Iron Mountain (IRM) 10-Q 3 Nov 22 2022 Q3 Quarterly report Financial data

Cover Page

Cover Page - shares	9 Months Ended
	Sep. 30, 2022	Oct. 28, 2022
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2022
Document Transition Report	false
Entity File Number	1-13045
Entity Registrant Name	IRON MOUNTAIN INC
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	23-2588479
Entity Address, Address Line One	One Federal Street
Entity Address, City or Town	Boston
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	02110
City Area Code	617
Local Phone Number	535-4766
Title of 12(b) Security	Common Stock, $.01 par value
Trading Symbol	IRM
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Emerging Growth Company	false
Small Business Entity	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		290,714,037
Entity Central Index Key	0001020569
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q3
Amendment Flag	false

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Current Assets:
Cash and cash equivalents	$ 155,223	$ 255,828
Accounts receivable (less allowances of $52,695 and $62,009 as of September 30, 2022 and December 31, 2021, respectively)	1,133,596	961,419
Prepaid expenses and other	268,030	224,020
Total Current Assets	1,556,849	1,441,267
Property, Plant and Equipment:
Property, plant and equipment	8,794,078	8,647,303
Less—Accumulated depreciation	(4,063,636)	(3,979,159)
Property, Plant and Equipment, Net	4,730,442	4,668,144
Other Assets, Net:
Goodwill	4,831,306	4,463,531
Customer and supplier relationships and other intangible assets	1,444,924	1,181,043
Operating lease right-of-use assets	2,556,253	2,314,422
Other	574,942	381,624
Total Other Assets, Net	9,407,425	8,340,620
Total Assets	15,694,716	14,450,031
Current Liabilities:
Current portion of long-term debt	81,275	309,428
Accounts payable	432,384	369,145
Accrued expenses and other current liabilities (includes current portion of operating lease liabilities)	929,566	1,032,537
Deferred revenue	282,687	307,470
Total Current Liabilities	1,725,912	2,018,580
Long-term Debt, net of current portion	10,228,846	8,962,513
Long-term Operating Lease Liabilities, net of current portion	2,405,751	2,171,472
Other Long-term Liabilities	398,830	144,053
Deferred Income Taxes	307,717	223,934
Commitments and Contingencies
Redeemable Noncontrolling Interests	93,821	72,411
Equity:
Preferred stock (par value $0.01; authorized 10,000,000 shares; none issued and outstanding)	0	0
Common stock (par value $0.01; authorized 400,000,000 shares; issued and outstanding 290,687,942 and 289,757,061 shares as of September 30, 2022 and December 31, 2021, respectively)	2,907	2,898
Additional paid-in capital	4,445,988	4,412,553
(Distributions in excess of earnings) Earnings in excess of distributions	(3,330,213)	(3,221,152)
Accumulated other comprehensive items, net	(589,481)	(338,347)
Total Iron Mountain Incorporated Stockholders' Equity	529,201	855,952
Noncontrolling Interests	4,638	1,116
Total Equity	533,839	857,068
Total Liabilities and Equity	$ 15,694,716	$ 14,450,031

CONDENSED CONSOLIDATED BALANC_2

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 52,695	$ 62,009
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, authorized shares (in shares)	10,000,000	10,000,000
Preferred stock, issued shares (in shares)	0	0
Preferred stock, outstanding shares (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized shares (in shares)	400,000,000	400,000,000
Common stock, issued shares (in shares)	290,687,942	289,757,061
Common stock, outstanding shares (in shares)	290,687,942	289,757,061

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenues:
Storage rental	$ 760,370	$ 718,614	$ 2,264,566	$ 2,144,942
Service	526,575	411,534	1,559,959	1,187,002
Total Revenues	1,286,945	1,130,148	3,824,525	3,331,944
Operating Expenses:
Cost of sales (excluding depreciation and amortization)	546,041	481,663	1,649,139	1,408,151
Selling, general and administrative	285,299	241,596	861,416	760,098
Depreciation and amortization	175,077	174,818	536,946	507,145
Acquisition and Integration Costs	5,554	1,138	38,093	3,415
Restructuring charges	3,382	50,432	3,382	129,686
(Gain) Loss on disposal/write-down of property, plant and equipment, net	(14,170)	(935)	(66,124)	(134,321)
Total Operating Expenses	1,001,183	948,712	3,022,852	2,674,174
Operating Income (Loss)	285,762	181,436	801,673	657,770
Interest Expense, Net (includes Interest Income)	121,767	103,809	351,266	313,451
Other (Income) Expense, Net	(52,870)	(18,501)	(38,186)	(200,018)
Net Income (Loss) Before Provision (Benefit) for Income Taxes	216,865	96,128	488,593	544,337
Provision (Benefit) for Income Taxes	23,934	28,017	52,097	153,073
Net Income (Loss)	192,931	68,111	436,496	391,264
Less: Net Income (Loss) Attributable to Noncontrolling Interests	767	428	1,952	2,693
Net Income (Loss) Attributable to Iron Mountain Incorporated	$ 192,164	$ 67,683	$ 434,544	$ 388,571
Net Income (Loss) Per Share Attributable to Iron Mountain Incorporated:
Basic (in dollars per share)	$ 0.66	$ 0.23	$ 1.49	$ 1.34
Diluted (in dollars per share)	$ 0.66	$ 0.23	$ 1.49	$ 1.34
Weighted average common shares outstanding-basic (in shares)	290,937,000	289,762,000	290,673,000	289,255,000
Weighted average common shares outstanding-diluted (in shares)	292,551,871	291,482,255	292,294,236	290,696,596

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Statement [Abstract]
Interest income	$ 2,176	$ 2,160	$ 5,995	$ 5,858

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ 192,931	$ 68,111	$ 436,496	$ 391,264
Other Comprehensive (Loss) Income:
Foreign Currency Translation Adjustment	(175,098)	(91,263)	(335,431)	(115,075)
Change in Fair Value of Derivative Instruments	32,233	14,665	83,210	35,505
Total Other Comprehensive (Loss) Income:	(142,865)	(76,598)	(252,221)	(79,570)
Comprehensive Income (Loss)	50,066	(8,487)	184,275	311,694
Comprehensive Income (Loss) Attributable to Noncontrolling Interests	408	(370)	865	1,683
Comprehensive Income (Loss) Attributable to Iron Mountain Incorporated	$ 49,658	$ (8,117)	$ 183,410	$ 310,011

CONDENSED CONSOLIDATED STATEM_4

CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Total	COMMON STOCK	ADDITIONAL PAID-IN CAPITAL	(DISTRIBUTIONS IN EXCESS OF EARNINGS) EARNINGS IN EXCESS OF DISTRIBUTIONS	ACCUMULATED OTHER COMPREHENSIVE ITEMS, NET	NONCONTROLLING INTERESTS	REDEEMABLE NONCONTROLLING INTERESTS
Beginning of Period at Dec. 31, 2020	$ 1,136,729	$ 2,883	$ 4,340,078	$ (2,950,339)	$ (255,893)	$ 0
Balance (in shares) at Dec. 31, 2020		288,273,049
Increase (Decrease) in Stockholders' Equity
Issuance and net settlement of shares under employee stock purchase plan and option plans and stock-based compensation	66,507	$ 12	66,495
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation (in shares)		1,273,097
Changes in equity related to noncontrolling interests	680		680				$ (512)
Parent cash dividends declared	(540,045)			(540,045)
Foreign currency translation adjustment	(114,112)				(114,065)	(47)
Change in fair value of derivative instruments	35,505				35,505
Net income (loss)	388,571			388,571
Purchase of noncontrolling interests	1,311					1,311
End of period at Sep. 30, 2021	975,146	$ 2,895	4,407,253	(3,101,813)	(334,453)	1,264
Balance (in shares) at Sep. 30, 2021		289,546,146
Beginning of redeemable noncontrolling interest at Dec. 31, 2020							59,805
Increase (Decrease) in Temporary Equity [Roll Forward]
Changes in equity related to noncontrolling interests	680		680				(512)
Foreign currency translation adjustment							(963)
Net income (loss)							2,693
Noncontrolling interests equity contributions							2,200
Noncontrolling interests dividends							(1,882)
Purchase of noncontrolling interests							2,567
Redemption of noncontrolling interests							(2,518)
Ending of redeemable noncontrolling interest at Sep. 30, 2021							61,390
Beginning of Period at Jun. 30, 2021	1,147,742	$ 2,895	4,392,396	(2,988,896)	(258,653)	0
Balance (in shares) at Jun. 30, 2021		289,458,768
Increase (Decrease) in Stockholders' Equity
Issuance and net settlement of shares under employee stock purchase plan and option plans and stock-based compensation	14,857	$ 0	14,857
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation (in shares)		87,378
Changes in equity related to noncontrolling interests							168
Parent cash dividends declared	(180,600)			(180,600)
Foreign currency translation adjustment	(90,512)				(90,465)	(47)
Change in fair value of derivative instruments	14,665				14,665
Net income (loss)	67,683			67,683
Purchase of noncontrolling interests	1,311					1,311
End of period at Sep. 30, 2021	975,146	$ 2,895	4,407,253	(3,101,813)	(334,453)	1,264
Balance (in shares) at Sep. 30, 2021		289,546,146
Beginning of redeemable noncontrolling interest at Jun. 30, 2021							64,660
Increase (Decrease) in Temporary Equity [Roll Forward]
Changes in equity related to noncontrolling interests							168
Foreign currency translation adjustment							(751)
Net income (loss)							428
Noncontrolling interests dividends							(597)
Redemption of noncontrolling interests							(2,518)
Ending of redeemable noncontrolling interest at Sep. 30, 2021							61,390
Beginning of Period at Dec. 31, 2021	$ 857,068	$ 2,898	4,412,553	(3,221,152)	(338,347)	1,116
Balance (in shares) at Dec. 31, 2021	289,757,061	289,757,061
Increase (Decrease) in Stockholders' Equity
Issuance and net settlement of shares under employee stock purchase plan and option plans and stock-based compensation	$ 36,939	$ 9	36,930
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation (in shares)		930,881
Changes in equity related to noncontrolling interests	2,626		(1,009)			3,635	1,009
Parent cash dividends declared	(543,605)			(543,605)
Foreign currency translation adjustment	(334,825)				(334,344)	(481)	(606)
Change in fair value of derivative instruments	83,210				83,210
Net income (loss)	434,912			434,544		368
Noncontrolling interests equity contributions and related costs	(2,486)		(2,486)
End of period at Sep. 30, 2022	$ 533,839	$ 2,907	4,445,988	(3,330,213)	(589,481)	4,638
Balance (in shares) at Sep. 30, 2022	290,687,942	290,687,942
Beginning of redeemable noncontrolling interest at Dec. 31, 2021	$ 72,411						72,411
Increase (Decrease) in Temporary Equity [Roll Forward]
Changes in equity related to noncontrolling interests	2,626		(1,009)			3,635	1,009
Net income (loss)							1,584
Noncontrolling interests equity contributions							21,547
Noncontrolling interests dividends							(2,124)
Ending of redeemable noncontrolling interest at Sep. 30, 2022	93,821						93,821
Beginning of Period at Jun. 30, 2022	651,775	$ 2,907	4,432,009	(3,340,992)	(446,975)	4,826
Balance (in shares) at Jun. 30, 2022		290,679,958
Increase (Decrease) in Stockholders' Equity
Issuance and net settlement of shares under employee stock purchase plan and option plans and stock-based compensation	13,979		13,979
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation (in shares)		7,984
Parent cash dividends declared	(181,385)			(181,385)
Foreign currency translation adjustment	(175,061)				(174,739)	(322)	(37)
Change in fair value of derivative instruments	32,233				32,233
Net income (loss)	192,298			192,164		134
End of period at Sep. 30, 2022	$ 533,839	$ 2,907	$ 4,445,988	$ (3,330,213)	$ (589,481)	$ 4,638
Balance (in shares) at Sep. 30, 2022	290,687,942	290,687,942
Beginning of redeemable noncontrolling interest at Jun. 30, 2022							93,957
Increase (Decrease) in Temporary Equity [Roll Forward]
Net income (loss)							633
Noncontrolling interests dividends							(732)
Ending of redeemable noncontrolling interest at Sep. 30, 2022	$ 93,821						$ 93,821

CONDENSED CONSOLIDATED STATEM_5

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Cash Flows from Operating Activities:
Net income (loss)	$ 436,496	$ 391,264
Adjustments to reconcile net income (loss) to cash flows from operating activities:
Depreciation	350,626	347,269
Amortization (includes amortization of deferred financing costs and discounts of $13,536 and $12,470 for the nine months ended September 30, 2022 and 2021, respectively)	199,856	172,346
Revenue reduction associated with amortization of customer inducements and above- and below-market leases	5,532	6,578
Stock-based compensation expense	45,923	46,852
(Benefit) provision for deferred income taxes	(22,991)	36,333
Loss on early extinguishment of debt	671	0
Gain on IPM divestment	0	(180,569)
(Gain) loss on disposal/write-down of property, plant and equipment, net	(66,124)	(134,321)
Loss associated with OSG deconsolidation	105,825	0
Gain associated with Clutter Transaction	(35,821)	0
Foreign currency transactions and other, net	(101,329)	(13,239)
(Increase) decrease in assets	(219,173)	(112,753)
(Decrease) increase in liabilities	(139,136)	(96,423)
Cash Flows from Operating Activities	560,355	463,337
Cash Flows from Investing Activities:
Capital expenditures	(596,801)	(418,976)
Cash paid for acquisitions, net of cash acquired	(724,213)	(203,752)
Acquisition of customer relationships	(1,901)	(4,800)
Customer inducements	(4,288)	(5,148)
Contract fulfillment costs	(49,874)	(43,699)
Investments in joint ventures and other investments	(46,100)	(72,153)
Net proceeds from IPM Divestment	0	213,878
Proceeds from sales of property and equipment and other, net	119,417	214,865
Cash Flows from Investing Activities	(1,303,760)	(319,785)
Cash Flows from Financing Activities:
Repayment of revolving credit facility, term loan facilities and other debt	(8,038,964)	(2,622,555)
Proceeds from revolving credit facility, term loan facilities and other debt	9,240,478	3,037,476
Debt financing and equity contribution from noncontrolling interests	21,547	0
Debt repayment and equity distribution to noncontrolling interests	(2,124)	(1,882)
Repurchase of noncontrolling interest	0	(75,000)
Parent cash dividends	(544,069)	(538,902)
Net (payments) proceeds associated with employee stock-based awards	(8,984)	19,655
Other, net	(9,437)	3,621
Cash Flows from Financing Activities	658,447	(177,587)
Effect of Exchange Rates on Cash and Cash Equivalents	(15,647)	(9,589)
(Decrease) increase in Cash and Cash Equivalents	(100,605)	(43,624)
Cash and Cash Equivalents, Beginning of Period	255,828	205,063
Cash and Cash Equivalents, End of Period	155,223	161,439
Supplemental Information:
Cash Paid for Interest	410,851	395,355
Cash Paid for Income Taxes, Net	77,765	96,174
Non-Cash Investing and Financing Activities:
Financing Leases	18,774	40,590
Accrued Capital Expenditures	137,802	60,418
Deferred Purchase Obligation, Purchase Price Holdbacks and Other	279,734	0
Dividends Payable	$ 190,095	$ 189,010

CONDENSED CONSOLIDATED STATEM_6

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Statement of Cash Flows [Abstract]
Deferred financing costs and discount included in amortization	$ 13,536	$ 12,470

General

General	9 Months Ended
	Sep. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
General	GENERAL The unaudited condensed consolidated financial statements of Iron Mountain Incorporated, a Delaware corporation ("IMI"), and its subsidiaries ("we" or "us"), have been prepared pursuant to the rules and regulations of the United States Securities and Exchange Commission (the "SEC"). Certain information and footnote disclosures normally included in the annual financial statements prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") have been omitted pursuant to those rules and regulations, but we believe that the disclosures included herein are adequate to make the information presented not misleading. The interim condensed consolidated financial statements are presented herein and, in the opinion of management, reflect all adjustments of a normal recurring nature necessary for a fair presentation. Interim results are not necessarily indicative of results for a full year. The Condensed Consolidated Financial Statements and Notes thereto, which are included herein, should be read in conjunction with the Consolidated Financial Statements and Notes thereto for the year ended December 31, 2021 included in Exhibit 99.1 of our Current Report on Form 8-K filed with the SEC on August 4, 2022 (our "Current Report").

