans	1.25%
Term Loan Facility | Base Rate [Member] | Term Loan Agreement [Member] | Minimum [Member]
Margin rate for loans	0%
Term Loan Facility | Base Rate [Member] | Term Loan Agreement [Member] | Maximum [Member]
Margin rate for loans	0.25%
Senior Notes [Member]
Debt instrument, redemption price, percentage			100%
Debt Instrument, Covenant Compliance			As of December 31, 2022 and 2021, the Company was in compliance with all applicable covenants in the Indenture
Senior Notes [Member] | Minimum [Member]
Percentage of principal amount redeemed			25%
Senior Notes [Member] | Maximum [Member]
Debt instrument, redemption price, percentage			101%
Senior Notes [Member] | Senior Notes due 2029 [Member]
Aggregate principal amount											$ 500,000,000
Interest rate		3.50%	3.50%	3.50%
Maturity date			May 01, 2029
Debt instrument, redemption period			Feb. 01, 2029
Debt issuance costs			$ 5,954,000
Senior Notes [Member] | Senior Notes due 2029 [Member] | Minimum [Member]
Debt instrument, redemption price, percentage			100%
Senior Notes [Member] | Senior Notes due 2030
Aggregate principal amount										$ 600,000,000
Interest rate		2.60%	2.60%	2.60%
Maturity date			Feb. 01, 2030
Debt instrument, redemption price, percentage			100%
Debt instrument, redemption period			Nov. 01, 2029
Debt issuance costs			$ 5,435,000
Senior Notes [Member] | New Senior Notes due 2032 [Member]
Aggregate principal amount							$ 500,000,000
Interest rate		3.20%	3.20%
Maturity date			Jun. 01, 2032
Debt instrument, redemption price, percentage			100%
Debt instrument, redemption period			Mar. 01, 2032
Debt issuance costs			$ 4,668,000
Debt discount			$ 375,000
Senior Notes [Member] | Senior Notes due 2033 [Member]
Aggregate principal amount						$ 750,000,000
Interest rate		4.20%	4.20%
Maturity date			Jan. 15, 2033
Debt instrument, redemption price, percentage			100%
Debt instrument, redemption period			Oct. 15, 2032
Debt issuance costs			$ 6,878,000
Debt discount			$ 2,040,000
Senior Notes [Member] | Senior Notes due 2032 [Member]
Aggregate principal amount								$ 650,000,000
Interest rate		2.20%	2.20%
Maturity date			Jan. 15, 2032
Debt instrument, redemption price, percentage			100%
Debt instrument, redemption period			Oct. 15, 2031
Debt issuance costs			$ 5,979,000
Debt discount			$ 1,066,000
Senior Notes [Member] | Senior Notes due 2052
Aggregate principal amount								$ 850,000
Interest rate		2.95%	2.95%	2.95%
Maturity date			Jan. 15, 2052
Debt instrument, redemption price, percentage			100%
Debt instrument, redemption period			Jul. 15, 2051
Debt issuance costs			$ 9,732,000
Debt discount			$ 12,742,000
Senior Notes [Member] | Senior Notes due 2050
Aggregate principal amount									$ 500,000,000
Interest rate		3.05%	3.05%	3.05%
Maturity date			Apr. 01, 2050
Debt instrument, redemption price, percentage			100%
Debt instrument, redemption period			Oct. 01, 2049
Debt issuance costs			$ 5,682,000
Debt discount			$ 7,375,000

Long-Term Debt - Long-Term De_2

Long-Term Debt - Long-Term Debt (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Mar. 31, 2023	Dec. 31, 2021	Aug. 31, 2021	Apr. 01, 2021
Debt Instrument [Line Items]
Total debt and lease obligations	$ 6,963,401,000	$ 6,997,427,000	$ 5,101,971,000
Less - current portion	(6,759,000)	(10,513,000)	(6,020,000)
Finance leases	11,464,000	10,791,000	10,519,000
Less - current portion	(6,759,000)	(10,513,000)	(6,020,000)
Debt discount and issuance costs	66,493,000	65,075,000	55,451,000
Long-term debt and notes payable	6,890,149,000	6,921,839,000	5,040,500,000
Long-term debt and lease obligation	$ 6,890,149,000	$ 6,921,839,000	5,040,500,000
Minimum [Member]
Debt Instrument [Line Items]
Finance leases interest rate	1.89%	1.89%
Maximum [Member]
Debt Instrument [Line Items]
Finance leases interest rate	2.16%	2.16%
Senior Notes [Member] | Minimum [Member]
Debt Instrument [Line Items]
Percentage of principal amount redeemed	25%
Credit Agreement [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Long term debt	$ 614,705,000	$ 650,587,000	803,944,000
Credit Agreement [Member] | Revolving Credit Facility [Member] | Minimum [Member]
Debt Instrument [Line Items]
Line of credit, interest rate	5.42%	5.77%
Credit Agreement [Member] | Revolving Credit Facility [Member] | Maximum [Member]
Debt Instrument [Line Items]
Line of credit, interest rate	5.74%	5.92%
Credit Agreement [Member] | Term Loan Facility
Debt Instrument [Line Items]
Long term debt	$ 650,000,000	$ 650,000,000	650,000,000
Line of credit, interest rate	5.42%	5.77%
Senior Notes due 2021 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Long term debt					$ 100,000,000
New Senior Notes due 2021 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Long term debt				$ 150,000,000
Senior Notes due 2022 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Long term debt				125,000,000
Senior Notes due 2023 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Long term debt				200,000,000
Senior Notes due 2024 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Long term debt				150,000,000
Senior Notes due 2025 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Long term debt				375,000,000
Senior Notes due 2026 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Long term debt				400,000,000
Senior Notes due 2027 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Long term debt				$ 250,000,000
Senior Notes due 2028 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Long term debt	$ 500,000,000	$ 500,000,000	$ 500,000,000
Interest rate	4.25%	4.25%	4.25%
Senior Notes due 2029 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Long term debt	$ 500,000,000	$ 500,000,000	$ 500,000,000
Interest rate	3.50%	3.50%	3.50%
Senior Notes due 2030 | Senior Notes [Member]
Debt Instrument [Line Items]
Long term debt	$ 600,000,000	$ 600,000,000	$ 600,000,000
Interest rate	2.60%	2.60%	2.60%
Senior Notes due 2032 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Long term debt	$ 650,000,000	$ 650,000,000	$ 650,000,000
Interest rate	2.20%	2.20%
Senior Notes due 2050 | Senior Notes [Member]
Debt Instrument [Line Items]
Long term debt	$ 500,000,000	$ 500,000,000	$ 500,000,000
Interest rate	3.05%	3.05%	3.05%
Senior Notes due 2052 | Senior Notes [Member]
Debt Instrument [Line Items]
Long term debt	$ 850,000,000	$ 850,000,000	$ 850,000,000
Interest rate	2.95%	2.95%	2.95%
Notes Payable to Sellers and Other Third Parties [Member]
Debt Instrument [Line Items]
Long term debt	$ 37,232,000	$ 36,049,000	$ 37,508,000
Notes Payable to Sellers and Other Third Parties [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate	2.42%	2.42%
Notes Payable to Sellers and Other Third Parties [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate	10.35%	10.35%

Long-Term Debt (Details of the

Long-Term Debt (Details of the Company's Credit Agreement) (Details) - Credit Agreement [Member] - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Available	$ 1,159,902	$ 1,193,502	$ 933,775
Amount drawn	$ 650,587	$ 614,705	$ 803,944
Commitment - rate applicable	0.09%	0.09%	0.09%
Letter of Credit [Member]
Line of Credit Facility [Line Items]
Letter of credit	$ 39,511	$ 41,793	$ 112,281
SOFR [Member]
Line of Credit Facility [Line Items]
Margin rate for loans		0.10%
SOFR [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Amount drawn		$ 391,000
Interest rate applicable		5.42%
Margin rate for loans		1%
SOFR [Member] | Term Loan Facility
Line of Credit Facility [Line Items]
Amount drawn	$ 650,000	$ 650,000
Interest rate applicable	5.77%	5.42%
Margin rate for loans		1%
LIBOR [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Amount drawn			$ 631,000
Interest rate applicable			1.10%
Margin rate for loans			1%
LIBOR [Member] | Term Loan Facility
Line of Credit Facility [Line Items]
Amount drawn			$ 650,000
Interest rate applicable			1.10%
Margin rate for loans			1.20%
Base Rate [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Amount drawn			$ 158,000
Interest rate applicable			3.25%
Margin rate for loans			0%
US Swing Line Loan [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Amount drawn			$ 11,000
Interest rate applicable			3.25%
Margin rate for loans			0%
Canadian Bankers Acceptance Loan [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Amount drawn	$ 210,587	$ 223,705	$ 3,944
Interest rate applicable	5.92%	5.74%	1.45%
Margin rate for loans		1%	1%