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2022
Accounting Policies [Abstract]
Summary Of Significant Accounting Policies	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIESA. CASH AND CASH EQUIVALENTSCash and cash equivalents include cash on hand and cash invested in highly liquid short-term securities, which have remaining maturities at the date of purchase of less than 90 days. Cash and cash equivalents are carried at cost, which approximates fair value B. ACCOUNTS RECEIVABLE We maintain an allowance for doubtful accounts and a credit memo reserve for estimated losses resulting from the potential inability of our customers to make required payments and potential disputes regarding billing and service issues. The rollforward of the allowance for doubtful accounts and credit memo reserves for the nine months ended September 30, 2022 is as follows: Balance as of December 31, 2021 $ 62,009 Credit memos charged to revenue 41,722 Allowance for bad debts charged to expense 10,691 Deductions and other (1) (61,727) Balance as of September 30, 2022 $ 52,695 (1) Primarily consists of the issuance of credit memos, the write-off of accounts receivable, allowances associated with businesses acquired and the impact associated with currency translation adjustments. C. INVENTORY Inventories are stated at the lower of cost or net realizable value, based on a first-in, first-out methodology. Our inventory primarily consists of information technology-related assets including memory, central processing units, hard drives, adaptors and networking. All of our inventory is considered finished goods. Inventory is included as a component of Prepaid expenses and other in our Condensed Consolidated Balance Sheets. At September 30, 2022, we have inventory of approximately $14,565, net of related reserves for obsolete, excess and slow-moving inventory, related to our asset lifecycle management ("ALM") business. We had no inventory as of December 31, 2021. D. LEASES We lease facilities for certain warehouses, data centers and office space. We also have land leases, including those on which certain facilities are located. Operating and financing lease right-of-use assets and lease liabilities as of September 30, 2022 and December 31, 2021 are as follows: DESCRIPTION SEPTEMBER 30, 2022 DECEMBER 31, 2021 Assets: Operating lease right-of-use assets $ 2,556,253 $ 2,314,422 Financing lease right-of-use assets, net of accumulated depreciation (1) 250,627 298,049 Liabilities: Current Operating lease liabilities $ 270,311 $ 259,597 Financing lease liabilities (1) 34,622 41,168 Long-term Operating lease liabilities $ 2,405,751 $ 2,171,472 Financing lease liabilities (1) 276,627 315,561 (1) Financing lease right-of-use assets, current financing lease liabilities and long-term financing lease liabilities are included within Property, Plant and Equipment, Net, Current portion of long-term debt and Long-term Debt, net of current portion, respectively, within our Condensed Consolidated Balance Sheets. The components of the lease expense for the three and nine months ended September 30, 2022 and 2021 are as follows: THREE MONTHS ENDED SEPTEMBER 30, NINE MONTHS ENDED SEPTEMBER 30, DESCRIPTION 2022 2021 2022 2021 Operating lease cost (1) $ 145,293 $ 140,551 $ 428,686 $ 408,312 Financing lease cost: Depreciation of financing lease right-of-use assets $ 10,186 $ 14,006 $ 32,218 $ 39,062 Interest expense for financing lease liabilities 4,126 5,055 13,163 14,940 (1) Operating lease cost, the majority of which is included in Cost of sales, includes variable lease costs of $30,730 and $89,647 for the three and nine months ended September 30, 2022, respectively, and $28,835 and $86,422 for the three and nine months ended September 30, 2021, respectively. Other information: Supplemental cash flow information relating to our leases for the nine months ended September 30, 2022 and 2021 is as follows: NINE MONTHS ENDED SEPTEMBER 30, CASH PAID FOR AMOUNTS INCLUDED IN MEASUREMENT OF LEASE LIABILITIES: 2022 2021 Operating cash flows used in operating leases $ 302,442 $ 291,535 Operating cash flows used in financing leases (interest) 13,163 14,940 Financing cash flows used in financing leases 29,254 35,360 NON-CASH ITEMS: Operating lease modifications and reassessments $ 145,133 $ 103,158 New operating leases (including acquisitions and sale-leaseback transactions) 485,673 240,822 E. GOODWILL Our reporting units as of December 31, 2021 are described in detail in Note 2.k. to Notes to Consolidated Financial Statements included in our Current Report. The goodwill associated with acquisitions completed during the first nine months of 2022 (as described in Note 3) has been incorporated into our current reporting units. The changes in the carrying value of goodwill attributable to each reportable segment for the nine months ended September 30, 2022 are as follows: GLOBAL RIM BUSINESS GLOBAL DATA CENTER BUSINESS CORPORATE AND OTHER BUSINESS TOTAL CONSOLIDATED Goodwill balance, net of accumulated amortization as of December 31, 2021 (1) $ 3,972,852 $ 426,074 $ 64,605 $ 4,463,531 Tax deductible goodwill acquired during the year — — 762 762 Non-tax deductible goodwill acquired during the period 696 — 585,444 586,140 Fair value and other adjustments (2) (12,101) — 384 (11,717) Currency effects (186,056) (18,287) (3,067) (207,410) Goodwill balance, net of accumulated amortization as of September 30, 2022 $ 3,775,391 $ 407,787 $ 648,128 $ 4,831,306 Accumulated goodwill impairment balance as of September 30, 2022 $ 132,409 $ — $ 26,011 $ 158,420 (1) The balances as of December 31, 2021 have been recast to reflect the segment changes described in our Current Report. (2) This amount primarily represents an adjustment to goodwill as a result of the deconsolidation of certain businesses, as described in Note 2.l. F. FAIR VALUE MEASUREMENTS The assets and liabilities carried at fair value measured on a recurring basis as of September 30, 2022 and December 31, 2021 are as follows: FAIR VALUE MEASUREMENTS AT SEPTEMBER 30, 2022 USING DESCRIPTION TOTAL CARRYING QUOTED PRICES IN SIGNIFICANT OTHER SIGNIFICANT Money Market Funds $ 18,861 $ — $ 18,861 $ — Time Deposits 1,123 — 1,123 — Trading Securities 9,085 9,049 36 — Derivative Assets 85,887 — 85,887 — Deferred Purchase Obligation (as defined in Note 3) 275,100 — — 275,100 FAIR VALUE MEASUREMENTS AT DECEMBER 31, 2021 USING DESCRIPTION TOTAL CARRYING QUOTED PRICES IN SIGNIFICANT OTHER SIGNIFICANT Money Market Funds $ 101,022 $ — $ 101,022 $ — Time Deposits 2,238 — 2,238 — Trading Securities 11,147 11,062 85 — Derivative Assets 11,021 — 11,021 — Derivative Liabilities 8,344 — 8,344 — There were no material items that are measured at fair value on a non-recurring basis at September 30, 2022 and December 31, 2021, other than (i) those disclosed in Note 2.o. to Notes to Consolidated Financial Statements included in our Current Report, (ii) assets acquired and liabilities assumed through our acquisitions that occurred during the nine months ended September 30, 2022, (iii) our initial investment in the Clutter JV and our additional investment in the Web Werks JV (each as defined in Note 4), and (iv) the fair value of our retained investment of our deconsolidated businesses (as described in Note 2.l.), all of which are based on Level 3 inputs. The fair value of the Deferred Purchase Obligation associated with the ITRenew Transaction (as defined in Note 3) was determined utilizing a Monte-Carlo model and takes into account our forecasted projections as it relates to the underlying performance of the business. There has been no material change in the fair value of the Deferred Purchase Obligation since our initial analysis. G. ACCUMULATED OTHER COMPREHENSIVE ITEMS, NET The changes in Accumulated other comprehensive items, net for the three and nine months ended September 30, 2022 and 2021 are as follows: THREE MONTHS ENDED SEPTEMBER 30, 2022 THREE MONTHS ENDED SEPTEMBER 30, 2021 FOREIGN CHANGE IN FAIR VALUE OF TOTAL FOREIGN CHANGE IN FAIR VALUE OF TOTAL Beginning of Period $ (500,629) $ 53,654 $ (446,975) $ (229,790) $ (28,863) $ (258,653) Other comprehensive (loss) income: Foreign currency translation and other adjustments (174,739) — (174,739) (90,465) — (90,465) Change in fair value of derivative instruments — 32,233 32,233 — 14,665 14,665 Total other comprehensive (loss) income (174,739) 32,233 (142,506) (90,465) 14,665 (75,800) End of Period $ (675,368) $ 85,887 $ (589,481) $ (320,255) $ (14,198) $ (334,453) NINE MONTHS ENDED SEPTEMBER 30, 2022 NINE MONTHS ENDED SEPTEMBER 30, 2021 FOREIGN CHANGE IN FAIR VALUE OF TOTAL FOREIGN CHANGE IN FAIR VALUE OF TOTAL Beginning of Period $ (341,024) $ 2,677 $ (338,347) $ (206,190) $ (49,703) $ (255,893) Other comprehensive (loss) income: Foreign currency translation and other adjustments (334,344) — (334,344) (114,065) — (114,065) Change in fair value of derivative instruments — 83,210 83,210 — 35,505 35,505 Total other comprehensive (loss) income (334,344) 83,210 (251,134) (114,065) 35,505 (78,560) End of Period $ (675,368) $ 85,887 $ (589,481) $ (320,255) $ (14,198) $ (334,453) H. REVENUES The costs associated with the initial movement of customer records into physical storage and certain commissions are considered costs to obtain or fulfill customer contracts (collectively, "Contract Fulfillment Costs"). Contract Fulfillment Costs as of September 30, 2022 and December 31, 2021 are as follows: SEPTEMBER 30, 2022 DECEMBER 31, 2021 GROSS ACCUMULATED NET GROSS ACCUMULATED NET Intake Costs asset $ 63,856 $ (40,045) $ 23,811 $ 71,336 $ (42,678) $ 28,658 Commissions asset 124,081 (54,948) 69,133 114,791 (50,553) 64,238 Deferred revenue liabilities are reflected in our Condensed Consolidated Balance Sheets as follows: DESCRIPTION LOCATION IN BALANCE SHEET SEPTEMBER 30, 2022 DECEMBER 31, 2021 Deferred revenue - Current Deferred revenue $ 282,687 $ 307,470 Deferred revenue - Long-term Other Long-term Liabilities 31,234 33,691 DATA CENTER LESSOR CONSIDERATIONS Our Global Data Center Business features storage rental provided to customers at contractually specified rates over a fixed contractual period, which are accounted for in accordance with Accounting Standards Codification ("ASC") No. 842 ("ASC 842"), Leases, as amended. Storage rental revenue, including revenue associated with power and connectivity, associated with our Global Data Center Business for the three and nine months ended September 30, 2022 and 2021 are as follows: THREE MONTHS ENDED NINE MONTHS ENDED 2022 2021 2022 2021 Storage rental revenue (1) $ 96,328 $ 72,411 $ 273,547 $ 210,805 I. STOCK-BASED COMPENSATION Our stock-based compensation expense includes the cost of stock options, restricted stock units ("RSUs"), performance units ("PUs") and shares of stock issued under our employee stock purchase plan ("ESPP") (together, the "Employee Stock-Based Awards"). 2022 RETIREMENT ELIGIBLE CRITERIA For our Employee Stock-Based Awards made on or after March 1, 2022, we have included the following retirement provision: • Upon an award recipient's retirement on or after attaining age 55 with at least five years of service, if the sum of (i) the award recipient’s age at retirement and (ii) the award recipient’s years of service with us totals at least 65, the award recipient is entitled to continued vesting of any outstanding Employee Stock-Based Awards, provided that their retirement occurs on or after a minimum of six months from the grant date (the "Retirement Criteria"). • Accordingly, (i) grants of Employee Stock-Based Awards to an employee who has met the Retirement Criteria on or before the date of grant, or will meet the Retirement Criteria before the six month anniversary in the year of the grant, will be expensed over six months from the date of grant and (ii) grants of Employee Stock-Based Awards to employees who will meet the Retirement Criteria during the award’s normal vesting period will be expensed between the date of grant and the date upon which the award recipient meets the Retirement Criteria. • Stock options and RSUs granted to award recipients who meet the Retirement Criteria will be delivered to the award recipient based upon the original vesting schedule. If an award recipient retires and has met the Retirement Criteria, stock options will remain exercisable until the original expiration date of the stock options. PUs granted to award recipients who meet the Retirement Criteria will be delivered in accordance with the original vesting schedule of the applicable PU award and remain subject to the same performance conditions. STOCK-BASED COMPENSATION EXPENSE Stock-based compensation expense for the Employee Stock-Based Awards for the three and nine months ended September 30, 2022 and 2021 is as follows: THREE MONTHS ENDED NINE MONTHS ENDED 2022 2021 2022 2021 Stock-based compensation expense $ 14,326 $ 13,200 $ 45,923 $ 46,852 As of September 30, 2022, unrecognized compensation cost related to the unvested portion of our Employee Stock-Based Awards is $52,664. RESTRICTED STOCK UNITS AND PERFORMANCE UNITS The fair value of RSUs and earned PUs that vested during the three and nine months ended September 30, 2022 and 2021 is as follows: THREE MONTHS ENDED NINE MONTHS ENDED 2022 2021 2022 2021 Fair value of RSUs vested $ 4,748 $ 8,425 $ 26,307 $ 31,404 Fair value of earned PUs that vested 13,622 22,030 17,968 27,856 J. ACQUISITION AND INTEGRATION COSTS Acquisition and integration costs represent operating expenditures directly associated with the closing and integration activities of our business acquisitions that have closed, or are highly probable of closing, and include (i) advisory, legal and professional fees to complete business acquisitions and (ii) costs to integrate acquired businesses into our existing operations, including move, severance, facility upgrade and system integration costs (collectively, "Acquisition and Integration Costs"). Acquisition and Integration Costs do not include costs associated with the formation of joint ventures or costs associated with the acquisition of customer relationships. Total Acquisition and Integration Costs is $5,554 and $38,093 for the three and nine months ended September 30, 2022, respectively, and $1,138 and $3,415 for the three and nine months ended September 30, 2021, respectively. K. (GAIN) LOSS ON DISPOSAL/WRITE-DOWN OF PROPERTY, PLANT AND EQUIPMENT, NET (Gain) loss on disposal/write-down of property, plant and equipment, net for the three and nine months ended September 30, 2022 and 2021 is as follows: THREE MONTHS ENDED NINE MONTHS ENDED 2022 (1) 2021 2022 (1) 2021 (2) (Gain) Loss on disposal/write-down of property, plant and equipment, net (3) $ (14,170) $ (935) $ (66,124) $ (134,321) (1) The gain for the nine months ended September 30, 2022 primarily consists of gains of approximately $66,000 associated with sale and sale-leaseback transactions, of which (i) approximately $17,000 relates to sale-leaseback transactions of two facilities in the United States and one in Canada during the third quarter of 2022 and (ii) approximately $49,000 relates to sale and sale-leaseback transactions of 11 facilities and parcels of land in the United States during the second quarter of 2022. (2) The gain for the nine months ended September 30, 2021 primarily consists of gains of approximately $127,400 associated with sale-leaseback transactions of five facilities in the United Kingdom during the second quarter of 2021. (3) The gains recognized during both 2022 and 2021 are the result of our program to monetize a small portion of our industrial assets through sale and sale-leaseback transactions. The terms for these leases are consistent with the terms of our lease portfolio, which are disclosed in detail in Note 2.i. to Notes to Consolidated Financial Statements included in our Current Report. L. OTHER (INCOME) EXPENSE, NET Other (income) expense, net for the three and nine months ended September 30, 2022 and 2021 consists of the following: THREE MONTHS ENDED SEPTEMBER 30, NINE MONTHS ENDED DESCRIPTION 2022 2021 2022 2021 Foreign currency transaction (gains) losses, net (1) $ (58,519) $ (23,200) $ (126,759) $ (16,157) Debt extinguishment expense — — 671 — Other, net (2)(3) 5,649 4,699 87,902 (183,861) Other (Income) Expense, Net $ (52,870) $ (18,501) $ (38,186) $ (200,018) (1) We recognized net foreign currency transaction gains of $58,519 and $126,759 for the three and nine months ended September 30, 2022, respectively. These gains primarily consist of the impact of changes in the exchange rate of the Euro and the British pound sterling against the United States dollar on our intercompany balances with and between certain of our subsidiaries. (2) On March 24, 2022, as a result of our loss of control, we deconsolidated the businesses included in the acquisition of OSG Records Management (Europe) Limited, excluding Ukraine. We recognized a loss of approximately $105,800 associated with the deconsolidation to Other expense (income), net in the first quarter of 2022 representing the difference between the net asset value prior to the deconsolidation and the subsequent remeasurement of the retained investment to a fair value of zero. We have concluded that the deconsolidation does not meet the criteria to be reported as discontinued operations in our consolidated financial statements, as it does not represent a strategic shift that will have a major effect on our operations and financial results. The loss was partially offset by a gain recorded in the first quarter of 2022 of approximately $35,800 associated with the Clutter Transaction (as defined in Note 4). (3) Other, net for the nine months ended September 30, 2021 is primarily comprised of (a) a gain of approximately $180,600 associated with our IPM Divestment (as defined and discussed in Note 4 to Notes to Consolidated Financial Statements included in our Current Report) and (b) a gain of approximately $20,300 associated with the loss of control and related deconsolidation, as of May 18, 2021, of one of our wholly owned Netherlands subsidiaries, for which we had value-added tax liability exposure that was recorded in 2019. M. INCOME TAXES We provide for income taxes during interim periods based on our estimate of the effective tax rate for the year. Our effective tax rates for the three and nine months ended September 30, 2022 and 2021 are as follows: THREE MONTHS ENDED SEPTEMBER 30, NINE MONTHS ENDED 2022 (1) 2021 (2) 2022 (1) 2021 (2) Effective Tax Rate 11.0 % 29.1 % 10.7 % 28.1 % (1) The primary reconciling items between the federal statutory tax rate of 21.0% and our overall effective tax rate for the three and nine months ended September 30, 2022 were the benefits derived from the dividends paid deduction and the differences in the tax rates to which our foreign earnings are subject. In addition, there were gains and losses recorded in Other (income) expense, net and Gain (loss) on disposal/write-down of property, plant and equipment, net, during the period for which there was an insignificant tax impact. During the first quarter of 2022, there was also a release of valuation allowances on deferred tax assets of our U.S. taxable REIT subsidiaries ("TRS") of approximately $9,900 as a result of the ITRenew Transaction. (2) The primary reconciling items between the federal statutory tax rate of 21.0% and our overall effective tax rate for the three and nine months ended September 30, 2021 were the impacts of differences in the tax rates at which our foreign earnings are subject, partially offset by the benefits derived from the dividends paid deduction. The costs associated with Project Summit (as defined in Note 11) are more heavily weighted to our United States qualified REIT subsidiaries ("QRSs"), and, therefore, provide no tax benefit. Additionally, the nine months ended September 30, 2021 reflects a discrete tax expense of approximately $12,000 primarily resulting from a tax law change in the United Kingdom. N. INCOME (LOSS) PER SHARE—BASIC AND DILUTED The calculation of basic and diluted income (loss) per share for the three and nine months ended September 30, 2022 and 2021 are as follows: THREE MONTHS ENDED SEPTEMBER 30, NINE MONTHS ENDED 2022 2021 2022 2021 Net Income (Loss) $ 192,931 $ 68,111 $ 436,496 $ 391,264 Less: Net Income (Loss) Attributable to Noncontrolling Interests 767 428 1,952 2,693 Net Income (Loss) Attributable to Iron Mountain Incorporated (utilized in numerator of Earnings Per Share calculation) $ 192,164 $ 67,683 $ 434,544 $ 388,571 Weighted-average shares—basic 290,937,000 289,762,000 290,673,000 289,255,000 Effect of dilutive potential stock options 1,133,952 869,600 1,126,280 522,642 Effect of dilutive potential RSUs and PUs 480,919 850,655 494,956 918,954 Weighted-average shares—diluted 292,551,871 291,482,255 292,294,236 290,696,596 Net Income (Loss) Per Share Attributable to Iron Mountain Incorporated: Basic $ 0.66 $ 0.23 $ 1.49 $ 1.34 Diluted $ 0.66 $ 0.23 $ 1.49 $ 1.34 Antidilutive stock options, RSUs and PUs, excluded from the calculation 220,421 351,673 403,362 1,813,880

Acquisitions

Acquisitions	9 Months Ended
	Sep. 30, 2022
Business Combination and Asset Acquisition [Abstract]
Acquisitions	On January 25, 2022, in order to expand our ALM operations, we acquired an approximately 80% interest in Intercept Parent, Inc. ("ITRenew") at an agreed upon purchase price of $725,000, subject to certain working capital adjustments at, and subsequent to, the closing (the "ITRenew Transaction"). At closing, we paid $748,846 and acquired $30,720 of cash on hand, for a net purchase price of $718,126 for the ITRenew Transaction. The acquisition agreement provides us the option to purchase, and provides the shareholders of ITRenew the option to sell, the remaining approximately 20% interest in ITRenew as follows: (i) approximately 16% on or after the second anniversary of the ITRenew Transaction and (ii) approximately 4% on or after the third anniversary of the ITRenew Transaction (collectively, the "Remaining Interests"). The total payments for the Remaining Interests, based on the achievement of certain targeted performance metrics, will be no less than $200,000 and no more than $531,000 (the "Deferred Purchase Obligation"). The maximum amount of the Deferred Purchase Obligation would require achievement of the targeted performance metrics at approximately two times the level that is assumed in our fair value estimate of the Deferred Purchase Obligation of $275,100. From January 25, 2022, we consolidate 100% of the revenues and expenses associated with this business. The Deferred Purchase Obligation is reflected as a long-term liability in our Condensed Consolidated Balance Sheet at September 30, 2022, and, accordingly, we have not reflected any non-controlling interests associated with the ITRenew Transaction as the Remaining Interests have non-substantive equity interest rights. Subsequent increases or decreases in the fair value estimate of the Deferred Purchase Obligation will be included as a component of Other (income) expense, net in our Consolidated Statements of Operations until the Deferred Purchase Obligation is settled or paid. ITRenew is presented in Corporate and Other Business (as disclosed in Note 9) and primarily operates in the United States. PRO FORMA FINANCIAL INFORMATION The unaudited consolidated pro forma financial information (the "Pro Forma Financial Information") below summarizes the combined results of Iron Mountain and ITRenew on a pro forma basis as if the ITRenew Transaction had occurred on January 1, 2021. The Pro Forma Financial Information is presented for informational purposes and is not necessarily indicative of the results of operations that would have been achieved if the acquisition had taken place on January 1, 2021. The Pro Forma Financial Information, for the periods presented, includes purchase accounting adjustments (including amortization of acquired customer and supplier intangible assets and depreciation of acquired property, plant and equipment) and related tax effects. Through September 30, 2022, we and ITRenew collectively incurred $59,370 of operating expenditures to complete the ITRenew Transaction (including advisory and professional fees required to complete the ITRenew Transaction). These operating expenditures have been reflected within the results of operations in the Pro Forma Financial Information as if they were incurred on January 1, 2021. THREE MONTHS ENDED SEPTEMBER 30, NINE MONTHS ENDED 2022 2021 2022 2021 Total Revenues $ 1,286,945 $ 1,234,386 $ 3,842,499 $ 3,675,396 Income from Continuing Operations $ 192,931 $ 70,491 $ 436,627 $ 341,096 In addition to our acquisition of ITRenew, we completed certain other acquisitions in 2021 and 2022. The Pro Forma Financial Information does not reflect these acquisitions due to the insignificant impact of these acquisitions on our consolidated results of operations. OTHER 2022 ACQUISITIONS In addition to the ITRenew Transaction, during the nine months ended September 30 , 2022, in order to enhance our existing operations in Morocco and expand our fine arts operations in China - Hong Kong S.A.R. and North America, we completed the acquisitions of a records management company, a fine arts company and the assets of a second fine arts company, for a total purchase price of approximately $11,000, including deferred purchase obligation, purchase price holdbacks and other deferred payments of approximately $4,600. PRELIMINARY PURCHASE PRICE ALLOCATION A summary of the cumulative consideration paid and the preliminary allocation of the purchase price paid for all of our 2022 acquisitions through September 30, 2022 is as follows: NINE MONTHS ENDED SEPTEMBER 30, 2022 Cash Paid (gross of cash acquired) (1) $ 756,003 Deferred Purchase Obligation, Purchase Price Holdbacks and Other (2) 279,734 Total Consideration 1,035,737 Fair Value of Identifiable Assets Acquired and Liabilities Assumed: Cash 31,571 Accounts Receivable, Prepaid Expenses and Other Assets 73,351 Property, Plant and Equipment 7,893 Customer and Supplier Relationship Intangible Assets (3) 491,422 Other Intangible Assets (3) 47,300 Operating Lease Right-of-Use Assets 32,680 Accounts Payable, Accrued Expenses and Other Liabilities (60,683) Operating Lease Liabilities (32,680) Deferred Income Taxes (142,019) Total Fair Value of Identifiable Net Assets Acquired 448,835 Goodwill Initially Recorded (4) $ 586,902 (1) Cash paid for acquisitions, net of cash acquired in our Condensed Consolidated Statement of Cash Flows includes contingent and other payments received of $219 for the nine months ended September 30, 2022 related to acquisitions made in the years prior to 2022. (2) Deferred purchase obligation, purchase price holdbacks and other includes $275,100 related to the fair value estimate of the Deferred Purchase Obligation for the Remaining Interests and approximately $4,600 of deferred purchase obligation, purchase price holdbacks and other associated with our other business and asset acquisitions completed in 2022. (3) The preliminary weighted average life of the intangible assets acquired in the ITRenew Transaction is approximately 11 years. Intangible assets are included as a component of Other assets, net in our Condensed Consolidated Balance Sheets. (4) Goodwill is primarily attributable to the assembled workforce, expanded market opportunities and costs and other operating synergies anticipated upon the integration of the operations of us and the acquired businesses. The preliminary purchase price allocations that are not finalized as of September 30, 2022 relate to the final assessment of the fair values of intangible assets (primarily customer and supplier relationship intangible assets) and property, plant and equipment associated with the acquisitions we closed in 2022. Any adjustments to our estimates of purchase price allocation will be made in the periods in which the adjustments are determined, but no later than the one year measurement period, and the cumulative effect of such adjustments will be calculated as if the adjustments had been completed as of the acquisition dates. Adjustments recorded during the nine months ended September 30, 2022 were not material to our results from operations.

Investments

Investments	9 Months Ended
	Sep. 30, 2022
Investments, All Other Investments [Abstract]
Investments	In February 2022, the joint venture formed by MakeSpace Labs, Inc. and us (the "MakeSpace JV") entered into an agreement with Clutter, Inc. ("Clutter") pursuant to which the equityholders of the MakeSpace JV contributed their ownership interests in the MakeSpace JV and Clutter’s shareholders contributed their ownership interests in Clutter to create a newly formed venture (the "Clutter JV"). In exchange for our 49.99% interest in the MakeSpace JV, we received an approximate 27% interest in the Clutter JV (the "Clutter Transaction"). As a result of the Clutter Transaction, we recognized a gain related to our contributed interest in the MakeSpace JV of approximately $35,800, which was recorded to Other, net, a component of Other expense (income), net during the first quarter of 2022. In April 2021, we closed on an agreement to form a joint venture (the "Web Werks JV") with the shareholders of Web Werks India Private Limited ("Web Werks"), a colocation data center provider in India. In connection with the formation of the Web Werks JV, we made an initial investment of approximately 3,750,000 Indian rupees (or approximately $50,100, based upon the exchange rate between the United States dollar and Indian rupee as of the closing date of the initial investment) in exchange for a noncontrolling interest in the form of convertible preference shares in the Web Werks JV (the "Initial Web Werks JV Investment"). Under the terms of the Web Werks JV shareholder agreement, we are required to make additional investments over a period ending May 2023 totaling approximately 7,500,000 Indian rupees. In August 2022, we made an additional investment of approximately 3,750,000 Indian rupees (or approximately $46,100, based on the exchange rate between the United States dollar and Indian rupee as of the date of the additional investment) in exchange for an additional interest in the form of convertible preference shares in the Web Werks JV (the "Second Web Werks JV Investment"). The shares we received from the Initial Web Werks JV Investment and the Second Web Werks JV Investment are convertible into a to-be-determined amount of equity shares determined by a valuation based on the earnings before interest, taxes, depreciation and amortization ("EBITDA") of the Web Werks JV for the trailing twelve months ending July 31, 2022. Subsequent to the Second Web Werks JV Investment, the shareholders of Web Werks retained control of the financial and operating decisions of the Web Werks JV through their control of Web Werks' board of directors. As we do not control the board of directors or the key management decisions of the Web Werks JV, we account for our interest in the Web Werks JV as an equity method investment. The following joint ventures are accounted for as equity method investments and are presented as a component of Other within Other assets, net in our Condensed Consolidated Balance Sheets. The carrying values and equity interests in our joint ventures at September 30, 2022 and December 31, 2021 are as follows: SEPTEMBER 30, 2022 DECEMBER 31, 2021 CARRYING VALUE EQUITY INTEREST CARRYING VALUE EQUITY INTEREST Web Werks JV $ 97,877 55.40 % $ 51,140 38.50 % Joint venture with AGC Equity Partners (the "Frankfurt JV") 27,004 20.00 % 26,167 20.00 % MakeSpace JV — — % 30,154 49.99 % Clutter JV 57,113 26.73 % — — %

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activities	9 Months Ended
	Sep. 30, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities	Derivative instruments we are party to include: (i) interest rate swap agreements (which are designated as cash flow hedges) and (ii) cross-currency swap agreements (which are designated as net investment hedges). INTEREST RATE SWAP AGREEMENTS DESIGNATED AS CASH FLOW HEDGES In March 2018, we entered into interest rate swap agreements to limit our exposure to changes in interest rates on a portion of our floating rate indebtedness. These swap agreements expired in March 2022. In July 2019, we entered into forward-starting interest rate swap agreements to limit our exposure to changes in interest rates on a portion of our floating rate indebtedness. As of September 30, 2022, we had $350,000 in notional value outstanding on the interest rate swap agreements, which expire in March 2024 ("March 2024 Interest Rate Swap Agreements"). Under the interest rate swap agreements, we receive variable rate interest payments associated with the notional amount of each interest rate swap, based upon one-month LIBOR, in exchange for the payment of fixed interest rates as specified in the interest rate swap agreements. We have designated these interest rate swap agreements as cash flow hedges. Unrealized gains are recognized as assets, while unrealized losses are recognized as liabilities. CROSS-CURRENCY SWAP AGREEMENTS DESIGNATED AS A HEDGE OF NET INVESTMENT In August 2019, we entered into cross-currency swap agreements to hedge the variability of exchange rate impacts between the United States dollar and the Euro. Under the terms of the cross-currency swap agreements, we notionally exchanged approximately $110,000 at an interest rate of 6.0% for approximately 99,055 Euros at a weighted average interest rate of approximately 3.65%. These cross-currency swap agreements expire in August 2023 ("August 2023 Cross-Currency Swap Agreements"). In September 2020, we entered into cross-currency swap agreements to hedge the variability of exchange rate impacts between the United States dollar and the Euro. Under the terms of the cross-currency swap agreements, we notionally exchanged approximately $359,200 at an interest rate of 4.5% for 300,000 Euros at a weighted average interest rate of approximately 3.4%. These cross-currency swap agreements were set to expire in February 2026. In May 2022, these cross-currency swaps were amended ("February 2026 Cross-Currency Swap Agreements"). Under the terms of the February 2026 Cross-Currency Swap Agreements, we notionally exchanged approximately $359,200 at an interest rate of 4.5% for approximately 340,500 Euros at a weighted average interest rate of approximately 1.2%. These February 2026 Cross-Currency Swap Agreements are set to expire in February 2026. We have designated these cross-currency swap agreements as a hedge of net investment against certain of our Euro denominated subsidiaries and they require an exchange of the notional amounts at maturity. These cross-currency swap agreements are marked to market at each reporting period, representing the fair values of the cross-currency swap agreements, and any changes in fair value are recognized as a component of Accumulated other comprehensive items, net. Unrealized gains are recognized as assets while unrealized losses are recognized as liabilities. Assets (liabilities) recognized in our Condensed Consolidated Balance Sheets at September 30, 2022 and December 31, 2021, by derivative instrument, are as follows: DERIVATIVE INSTRUMENTS (1) SEPTEMBER 30, 2022 DECEMBER 31, 2021 Cash Flow Hedges (2) March 2024 Interest Rate Swap Agreements $ 12,879 $ (7,680) Net Investment Hedges (3) August 2023 Cross-Currency Swap Agreements 12,938 (664) February 2026 Cross-Currency Swap Agreements 60,070 11,021 (1) Our derivative assets are included as a component of (i) Prepaid expenses and other or (ii) Other within Other assets, net in our Condensed Consolidated Balance Sheets and our derivative liabilities are included as a component of (i) Accrued expenses and other current liabilities or (ii) Other long-term liabilities in our Condensed Consolidated Balance Sheets. As of September 30, 2022, $12,938 is included within Prepaid expenses and other and $72,949 is included within Other assets. As of December 31, 2021, $11,021 is included within Other assets, $2,082 is included within Accrued expense and other current liabilities and $6,262 is included within Other long-term liabilities. (2) As of September 30, 2022, cumulative net gains of $12,879 are recorded within Accumulated other comprehensive items, net associated with these interest rate swap agreements. (3) As of September 30, 2022, cumulative net gains of $73,008 are recorded within Accumulated other comprehensive items, net associated with these cross-currency swap agreements. Unrealized gains (losses) recognized during the three and nine months ended September 30, 2022 and 2021, by derivative instrument, are as follows: THREE MONTHS ENDED SEPTEMBER 30, NINE MONTHS ENDED SEPTEMBER 30, DERIVATIVE INSTRUMENTS (1) 2022 2021 2022 2021 Cash Flow Hedges March 2024 Interest Rate Swap Agreements $ 5,157 $ 1,950 $ 20,559 $ 7,946 Net Investment Hedges August 2023 Cross-Currency Swap Agreements 6,771 2,655 13,602 5,933 February 2026 Cross-Currency Swap Agreements 20,305 10,060 49,049 21,626 (1) These amounts are recognized as unrealized gains (losses), a component of Accumulated other comprehensive items, net.