Long-Term Debt - Details of the

Long-Term Debt - Details of the Company's Credit Agreement (Details) - Credit Agreement [Member] - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Available	$ 1,159,902	$ 1,193,502	$ 933,775
Commitment - rate applicable	0.09%	0.09%	0.09%
Amount drawn	$ 650,587	$ 614,705	$ 803,944
Letter of Credit [Member]
Line of Credit Facility [Line Items]
Letter of credit	$ 39,511	$ 41,793	$ 112,281
Base Rate [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Interest rate applicable			3.25%
Margin rate for loans			0%
Amount drawn			$ 158,000
LIBOR [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Interest rate applicable			1.10%
Margin rate for loans			1%
Amount drawn			$ 631,000
LIBOR [Member] | Term Loan Facility
Line of Credit Facility [Line Items]
Interest rate applicable			1.10%
Margin rate for loans			1.20%
Amount drawn			$ 650,000
Canadian Bankers Acceptance Loan [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Interest rate applicable	5.92%	5.74%	1.45%
Margin rate for loans		1%	1%
Amount drawn	$ 210,587	$ 223,705	$ 3,944

Long-Term Debt - Future Princip

Long-Term Debt - Future Principal Payments (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Long-Term Debt [Abstract]
2023		$ 6,759
2024		10,636
2025		7,112
2026		2,071,152
2027		5,179
Thereafter		4,862,563
Total debt and lease obligations	$ 6,997,427	$ 6,963,401	$ 5,101,971

Fair Value of Financial Instr_6

Fair Value of Financial Instruments - Carrying Values and Fair Values of Debt Instruments (Details) - Senior Notes [Member] - USD ($)	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Aug. 31, 2021	Apr. 01, 2021
Senior Notes due 2021 [Member]
Debt Instrument [Line Items]
Carrying value of senior notes					$ 100,000,000
New Senior Notes due 2021 [Member]
Debt Instrument [Line Items]
Carrying value of senior notes				$ 150,000,000
Senior Notes due 2022 [Member]
Debt Instrument [Line Items]
Carrying value of senior notes				125,000,000
Senior Notes due 2023 [Member]
Debt Instrument [Line Items]
Carrying value of senior notes				200,000,000
Senior Notes due 2024 [Member]
Debt Instrument [Line Items]
Carrying value of senior notes				150,000,000
Senior Notes due 2025 [Member]
Debt Instrument [Line Items]
Carrying value of senior notes				375,000,000
Senior Notes due 2026 [Member]
Debt Instrument [Line Items]
Carrying value of senior notes				400,000,000
Senior Notes due 2027 [Member]
Debt Instrument [Line Items]
Carrying value of senior notes				$ 250,000,000
Senior Notes due 2028 [Member]
Debt Instrument [Line Items]
Carrying value of senior notes	$ 500,000,000	$ 500,000,000	$ 500,000,000
Fair value of senior notes	$ 491,500,000	$ 470,850,000	$ 561,350,000
Interest rate	4.25%	4.25%	4.25%
Senior Notes due 2029 [Member]
Debt Instrument [Line Items]
Carrying value of senior notes	$ 500,000,000	$ 500,000,000	$ 500,000,000
Fair value of senior notes	$ 466,350,000	$ 457,650,000	$ 539,500,000
Interest rate	3.50%	3.50%	3.50%
Senior Notes due 2030
Debt Instrument [Line Items]
Carrying value of senior notes	$ 600,000,000	$ 600,000,000	$ 600,000,000
Fair value of senior notes	$ 525,060,000	$ 510,540,000	$ 610,440,000
Interest rate	2.60%	2.60%	2.60%
Senior Notes due 2032 [Member]
Debt Instrument [Line Items]
Carrying value of senior notes	$ 650,000,000	$ 650,000,000	$ 650,000,000
Fair value of senior notes	$ 529,490,000	$ 514,540,000	637,065,000
Interest rate	2.20%	2.20%
New Senior Notes due 2032 [Member]
Debt Instrument [Line Items]
Carrying value of senior notes	$ 500,000,000	$ 500,000,000	0
Fair value of senior notes	$ 444,800,000	$ 429,000,000	0
Interest rate	3.20%	3.20%
Senior Notes due 2033 [Member]
Debt Instrument [Line Items]
Carrying value of senior notes	$ 750,000,000	$ 750,000,000	0
Fair value of senior notes	$ 718,275,000	$ 699,450,000	0
Interest rate	4.20%	4.20%
Senior Notes due 2050
Debt Instrument [Line Items]
Carrying value of senior notes	$ 500,000,000	$ 500,000,000	500,000,000
Fair value of senior notes	$ 341,300,000	$ 343,300,000	$ 496,350,000
Interest rate	3.05%	3.05%	3.05%
Senior Notes due 2052
Debt Instrument [Line Items]
Carrying value of senior notes	$ 850,000,000	$ 850,000,000	$ 850,000,000
Fair value of senior notes	$ 570,435,000	$ 561,425,000	$ 828,580,000
Interest rate	2.95%	2.95%	2.95%

Fair Value Measurements (Asse_2

Fair Value Measurements (Assets and Liabilities Measured at Fair Value on Recurring Basis) (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted cash	$ 106,625	$ 102,727	$ 72,174
Contingent consideration			(31,616)
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted cash	106,625	102,727	72,174
Restricted investments	72,784	66,402	58,797
Contingent consideration	(85,822)	(81,415)	(94,308)
Fair Value, Measurements, Recurring [Member] | Interest Rate Swap [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative instrument - net	24,427	31,807	(51,081)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted cash	106,625	102,727	72,174
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted investments	72,784	66,402	58,797
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative instrument - net	24,427	31,807	(51,081)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration	$ (85,822)	$ (81,415)	$ (94,308)

10-K Fair Value of Financial _3

10-K Fair Value of Financial Instruments - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted cash	$ 106,625	$ 102,727	$ 72,174
Contingent consideration			(31,616)
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted cash	106,625	102,727	72,174
Restricted investments	72,784	66,402	58,797
Contingent consideration	(85,822)	(81,415)	(94,308)
Fair Value, Measurements, Recurring [Member] | Interest Rate Swap [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative instrument - net	24,427	31,807	(51,081)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted cash	106,625	102,727	72,174
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted investments	72,784	66,402	58,797
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative instrument - net	24,427	31,807	(51,081)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration	$ (85,822)	$ (81,415)	$ (94,308)

Fair Value Measurements (Fair_2

Fair Value Measurements (Fair Value for Level 3 Liabilities) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	$ 81,415	$ 94,308	$ 94,308	$ 71,736
Contingent consideration recorded at acquisition date	6,000	5,000	6,642	31,616
Payment of contingent consideration recorded at acquisition date	(1,319)	(3,571)	(16,911)	(12,934)
Payment of contingent consideration recorded in earnings			(2,982)	(520)
Adjustments to contingent consideration	(637)	(52)	(1,030)	2,954	$ 18,418
Interest accretion expense	363	353	1,417	1,470
Foreign currency translation adjustment			(29)	(14)
Ending balance	$ 85,822	$ 96,038	$ 81,415	$ 94,308	$ 71,736
Payment of contingent consideration recorded in earnings, location			Impairments and other operating items

Derivative Financial Instrume_4

Derivative Financial Instruments - Cash Flow Hedges Impact on Financial Results (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized as AOCIL on Derivatives, Net of Tax	$ 2,425	$ (32,854)	$ (56,107)	$ (17,116)	$ 47,528
Amounts reclassified into earnings, net of taxes	(2,999)	3,491	4,815	14,936	7,187
Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized as AOCIL on Derivatives, Net of Tax	2,425	(32,854)	(56,107)	(17,116)	47,528
Amounts reclassified into earnings, net of taxes	(2,999)	3,491	(4,815)	(14,936)	(7,187)
Cash Flow Hedging [Member] | Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amounts reclassified into earnings, net of taxes	(2,999)	3,491	(4,815)	(14,936)	(7,187)
Cash Flow Hedging [Member] | Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized as AOCIL on Derivatives, Net of Tax	$ 2,425	$ 32,854	$ (56,107)	$ (17,116)	$ 47,528

10-K Fair Value of Financial _4

10-K Fair Value of Financial Instruments - Level 3 Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Beginning balance	$ 81,415	$ 94,308	$ 94,308	$ 71,736
Contingent consideration recorded at acquisition date	6,000	5,000	6,642	31,616
Payment of contingent consideration recorded at acquisition date	(1,319)	(3,571)	(16,911)	(12,934)
Payment of contingent consideration recorded in earnings			$ (2,982)	(520)
Payment of contingent consideration recorded in earnings, location			Impairments and other operating items
Adjustments to contingent consideration	(637)	(52)	$ (1,030)	2,954	$ 18,418
Interest accretion expense	363	353	1,417	1,470
Foreign currency translation adjustment			(29)	(14)
Ending balance	$ 85,822	$ 96,038	$ 81,415	$ 94,308	$ 71,736

Commitments and Contingencies_5

Commitments and Contingencies - Narrative (Details) T in Millions				7 Months Ended	12 Months Ended
	Aug. 10, 2018 USD ($)	Jul. 17, 2018 USD ($)	Mar. 06, 2018 USD ($)	Jul. 25, 2017 USD ($)	Dec. 31, 2022 USD ($) T	Mar. 31, 2023 USD ($)
Contingencies And Commitments [Line Items]
Threshold used for disclosing environmental matters involving potential monetary sanctions					$ 1,000,000	$ 1,000,000
Minimum required threshold for disclosing environmental matters involving potential monetary sanctions					$ 300,000
Bridge and Thoroughfare Fee [Member]
Contingencies And Commitments [Line Items]
Loss contingency amount sought		$ 11,600,000	$ 83,000	$ 11,600,000
Noncompliance fee			$ 750
Chiquita Canyon, LLC [Member]
Contingencies And Commitments [Line Items]
Annual tons of waste accepted at landfill | T					2.6
Estimate of total new fees and other new taxes over the life of the conditional use permit					$ 300,000,000	$ 300,000,000
Penalties [Member] | Bridge and Thoroughfare Fee [Member]
Contingencies And Commitments [Line Items]
Fee paid	$ 83,000
Fees [Member] | Bridge and Thoroughfare Fee [Member]
Contingencies And Commitments [Line Items]
Fee paid	$ 750

Commitments and Contingencies_6

Commitments and Contingencies - Narrative (Details) gal in Millions, T in Millions				7 Months Ended	12 Months Ended
	Aug. 10, 2018 USD ($)	Jul. 17, 2018 USD ($)	Mar. 06, 2018 USD ($)	Jul. 25, 2017 USD ($)	Dec. 31, 2022 USD ($) agreement T gal	Mar. 31, 2023 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Contingencies And Commitments [Line Items]
Amount of surety bonds to secure asset closure and retirement requirements					$ 811,243,000		$ 744,037,000
Amount of surety bonds to secure performance under collection contracts and landfill operating agreements					$ 636,224,000		556,570,000
Percentage of interest in company that issues financial surety bonds					9.90%
Outstanding amount of financial surety bonds					$ 424,379,000		410,378,000
Purchase Obligation					112,136,000		100,220,000	$ 93,813,000
Environmental remediation reserve - current portion					3,165,000		2,300,000
Environmental remediation reserve-Non-current portion					$ 17,284,000		$ 20,483,000
Environmental Loss Contingency, Noncurrent, Statement of Financial Position [Extensible Enumeration]					Other Liabilities Noncurrent		Other Liabilities Noncurrent
Unrecorded unconditional purchase obligation, remaining volume | gal					57.9
Purchase commitment					$ 184,918,000
Minimum required threshold for disclosing environmental matters involving potential monetary sanctions					300,000
Threshold used for disclosing environmental matters involving potential monetary sanctions					$ 1,000,000	$ 1,000,000
Number of collective bargaining agreements expired or set to expire | agreement					17
Bridge and Thoroughfare Fee [Member]
Contingencies And Commitments [Line Items]
Loss contingency amount sought		$ 11,600,000	$ 83,000	$ 11,600,000
Noncompliance fee			$ 750
Chiquita Canyon, LLC [Member]
Contingencies And Commitments [Line Items]
Annual tons of waste accepted at landfill | T					2.6
Estimate of total new fees and other new taxes over the life of the conditional use permit					$ 300,000,000	$ 300,000,000
Penalties [Member] | Bridge and Thoroughfare Fee [Member]
Contingencies And Commitments [Line Items]
Fee paid	$ 83,000
Monthly payment estimate	83,000
Fees [Member] | Bridge and Thoroughfare Fee [Member]
Contingencies And Commitments [Line Items]
Fee paid	750
Monthly payment estimate	$ 750

Commitments and Contingencies_7

Commitments and Contingencies - Future Minimum Purchase Commitments (Details) $ in Thousands	Dec. 31, 2022 USD ($)
Commitments and Contingencies [Abstract]
2023	$ 149,858
2024	35,060
Total purchase commitment	$ 184,918

Shareholders' Equity - Narrat_2

Shareholders' Equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended		3 Months Ended		5 Months Ended	6 Months Ended	7 Months Ended	12 Months Ended			72 Months Ended	79 Months Ended
	Nov. 30, 2022	Oct. 31, 2022	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Jul. 31, 2022	Dec. 31, 2016	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2022	Dec. 31, 2022	Jul. 26, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of shares under employee share purchase plan			$ 1,841	$ 1,554				$ 3,270	$ 1,222
Issuance of shares under employee share purchase plan, shares			14,594	12,015				26,582	10,813
Maximum number of shares authorized for repurchase													12,859,066
Share repurchase plan expiration date			Aug. 09, 2023		Aug. 09, 2023
Daily repurchase of shares, maximum						85,956
Average daily trading volume during period						343,825
Repurchase of common stock (shares)			0	3,388,155				3,388,155	3,003,822	1,271,977
Aggregate cost of stock repurchased				$ 424,999				$ 424,999	$ 338,993	$ 105,654
Maximum remaining number of shares available for repurchase			12,859,066		12,859,066			12,859,066			12,859,066	12,859,066
Cash dividend per share	$ 0.255	$ 0.23	$ 0.255	$ 0.230				$ 0.945	$ 0.845	$ 0.760
Cash dividend per common share, increase	$ 0.025
Cash dividends on common stock			$ 65,788	$ 59,391				$ 243,013	$ 220,203	$ 199,883
Employee Share Purchase Plan 2020 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum percent of eligible compensation to purchase shares			1%		1%			1%			1%	1%
Maximum percent of eligible compensation to purchase shares			10%		10%			10%			10%	10%
Maximum number of share authorized to be issued under plan			1,000,000		1,000,000			1,000,000			1,000,000	1,000,000
Minimum [Member] | Employee Share Purchase Plan 2020 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price percentage of closing price of common shares			85%					85%
Maximum [Member] | Employee Share Purchase Plan 2020 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price percentage of closing price of common shares			95%					95%
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant-date fair value of award			$ 133.46					$ 121.26	$ 100.27	$ 101.79
Units granted in period			403,026					483,281
Vested deferred RSUs outstanding			62,201	81,712	81,352			81,352	100,861	177,760	81,352	81,352
Restricted Stock Units (RSUs) [Member] | Progressive Waste Solutions Ltd. [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units granted in period			0				0				0
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant-date fair value of award			$ 133.30					$ 117.94	$ 96.99	$ 87.19
Units granted in period			105,581					95,038
Performance Shares [Member] | Two Thousand Twenty One Performance-Based Restricted Share Units, Plan One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of award									3 years
Performance period end date									Dec. 31, 2023
Performance Shares [Member] | Two Thousand Twenty Two Performance-Based Restricted Share Units, Plan One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of award								3 years
Performance period end date								Dec. 31, 2024
Performance Shares [Member] | 2020 Performance-Based Restricted Share Units Plan One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of award										3 years
Performance period end date										Dec. 31, 2022
Performance Shares [Member] | 2020 Performance-Based Restricted Share Units Plan Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of award										3 years
Performance Shares [Member] | Minimum [Member] | 2020 Performance-Based Restricted Share Units Plan Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of award										1 year
Performance Shares [Member] | Maximum [Member] | 2020 Performance-Based Restricted Share Units Plan Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of award										4 years
Employee Stock Option [Member] | Progressive Waste Solutions Ltd. [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted in period			0				0				0
Deferred Share Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant-date fair value of award			$ 136.47					$ 121	$ 99.80	$ 103.81
Units granted in period			3,945					2,094
Vested deferred RSUs outstanding			30,481		26,536			26,536	24,442		26,536	26,536
Progressive Waste Solutions Ltd. [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested deferred RSUs outstanding			52,026		57,829			57,829	63,032		57,829	57,829
Progressive Waste Solutions Ltd. [Member] | Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted in period												0