Debt

Debt	9 Months Ended
	Sep. 30, 2022
Debt Disclosure [Abstract]
Debt	Long-term debt is as follows: SEPTEMBER 30, 2022 DECEMBER 31, 2021 DEBT (INCLUSIVE OF DISCOUNT) UNAMORTIZED DEFERRED FINANCING COSTS CARRYING AMOUNT FAIR VALUE DEBT (INCLUSIVE OF DISCOUNT) UNAMORTIZED DEFERRED FINANCING COSTS CARRYING AMOUNT FAIR VALUE Revolving Credit Facility $ 890,000 $ (7,899) $ 882,101 $ 890,000 $ — $ (5,174) $ (5,174) $ — Term Loan A 243,750 — 243,750 243,750 203,125 — 203,125 203,125 Term Loan B 667,766 (4,059) 663,707 668,500 672,847 (4,995) 667,852 675,500 Australian Dollar Term Loan 193,140 (464) 192,676 193,140 223,182 (656) 222,526 223,530 UK Bilateral Revolving Credit Facility 155,887 (175) 155,712 155,887 189,168 (709) 188,459 189,168 3 7 / 8 % GBP Senior Notes due 2025 (the "GBP Notes") 445,392 (2,593) 442,799 392,373 540,481 (3,912) 536,569 542,508 4 7 / 8 % Senior Notes due 2027 (the "4 7 / 8 % Notes due 2027") (1) 1,000,000 (7,110) 992,890 892,500 1,000,000 (8,176) 991,824 1,030,000 5 1 / 4 % Senior Notes due 2028 (the "5 1 / 4 % Notes due 2028") (1) 825,000 (6,495) 818,505 719,813 825,000 (7,380) 817,620 862,125 5% Senior Notes due 2028 (the "5% Notes due 2028") (1) 500,000 (4,220) 495,780 428,750 500,000 (4,763) 495,237 513,750 4 7 / 8 % Senior Notes due 2029 (the "4 7 / 8 % Notes due 2029") (1) 1,000,000 (10,126) 989,874 815,000 1,000,000 (11,211) 988,789 1,022,500 5 1 / 4 % Senior Notes due 2030 (the "5 1 / 4 % Notes due 2030") (1) 1,300,000 (11,783) 1,288,217 1,072,500 1,300,000 (12,911) 1,287,089 1,355,250 4 1 / 2 % Senior Notes due 2031 (the "4 1 / 2 % Notes") (1) 1,100,000 (10,471) 1,089,529 847,000 1,100,000 (11,404) 1,088,596 1,094,500 5% Senior Notes due 2032 (the "5% Notes due 2032") 750,000 (12,827) 737,173 579,375 750,000 (13,782) 736,218 767,813 5 5 / 8 % Senior Notes due 2032 (the "5 5 / 8 % Notes") (1) 600,000 (5,711) 594,289 477,000 600,000 (6,147) 593,853 637,500 Real Estate Mortgages, Financing Lease Liabilities and Other 407,646 (643) 407,003 407,646 460,648 (840) 459,808 460,648 Accounts Receivable Securitization Program 316,700 (584) 316,116 316,700 — (450) (450) — Total Long-term Debt 10,395,281 (85,160) 10,310,121 9,364,451 (92,510) 9,271,941 Less Current Portion (81,275) — (81,275) (310,084) 656 (309,428) Long-term Debt, Net of Current Portion $ 10,314,006 $ (85,160) $ 10,228,846 $ 9,054,367 $ (91,854) $ 8,962,513 (1) Collectively, the "Parent Notes". See Note 7 to Notes to Consolidated Financial Statements included in our Current Report for additional information regarding our long-term debt, including the direct obligors of each of our debt instruments as well as information regarding the fair value of our debt instruments (including the levels of the fair value hierarchy used to determine the fair value of our debt instruments). The levels of the fair value hierarchy used to determine the fair value of our debt as of September 30, 2022 are consistent with the levels of the fair value hierarchy used to determine the fair value of our debt as of December 31, 2021 (which are disclosed in our Current Report). CREDIT AGREEMENT Our credit agreement (the "Credit Agreement") consists of a revolving credit facility (the "Revolving Credit Facility"), a term loan A (the "Term Loan A") and a term loan B (the "Term Loan B"). On March 18, 2022, we entered into an amendment to the Credit Agreement, which included the following changes: (i) extended the maturity date of the Revolving Credit Facility and Term Loan A from June 3, 2023 to March 18, 2027; (ii) refinanced and increased the borrowing capacity that IMI and certain of its United States and foreign subsidiaries are able to borrow under the Revolving Credit Facility from $1,750,000 to $2,250,000; (iii) refinanced the existing Term Loan A with a new $250,000 Term Loan A; and (iv) increased the net total lease adjusted leverage ratio maximum allowable from 6.5x to 7.0x and removed the net secured lease adjusted leverage ratio requirement. On March 18, 2022, we borrowed the full amount of the Term Loan A. As of September 30, 2022, we had $890,000, $243,750 and $668,500 of outstanding borrowings under the Revolving Credit Facility, Term Loan A and Term Loan B, respectively. In addition, we also had various outstanding letters of credit totaling $3,779. The remaining amount available for borrowing under the Revolving Credit Facility as of September 30, 2022 was $1,356,221 (which represents the maximum availability as of such date). Additionally, the Credit Agreement permits us to incur incremental indebtedness thereunder by adding new term loans or revolving loans or by increasing the principal amount of any existing loans thereunder, subject to a cap contained therein. REVOLVING CREDIT FACILITY $2,250,000 TERM LOAN A $250,000 TERM LOAN B $700,000 Outstanding borrowings $890,000 Aggregate outstanding principal amount $243,750 Aggregate outstanding principal amount $668,500 4.7% Interest rate 4.9% Interest rate 4.2% Interest rate As of September 30, 2022 As of September 30, 2022 As of September 30, 2022 AUSTRALIAN DOLLAR TERM LOAN Iron Mountain Australia Group Pty, Ltd. ("IM Australia"), a wholly owned subsidiary of IMI, has an AUD term loan with an original principal balance of 350,000 Australian dollars ("AUD Term Loan"). On March 18, 2022, IM Australia amended its AUD Term Loan to (i) extend the maturity date from September 22, 2022 to September 30, 2026 and (ii) decrease the interest rate from BBSY (an Australian benchmark variable interest rate) plus 3.875% to BBSY plus 3.625%. All other terms of the AUD Term Loan remain consistent with what was disclosed in Note 7 to Notes to Consolidated Financial Statements included in our Current Report. OUTSTANDING BORROWINGS AU$302,041 INTEREST RATE 6.7% As of September 30, 2022 UK BILATERAL REVOLVING CREDIT FACILITY MAXIMUM AMOUNT £140,000 OPTIONAL ADDITIONAL COMMITMENTS £125,000 INTEREST RATE 4.2% As of September 30, 2022 Iron Mountain (UK) PLC and Iron Mountain (UK) Data Centre Limited (collectively, the "UK Borrowers") have a British pounds sterling Revolving Credit Facility (the "UK Bilateral Revolving Credit Facility") with Barclays Bank PLC. The maximum amount permitted to be borrowed under the UK Bilateral Revolving Credit Facility is 140,000 British pounds sterling, which was fully drawn as of September 30, 2022. We have the option to request additional commitments of up to 125,000 British pounds sterling, subject to conditions specified in the UK Bilateral Revolving Credit Facility. On September 22, 2022, the UK Borrowers exercised their option to extend the maturity date from September 24, 2023 to September 24, 2024. All other material terms of the UK Bilateral Revolving Credit Facility remain consistent with what was disclosed in Note 7 to Notes to Consolidated Financial Statements included in our Current Report. ACCOUNTS RECEIVABLE SECURITIZATION PROGRAM On June 29, 2022, we amended the Accounts Receivable Securitization Program to (i) increase the maximum borrowing capacity from $300,000 to $325,000, with an option to increase the borrowing capacity to $400,000, (ii) change the interest rate under Accounts Receivable Securitization Program from LIBOR plus 1.0% to SOFR plus 0.95%, with a credit spread adjustment of 0.10% and (iii) extend the maturity date from July 1, 2023 to July 1, 2025, at which point all obligations become due. All other material terms of the Accounts Receivable Securitization Program remain consistent with what was disclosed in Note 7 to Notes to Consolidated Financial Statements included in our Current Report. MAXIMUM AMOUNT $325,000 OUTSTANDING BORROWING $316,700 INTEREST RATE 4.1% As of September 30, 2022 CASH POOLING During the third quarter of 2022, we entered into two new cash pooling arrangements with JP Morgan Chase Bank, N.A. ("JPM"), one of which we utilize to manage global liquidity requirements for our QRSs in the Europe, Middle East, and Africa regions (the "JPM QRS EMEA Cash Pool") and the other for our TRSs in the Europe, Middle East, and Africa regions (the "JPM TRS EMEA Cash Pool"). We continue to utilize our two other cash pooling arrangements with JPM, one of which we utilize to manage global liquidity requirements for our QRSs in the Asia Pacific region (the "JPM QRS APAC Cash Pool") and the other for our TRSs in the Asia Pacific region (the "JPM TRS APAC Cash Pool"). Additionally, we utilize two separate cash pooling arrangements with Bank Mendes Gans ("BMG"), one of which we utilize to manage global liquidity requirements for our QRSs (the "BMG QRS Cash Pool") and the other for our TRSs (the "BMG TRS Cash Pool"). The approximate amount of the net cash position for our cash pools and the approximate amount of the gross position and outstanding debit balances for each of these pools as of September 30, 2022 and December 31, 2021 are as follows: SEPTEMBER 30, 2022 DECEMBER 31, 2021 GROSS CASH POSITION OUTSTANDING DEBIT BALANCES NET CASH POSITION GROSS CASH POSITION OUTSTANDING DEBIT BALANCES NET CASH POSITION BMG QRS Cash Pool $ 590,127 $ (588,633) $ 1,494 $ 552,900 $ (552,100) $ 800 BMG TRS Cash Pool 539,557 (538,498) 1,059 606,000 (603,900) 2,100 JPM QRS APAC Cash Pool 23,561 (23,394) 167 9,400 (9,200) 200 JPM TRS APAC Cash Pool 22,272 (21,899) 373 12,000 (9,900) 2,100 JPM QRS EMEA Cash Pool 6,030 (5,718) 312 — — — JPM TRS EMEA Cash Pool 2,104 (2,044) 60 — — — The net cash position balances as of September 30, 2022 and December 31, 2021 are reflected as cash and cash equivalents in our Condensed Consolidated Balance Sheets. LETTERS OF CREDIT As of September 30, 2022, we had outstanding letters of credit totaling $37,221, of which $3,779 reduce our borrowing capacity under the Revolving Credit Facility (as described above). The letters of credit expire at various dates between October 2022 and January 2033. DEBT COVENANTS The Credit Agreement, our bond indentures and other agreements governing our indebtedness contain certain restrictive financial and operating covenants, including covenants that restrict our ability to complete acquisitions, pay cash dividends, incur indebtedness, make investments, sell assets and take other specified corporate actions. The covenants do not contain a rating trigger. Therefore, a change in our debt rating would not trigger a default under the Credit Agreement, our bond indentures or other agreements governing our indebtedness. The Credit Agreement requires that we satisfy a fixed charge coverage ratio and a net total lease adjusted leverage ratio on a quarterly basis and our bond indentures require that, among other things, we satisfy a leverage ratio (not lease adjusted) or a fixed charge coverage ratio (not lease adjusted), as a condition to taking actions such as paying dividends and incurring indebtedness. The Credit Agreement uses earnings before interest, taxes, depreciation and amortization and rent expense ("EBITDAR") based calculations and the bond indentures use EBITDA based calculations as the primary measures of financial performance for purposes of calculating leverage and fixed charge coverage ratios. The EBITDAR- and EBITDA-based leverage calculations include our consolidated subsidiaries, other than those we have designated as "Unrestricted Subsidiaries" as defined in the Credit Agreement and bond indentures. Generally, the Credit Agreement and the bond indentures use a trailing four fiscal quarter basis for purposes of the relevant calculations and require certain adjustments and exclusions for purposes of those calculations, which make the calculation of financial performance for purposes of those calculations under the Credit Agreement and bond indentures not directly comparable to Adjusted EBITDA as presented herein. We are in compliance with our leverage and fixed charge coverage ratios under the Credit Agreement, our bond indentures and other agreements governing our indebtedness as of September 30, 2022 and December 31, 2021. Noncompliance with these leverage and fixed charge coverage ratios would have a material adverse effect on our financial condition.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2022
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	We are involved in litigation from time to time in the ordinary course of business, including litigation arising from damage to customer assets in our facilities caused by fires and other natural disasters. While the outcome of such litigation is inherently uncertain, we do not believe any current litigation will have a material adverse effect on our consolidated financial condition, results of operations or cash flows. We have estimated a reasonably possible range for all loss contingencies and believe it is reasonably possible that we could incur aggregate losses in addition to amounts currently accrued for all matters up to an additional $24,000 over the next several years, of which certain amounts would be covered by insurance or indemnity arrangement.

Stockholders' Equity Matters

Stockholders' Equity Matters	9 Months Ended
	Sep. 30, 2022
Equity [Abstract]
Stockholders' Equity Matters	STOCKHOLDERS' EQUITY MATTERS In fiscal year 2021 and the nine months ended September 30, 2022, our board of directors declared the following dividends: DECLARATION DATE DIVIDEND RECORD DATE TOTAL PAYMENT DATE February 24, 2021 $ 0.6185 March 15, 2021 $ 178,569 April 6, 2021 May 6, 2021 0.6185 June 15, 2021 179,026 July 6, 2021 August 5, 2021 0.6185 September 15, 2021 179,080 October 6, 2021 November 4, 2021 0.6185 December 15, 2021 179,132 January 6, 2022 February 24, 2022 0.6185 March 15, 2022 179,661 April 6, 2022 April 28, 2022 0.6185 June 15, 2022 179,781 July 6, 2022 August 4, 2022 0.6185 September 15, 2022 179,790 October 4, 2022 On November 3, 2022, we declared a dividend to our stockholders of record as of December 15, 2022 of $0.6185 per share, payable on January 5, 2023.