10-K Shareholders' Equity - Nar

10-K Shareholders' Equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended		3 Months Ended		5 Months Ended	6 Months Ended	7 Months Ended	12 Months Ended			36 Months Ended	72 Months Ended	79 Months Ended
	Nov. 30, 2022	Oct. 31, 2022	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Jul. 31, 2022	Dec. 31, 2016	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2022	Dec. 31, 2022	Dec. 31, 2022	Jul. 26, 2022	Jun. 01, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Repurchase of common stock (shares)			0	3,388,155				3,388,155	3,003,822	1,271,977
Aggregate cost of stock repurchased				$ 424,999				$ 424,999	$ 338,993	$ 105,654
Aggregate cost of common stock repurchase
Treasury shares: 59,656 and 65,459 shares at March 31, 2023 and December 31, 2022, respectively
Cash dividend per share	$ 0.255	$ 0.23	$ 0.255	$ 0.230				$ 0.945	$ 0.845	$ 0.760
Cash dividend per common share, increase	$ 0.025
Cash dividends on common stock			$ 65,788	$ 59,391				$ 243,013	$ 220,203	$ 199,883
Maximum remaining number of shares available for repurchase			12,859,066		12,859,066			12,859,066			12,859,066	12,859,066	12,859,066
Maximum number of shares authorized for repurchase														12,859,066
Share repurchase plan expiration date			Aug. 09, 2023		Aug. 09, 2023
Daily repurchase of shares, maximum						85,956
Daily Shares Repurchase (as percentage)			25%		25%			25%			25%	25%	25%
Average daily trading volume during period						343,825
Common shares, shares issued			257,547,090		257,211,175			257,211,175	260,283,158		257,211,175	257,211,175	257,211,175
Preferred stock, shares issued					0			0			0	0	0
Issuance of shares under employee share purchase plan, shares			14,594	12,015				26,582	10,813
Issuance of shares under employee share purchase plan			$ 1,841	$ 1,554				$ 3,270	$ 1,222
Employee Share Purchase Plan 2020 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum percent of eligible compensation to purchase shares			1%		1%			1%			1%	1%	1%
Maximum percent of eligible compensation to purchase shares			10%		10%			10%			10%	10%	10%
Maximum number of share authorized to be issued under plan			1,000,000		1,000,000			1,000,000			1,000,000	1,000,000	1,000,000
2016 Incentive Award Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of share authorized to be issued under plan					7,500,000			7,500,000			7,500,000	7,500,000	7,500,000
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrant expiration								2023
Minimum [Member] | Employee Share Purchase Plan 2020 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price percentage of closing price of common shares			85%					85%
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrant expiration								2027
Maximum [Member] | Employee Share Purchase Plan 2020 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price percentage of closing price of common shares			95%					95%
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested deferred RSUs outstanding			62,201	81,712	81,352			81,352	100,861	177,760	81,352	81,352	81,352
Restricted Stock Units (RSUs) [Member] | 2004 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted in period											0
Restricted Stock Units (RSUs) [Member] | Progressive Waste Solutions Ltd. [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted in period													0
Performance Shares [Member] | Two Thousand Twenty One Performance-Based Restricted Share Units, Plan One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of award									3 years
Performance period end date									Dec. 31, 2023
Performance Shares [Member] | 2020 Performance-Based Restricted Share Units Plan One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of award										3 years
Performance period end date										Dec. 31, 2022
Performance Shares [Member] | 2020 Performance-Based Restricted Share Units Plan Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of award										3 years
Performance Shares [Member] | Minimum [Member] | 2020 Performance-Based Restricted Share Units Plan Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of award										1 year
Performance Shares [Member] | Maximum [Member] | 2020 Performance-Based Restricted Share Units Plan Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of award										4 years
Special Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares, shares issued					0			0			0	0	0
Deferred Share Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested deferred RSUs outstanding			30,481		26,536			26,536	24,442		26,536	26,536	26,536
Employee Stock Option [Member] | Progressive Waste Solutions Ltd. [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted in period			0				0					0
Restricted Share Units and Deferred Share Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Sale of common shares held in trust, shares								5,203	3,522	7,330
Restricted Share Units and Deferred Share Units [Member] | Progressive Waste Solutions Ltd. [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Acquired common shares held in trust					65,459			65,459			65,459	65,459	65,459		735,171
Progressive Waste Solutions Ltd. [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested deferred RSUs outstanding			52,026		57,829			57,829	63,032		57,829	57,829	57,829
Progressive Waste Solutions Ltd. [Member] | Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted in period													0

Shareholders' Equity - Summar_3

Shareholders' Equity - Summary of Activity Related to Restricted Stock Units (Details) - shares	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Restricted Stock Units (RSUs) [Member]
Unvested shares
Outstanding at beginning	81,352	100,861
Outstanding, shares at beginning	955,999	861,695
Granted	403,026	483,281
Forfeited	(13,835)	(70,126)
Vested and issued	(325,490)	(318,851)
Outstanding at ending	62,201	81,352
Outstanding, shares at ending	1,019,700	955,999
Performance Shares [Member]
Unvested shares
Outstanding, shares at beginning	341,850	392,043
Granted	105,581	95,038
Forfeited		(87,554)
Vested and issued	(140,498)	(57,677)
Outstanding, shares at ending	306,933	341,850
Progressive Waste Solutions Ltd. [Member] | Restricted Stock Units (RSUs) [Member]
Unvested shares
Outstanding at beginning	57,829	63,032
Cash settled	(5,803)	(5,203)
Outstanding at ending	52,026	57,829

10-K Shareholders' Equity - Com

10-K Shareholders' Equity - Common Stock Shares Reserved for Issuances (Details)	Dec. 31, 2022 shares
Class Of Stock [Line Items]
Shares reserved for issuance	6,444,783
Restricted Stock Units Performance Share Units and Warrants [Member]
Class Of Stock [Line Items]
Shares reserved for issuance	2,233,831
2016 Incentive Award Plan [Member]
Class Of Stock [Line Items]
Shares reserved for issuance	3,262,941
Employee Share Purchase Plan 2020 [Member]
Class Of Stock [Line Items]
Shares reserved for issuance	948,011

Shareholders' Equity - Summar_4

Shareholders' Equity - Summary of Warrant and Deferred Share Unit Activity (Details) - Deferred Share Units [Member] - shares	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Warrant
Outstanding at beginning	26,536	24,442
Granted	3,945	2,094
Outstanding at ending	30,481	26,536

10-K Shareholders' Equity (Rest

10-K Shareholders' Equity (Restricted Stock Units Activity) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Restricted Stock Units (RSUs) [Member]
Schedule of Share based Compensation Arrangements by Share based Payment Award, Equity Instruments, Other Than Options, Restricted Stock Units [Line Items]
Stock units granted	403,026	483,281
Weighted average grant-date fair value of award	$ 133.46	$ 121.26	$ 100.27	$ 101.79
Total fair value of share units vested		$ 28,751	$ 26,711	$ 23,742
Performance Shares [Member]
Schedule of Share based Compensation Arrangements by Share based Payment Award, Equity Instruments, Other Than Options, Restricted Stock Units [Line Items]
Stock units granted	105,581	95,038
Weighted average grant-date fair value of award	$ 133.30	$ 117.94	$ 96.99	$ 87.19
Total fair value of share units vested		$ 4,674	$ 10,954	$ 15,628
Deferred Share Units [Member]
Schedule of Share based Compensation Arrangements by Share based Payment Award, Equity Instruments, Other Than Options, Restricted Stock Units [Line Items]
Stock units granted	3,945	2,094
Weighted average grant-date fair value of award	$ 136.47	$ 121	$ 99.80	$ 103.81
Total fair value of share units awarded		$ 253	$ 285	$ 272

Shareholders' Equity - Summar_5

Shareholders' Equity - Summary of Vesting Activity Related to Restricted Share Units (Details) - Restricted Stock Units (RSUs) [Member] - shares	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vested over remaining service period	325,490	318,851
Forfeited	(13,835)	(70,126)
Progressive Waste Solutions Ltd. [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Cash settled	(5,803)	(5,203)