Segment Information

Segment Information	9 Months Ended
	Sep. 30, 2022
Segment Reporting [Abstract]
Segment Information	SEGMENT INFORMATION As discussed in Note 11 to Notes to Consolidated Financial Statements included in our Current Report, in the second quarter of 2022, we reassessed the composition of our reportable segments and note that (i) our Entertainment Services offerings are now managed as part of our Global Records and Information Management ("Global RIM") Business segment; (ii) certain commercial costs that were previously managed as part of Corporate and Other Business are now managed as part of our Global RIM Business segment; and (iii) our ALM services, which includes our legacy secure IT disposition business and our business acquired from ITRenew, are now managed as a separate operating segment that is included in Corporate and Other Business. Previously reported segment information has been restated to conform to the current presentation. Our reportable segments as of December 31, 2021 are described in Note 11 to Notes to Consolidated Financial Statements included in our Current Report and are as follows: • Global RIM Business • Global Data Center Business • Corporate and Other Business The operations associated with acquisitions completed during the first nine months of 2022 have been incorporated into our existing reportable segments. An analysis of our business segment information and reconciliation to the accompanying Condensed Consolidated Financial Statements for the three and nine months ended September 30, 2022 and 2021 is as follows: THREE MONTHS ENDED SEPTEMBER 30, NINE MONTHS ENDED SEPTEMBER 30, 2022 2021 2022 2021 Global RIM Business Total Revenues $ 1,091,102 $ 997,843 $ 3,210,469 $ 2,971,085 Adjusted EBITDA 483,862 435,904 1,402,025 1,263,277 Global Data Center Business Total Revenues $ 100,309 $ 88,587 $ 297,384 $ 236,672 Adjusted EBITDA 42,660 35,097 126,944 98,961 Corporate and Other Business Total Revenues $ 95,534 $ 43,718 $ 316,672 $ 124,187 Adjusted EBITDA (57,088) (53,232) (173,835) (158,273) Total Consolidated Total Revenues $ 1,286,945 $ 1,130,148 $ 3,824,525 $ 3,331,944 Adjusted EBITDA 469,434 417,769 1,355,134 1,203,965 Adjusted EBITDA for each segment is defined as net income (loss) before interest expense, net, provision (benefit) for income taxes, depreciation and amortization (inclusive of our share of Adjusted EBITDA from our unconsolidated joint ventures), and excluding certain items we do not believe to be indicative of our core operating results, specifically: EXCLUDED • Acquisition and Integration Costs • Restructuring charges • (Gain) loss on disposal/write-down of property, plant and equipment, net (including real estate) • Other (income) expense, net • Stock-based compensation expense Internally, we use Adjusted EBITDA as the basis for evaluating the performance of, and allocating resources to, our operating segments. A reconciliation of Net Income (Loss) to Adjusted EBITDA on a consolidated basis for the three and nine months ended September 30, 2022 and 2021 is as follows: THREE MONTHS ENDED SEPTEMBER 30, NINE MONTHS ENDED SEPTEMBER 30, 2022 2021 2022 2021 Net Income (Loss) $ 192,931 $ 68,111 $ 436,496 $ 391,264 Add/(Deduct): Interest expense, net 121,767 103,809 351,266 313,451 Provision (benefit) for income taxes 23,934 28,017 52,097 153,073 Depreciation and amortization 175,077 174,818 536,946 507,145 Acquisition and Integration Costs 5,554 1,138 38,093 3,415 Restructuring charges 3,382 50,432 3,382 129,686 (Gain) loss on disposal/write-down of property, plant and equipment, net (including real estate) (14,170) (935) (66,124) (134,321) Other (income) expense, net, excluding our share of losses (gains) from our unconsolidated joint ventures (56,226) (21,517) (48,814) (209,001) Stock-based compensation expense 14,326 12,644 45,923 45,913 Our share of Adjusted EBITDA reconciling items from our unconsolidated joint ventures 2,859 1,252 5,869 3,340 Adjusted EBITDA $ 469,434 $ 417,769 $ 1,355,134 $ 1,203,965 Information as to our revenues by product and service lines by segment for the three and nine months ended September 30, 2022 and 2021 are as follows: THREE MONTHS ENDED SEPTEMBER 30, NINE MONTHS ENDED SEPTEMBER 30, 2022 2021 2022 2021 Global RIM Business Records Management (1) $ 829,357 $ 767,059 $ 2,450,903 $ 2,285,000 Data Management (1) 127,226 130,679 385,276 399,420 Information Destruction (1)(2) 134,519 100,105 374,290 286,665 Data Center (1) — — — — Global Data Center Business Records Management (1) $ — $ — $ — $ — Data Management (1) — — — — Information Destruction (1) — — — — Data Center (1) 100,309 88,587 297,384 236,672 Corporate and Other Business Records Management (1) $ 35,787 $ 30,453 $ 103,826 $ 91,850 Data Management (1) — — — — Information Destruction (1)(3) 59,747 13,265 212,846 32,337 Data Center (1) — — — — Total Consolidated Records Management (1) $ 865,144 $ 797,512 $ 2,554,729 $ 2,376,850 Data Management (1) 127,226 130,679 385,276 399,420 Information Destruction (1)(2)(3) 194,266 113,370 587,136 319,002 Data Center (1) 100,309 88,587 297,384 236,672 (1) Each of these offerings has a component of revenue that is storage rental related and a component that is service revenue, except for information destruction, which does not have a storage rental component. (2) Includes secure shredding services. (3) Includes product revenue from ITRenew.

Related Parties

Related Parties	9 Months Ended
	Sep. 30, 2022
Related Party Transactions [Abstract]
Related Parties	RELATED PARTIESIn October 2020, in connection with the formation of the Frankfurt JV, we entered into agreements whereby we will earn various fees, including (i) special project revenue and (ii) property management and construction and development fees for services we are providing to the Frankfurt JV (the "Frankfurt JV Agreements"). Revenues and expenses associated with the Frankfurt JV Agreements are presented as a component of our Global Data Center Business segment. During the three and nine months ended September 30, 2022, we recognized revenue of approximately $700 and $13,500, respectively, and during the three and nine months ended September 30, 2021, we recognized revenue of approximately $1,200 and $3,100, respectively, associated with the Frankfurt JV Agreements.In March 2019, in connection with the formation of the MakeSpace JV, we entered into a storage and service agreement with the MakeSpace JV to provide certain storage and related services to the MakeSpace JV (the "MakeSpace Agreement"). In February 2022, in connection with the formation of the Clutter JV, we terminated the MakeSpace Agreement and entered into a storage and service agreement with the Clutter JV to provide certain storage and related services to the Clutter JV (the "Clutter Agreement"). Revenues and expenses associated with the MakeSpace Agreement and Clutter Agreement are presented as a component of our Global RIM Business segment. During the three and nine months ended September 30, 2022, we recognized revenue of approximately $6,900 and $21,300, respectively, and during the three and nine months ended September 30, 2021, we recognized revenue of approximately $9,300 and $24,900, respectively, associated with the MakeSpace Agreement and Clutter Agreement.

Restructuring Charges

Restructuring Charges	9 Months Ended
	Sep. 30, 2022
Restructuring and Related Activities [Abstract]
Restructuring Charges	RESTRUCTURING CHARGES PROJECT MATTERHORN In September 2022, we announced a global program designed to accelerate the growth of our business (“Project Matterhorn”). Project Matterhorn investments will focus on transforming our operating model to a global operating model. This program is designed to allow us to shift from a product-based to a solution-based sales approach to better serve our customers’ needs and establish a global operating model that is designed to allow us to optimize our shared services and best practices. We expect to incur approximately $150,000 in costs annually related to Project Matterhorn from 2023 through 2025. Total costs related to Project Matterhorn for the three and nine months ended September 30, 2022 were not material. PROJECT SUMMIT In October 2019, we announced our global program designed to better position us for future growth and achievement of our strategic objectives ("Project Summit") which we completed as of December 31, 2021.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2022
Accounting Policies [Abstract]
Cash and Cash Equivalents	CASH AND CASH EQUIVALENTSCash and cash equivalents include cash on hand and cash invested in highly liquid short-term securities, which have remaining maturities at the date of purchase of less than 90 days. Cash and cash equivalents are carried at cost, which approximates fair value.
Accounts Receivable	ACCOUNTS RECEIVABLE We maintain an allowance for doubtful accounts and a credit memo reserve for estimated losses resulting from the potential inability of our customers to make required payments and potential disputes regarding billing and service issues.
Inventory	INVENTORYInventories are stated at the lower of cost or net realizable value, based on a first-in, first-out methodology. Our inventory primarily consists of information technology-related assets including memory, central processing units, hard drives, adaptors and networking. All of our inventory is considered finished goods. Inventory is included as a component of Prepaid expenses and other in our Condensed Consolidated Balance Sheets.
Leases	LEASES We lease facilities for certain warehouses, data centers and office space. We also have land leases, including those on which certain facilities are located.
Revenues	The costs associated with the initial movement of customer records into physical storage and certain commissions are considered costs to obtain or fulfill customer contracts (collectively, "Contract Fulfillment Costs").DATA CENTER LESSOR CONSIDERATIONS Our Global Data Center Business features storage rental provided to customers at contractually specified rates over a fixed contractual period, which are accounted for in accordance with Accounting Standards Codification ("ASC") No. 842 ("ASC 842"), Leases,
Income Taxes	INCOME TAXESWe provide for income taxes during interim periods based on our estimate of the effective tax rate for the year.
Commitments and Contingencies	We are involved in litigation from time to time in the ordinary course of business, including litigation arising from damage to customer assets in our facilities caused by fires and other natural disasters. While the outcome of such litigation is inherently uncertain, we do not believe any current litigation will have a material adverse effect on our consolidated financial condition, results of operations or cash flows.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	9 Months Ended
	Sep. 30, 2022
Accounting Policies [Abstract]
Schedule of Allowance for Credit Loss	The rollforward of the allowance for doubtful accounts and credit memo reserves for the nine months ended September 30, 2022 is as follows: Balance as of December 31, 2021 $ 62,009 Credit memos charged to revenue 41,722 Allowance for bad debts charged to expense 10,691 Deductions and other (1) (61,727) Balance as of September 30, 2022 $ 52,695 (1) Primarily consists of the issuance of credit memos, the write-off of accounts receivable, allowances associated with businesses acquired and the impact associated with currency translation adjustments.
Schedule of Operating and Financing Lease Right-of-Use Assets and Lease Liabilities	Operating and financing lease right-of-use assets and lease liabilities as of September 30, 2022 and December 31, 2021 are as follows: DESCRIPTION SEPTEMBER 30, 2022 DECEMBER 31, 2021 Assets: Operating lease right-of-use assets $ 2,556,253 $ 2,314,422 Financing lease right-of-use assets, net of accumulated depreciation (1) 250,627 298,049 Liabilities: Current Operating lease liabilities $ 270,311 $ 259,597 Financing lease liabilities (1) 34,622 41,168 Long-term Operating lease liabilities $ 2,405,751 $ 2,171,472 Financing lease liabilities (1) 276,627 315,561 (1) Financing lease right-of-use assets, current financing lease liabilities and long-term financing lease liabilities are included within Property, Plant and Equipment, Net, Current portion of long-term debt and Long-term Debt, net of current portion, respectively, within our Condensed Consolidated Balance Sheets.
Schedule of Lease Costs and Other Information	The components of the lease expense for the three and nine months ended September 30, 2022 and 2021 are as follows: THREE MONTHS ENDED SEPTEMBER 30, NINE MONTHS ENDED SEPTEMBER 30, DESCRIPTION 2022 2021 2022 2021 Operating lease cost (1) $ 145,293 $ 140,551 $ 428,686 $ 408,312 Financing lease cost: Depreciation of financing lease right-of-use assets $ 10,186 $ 14,006 $ 32,218 $ 39,062 Interest expense for financing lease liabilities 4,126 5,055 13,163 14,940 (1) Operating lease cost, the majority of which is included in Cost of sales, includes variable lease costs of $30,730 and $89,647 for the three and nine months ended September 30, 2022, respectively, and $28,835 and $86,422 for the three and nine months ended September 30, 2021, respectively. NINE MONTHS ENDED SEPTEMBER 30, CASH PAID FOR AMOUNTS INCLUDED IN MEASUREMENT OF LEASE LIABILITIES: 2022 2021 Operating cash flows used in operating leases $ 302,442 $ 291,535 Operating cash flows used in financing leases (interest) 13,163 14,940 Financing cash flows used in financing leases 29,254 35,360 NON-CASH ITEMS: Operating lease modifications and reassessments $ 145,133 $ 103,158 New operating leases (including acquisitions and sale-leaseback transactions) 485,673 240,822
Schedule of Changes in the Carrying Value of Goodwill Attributable to Each Reportable Operating Segment	The changes in the carrying value of goodwill attributable to each reportable segment for the nine months ended September 30, 2022 are as follows: GLOBAL RIM BUSINESS GLOBAL DATA CENTER BUSINESS CORPORATE AND OTHER BUSINESS TOTAL CONSOLIDATED Goodwill balance, net of accumulated amortization as of December 31, 2021 (1) $ 3,972,852 $ 426,074 $ 64,605 $ 4,463,531 Tax deductible goodwill acquired during the year — — 762 762 Non-tax deductible goodwill acquired during the period 696 — 585,444 586,140 Fair value and other adjustments (2) (12,101) — 384 (11,717) Currency effects (186,056) (18,287) (3,067) (207,410) Goodwill balance, net of accumulated amortization as of September 30, 2022 $ 3,775,391 $ 407,787 $ 648,128 $ 4,831,306 Accumulated goodwill impairment balance as of September 30, 2022 $ 132,409 $ — $ 26,011 $ 158,420 (1) The balances as of December 31, 2021 have been recast to reflect the segment changes described in our Current Report. (2) This amount primarily represents an adjustment to goodwill as a result of the deconsolidation of certain businesses, as described in Note 2.l.
Schedule of Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis	The assets and liabilities carried at fair value measured on a recurring basis as of September 30, 2022 and December 31, 2021 are as follows: FAIR VALUE MEASUREMENTS AT SEPTEMBER 30, 2022 USING DESCRIPTION TOTAL CARRYING QUOTED PRICES IN SIGNIFICANT OTHER SIGNIFICANT Money Market Funds $ 18,861 $ — $ 18,861 $ — Time Deposits 1,123 — 1,123 — Trading Securities 9,085 9,049 36 — Derivative Assets 85,887 — 85,887 — Deferred Purchase Obligation (as defined in Note 3) 275,100 — — 275,100 FAIR VALUE MEASUREMENTS AT DECEMBER 31, 2021 USING DESCRIPTION TOTAL CARRYING QUOTED PRICES IN SIGNIFICANT OTHER SIGNIFICANT Money Market Funds $ 101,022 $ — $ 101,022 $ — Time Deposits 2,238 — 2,238 — Trading Securities 11,147 11,062 85 — Derivative Assets 11,021 — 11,021 — Derivative Liabilities 8,344 — 8,344 —
Schedule of Changes in Accumulated Other Comprehensive Items, Net	The changes in Accumulated other comprehensive items, net for the three and nine months ended September 30, 2022 and 2021 are as follows: THREE MONTHS ENDED SEPTEMBER 30, 2022 THREE MONTHS ENDED SEPTEMBER 30, 2021 FOREIGN CHANGE IN FAIR VALUE OF TOTAL FOREIGN CHANGE IN FAIR VALUE OF TOTAL Beginning of Period $ (500,629) $ 53,654 $ (446,975) $ (229,790) $ (28,863) $ (258,653) Other comprehensive (loss) income: Foreign currency translation and other adjustments (174,739) — (174,739) (90,465) — (90,465) Change in fair value of derivative instruments — 32,233 32,233 — 14,665 14,665 Total other comprehensive (loss) income (174,739) 32,233 (142,506) (90,465) 14,665 (75,800) End of Period $ (675,368) $ 85,887 $ (589,481) $ (320,255) $ (14,198) $ (334,453) NINE MONTHS ENDED SEPTEMBER 30, 2022 NINE MONTHS ENDED SEPTEMBER 30, 2021 FOREIGN CHANGE IN FAIR VALUE OF TOTAL FOREIGN CHANGE IN FAIR VALUE OF TOTAL Beginning of Period $ (341,024) $ 2,677 $ (338,347) $ (206,190) $ (49,703) $ (255,893) Other comprehensive (loss) income: Foreign currency translation and other adjustments (334,344) — (334,344) (114,065) — (114,065) Change in fair value of derivative instruments — 83,210 83,210 — 35,505 35,505 Total other comprehensive (loss) income (334,344) 83,210 (251,134) (114,065) 35,505 (78,560) End of Period $ (675,368) $ 85,887 $ (589,481) $ (320,255) $ (14,198) $ (334,453)
Schedule of Cost and Accumulated Amortization Associated with Contract Fulfillment Costs	Contract Fulfillment Costs as of September 30, 2022 and December 31, 2021 are as follows: SEPTEMBER 30, 2022 DECEMBER 31, 2021 GROSS ACCUMULATED NET GROSS ACCUMULATED NET Intake Costs asset $ 63,856 $ (40,045) $ 23,811 $ 71,336 $ (42,678) $ 28,658 Commissions asset 124,081 (54,948) 69,133 114,791 (50,553) 64,238
Schedule of Deferred Revenue Liabilities	Deferred revenue liabilities are reflected in our Condensed Consolidated Balance Sheets as follows: DESCRIPTION LOCATION IN BALANCE SHEET SEPTEMBER 30, 2022 DECEMBER 31, 2021 Deferred revenue - Current Deferred revenue $ 282,687 $ 307,470 Deferred revenue - Long-term Other Long-term Liabilities 31,234 33,691
Schedule of Revenue	Storage rental revenue, including revenue associated with power and connectivity, associated with our Global Data Center Business for the three and nine months ended September 30, 2022 and 2021 are as follows: THREE MONTHS ENDED NINE MONTHS ENDED 2022 2021 2022 2021 Storage rental revenue (1) $ 96,328 $ 72,411 $ 273,547 $ 210,805
Schedule of Stock-based Compensation Expense	Stock-based compensation expense for the Employee Stock-Based Awards for the three and nine months ended September 30, 2022 and 2021 is as follows: THREE MONTHS ENDED NINE MONTHS ENDED 2022 2021 2022 2021 Stock-based compensation expense $ 14,326 $ 13,200 $ 45,923 $ 46,852
Schedule of Fair Value of RSU and Earned PUs Vested	The fair value of RSUs and earned PUs that vested during the three and nine months ended September 30, 2022 and 2021 is as follows: THREE MONTHS ENDED NINE MONTHS ENDED 2022 2021 2022 2021 Fair value of RSUs vested $ 4,748 $ 8,425 $ 26,307 $ 31,404 Fair value of earned PUs that vested 13,622 22,030 17,968 27,856
Schedule of Components of Gain/Loss on Sale/Disposal of Property, Plant and Equipment	(Gain) loss on disposal/write-down of property, plant and equipment, net for the three and nine months ended September 30, 2022 and 2021 is as follows: THREE MONTHS ENDED NINE MONTHS ENDED 2022 (1) 2021 2022 (1) 2021 (2) (Gain) Loss on disposal/write-down of property, plant and equipment, net (3) $ (14,170) $ (935) $ (66,124) $ (134,321) (1) The gain for the nine months ended September 30, 2022 primarily consists of gains of approximately $66,000 associated with sale and sale-leaseback transactions, of which (i) approximately $17,000 relates to sale-leaseback transactions of two facilities in the United States and one in Canada during the third quarter of 2022 and (ii) approximately $49,000 relates to sale and sale-leaseback transactions of 11 facilities and parcels of land in the United States during the second quarter of 2022. (2) The gain for the nine months ended September 30, 2021 primarily consists of gains of approximately $127,400 associated with sale-leaseback transactions of five facilities in the United Kingdom during the second quarter of 2021. (3) The gains recognized during both 2022 and 2021 are the result of our program to monetize a small portion of our industrial assets through sale and sale-leaseback transactions. The terms for these leases are consistent with the terms of our lease portfolio, which are disclosed in detail in Note 2.i. to Notes to Consolidated Financial Statements included in our Current Report.
Schedule of Other (Income) Expense, Net	Other (income) expense, net for the three and nine months ended September 30, 2022 and 2021 consists of the following: THREE MONTHS ENDED SEPTEMBER 30, NINE MONTHS ENDED DESCRIPTION 2022 2021 2022 2021 Foreign currency transaction (gains) losses, net (1) $ (58,519) $ (23,200) $ (126,759) $ (16,157) Debt extinguishment expense — — 671 — Other, net (2)(3) 5,649 4,699 87,902 (183,861) Other (Income) Expense, Net $ (52,870) $ (18,501) $ (38,186) $ (200,018) (1) We recognized net foreign currency transaction gains of $58,519 and $126,759 for the three and nine months ended September 30, 2022, respectively. These gains primarily consist of the impact of changes in the exchange rate of the Euro and the British pound sterling against the United States dollar on our intercompany balances with and between certain of our subsidiaries. (2) On March 24, 2022, as a result of our loss of control, we deconsolidated the businesses included in the acquisition of OSG Records Management (Europe) Limited, excluding Ukraine. We recognized a loss of approximately $105,800 associated with the deconsolidation to Other expense (income), net in the first quarter of 2022 representing the difference between the net asset value prior to the deconsolidation and the subsequent remeasurement of the retained investment to a fair value of zero. We have concluded that the deconsolidation does not meet the criteria to be reported as discontinued operations in our consolidated financial statements, as it does not represent a strategic shift that will have a major effect on our operations and financial results. The loss was partially offset by a gain recorded in the first quarter of 2022 of approximately $35,800 associated with the Clutter Transaction (as defined in Note 4).
Schedule of Income Taxes	Our effective tax rates for the three and nine months ended September 30, 2022 and 2021 are as follows: THREE MONTHS ENDED SEPTEMBER 30, NINE MONTHS ENDED 2022 (1) 2021 (2) 2022 (1) 2021 (2) Effective Tax Rate 11.0 % 29.1 % 10.7 % 28.1 % (1) The primary reconciling items between the federal statutory tax rate of 21.0% and our overall effective tax rate for the three and nine months ended September 30, 2022 were the benefits derived from the dividends paid deduction and the differences in the tax rates to which our foreign earnings are subject. In addition, there were gains and losses recorded in Other (income) expense, net and Gain (loss) on disposal/write-down of property, plant and equipment, net, during the period for which there was an insignificant tax impact. During the first quarter of 2022, there was also a release of valuation allowances on deferred tax assets of our U.S. taxable REIT subsidiaries ("TRS") of approximately $9,900 as a result of the ITRenew Transaction. (2) The primary reconciling items between the federal statutory tax rate of 21.0% and our overall effective tax rate for the three and nine months ended September 30, 2021 were the impacts of differences in the tax rates at which our foreign earnings are subject, partially offset by the benefits derived from the dividends paid deduction. The costs associated with Project Summit (as defined in Note 11) are more heavily weighted to our United States qualified REIT subsidiaries ("QRSs"), and, therefore, provide no tax benefit. Additionally, the nine months ended September 30, 2021 reflects a discrete tax expense of approximately $12,000 primarily resulting from a tax law change in the United Kingdom.
Schedule of Basic and Diluted Net Income (Loss) per Share Attributable to the Entity	The calculation of basic and diluted income (loss) per share for the three and nine months ended September 30, 2022 and 2021 are as follows: THREE MONTHS ENDED SEPTEMBER 30, NINE MONTHS ENDED 2022 2021 2022 2021 Net Income (Loss) $ 192,931 $ 68,111 $ 436,496 $ 391,264 Less: Net Income (Loss) Attributable to Noncontrolling Interests 767 428 1,952 2,693 Net Income (Loss) Attributable to Iron Mountain Incorporated (utilized in numerator of Earnings Per Share calculation) $ 192,164 $ 67,683 $ 434,544 $ 388,571 Weighted-average shares—basic 290,937,000 289,762,000 290,673,000 289,255,000 Effect of dilutive potential stock options 1,133,952 869,600 1,126,280 522,642 Effect of dilutive potential RSUs and PUs 480,919 850,655 494,956 918,954 Weighted-average shares—diluted 292,551,871 291,482,255 292,294,236 290,696,596 Net Income (Loss) Per Share Attributable to Iron Mountain Incorporated: Basic $ 0.66 $ 0.23 $ 1.49 $ 1.34 Diluted $ 0.66 $ 0.23 $ 1.49 $ 1.34 Antidilutive stock options, RSUs and PUs, excluded from the calculation 220,421 351,673 403,362 1,813,880

Acquisitions (Tables)

Acquisitions (Tables)	9 Months Ended
	Sep. 30, 2022
Business Combination and Asset Acquisition [Abstract]
Business Acquisition, Pro Forma Information	These operating expenditures have been reflected within the results of operations in the Pro Forma Financial Information as if they were incurred on January 1, 2021. THREE MONTHS ENDED SEPTEMBER 30, NINE MONTHS ENDED 2022 2021 2022 2021 Total Revenues $ 1,286,945 $ 1,234,386 $ 3,842,499 $ 3,675,396 Income from Continuing Operations $ 192,931 $ 70,491 $ 436,627 $ 341,096
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	A summary of the cumulative consideration paid and the preliminary allocation of the purchase price paid for all of our 2022 acquisitions through September 30, 2022 is as follows: NINE MONTHS ENDED SEPTEMBER 30, 2022 Cash Paid (gross of cash acquired) (1) $ 756,003 Deferred Purchase Obligation, Purchase Price Holdbacks and Other (2) 279,734 Total Consideration 1,035,737 Fair Value of Identifiable Assets Acquired and Liabilities Assumed: Cash 31,571 Accounts Receivable, Prepaid Expenses and Other Assets 73,351 Property, Plant and Equipment 7,893 Customer and Supplier Relationship Intangible Assets (3) 491,422 Other Intangible Assets (3) 47,300 Operating Lease Right-of-Use Assets 32,680 Accounts Payable, Accrued Expenses and Other Liabilities (60,683) Operating Lease Liabilities (32,680) Deferred Income Taxes (142,019) Total Fair Value of Identifiable Net Assets Acquired 448,835 Goodwill Initially Recorded (4) $ 586,902 (1) Cash paid for acquisitions, net of cash acquired in our Condensed Consolidated Statement of Cash Flows includes contingent and other payments received of $219 for the nine months ended September 30, 2022 related to acquisitions made in the years prior to 2022. (2) Deferred purchase obligation, purchase price holdbacks and other includes $275,100 related to the fair value estimate of the Deferred Purchase Obligation for the Remaining Interests and approximately $4,600 of deferred purchase obligation, purchase price holdbacks and other associated with our other business and asset acquisitions completed in 2022. (3) The preliminary weighted average life of the intangible assets acquired in the ITRenew Transaction is approximately 11 years. Intangible assets are included as a component of Other assets, net in our Condensed Consolidated Balance Sheets. (4) Goodwill is primarily attributable to the assembled workforce, expanded market opportunities and costs and other operating synergies anticipated upon the integration of the operations of us and the acquired businesses.

Investments (Tables)

Investments (Tables)	9 Months Ended
	Sep. 30, 2022
Investments, All Other Investments [Abstract]
Schedule of Equity Method Investments	The carrying values and equity interests in our joint ventures at September 30, 2022 and December 31, 2021 are as follows: SEPTEMBER 30, 2022 DECEMBER 31, 2021 CARRYING VALUE EQUITY INTEREST CARRYING VALUE EQUITY INTEREST Web Werks JV $ 97,877 55.40 % $ 51,140 38.50 % Joint venture with AGC Equity Partners (the "Frankfurt JV") 27,004 20.00 % 26,167 20.00 % MakeSpace JV — — % 30,154 49.99 % Clutter JV 57,113 26.73 % — — %

Derivative Instruments and He_2

Derivative Instruments and Hedging Activities (Tables)	9 Months Ended
	Sep. 30, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments	Assets (liabilities) recognized in our Condensed Consolidated Balance Sheets at September 30, 2022 and December 31, 2021, by derivative instrument, are as follows: DERIVATIVE INSTRUMENTS (1) SEPTEMBER 30, 2022 DECEMBER 31, 2021 Cash Flow Hedges (2) March 2024 Interest Rate Swap Agreements $ 12,879 $ (7,680) Net Investment Hedges (3) August 2023 Cross-Currency Swap Agreements 12,938 (664) February 2026 Cross-Currency Swap Agreements 60,070 11,021 (1) Our derivative assets are included as a component of (i) Prepaid expenses and other or (ii) Other within Other assets, net in our Condensed Consolidated Balance Sheets and our derivative liabilities are included as a component of (i) Accrued expenses and other current liabilities or (ii) Other long-term liabilities in our Condensed Consolidated Balance Sheets. As of September 30, 2022, $12,938 is included within Prepaid expenses and other and $72,949 is included within Other assets. As of December 31, 2021, $11,021 is included within Other assets, $2,082 is included within Accrued expense and other current liabilities and $6,262 is included within Other long-term liabilities. (2) As of September 30, 2022, cumulative net gains of $12,879 are recorded within Accumulated other comprehensive items, net associated with these interest rate swap agreements. (3) As of September 30, 2022, cumulative net gains of $73,008 are recorded within Accumulated other comprehensive items, net associated with these cross-currency swap agreements.
Schedule of Gains(Losses) for Derivative Instruments	Unrealized gains (losses) recognized during the three and nine months ended September 30, 2022 and 2021, by derivative instrument, are as follows: THREE MONTHS ENDED SEPTEMBER 30, NINE MONTHS ENDED SEPTEMBER 30, DERIVATIVE INSTRUMENTS (1) 2022 2021 2022 2021 Cash Flow Hedges March 2024 Interest Rate Swap Agreements $ 5,157 $ 1,950 $ 20,559 $ 7,946 Net Investment Hedges August 2023 Cross-Currency Swap Agreements 6,771 2,655 13,602 5,933 February 2026 Cross-Currency Swap Agreements 20,305 10,060 49,049 21,626 (1) These amounts are recognized as unrealized gains (losses), a component of Accumulated other comprehensive items, net.

Debt (Tables)

Debt (Tables)	9 Months Ended
	Sep. 30, 2022
Debt Disclosure [Abstract]
Schedule of Carrying Amount and Fair Value of Long-Term Debt Instruments	Long-term debt is as follows: SEPTEMBER 30, 2022 DECEMBER 31, 2021 DEBT (INCLUSIVE OF DISCOUNT) UNAMORTIZED DEFERRED FINANCING COSTS CARRYING AMOUNT FAIR VALUE DEBT (INCLUSIVE OF DISCOUNT) UNAMORTIZED DEFERRED FINANCING COSTS CARRYING AMOUNT FAIR VALUE Revolving Credit Facility $ 890,000 $ (7,899) $ 882,101 $ 890,000 $ — $ (5,174) $ (5,174) $ — Term Loan A 243,750 — 243,750 243,750 203,125 — 203,125 203,125 Term Loan B 667,766 (4,059) 663,707 668,500 672,847 (4,995) 667,852 675,500 Australian Dollar Term Loan 193,140 (464) 192,676 193,140 223,182 (656) 222,526 223,530 UK Bilateral Revolving Credit Facility 155,887 (175) 155,712 155,887 189,168 (709) 188,459 189,168 3 7 / 8 % GBP Senior Notes due 2025 (the "GBP Notes") 445,392 (2,593) 442,799 392,373 540,481 (3,912) 536,569 542,508 4 7 / 8 % Senior Notes due 2027 (the "4 7 / 8 % Notes due 2027") (1) 1,000,000 (7,110) 992,890 892,500 1,000,000 (8,176) 991,824 1,030,000 5 1 / 4 % Senior Notes due 2028 (the "5 1 / 4 % Notes due 2028") (1) 825,000 (6,495) 818,505 719,813 825,000 (7,380) 817,620 862,125 5% Senior Notes due 2028 (the "5% Notes due 2028") (1) 500,000 (4,220) 495,780 428,750 500,000 (4,763) 495,237 513,750 4 7 / 8 % Senior Notes due 2029 (the "4 7 / 8 % Notes due 2029") (1) 1,000,000 (10,126) 989,874 815,000 1,000,000 (11,211) 988,789 1,022,500 5 1 / 4 % Senior Notes due 2030 (the "5 1 / 4 % Notes due 2030") (1) 1,300,000 (11,783) 1,288,217 1,072,500 1,300,000 (12,911) 1,287,089 1,355,250 4 1 / 2 % Senior Notes due 2031 (the "4 1 / 2 % Notes") (1) 1,100,000 (10,471) 1,089,529 847,000 1,100,000 (11,404) 1,088,596 1,094,500 5% Senior Notes due 2032 (the "5% Notes due 2032") 750,000 (12,827) 737,173 579,375 750,000 (13,782) 736,218 767,813 5 5 / 8 % Senior Notes due 2032 (the "5 5 / 8 % Notes") (1) 600,000 (5,711) 594,289 477,000 600,000 (6,147) 593,853 637,500 Real Estate Mortgages, Financing Lease Liabilities and Other 407,646 (643) 407,003 407,646 460,648 (840) 459,808 460,648 Accounts Receivable Securitization Program 316,700 (584) 316,116 316,700 — (450) (450) — Total Long-term Debt 10,395,281 (85,160) 10,310,121 9,364,451 (92,510) 9,271,941 Less Current Portion (81,275) — (81,275) (310,084) 656 (309,428) Long-term Debt, Net of Current Portion $ 10,314,006 $ (85,160) $ 10,228,846 $ 9,054,367 $ (91,854) $ 8,962,513 (1) Collectively, the "Parent Notes".
Schedule of Net Cash Position in Cash Pool Agreements	The approximate amount of the net cash position for our cash pools and the approximate amount of the gross position and outstanding debit balances for each of these pools as of September 30, 2022 and December 31, 2021 are as follows: SEPTEMBER 30, 2022 DECEMBER 31, 2021 GROSS CASH POSITION OUTSTANDING DEBIT BALANCES NET CASH POSITION GROSS CASH POSITION OUTSTANDING DEBIT BALANCES NET CASH POSITION BMG QRS Cash Pool $ 590,127 $ (588,633) $ 1,494 $ 552,900 $ (552,100) $ 800 BMG TRS Cash Pool 539,557 (538,498) 1,059 606,000 (603,900) 2,100 JPM QRS APAC Cash Pool 23,561 (23,394) 167 9,400 (9,200) 200 JPM TRS APAC Cash Pool 22,272 (21,899) 373 12,000 (9,900) 2,100 JPM QRS EMEA Cash Pool 6,030 (5,718) 312 — — — JPM TRS EMEA Cash Pool 2,104 (2,044) 60 — — —

Stockholders' Equity Matters (T

Stockholders' Equity Matters (Tables)	9 Months Ended
	Sep. 30, 2022
Equity [Abstract]
Schedule of Dividend Declared and Payments	In fiscal year 2021 and the nine months ended September 30, 2022, our board of directors declared the following dividends: DECLARATION DATE DIVIDEND RECORD DATE TOTAL PAYMENT DATE February 24, 2021 $ 0.6185 March 15, 2021 $ 178,569 April 6, 2021 May 6, 2021 0.6185 June 15, 2021 179,026 July 6, 2021 August 5, 2021 0.6185 September 15, 2021 179,080 October 6, 2021 November 4, 2021 0.6185 December 15, 2021 179,132 January 6, 2022 February 24, 2022 0.6185 March 15, 2022 179,661 April 6, 2022 April 28, 2022 0.6185 June 15, 2022 179,781 July 6, 2022 August 4, 2022 0.6185 September 15, 2022 179,790 October 4, 2022