10-K Shareholders' Equity (Summ

10-K Shareholders' Equity (Summary of Activity Related to Restricted Stock Units) (Details) - $ / shares	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Restricted Stock Units (RSUs) [Member]
Unvested shares
Outstanding at beginning	81,352	100,861	177,760
Outstanding, shares at beginning	955,999	861,695
Granted	403,026	483,281
Forfeited	(13,835)	(70,126)
Vested and issued	325,490	318,851
Outstanding at ending	62,201	81,352	100,861	177,760
Outstanding, shares at ending	1,019,700	955,999	861,695
Weighted-Average Grant Date Fair Value Per Share
Outstanding, beginning balance	$ 109.29	$ 95.63
Granted	$ 133.46	121.26	$ 100.27	$ 101.79
Forfeited		110.86
Vested and Issued		90.17
Outstanding, ending balance		$ 109.29	$ 95.63
Performance Shares [Member]
Unvested shares
Outstanding, shares at beginning	341,850	392,043
Granted	105,581	95,038
Forfeited		(87,554)
Vested and issued	140,498	57,677
Outstanding, shares at ending	306,933	341,850	392,043
Weighted-Average Grant Date Fair Value Per Share
Outstanding, beginning balance	$ 103.53	$ 91.63
Granted	$ 133.30	117.94	$ 96.99	87.19
Forfeited		80.70
Vested and Issued		81.04
Outstanding, ending balance		$ 103.53	$ 91.63
Deferred Share Units [Member]
Unvested shares
Outstanding at beginning	26,536	24,442
Granted	3,945	2,094
Outstanding at ending	30,481	26,536	24,442
Weighted-Average Grant Date Fair Value Per Share
Outstanding, beginning balance	$ 68.55	$ 64.05
Granted	$ 136.47	121	$ 99.80	$ 103.81
Outstanding, ending balance		$ 68.55	$ 64.05
Progressive Waste Solutions Ltd. [Member] | Restricted Stock Units (RSUs) [Member]
Unvested shares
Outstanding at beginning	57,829	63,032
Cash settled	(5,803)	(5,203)
Outstanding at ending	52,026	57,829	63,032

Shareholders' Equity - Summar_6

Shareholders' Equity - Summary of Stock Option Activity and Related Information (Details) - Progressive Waste Solutions Ltd. [Member] - shares	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Number of Shares (Options)
Outstanding at beginning	43,570	45,869
Cash settled	0	(2,299)
Outstanding at ending	43,570	43,570

10-K Shareholders' Equity (Su_2

10-K Shareholders' Equity (Summary of Warrant Activity) (Details) - Stock Purchase Warrants - $ / shares	12 Months Ended
	Dec. 31, 2022
Warrant
Outstanding at beginning	578,405
Granted	380,478
Forfeited	(65,331)
Exercised	(38,922)
Outstanding at ending	854,630
Weighed Average Exercise Price
Outstanding beginning balance	$ 104.82
Granted	138.33
Forfeited	80.49
Exercised	78.24
Outstanding ending balance	$ 122.81

10-K Shareholders' Equity (Su_3

10-K Shareholders' Equity (Summarized Information about Warrants Outstanding) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Class of Warrant or Right [Line Items]
Outstanding, ending balance	854,630	578,405
Stock Purchase Warrants 2017 Issuance [Member]
Class of Warrant or Right [Line Items]
Grant date	2017
Warrants issued	35,382
Exercise price, lower limit	$ 53.65
Exercise price, upper limit	$ 69.96
Fair value of warrants issued	$ 595
Outstanding, ending balance	0	1,521
Stock Purchase Warrants 2018 Issuance [Member]
Class of Warrant or Right [Line Items]
Grant date	2018
Warrants issued	163,995
Exercise price, lower limit	$ 70.91
Exercise price, upper limit	$ 80.90
Fair value of warrants issued	$ 2,591
Outstanding, ending balance	45,024	112,756
Stock Purchase Warrants 2019 Issuance [Member]
Class of Warrant or Right [Line Items]
Grant date	2019
Warrants issued	151,008
Exercise price, lower limit	$ 74.25
Exercise price, upper limit	$ 95.61
Fair value of warrants issued	$ 2,634
Outstanding, ending balance	66,977	101,977
Stock Purchase Warrants 2020 Issuance [Member]
Class of Warrant or Right [Line Items]
Grant date	2020
Warrants issued	164,890
Exercise price, lower limit	$ 72.65
Exercise price, upper limit	$ 104.89
Fair value of warrants issued	$ 3,140
Outstanding, ending balance	146,386	146,386
Stock Purchase Warrants 2021 Issuance [Member]
Class of Warrant or Right [Line Items]
Grant date	2021
Warrants issued	218,166
Exercise price, lower limit	$ 99.33
Exercise price, upper limit	$ 135.97
Fair value of warrants issued	$ 5,584
Outstanding, ending balance	215,765	215,765
Stock Purchase Warrants 2022 Issuance [Member]
Class of Warrant or Right [Line Items]
Grant date	2022
Warrants issued	380,478
Exercise price, lower limit	$ 125.32
Exercise price, upper limit	$ 143.95
Fair value of warrants issued	$ 12,972
Outstanding, ending balance	380,478	0

10-K Shareholders' Equity (Su_4

10-K Shareholders' Equity (Summary of Vesting Activity Related to Restricted Share Units) (Details) - shares	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Restricted Stock Units (RSUs) [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Forfeited	(13,835)	(70,126)
Restricted Stock Units (RSUs) [Member] | Progressive Waste Solutions Ltd. [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Cash settled	(5,803)	(5,203)
Performance Shares [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Forfeited		(87,554)

10-K Shareholders' Equity (Su_5

10-K Shareholders' Equity (Summary of Stock Option Activity and Related Information) (Details) - Progressive Waste Solutions Ltd. [Member] - shares	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Number of Shares (Options)
Outstanding at beginning	43,570	45,869
Cash settled	0	(2,299)
Outstanding at ending	43,570	43,570

Other Comprehensive Income (L_7

Other Comprehensive Income (Loss) (Components of Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amounts reclassified into earnings, net of taxes	$ (2,999)	$ 3,491	$ 4,815	$ 14,936	$ 7,187
Amount of Gain or (Loss) Recognized as AOCIL on Derivatives, Net of Tax	(2,425)	32,854	56,107	17,116	(47,528)
Foreign currency translation adjustment, gross	1,682	34,429	(157,336)	8,183	50,653
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Total	1,682	34,429	(157,336)	8,183	50,653
Other Comprehensive Income (Loss), before Tax	(5,697)	83,878	(74,449)	51,791	(4,233)
Other Comprehensive Income (Loss), Tax	1,955	(13,104)	(21,965)	(11,556)	14,545
Other comprehensive income (loss), net of tax	(3,742)	70,774	(96,414)	40,235	10,312
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amounts reclassified into earnings, net of taxes	(2,999)	3,491	4,815	14,936	7,187
Amount of Gain or (Loss) Recognized as AOCIL on Derivatives, Net of Tax	(2,425)	32,854	56,107	17,116	(47,528)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Total	1,682	34,429	(157,336)	8,183	50,653
Interest Rate Swap [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Interest rate swap amounts reclassified into interest expense	(4,080)	4,750	6,551	20,321	9,778
Amounts reclassified, tax	1,081	(1,259)	1,736	5,385	2,591
Amounts reclassified into earnings, net of taxes	(2,999)	3,491	(4,815)	(14,936)	(7,187)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax	(3,299)	44,699	76,336	23,287	(64,664)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax	874	(11,845)	(20,229)	(6,171)	17,136
Amount of Gain or (Loss) Recognized as AOCIL on Derivatives, Net of Tax	$ (2,425)	$ 32,854	$ 56,107	$ 17,116	$ (47,528)

10-K Other Comprehensive Income

10-K Other Comprehensive Income (Loss) (Components of Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Components of Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation adjustment, gross	$ 1,682	$ 34,429	$ (157,336)	$ 8,183	$ 50,653
Foreign currency translation adjustment, net	$ 1,682	$ 34,429	$ (157,336)	$ 8,183	$ 50,653

10-K Other Comprehensive Inco_2

10-K Other Comprehensive Income (Loss) - Components of Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amount of Gain or (Loss) Recognized from AOCIL into Earnings, Net of Tax	$ 2,999	$ (3,491)	$ (4,815)	$ (14,936)	$ (7,187)
Amount of Gain or (Loss) Recognized as AOCIL on Derivatives, Net of Tax	(2,425)	32,854	56,107	17,116	(47,528)
Foreign currency translation adjustment, gross	1,682	34,429	(157,336)	8,183	50,653
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Total	1,682	34,429	(157,336)	8,183	50,653
Other Comprehensive Income (Loss), before Tax	(5,697)	83,878	(74,449)	51,791	(4,233)
Other Comprehensive Income (Loss), Tax	(1,955)	13,104	21,965	11,556	(14,545)
Other comprehensive income (loss), net of tax	(3,742)	70,774	(96,414)	40,235	10,312
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amount of Gain or (Loss) Recognized from AOCIL into Earnings, Net of Tax	2,999	(3,491)	(4,815)	(14,936)	(7,187)
Amount of Gain or (Loss) Recognized as AOCIL on Derivatives, Net of Tax	(2,425)	32,854	56,107	17,116	(47,528)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Total	1,682	34,429	(157,336)	8,183	50,653
Interest Rate Swap [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Interest rate swap amounts reclassified into interest expense	(4,080)	4,750	6,551	20,321	9,778
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax	(1,081)	1,259	(1,736)	(5,385)	(2,591)
Amount of Gain or (Loss) Recognized from AOCIL into Earnings, Net of Tax	2,999	(3,491)	4,815	14,936	7,187
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax	(3,299)	44,699	76,336	23,287	(64,664)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax	874	(11,845)	(20,229)	(6,171)	17,136
Amount of Gain or (Loss) Recognized as AOCIL on Derivatives, Net of Tax	$ (2,425)	$ 32,854	$ 56,107	$ 17,116	$ (47,528)