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
	Sep. 30, 2022
Segment Reporting [Abstract]
Schedule of Analysis of Business Segment Information	An analysis of our business segment information and reconciliation to the accompanying Condensed Consolidated Financial Statements for the three and nine months ended September 30, 2022 and 2021 is as follows: THREE MONTHS ENDED SEPTEMBER 30, NINE MONTHS ENDED SEPTEMBER 30, 2022 2021 2022 2021 Global RIM Business Total Revenues $ 1,091,102 $ 997,843 $ 3,210,469 $ 2,971,085 Adjusted EBITDA 483,862 435,904 1,402,025 1,263,277 Global Data Center Business Total Revenues $ 100,309 $ 88,587 $ 297,384 $ 236,672 Adjusted EBITDA 42,660 35,097 126,944 98,961 Corporate and Other Business Total Revenues $ 95,534 $ 43,718 $ 316,672 $ 124,187 Adjusted EBITDA (57,088) (53,232) (173,835) (158,273) Total Consolidated Total Revenues $ 1,286,945 $ 1,130,148 $ 3,824,525 $ 3,331,944 Adjusted EBITDA 469,434 417,769 1,355,134 1,203,965
Schedule of Reconciliation of Net Income (Loss) to Adjusted EBITDA	A reconciliation of Net Income (Loss) to Adjusted EBITDA on a consolidated basis for the three and nine months ended September 30, 2022 and 2021 is as follows: THREE MONTHS ENDED SEPTEMBER 30, NINE MONTHS ENDED SEPTEMBER 30, 2022 2021 2022 2021 Net Income (Loss) $ 192,931 $ 68,111 $ 436,496 $ 391,264 Add/(Deduct): Interest expense, net 121,767 103,809 351,266 313,451 Provision (benefit) for income taxes 23,934 28,017 52,097 153,073 Depreciation and amortization 175,077 174,818 536,946 507,145 Acquisition and Integration Costs 5,554 1,138 38,093 3,415 Restructuring charges 3,382 50,432 3,382 129,686 (Gain) loss on disposal/write-down of property, plant and equipment, net (including real estate) (14,170) (935) (66,124) (134,321) Other (income) expense, net, excluding our share of losses (gains) from our unconsolidated joint ventures (56,226) (21,517) (48,814) (209,001) Stock-based compensation expense 14,326 12,644 45,923 45,913 Our share of Adjusted EBITDA reconciling items from our unconsolidated joint ventures 2,859 1,252 5,869 3,340 Adjusted EBITDA $ 469,434 $ 417,769 $ 1,355,134 $ 1,203,965
Schedule of Revenues by Product and Service Lines by Segment	Information as to our revenues by product and service lines by segment for the three and nine months ended September 30, 2022 and 2021 are as follows: THREE MONTHS ENDED SEPTEMBER 30, NINE MONTHS ENDED SEPTEMBER 30, 2022 2021 2022 2021 Global RIM Business Records Management (1) $ 829,357 $ 767,059 $ 2,450,903 $ 2,285,000 Data Management (1) 127,226 130,679 385,276 399,420 Information Destruction (1)(2) 134,519 100,105 374,290 286,665 Data Center (1) — — — — Global Data Center Business Records Management (1) $ — $ — $ — $ — Data Management (1) — — — — Information Destruction (1) — — — — Data Center (1) 100,309 88,587 297,384 236,672 Corporate and Other Business Records Management (1) $ 35,787 $ 30,453 $ 103,826 $ 91,850 Data Management (1) — — — — Information Destruction (1)(3) 59,747 13,265 212,846 32,337 Data Center (1) — — — — Total Consolidated Records Management (1) $ 865,144 $ 797,512 $ 2,554,729 $ 2,376,850 Data Management (1) 127,226 130,679 385,276 399,420 Information Destruction (1)(2)(3) 194,266 113,370 587,136 319,002 Data Center (1) 100,309 88,587 297,384 236,672 (1) Each of these offerings has a component of revenue that is storage rental related and a component that is service revenue, except for information destruction, which does not have a storage rental component. (2) Includes secure shredding services. (3) Includes product revenue from ITRenew.

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Allowance for Doubtful Accounts and Credit Memo Reserves (Details) - Allowance for doubtful accounts $ in Thousands	9 Months Ended
	Sep. 30, 2022 USD ($)
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance	$ 62,009
Credit memos charged to revenue	41,722
Allowance for bad debts charged to expense	10,691
Deductions and other	(61,727)
Ending balance	$ 52,695

Summary of Significant Accoun_5

Summary of Significant Accounting Policies- Inventory (Details) - USD ($)	Sep. 30, 2022	Dec. 31, 2021
Accounting Policies [Abstract]
Inventory	$ 14,565,000	$ 0

Summary of Significant Accoun_6

Summary of Significant Accounting Policies - Supplemental Balance Sheet (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Accounting Policies [Abstract]
Operating lease right-of-use assets	$ 2,556,253	$ 2,314,422
Financing lease right-of-use assets, net of accumulated depreciation	250,627	298,049
Current
Operating lease liabilities	270,311	259,597
Finance lease liabilities	34,622	41,168
Long-term
Operating lease liabilities	2,405,751	2,171,472
Finance lease liabilities	$ 276,627	$ 315,561
Finance lease, right-of-use asset, statement of financial position [Extensible List]	Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization	Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization
Operating lease, liability, current, statement of financial position [Extensible List]	Accrued expenses and other current liabilities (includes current portion of operating lease liabilities)	Accrued expenses and other current liabilities (includes current portion of operating lease liabilities)
Finance lease, liability, current, statement of financial position [Extensible List]	Current portion of long-term debt	Current portion of long-term debt
Finance lease, liability, noncurrent, statement of financial position [Extensible List]	Long-term Debt, net of current portion	Long-term Debt, net of current portion

Summary of Significant Accoun_7

Summary of Significant Accounting Policies - Leases Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Accounting Policies [Abstract]
Operating lease cost	$ 145,293	$ 140,551	$ 428,686	$ 408,312
Depreciation of financing lease right-of-use assets	10,186	14,006	32,218	39,062
Interest expense for financing lease liabilities	4,126	5,055		14,940
Variable lease costs	$ 30,730	$ 28,835	$ 89,647	$ 86,422

Summary of Significant Accoun_8

Summary of Significant Accounting Policies - Supplemental Cash Flows (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Accounting Policies [Abstract]
Operating cash flows used in operating leases	$ 302,442	$ 291,535
Operating cash flows used in financing leases (interest)	13,163	14,940
Financing cash flows used in financing leases	29,254	35,360
Operating lease modifications and reassessments	145,133	103,158
New operating leases (including acquisitions and sale-leaseback transactions)	$ 485,673	$ 240,822

Summary of Significant Accoun_9

Summary of Significant Accounting Policies - Schedule of Changes in Carrying Value of Goodwill (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2022 USD ($)
Gross amount of goodwill [Roll Forward]
Goodwill beginning balance	$ 4,463,531
Tax deductible goodwill acquired during the year	762
Non-tax deductible goodwill acquired during the period	586,140
Fair value and other adjustments	(11,717)
Currency effects	(207,410)
Goodwill ending balance	4,831,306
Accumulated goodwill impairment	158,420
GLOBAL RIM BUSINESS
Gross amount of goodwill [Roll Forward]
Goodwill beginning balance	3,972,852
Tax deductible goodwill acquired during the year	0
Non-tax deductible goodwill acquired during the period	696
Fair value and other adjustments	(12,101)
Currency effects	(186,056)
Goodwill ending balance	3,775,391
Accumulated goodwill impairment	132,409
GLOBAL DATA CENTER BUSINESS
Gross amount of goodwill [Roll Forward]
Goodwill beginning balance	426,074
Tax deductible goodwill acquired during the year	0
Non-tax deductible goodwill acquired during the period	0
Fair value and other adjustments	0
Currency effects	(18,287)
Goodwill ending balance	407,787
Accumulated goodwill impairment	0
CORPORATE AND OTHER BUSINESS
Gross amount of goodwill [Roll Forward]
Goodwill beginning balance	64,605
Tax deductible goodwill acquired during the year	762
Non-tax deductible goodwill acquired during the period	585,444
Fair value and other adjustments	384
Currency effects	(3,067)
Goodwill ending balance	648,128
Accumulated goodwill impairment	$ 26,011

Summary of Significant Accou_10

Summary of Significant Accounting Policies - Fair Value Measurements (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis [Line Items]
Derivative Assets		$ 11,021
Fair Value Measured on Recurring Basis | QUOTED PRICES IN ACTIVE MARKETS (LEVEL 1)
Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis [Line Items]
Trading Securities	$ 9,049	11,062
Derivative Assets	0	0
Derivative Liabilities		0
Deferred purchase obligation	0
Fair Value Measured on Recurring Basis | SIGNIFICANT OTHER OBSERVABLE INPUTS (LEVEL 2)
Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis [Line Items]
Trading Securities	36	85
Derivative Assets	85,887	11,021
Derivative Liabilities		8,344
Deferred purchase obligation	0
Fair Value Measured on Recurring Basis | SIGNIFICANT UNOBSERVABLE INPUTS (LEVEL 3)
Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis [Line Items]
Trading Securities	0	0
Derivative Assets	0	0
Derivative Liabilities		0
Deferred purchase obligation	275,100
Estimate of Fair Value Measurement | Fair Value Measured on Recurring Basis
Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis [Line Items]
Trading Securities	9,085	11,147
Derivative Assets	85,887	11,021
Derivative Liabilities		8,344
Deferred purchase obligation	275,100
Money Market Funds | Fair Value Measured on Recurring Basis | QUOTED PRICES IN ACTIVE MARKETS (LEVEL 1)
Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis [Line Items]
Cash and cash equivalents	0	0
Money Market Funds | Fair Value Measured on Recurring Basis | SIGNIFICANT OTHER OBSERVABLE INPUTS (LEVEL 2)
Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis [Line Items]
Cash and cash equivalents	18,861	101,022
Money Market Funds | Fair Value Measured on Recurring Basis | SIGNIFICANT UNOBSERVABLE INPUTS (LEVEL 3)
Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis [Line Items]
Cash and cash equivalents	0	0
Money Market Funds | Estimate of Fair Value Measurement | Fair Value Measured on Recurring Basis
Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis [Line Items]
Cash and cash equivalents	18,861	101,022
Time Deposits | Fair Value Measured on Recurring Basis | QUOTED PRICES IN ACTIVE MARKETS (LEVEL 1)
Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis [Line Items]
Cash and cash equivalents	0	0
Time Deposits | Fair Value Measured on Recurring Basis | SIGNIFICANT OTHER OBSERVABLE INPUTS (LEVEL 2)
Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis [Line Items]
Cash and cash equivalents	1,123	2,238
Time Deposits | Fair Value Measured on Recurring Basis | SIGNIFICANT UNOBSERVABLE INPUTS (LEVEL 3)
Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis [Line Items]
Cash and cash equivalents	0	0
Time Deposits | Estimate of Fair Value Measurement | Fair Value Measured on Recurring Basis
Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis [Line Items]
Cash and cash equivalents	$ 1,123	$ 2,238

Summary of Significant Accou_11

Summary of Significant Accounting Policies - Accumulated Other Comprehensive Income and Other Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
AOCI Rollforward
Beginning of Period	$ 651,775	$ 1,147,742	$ 857,068	$ 1,136,729
Other comprehensive (loss) income:
Foreign currency translation and other adjustments	(174,739)	(90,465)	(334,344)	(114,065)
Change in fair value of derivative instruments	32,233	14,665	83,210	35,505
Total other comprehensive (loss) income	(142,506)	(75,800)	(251,134)	(78,560)
End of period	533,839	975,146	533,839	975,146
FOREIGN CURRENCY TRANSLATION AND OTHER ADJUSTMENTS
AOCI Rollforward
Beginning of Period	(500,629)	(229,790)	(341,024)	(206,190)
Other comprehensive (loss) income:
Foreign currency translation and other adjustments	(174,739)	(90,465)	(334,344)	(114,065)
Change in fair value of derivative instruments	0	0	0	0
Total other comprehensive (loss) income	(174,739)	(90,465)	(334,344)	(114,065)
End of period	(675,368)	(320,255)	(675,368)	(320,255)
CHANGE IN FAIR VALUE OF DERIVATIVE INSTRUMENTS
AOCI Rollforward
Beginning of Period	53,654	(28,863)	2,677	(49,703)
Other comprehensive (loss) income:
Foreign currency translation and other adjustments	0	0	0	0
Change in fair value of derivative instruments	32,233	14,665	83,210	35,505
Total other comprehensive (loss) income	32,233	14,665	83,210	35,505
End of period	85,887	(14,198)	85,887	(14,198)
TOTAL
AOCI Rollforward
Beginning of Period	(446,975)	(258,653)	(338,347)	(255,893)
Other comprehensive (loss) income:
End of period	$ (589,481)	$ (334,453)	$ (589,481)	$ (334,453)

Summary of Significant Accou_12

Summary of Significant Accounting Policies - Contract Fulfillment Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Intake Costs asset
Contract With Customer, Asset And Liabilities [Line Items]
GROSS CARRYING AMOUNT	$ 63,856	$ 71,336
ACCUMULATED AMORTIZATION	(40,045)	(42,678)
NET CARRYING AMOUNT	23,811	28,658
Commissions asset
Contract With Customer, Asset And Liabilities [Line Items]
GROSS CARRYING AMOUNT	124,081	114,791
ACCUMULATED AMORTIZATION	(54,948)	(50,553)
NET CARRYING AMOUNT	$ 69,133	$ 64,238

Summary of Significant Accou_13

Summary of Significant Accounting Policies - Summary of Deferred Revenue Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Accounting Policies [Abstract]
Deferred revenue - Current	$ 282,687	$ 307,470
Deferred revenue - Long-term	$ 31,234	$ 33,691

Summary of Significant Accou_14

Summary of Significant Accounting Policies - Storage Rental (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Lessor, Lease, Description [Line Items]
Storage rental	$ 760,370	$ 718,614	$ 2,264,566	$ 2,144,942
GLOBAL DATA CENTER BUSINESS
Lessor, Lease, Description [Line Items]
Storage rental	96,328	72,411	273,547	210,805
Storage Rental, Power and Connectivity | GLOBAL DATA CENTER BUSINESS
Lessor, Lease, Description [Line Items]
Storage rental	$ 34,621	$ 14,639	$ 93,652	$ 42,333

Summary of Significant Accou_15

Summary of Significant Accounting Policies - Stock-Based Compensation Narrative (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($) yr	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) yr	Sep. 30, 2021 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Age of recipient | yr	55		55
Service period			5 years
Unrecognized compensation cost	$ 52,664		$ 52,664
Stock-based Compensation Expense [Abstract]
Stock-based compensation expense	14,326	$ 13,200	45,923	$ 46,852
Restricted Stock Units
Summary of Option Activity
Total fair value of shares or units vested	4,748	8,425	26,307	31,404
Performance units
Summary of Option Activity
Total fair value of shares or units vested	$ 13,622	$ 22,030	$ 17,968	$ 27,856
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Age of recipient | yr	65		65

Summary of Significant Accou_16

Summary of Significant Accounting Policies - Acquisition and Integration costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Accounting Policies [Abstract]
Acquisition and Integration Costs	$ 5,554	$ 1,138	$ 38,093	$ 3,415

Summary of Significant Accou_17

Summary of Significant Accounting Policies - (Gain) Loss on Disposal/Write-Down of Property, Plant and Equipment, Net (Details) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2022 USD ($) facility	Jun. 30, 2022 USD ($) facility	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)
Accumulated Other Comprehensive Income (Loss) [Line Items]
(Gain) loss on disposal/write-down of property, plant and equipment, net | $	$ (14,170)		$ (935)	$ (66,124)	$ (134,321)
Facilities And Parcels Of Land In the United States
Accumulated Other Comprehensive Income (Loss) [Line Items]
Sale and sale-leaseback transactions | $	$ 17,000	$ 49,000		$ 66,000
Number of sale lease back properties		11
Facilities In United States
Accumulated Other Comprehensive Income (Loss) [Line Items]
Number of sale lease back properties	2
Facilities in Canada
Accumulated Other Comprehensive Income (Loss) [Line Items]
Number of sale lease back properties	1
Facilities In The United Kingdom
Accumulated Other Comprehensive Income (Loss) [Line Items]
Sale and sale-leaseback transactions | $					$ 127,400
Number of sale lease back properties	5