Other Comprehensive Income (L_8

Other Comprehensive Income (Loss) (Amounts Included in Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Components of Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity Attributable to Parent, Beginning Balance	$ 7,108,698	$ 6,988,938	$ 6,988,938
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	1,682	34,429	(157,336)	$ 8,183	$ 50,653
Stockholders' Equity Attributable to Parent, Ending Balance	7,233,995		7,108,698	6,988,938
Foreign currency translation adjustment	1,682	34,429	(157,336)	8,183	50,653
Accumulated Other Comprehensive Income (Loss) [Member]
Components of Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity Attributable to Parent, Beginning Balance	(56,830)	39,584	39,584	(651)
Amounts reclassified into earnings	(2,999)	(3,491)	4,815	14,936
Change in fair value	(2,425)	32,854	56,107	17,116
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	1,682	34,429	(157,336)	8,183	50,653
Stockholders' Equity Attributable to Parent, Ending Balance	(60,572)	110,358	(56,830)	39,584	(651)
Foreign currency translation adjustment	1,682	34,429	(157,336)	8,183	50,653
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] | Interest Rate Swap [Member]
Components of Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity Attributable to Parent, Beginning Balance	23,378	(37,544)	(37,544)	(69,596)
Amounts reclassified into earnings	(2,999)	(3,491)	4,815	14,936
Change in fair value	(2,425)	32,854	56,107	17,116
Stockholders' Equity Attributable to Parent, Ending Balance	17,954	(1,199)	23,378	(37,544)	(69,596)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] | Foreign Currency Translation Adjustment [Member]
Components of Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity Attributable to Parent, Beginning Balance	(80,208)	77,128	77,128	68,945
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	1,682	34,429	(157,336)	8,183
Stockholders' Equity Attributable to Parent, Ending Balance	(78,526)	111,557	(80,208)	77,128	$ 68,945
Foreign currency translation adjustment	$ 1,682	$ 34,429	$ (157,336)	$ 8,183

10-K Other Comprehensive Inco_3

10-K Other Comprehensive Income (Loss) (Amounts Included in Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Components of Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation adjustment	$ 1,682	$ 34,429	$ (157,336)	$ 8,183	$ 50,653

10-K Other Comprehensive Inco_4

10-K Other Comprehensive Income (Loss) - Amounts Included in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Components of Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity Attributable to Parent, Beginning Balance	$ 7,108,698	$ 6,988,938	$ 6,988,938
Foreign currency translation adjustment	1,682	34,429	(157,336)	$ 8,183	$ 50,653
Stockholders' Equity Attributable to Parent, Ending Balance	7,233,995		7,108,698	6,988,938
Accumulated Other Comprehensive Income (Loss) [Member]
Components of Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity Attributable to Parent, Beginning Balance	(56,830)	39,584	39,584	(651)
Amounts reclassified into earnings	(2,999)	(3,491)	4,815	14,936
Change in fair value	(2,425)	32,854	56,107	17,116
Foreign currency translation adjustment	1,682	34,429	(157,336)	8,183	50,653
Stockholders' Equity Attributable to Parent, Ending Balance	(60,572)	110,358	(56,830)	39,584	(651)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] | Interest Rate Swap [Member]
Components of Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity Attributable to Parent, Beginning Balance	23,378	(37,544)	(37,544)	(69,596)
Amounts reclassified into earnings	(2,999)	(3,491)	4,815	14,936
Change in fair value	(2,425)	32,854	56,107	17,116
Stockholders' Equity Attributable to Parent, Ending Balance	17,954	(1,199)	23,378	(37,544)	(69,596)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] | Foreign Currency Translation Adjustment [Member]
Components of Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity Attributable to Parent, Beginning Balance	(80,208)	77,128	77,128	68,945
Foreign currency translation adjustment	1,682	34,429	(157,336)	8,183
Stockholders' Equity Attributable to Parent, Ending Balance	$ (78,526)	$ 111,557	$ (80,208)	$ 77,128	$ 68,945

10-K Income Taxes - Narrative (

10-K Income Taxes - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended			36 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2022
Operating Loss Carryforwards [Line Items]
Statutory income tax rate	21%	21%	21%	21%
Inter-entity payments expense			$ 27,358
Deferred income tax expense			$ 4,148
Unrecognized tax benefits	$ 0			$ 0
Deferred tax liabilities, undistributed earnings	2,218,993			2,218,993
Deferred tax liability not recognized, undistributed earnings of foreign subsidiaries	366,457			366,457
Undistributed earnings	$ 3,393,993
Canada Revenue Agency [Member]
Operating Loss Carryforwards [Line Items]
Foreign Statutory income tax rate	27%
Operating loss carryforwards	$ 80,422			$ 80,422

Income Taxes - Income (Loss) Be

Income Taxes - Income (Loss) Before Provision (Benefit) for Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Taxes [Abstract]
U.S.			$ 734,126	$ 574,737	$ 22,349
Non-U.S.			314,837	196,005	231,565
Income before income tax provision	$ 252,225	$ 229,207	$ 1,048,963	$ 770,742	$ 253,914

Income Taxes - Provision Benefi

Income Taxes - Provision Benefit for Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Current:
U.S. Federal			$ 59,675	$ 71,180	$ 65,143
State			28,770	34,439	28,325
Non - U.S.			31,036	32,071	6,941
Current income tax expense (benefit), total			119,481	137,690	100,409
Deferred:
U.S. Federal			95,397	51,534	(36,659)
State			16,840	5,093	(8,762)
Non - U.S.			(18,756)	(42,064)	(5,066)
Deferred Income Tax Expense (Benefit), Total	$ 28,229	$ 38,378	93,481	14,563	(50,487)
Income Tax Expense (Benefit), Total	$ 54,389	$ 48,839	$ 212,962	$ 152,253	$ 49,922

Income Taxes - Differences betw

Income Taxes - Differences between Income Tax Provision in Statements of Net Income and Income Tax Provision Computed at Federal Statutory Rate (Details)	12 Months Ended			36 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2022
U.S. federal statutory rate	21%	21%	21%	21%
State taxes, net of federal benefit	4.20%	4.70%	4.50%
Deferred income tax liability adjustments		0.30%	1.60%
Effect of international operations	(4.00%)	(6.30%)	(7.00%)
Other	(0.90%)	0.10%	(0.40%)
Effective income tax rate, total	20.30%	19.80%	19.70%

Income Taxes - Significant Comp

Income Taxes - Significant Components of Deferred Income Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Deferred income tax assets:
Accrued expenses		$ 33,680	$ 31,840
Compensation		23,194	22,545
Contingent liabilities		19,966	21,268
Tax credits and loss carryforwards		33,019	24,415
Interest rate and fuel hedges			13,536
Finance costs		13,856	24,264
Gross deferred income tax assets		123,715	137,868
Less: Valuation allowance
Total deferred income tax assets		123,715	137,868
Deferred income tax liabilities:
Goodwill and other intangibles		(434,500)	(397,855)
Property and equipment		(579,615)	(484,519)
Landfill closure/post-closure		(22,745)	(18,597)
Prepaid expenses		(15,088)	(11,534)
Interest rate swaps		(8,429)	0
Investment in subsidiaries		(69,257)	(69,286)
Other		(7,823)	(6,998)
Total deferred income tax liabilities		(1,137,457)	(988,789)
Net deferred income tax liability	$ (1,041,152)	$ (1,013,742)	$ (850,921)

Segment Reporting - Narrative_2

Segment Reporting - Narrative (Details) - segment		3 Months Ended	12 Months Ended			36 Months Ended
	Apr. 01, 2023	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2022
Segment Reporting [Abstract]
Number of contracts or customers accounted for more than 10% of the Company's total revenues at the consolidated or reportable segment level		No single contract or customer accounted for more than 10% of the Company’s total revenues at the consolidated or reportable segment level during the periods presented.	No single contract or customer accounted for more than 10% of the Company’s total revenues at the consolidated or reportable segment level during the periods presented
Number of operating segments	6	6	6			6
Number of reportable segments		6	6	6	6	6

Segment Reporting - Summary o_2

Segment Reporting - Summary of Financial Information of Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Revenue	$ 1,900,503	$ 1,646,255	$ 7,211,859	$ 6,151,361	$ 5,445,990
Segment EBITDA	559,895	493,323	2,179,380	1,884,950	1,631,550
Depreciation and amortization			918,960	813,009	752,404
Capital expenditures			912,677	744,315	664,561
Total assets	17,227,094		17,134,603	14,699,924	13,992,364
Intercompany Revenue [Member]
Segment Reporting Information [Line Items]
Revenue	(272,370)	(223,261)	(998,069)	(878,654)	(814,397)
Reportable Segments [Member]
Segment Reporting Information [Line Items]
Revenue	2,172,873	1,869,516	8,209,928	7,030,015	6,260,387
Segment EBITDA	562,349	498,025	2,204,399	1,904,546	1,646,833
Eastern [Member]
Segment Reporting Information [Line Items]
Revenue	329,128	270,802	1,233,695	955,710	826,084
Segment EBITDA	73,275	65,287	281,522	245,091	196,068
Depreciation and amortization			190,480	156,499	143,744
Capital expenditures			138,028	90,212	111,912
Total assets			2,752,436	2,314,663	1,908,333
Eastern [Member] | Intercompany Revenue [Member]
Segment Reporting Information [Line Items]
Revenue	(59,669)	(45,165)	(211,498)	(155,836)	(142,927)
Eastern [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Revenue	388,797	315,967	1,445,193	1,111,546	969,011
Southern [Member]
Segment Reporting Information [Line Items]
Revenue	399,893	346,066	1,494,439	1,321,062	1,250,170
Segment EBITDA	121,914	101,124	466,519	369,221	343,181
Depreciation and amortization			175,614	173,235	173,885
Capital expenditures			151,093	139,258	125,972
Total assets			3,410,888	3,154,940	3,193,211
Southern [Member] | Intercompany Revenue [Member]
Segment Reporting Information [Line Items]
Revenue	(51,107)	(39,570)	(176,425)	(172,526)	(169,817)
Southern [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Revenue	451,000	385,636	1,670,864	1,493,588	1,419,987
Western [Member]
Segment Reporting Information [Line Items]
Revenue	395,839	333,659	1,428,031	1,228,626	1,102,752
Segment EBITDA	110,689	100,000	424,935	386,513	346,585
Depreciation and amortization			155,882	126,192	111,515
Capital expenditures			232,714	147,556	126,370
Total assets			3,239,679	2,168,804	1,770,403
Western [Member] | Intercompany Revenue [Member]
Segment Reporting Information [Line Items]
Revenue	(48,957)	(42,879)	(177,543)	(154,498)	(141,993)
Western [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Revenue	444,796	376,538	1,605,574	1,383,124	1,244,745
Central [Member]
Segment Reporting Information [Line Items]
Revenue	339,985	290,062	1,288,348	1,101,405	931,024
Segment EBITDA	115,756	96,951	446,315	379,644	332,321
Depreciation and amortization			156,895	138,683	117,499
Capital expenditures			181,065	149,360	109,013
Total assets			2,803,853	2,429,811	2,256,992
Central [Member] | Intercompany Revenue [Member]
Segment Reporting Information [Line Items]
Revenue	(43,540)	(32,936)	(159,355)	(142,261)	(127,885)
Central [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Revenue	383,525	322,998	1,447,703	1,243,666	1,058,909
Canada [Member]
Segment Reporting Information [Line Items]
Revenue	227,156	214,707	940,624	856,723	710,460
Segment EBITDA	82,984	84,844	349,403	339,859	256,119
Depreciation and amortization			118,388	111,458	103,334
Capital expenditures			70,051	68,183	109,886
Total assets			2,773,882	2,513,608	2,544,379
Canada [Member] | Intercompany Revenue [Member]
Segment Reporting Information [Line Items]
Revenue	(26,514)	(25,508)	(107,048)	(108,982)	(95,297)
Canada [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Revenue	253,670	240,215	1,047,672	965,705	805,757
Mid South [Member]
Segment Reporting Information [Line Items]
Revenue	208,502	190,959	826,722	687,835	625,500
Segment EBITDA	57,731	49,819	235,705	184,218	172,559
Depreciation and amortization			112,866	97,564	94,172
Capital expenditures			133,849	101,098	75,661
Total assets			1,727,323	1,690,234	1,428,929
Mid South [Member] | Intercompany Revenue [Member]
Segment Reporting Information [Line Items]
Revenue	(42,583)	(37,203)	(166,200)	(144,551)	(136,478)
Mid South [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Revenue	251,085	228,162	992,922	832,386	761,978
Corporate [Member]
Segment Reporting Information [Line Items]
Revenue	0	0	0	0	0
Segment EBITDA	(2,454)	(4,702)	(25,019)	(19,596)	(15,283)
Depreciation and amortization			8,835	9,378	8,255
Capital expenditures			5,877	48,648	5,747
Total assets			426,542	427,864	890,117
Corporate [Member] | Intercompany Revenue [Member]
Segment Reporting Information [Line Items]
Revenue	0	0	0	0	0
Corporate [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Revenue	$ 0	$ 0	$ 0	$ 0	$ 0

Segment Reporting - Changes i_2

Segment Reporting - Changes in Goodwill by Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021
Goodwill [Line Items]
Goodwill, Beginning Balance	$ 6,902,297	$ 6,187,643	$ 6,187,643	$ 5,726,650
Goodwill transferred				0
Goodwill acquired	37,789	212,044	824,591	454,597
Goodwill acquisition adjustments	(936)	2,557		(2)
Goodwill divested				(324)
Impact of changes in foreign currency	1,417	25,519	(109,937)	6,722
Goodwill, Ending Balance	6,940,567	6,427,763	6,902,297	6,187,643
Eastern [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	1,189,111	992,578	992,578	1,374,577
Goodwill transferred				(557,353)
Goodwill acquired	3,440	85,866	196,533	175,354
Goodwill acquisition adjustments	0	0		0
Goodwill divested				0
Impact of changes in foreign currency	0	0	0	0
Goodwill, Ending Balance	1,192,551	1,078,444	1,189,111	992,578
Southern [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	1,547,894	1,457,437	1,457,437	1,532,215
Goodwill transferred				(77,430)
Goodwill acquired	0	0	90,457	2,976
Goodwill acquisition adjustments	(647)	0		0
Goodwill divested				(324)
Impact of changes in foreign currency	0	0	0	0
Goodwill, Ending Balance	1,547,247	1,457,437	1,547,894	1,457,437
Western [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	732,335	503,223	503,223	442,862
Goodwill transferred				(36,486)
Goodwill acquired	30,703	0	229,112	96,847
Goodwill acquisition adjustments	0	2,652		0
Goodwill divested				0
Impact of changes in foreign currency	0	0	0	0
Goodwill, Ending Balance	763,038	505,875	732,335	503,223
Central [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	1,003,470	931,269	931,269	824,204
Goodwill transferred				39,037
Goodwill acquired	397	2,794	72,201	68,028
Goodwill acquisition adjustments	0	0		0
Goodwill divested				0
Impact of changes in foreign currency	0	0	0	0
Goodwill, Ending Balance	1,003,867	934,063	1,003,470	931,269
Canada [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	1,684,670	1,559,512	1,559,512	1,552,792
Goodwill transferred				0
Goodwill acquired	0	123,384	235,095	0
Goodwill acquisition adjustments	(289)	0		(2)
Goodwill divested				0
Impact of changes in foreign currency	1,417	25,519	(109,937)	6,722
Goodwill, Ending Balance	1,685,798	1,708,415	1,684,670	1,559,512
Mid South [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	744,817	743,624	743,624	0
Goodwill transferred				632,232
Goodwill acquired	3,249	0	1,193	111,392
Goodwill acquisition adjustments	0	(95)		0
Goodwill divested				0
Impact of changes in foreign currency	0	0	0	0
Goodwill, Ending Balance	$ 748,066	$ 743,529	$ 744,817	$ 743,624

Segment Reporting - Property _2

Segment Reporting - Property and Equipment in US and Canada (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Property and equipment	$ 6,956,620	$ 6,950,915	$ 5,721,949
UNITED STATES
Segment Reporting Information [Line Items]
Property and equipment		6,201,011	5,075,184
CANADA
Segment Reporting Information [Line Items]
Property and equipment		$ 749,904	$ 646,765

Segment Reporting - Reconcili_2

Segment Reporting - Reconciliation of Segment EBITDA to Income Before Income Tax Provision (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment EBITDA	$ 559,895	$ 493,323	$ 2,179,380	$ 1,884,950	$ 1,631,550
Depreciation	(204,059)	(179,950)	(763,285)	(673,730)	(621,102)
Amortization of intangibles	(39,282)	(37,635)	(155,675)	(139,279)	(131,302)
Impairments and other operating items	(1,865)	(1,878)	(18,230)	(32,316)	(466,718)
Interest expense	(68,353)	(41,324)	(202,331)	(162,796)	(162,375)
Interest income	2,715	137	5,950	2,916	5,253
Other income (expense), net	3,174	(3,466)	3,154	6,285	(1,392)
Loss on early extinguishment of debt			0	(115,288)	0
Income before income tax provision	252,225	229,207	1,048,963	770,742	253,914
Reportable Segments [Member]
Segment EBITDA	562,349	498,025	2,204,399	1,904,546	1,646,833
Eastern [Member]
Segment EBITDA	73,275	65,287	281,522	245,091	196,068
Southern [Member]
Segment EBITDA	121,914	101,124	466,519	369,221	343,181
Western [Member]
Segment EBITDA	110,689	100,000	424,935	386,513	346,585
Central [Member]
Segment EBITDA	115,756	96,951	446,315	379,644	332,321
Canada [Member]
Segment EBITDA	82,984	84,844	349,403	339,859	256,119
Mid South [Member]
Segment EBITDA	57,731	49,819	235,705	184,218	172,559
Corporate [Member]
Segment EBITDA	$ (2,454)	$ (4,702)	$ (25,019)	$ (19,596)	$ (15,283)

Net Income Per Share Informat_6

Net Income Per Share Information - Basic and Diluted Net Income Per Common Share (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Numerator:
Net income attributable to Waste Connections for basic and diluted earnings per share	$ 197,813	$ 180,324	$ 835,662	$ 618,047	$ 204,677
Denominator:
Basic shares outstanding	257,372,942	258,946,933	257,383,578	261,166,723	263,189,699
Dilutive effect of equity-based awards	616,029	614,050	655,223	561,747	497,840
Diluted shares outstanding	257,988,971	259,560,983	258,038,801	261,728,470	263,687,539

Employee Benefit Plans - Narrat

Employee Benefit Plans - Narrative (Details) $ in Thousands	5 Months Ended	12 Months Ended			24 Months Ended
	May 31, 2020	Dec. 31, 2022 USD ($) agreement	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2022 USD ($)
Employee Benefit Plan [Line Items]
Percentage of every dollar of a participating employee's pre-tax contributions as matching contribution to 401(k) Plan		100%
Number of multiemployer pension plans | agreement		17
Deferred Compensation Plan [Member]
Employee Benefit Plan [Line Items]
Percentage of every dollar of a participating employee's pre-tax contributions as matching contribution to 401(k) Plan	100%				100%
Percentage of employee's eligible compensation that represents the maximum amount of employer matching contribution to plan	5%				5%
Percentage of salary that may voluntarily be elected to be deferred		80%
Percentage of bonuses, commissions and restricted share unit grants that may voluntarily be elected to be deferred		100%
Total liability for deferred compensation		$ 40,407	$ 50,738		$ 40,407
Voluntary Savings And Investment Plan
Employee Benefit Plan [Line Items]
Total employer expenses, including employer matching contributions		$ 37,165	$ 31,834	$ 16,350
Maximum [Member]
Employee Benefit Plan [Line Items]
Percentage of employee's eligible compensation that represents the maximum amount of employer matching contribution to plan		5%
Maximum [Member] | Retirement Savings Plan [Member]
Employee Benefit Plan [Line Items]
Contribution to a deferred profit sharing plan		5%

Employee Benefit Plans - Plan C

Employee Benefit Plans - Plan Contributions (Details) - USD ($) $ in Thousands			9 Months Ended	12 Months Ended
	Jan. 01, 2021	Apr. 30, 2020	Dec. 31, 2022	Dec. 31, 2022	Sep. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Multiemployer Plans [Line Items]
Company contributions				$ 17,156			$ 15,251	$ 14,592
Local 731 I b Of T Pension Fund [Member]
Multiemployer Plans [Line Items]
Registration number				36-6513567 - 001
Pension Protection Act zone status					Green
FIP/RP status				NA
Company contributions				$ 4,484			$ 4,504	4,628
Collective-bargaining agreement, expiration date				Sep. 30, 2023
Western Conference of Teamsters Pension Trust [Member]
Multiemployer Plans [Line Items]
Registration number				91-6145047 - 001
Pension Protection Act zone status				Green			Green
FIP/RP status				NA
Company contributions				$ 5,803			$ 4,963	4,841
Western Conference of Teamsters Pension Trust [Member] | Minimum [Member]
Multiemployer Plans [Line Items]
Collective-bargaining agreement, expiration date				Apr. 30, 2023
Western Conference of Teamsters Pension Trust [Member] | Maximum [Member]
Multiemployer Plans [Line Items]
Collective-bargaining agreement, expiration date				Jun. 30, 2027
International Union of Operating Engineers Pension Trust [Member]
Multiemployer Plans [Line Items]
Registration number				85512-1
Pension Protection Act zone status		Green
FIP/RP status				NA
Company contributions				$ 281			295	279
Collective-bargaining agreement, expiration date				Mar. 31, 2024
Multi-Sector Pension Plan [Member]
Multiemployer Plans [Line Items]
Registration number				1085653
Pension Protection Act zone status	Red
FIP/RP status				NA
Company contributions				$ 249			265	196
Collective-bargaining agreement, expiration date				Dec. 31, 2023
Midwest Operating Engineers Pension Plan [Member]
Multiemployer Plans [Line Items]
Registration number				36-6140097 - 001
Pension Protection Act zone status			Green			Green
FIP/RP status				NA
Company contributions				$ 542			$ 424	316
Collective-bargaining agreement, expiration date				Oct. 31, 2025
Locals 302 & 612 of the IOUE - Employers Construction Industry Retirement Plan [Member]
Multiemployer Plans [Line Items]
Registration number				91-6028571 - 001
Pension Protection Act zone status				Green			Green
FIP/RP status				NA
Company contributions				$ 338			$ 313	298
Collective-bargaining agreement, expiration date				Nov. 16, 2022
Suburban Teamsters of Northern Illinois Pension Fund [Member]
Multiemployer Plans [Line Items]
Registration number				36-6155778 - 001
Pension Protection Act zone status				Green			Green
FIP/RP status				NA
Company contributions				$ 2,516			$ 2,300	2,080
Collective-bargaining agreement, expiration date				Feb. 29, 2024
Teamster Local 301 Pension Fund [Member]
Multiemployer Plans [Line Items]
Registration number				36-6492992 - 001
Pension Protection Act zone status				Green			Green
FIP/RP status				NA
Company contributions				$ 1,310			$ 841	673
Collective-bargaining agreement, expiration date				Sep. 30, 2023
Automobile Mechanics' Local No. 701 Union and Industry Pension Fund [Member]
Multiemployer Plans [Line Items]
Registration number				36-6042061 - 001
Pension Protection Act zone status				Green			Green
FIP/RP status				NA
Company contributions				$ 470			$ 439	457
Collective-bargaining agreement, expiration date				Dec. 31, 2022
IAM National Pension Fund [Member]
Multiemployer Plans [Line Items]
Registration number				51-6031295 - 002
Pension Protection Act zone status				Red			Red
FIP/RP status				Implemented
Company contributions				$ 342			$ 299	310
Collective-bargaining agreement, expiration date				Dec. 31, 2022
Local 813 Pension Trust Fund [Member]
Multiemployer Plans [Line Items]
Registration number				13-1975659 - 001
Pension Protection Act zone status				Red			Red
FIP/RP status				Implemented
Company contributions				$ 429			$ 258	183
Collective-bargaining agreement, expiration date				Nov. 30, 2027
Recycling and General Industrial Union Local 108 Pension Fund [Member]
Multiemployer Plans [Line Items]
Registration number				13-6366378 - 001
Pension Protection Act zone status				Green			Green
FIP/RP status				NA
Company contributions				$ 230			$ 217	269
Collective-bargaining agreement, expiration date				Feb. 28, 2027
Nurses and Local 813 IBT Retirement Plan [Member]
Multiemployer Plans [Line Items]
Registration number				13-3628926 - 001
Pension Protection Act zone status				Green			Green
FIP/RP status				NA
Company contributions				$ 97			$ 58	52
Collective-bargaining agreement, expiration date				Nov. 30, 2027
Other Multiemployer Plans [Member]
Multiemployer Plans [Line Items]
Company contributions				$ 65			$ 75	$ 10

Subsequent Events (Details)_2

Subsequent Events (Details) - $ / shares			3 Months Ended	5 Months Ended
	Apr. 26, 2023	Feb. 15, 2023	Mar. 31, 2023	Dec. 31, 2022
Subsequent Event [Line Items]
Dividends, date of record	May 10, 2023	Mar. 01, 2023
Dividends, date to be paid	May 24, 2023	Mar. 15, 2023
Dividends per share amount	$ 0.255	$ 0.255
Dividends, declared date	Apr. 26, 2023	Feb. 15, 2023
Share repurchase plan expiration date			Aug. 09, 2023	Aug. 09, 2023