Summary of Significant Accou_18

Summary of Significant Accounting Policies - Other (Income) Expense, Net (Details) € in Thousands, $ in Thousands		3 Months Ended				9 Months Ended
	May 18, 2021 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2022 EUR (€)	Mar. 31, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2022 EUR (€)	Sep. 30, 2021 USD ($)
Accounting Policies [Abstract]
Foreign currency transaction (gains) losses, net		$ (58,519)	€ (58,519)		$ (23,200)	$ (126,759)	€ (126,759)	$ (16,157)
Debt extinguishment expense		0			0	671		0
Other, net		5,649			4,699	87,902		(183,861)
Other (Income) Expense, Net		(52,870)			(18,501)	(38,186)		(200,018)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Foreign currency transaction gain		$ 58,519	€ 58,519		$ 23,200	126,759	€ 126,759	16,157
Gain (loss) on disposal						(105,825)		0
Gain on IPM divestment	$ 20,300					$ 0		180,569
IPM Divestment
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on IPM divestment								$ 180,600
OSG Records Management (Europe) Limited
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on disposal				$ (105,800)
Clutter JV
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on disposal				$ 35,800

Summary of Significant Accou_19

Summary of Significant Accounting Policies - Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Mar. 31, 2022
Accounting Policies [Abstract]
Effective Tax Rate	11%	29.10%	10.70%	28.10%
Federal statutory tax rate	21%	21%	21%	21%
Deferred tax assets					$ 9,900
Expense related to change in enacted tax law				$ 12

Summary of Significant Accou_20

Summary of Significant Accounting Policies - Income (Loss) Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income (Loss) Per Share-Basic and Diluted
Net Income (Loss)	$ 192,931	$ 68,111	$ 436,496	$ 391,264
Less: Net Income (Loss) Attributable to Noncontrolling Interests	767	428	1,952	2,693
Net Income (Loss) Attributable to Iron Mountain Incorporated (utilized in numerator of Earnings Per Share calculation)	$ 192,164	$ 67,683	$ 434,544	$ 388,571
Weighted-average shares—basic (in shares)	290,937,000	289,762,000	290,673,000	289,255,000
Effect of dilutive potential stock options (in shares)	1,133,952	869,600	1,126,280	522,642
Effect of dilutive potential restricted stock, RSUs and PUs (in shares)	480,919	850,655	494,956	918,954
Weighted-average shares—diluted (in shares)	292,551,871	291,482,255	292,294,236	290,696,596
Basic (in dollars per share)	$ 0.66	$ 0.23	$ 1.49	$ 1.34
Diluted (in dollars per share)	$ 0.66	$ 0.23	$ 1.49	$ 1.34
Antidilutive stock options, RSUs and PUs, excluded from the calculation (in shares)	220,421	351,673	403,362	1,813,880

Acquisitions - Additional Infor

Acquisitions - Additional Information (Details) - USD ($) $ in Thousands		9 Months Ended
	Jan. 25, 2022	Sep. 30, 2022	Sep. 30, 2021	Jan. 25, 2025	Jan. 25, 2024
Business Acquisition [Line Items]
Cash paid for acquisitions, net of cash acquired		$ 724,213	$ 203,752
ITRenew
Business Acquisition [Line Items]
Ownership acquired	80%
Total Consideration	$ 725
Cash paid (gross of cash acquired)	748,846
Net cash acquired	30,720
Cash paid for acquisitions, net of cash acquired	$ 718,126
Possible subsequent percentage acquired	20%
Deferred purchase obligation	$ 275,100
Consolidation percentage	100%
Operating expenditures		59,370
ITRenew | Minimum
Business Acquisition [Line Items]
Value of possible subsequent acquisition	$ 200
ITRenew | Maximum
Business Acquisition [Line Items]
Value of possible subsequent acquisition	531,000
ITRenew | Second Anniversary | Forecast
Business Acquisition [Line Items]
Possible subsequent percentage acquired					16%
ITRenew | Third Anniversary | Forecast
Business Acquisition [Line Items]
Possible subsequent percentage acquired				4%
Other 2022 Acquisition
Business Acquisition [Line Items]
Total Consideration	$ 11,000
Deferred purchase obligation, purchase price holdbacks and other		$ 4,600

Acquisitions - Pro Forma Financ

Acquisitions - Pro Forma Financial Information (Details) - ITRenew - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Total Revenues	$ 1,286,945	$ 1,234,386	$ 3,842,499	$ 3,675,396
Income from Continuing Operations	$ 192,931	$ 70,491	$ 436,627	$ 341,096

Acquisitions - Schedule of Purc

Acquisitions - Schedule of Purchase Price Allocation (Details) - USD ($) $ in Thousands		9 Months Ended
	Jan. 25, 2022	Sep. 30, 2022	Dec. 31, 2021
Fair Value of Identifiable Assets Acquired and Liabilities Assumed:
Operating Lease Liabilities		$ (2,405,751)	$ (2,171,472)
Goodwill initially recorded		4,831,306	$ 4,463,531
2022 Acquisitions
Business Acquisition [Line Items]
Cash paid (gross of cash acquired)		756,003
Deferred purchase obligation, purchase price holdbacks and other		279,734
Total Consideration		1,035,737
Fair Value of Identifiable Assets Acquired and Liabilities Assumed:
Cash		31,571
Accounts Receivable, Prepaid Expenses and Other Assets		73,351
Property, Plant and Equipment		7,893
Operating Lease Right-of-Use Assets		32,680
Accounts Payable, Accrued Expenses and Other Liabilities		(60,683)
Operating Lease Liabilities		(32,680)
Deferred Income Taxes		(142,019)
Total Fair Value of Identifiable Net Assets Acquired		448,835
Goodwill initially recorded		586,902
Proceeds from previous acquisition		219
Deferred purchase obligation, purchase price holdbacks and other, fair value		275,100
2022 Acquisitions | Customer Relationships
Fair Value of Identifiable Assets Acquired and Liabilities Assumed:
Intangible assets		491,422
2022 Acquisitions | Other Intangible Assets
Fair Value of Identifiable Assets Acquired and Liabilities Assumed:
Intangible assets		47,300
Other 2022 Acquisition
Business Acquisition [Line Items]
Deferred purchase obligation, purchase price holdbacks and other		$ 4,600
Total Consideration	$ 11,000
ITRenew
Business Acquisition [Line Items]
Cash paid (gross of cash acquired)	748,846
Total Consideration	$ 725
Fair Value of Identifiable Assets Acquired and Liabilities Assumed:
Acquired finite-lived intangible assets, weighted average useful life		11 years

Investments (Details)

Investments (Details) ₨ in Thousands, $ in Thousands	1 Months Ended	9 Months Ended
	Feb. 28, 2022 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 INR (₨)	Aug. 31, 2022 USD ($)	Aug. 31, 2022 INR (₨)	Dec. 31, 2021	Apr. 30, 2021 USD ($)	Apr. 30, 2021 INR (₨)
Schedule of Equity Method Investments [Line Items]
Equity in Other Comprehensive (Loss) Income of Subsidiaries		$ 35,821	$ 0
Web Werks JV
Schedule of Equity Method Investments [Line Items]
Equity method investments, fair value disclosure					$ 46,100	₨ 3,750,000		$ 50,100	₨ 3,750
Additional equity method investments, fair value disclosure | ₨				₨ 7,500
MakeSpace JV
Schedule of Equity Method Investments [Line Items]
Ownership percentage	49.99%			0%			49.99%
Equity in Other Comprehensive (Loss) Income of Subsidiaries	$ 35,800
Clutter JV
Schedule of Equity Method Investments [Line Items]
Ownership percentage	27%			26.73%			0%

Investments - Schedule of Inves

Investments - Schedule of Investments (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Feb. 28, 2022	Dec. 31, 2021
Web Werks JV
Schedule of Equity Method Investments [Line Items]
CARRYING VALUE	$ 97,877		$ 51,140
EQUITY INTEREST	55.40%		38.50%
Joint venture with AGC Equity Partners (the "Frankfurt JV")
Schedule of Equity Method Investments [Line Items]
CARRYING VALUE	$ 27,004		$ 26,167
EQUITY INTEREST	20%		20%
MakeSpace JV
Schedule of Equity Method Investments [Line Items]
CARRYING VALUE	$ 0		$ 30,154
EQUITY INTEREST	0%	49.99%	49.99%
Clutter JV
Schedule of Equity Method Investments [Line Items]
CARRYING VALUE	$ 57,113		$ 0
EQUITY INTEREST	26.73%	27%	0%

Derivative Instruments and He_3

Derivative Instruments and Hedging Activities - Additional Information (Details) € in Thousands, $ in Thousands	Sep. 30, 2022 USD ($)	May 31, 2022 USD ($)	May 31, 2022 EUR (€)	Sep. 30, 2020 USD ($)	Sep. 30, 2020 EUR (€)	Aug. 31, 2019 USD ($)	Aug. 31, 2019 EUR (€)
March 2024 Interest Rate Swap Agreements
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	$ 350,000
Cross-currency Swap Agreements | Net Investment Hedges
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount		$ 359,200	€ 340,500	$ 359,200	€ 300,000	$ 110,000	€ 99,055
Interest rate (as a percent)		4.50%	4.50%	4.50%	4.50%	6%	6%
Weighted average interest rate (as a percent)		1.20%	1.20%	3.40%	3.40%	3.65%	3.65%

Derivative Instruments and He_4

Derivative Instruments and Hedging Activities - Net Investment Hedges (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Assets					$ 11,021
Prepaid Expenses And Other
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Assets	$ 12,938		$ 12,938
Other Assets
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Assets	72,949		72,949
Accrued Expenses And Other Current Liabilities
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative liabilities					(2,082)
Other Long-Term Liabilities
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative liabilities					(6,262)
Net Investment Hedges
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Cumulative net gain in cross-currency swaps	73,008		73,008
March 2024 Interest Rate Swap Agreements
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Cumulative net gain in AOCI	12,879		12,879
March 2024 Interest Rate Swap Agreements | Cash Flow Hedges
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Assets	12,879		12,879
Derivative liabilities					(7,680)
March 2024 Interest Rate Swap Agreements | Designated as Hedging Instrument | Cash Flow Hedges
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Unrealized gains (losses) associated with interest rate swap agreements	5,157	$ 1,950	20,559	$ 7,946
August 2023 Cross-Currency Swap Agreements | Net Investment Hedges
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Assets	12,938		12,938
Derivative liabilities					(664)
August 2023 Cross-Currency Swap Agreements | Designated as Hedging Instrument | Net Investment Hedges
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Unrealized gains (losses) associated with cross-currency swaps	6,771	2,655	13,602	5,933
February 2026 Cross-Currency Swap Agreements | Net Investment Hedges
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Assets	60,070		60,070		$ 11,021
February 2026 Cross-Currency Swap Agreements | Designated as Hedging Instrument | Net Investment Hedges
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Unrealized gains (losses) associated with cross-currency swaps	$ 20,305	$ 10,060	$ 49,049	$ 21,626

Debt - Schedule of Long Term De

Debt - Schedule of Long Term Debt (Details) $ in Thousands, $ in Thousands	Sep. 30, 2022 USD ($)	Sep. 30, 2022 AUD ($)	Dec. 31, 2021 USD ($)
Debt Instrument [Line Items]
DEBT (INCLUSIVE OF DISCOUNT)	$ 10,395,281		$ 9,364,451
UNAMORTIZED DEFERRED FINANCING COSTS	(85,160)		(92,510)
CARRYING AMOUNT	10,310,121		9,271,941
Long-term debt, gross, current maturities	(81,275)		(310,084)
Long term debt, gross, net of current portion	10,314,006		9,054,367
Unamortized deferred financing costs, current	0		656
Unamortized deferred financing costs, noncurrent	(85,160)		(91,854)
Carrying amount, current maturities	(81,275)		(309,428)
Carrying amount, excluding current maturities	10,228,846		8,962,513
Australian Dollar Term Loan
Debt Instrument [Line Items]
DEBT (INCLUSIVE OF DISCOUNT)	193,140	$ 302,041	223,182
UNAMORTIZED DEFERRED FINANCING COSTS	(464)		(656)
CARRYING AMOUNT	192,676		222,526
FAIR VALUE	193,140		223,530
Real Estate Mortgages, Financing Lease Liabilities and Other
Debt Instrument [Line Items]
DEBT (INCLUSIVE OF DISCOUNT)	407,646		460,648
UNAMORTIZED DEFERRED FINANCING COSTS	(643)		(840)
CARRYING AMOUNT	407,003		459,808
FAIR VALUE	407,646		460,648
Accounts Receivable Securitization Program
Debt Instrument [Line Items]
DEBT (INCLUSIVE OF DISCOUNT)	316,700		0
UNAMORTIZED DEFERRED FINANCING COSTS	(584)		(450)
CARRYING AMOUNT	316,116		(450)
FAIR VALUE	316,700		0
New Credit Agreement | Revolving Credit Facility
Debt Instrument [Line Items]
DEBT (INCLUSIVE OF DISCOUNT)	890,000		0
UNAMORTIZED DEFERRED FINANCING COSTS	(7,899)		(5,174)
CARRYING AMOUNT	882,101		(5,174)
FAIR VALUE	890,000		0
Term Loan A | Term Loan Facility
Debt Instrument [Line Items]
DEBT (INCLUSIVE OF DISCOUNT)	243,750		203,125
UNAMORTIZED DEFERRED FINANCING COSTS	0		0
CARRYING AMOUNT	243,750		203,125
FAIR VALUE	243,750		203,125
Term Loan B | Term Loan Facility
Debt Instrument [Line Items]
DEBT (INCLUSIVE OF DISCOUNT)	667,766		672,847
UNAMORTIZED DEFERRED FINANCING COSTS	(4,059)		(4,995)
CARRYING AMOUNT	663,707		667,852
FAIR VALUE	668,500		675,500
UK Bilateral Revolving Credit Facility | Revolving Credit Facility
Debt Instrument [Line Items]
DEBT (INCLUSIVE OF DISCOUNT)	155,887		189,168
UNAMORTIZED DEFERRED FINANCING COSTS	(175)		(709)
CARRYING AMOUNT	155,712		188,459
FAIR VALUE	$ 155,887		189,168
37/8% GBP Senior Notes due 2025 (the "GBP Notes") | Senior Notes
Debt Instrument [Line Items]
Stated interest rate (as a percent)	3.875%	3.875%
DEBT (INCLUSIVE OF DISCOUNT)	$ 445,392		540,481
UNAMORTIZED DEFERRED FINANCING COSTS	(2,593)		(3,912)
CARRYING AMOUNT	442,799		536,569
FAIR VALUE	$ 392,373		542,508
47/8% Senior Notes due 2027 (the “47/8% Notes due 2027”) | Senior Notes
Debt Instrument [Line Items]
Stated interest rate (as a percent)	4.875%	4.875%
DEBT (INCLUSIVE OF DISCOUNT)	$ 1,000,000		1,000,000
UNAMORTIZED DEFERRED FINANCING COSTS	(7,110)		(8,176)
CARRYING AMOUNT	992,890		991,824
FAIR VALUE	$ 892,500		1,030,000
51/4% Senior Notes due 2028 (the “51/4% Notes due 2028”) | Senior Notes
Debt Instrument [Line Items]
Stated interest rate (as a percent)	5.25%	5.25%
DEBT (INCLUSIVE OF DISCOUNT)	$ 825,000		825,000
UNAMORTIZED DEFERRED FINANCING COSTS	(6,495)		(7,380)
CARRYING AMOUNT	818,505		817,620
FAIR VALUE	$ 719,813		862,125
5% Senior Notes due 2028 (the “5% Notes due 2028”) | Senior Notes
Debt Instrument [Line Items]
Stated interest rate (as a percent)	5%	5%
DEBT (INCLUSIVE OF DISCOUNT)	$ 500,000		500,000
UNAMORTIZED DEFERRED FINANCING COSTS	(4,220)		(4,763)
CARRYING AMOUNT	495,780		495,237
FAIR VALUE	$ 428,750		513,750
47/8% Senior Notes due 2029 (the “47/8% Notes due 2029”) | Senior Notes
Debt Instrument [Line Items]
Stated interest rate (as a percent)	4.875%	4.875%
DEBT (INCLUSIVE OF DISCOUNT)	$ 1,000,000		1,000,000
UNAMORTIZED DEFERRED FINANCING COSTS	(10,126)		(11,211)
CARRYING AMOUNT	989,874		988,789
FAIR VALUE	$ 815,000		1,022,500
51/4% Senior Notes due 2030 (the “51/4 Notes due 2030”) | Senior Notes
Debt Instrument [Line Items]
Stated interest rate (as a percent)	5.25%	5.25%
DEBT (INCLUSIVE OF DISCOUNT)	$ 1,300,000		1,300,000
UNAMORTIZED DEFERRED FINANCING COSTS	(11,783)		(12,911)
CARRYING AMOUNT	1,288,217		1,287,089
FAIR VALUE	$ 1,072,500		1,355,250
41/2% Senior Notes due 2031 (the “41/2% Notes”) | Senior Notes
Debt Instrument [Line Items]
Stated interest rate (as a percent)	4.50%	4.50%
DEBT (INCLUSIVE OF DISCOUNT)	$ 1,100,000		1,100,000
UNAMORTIZED DEFERRED FINANCING COSTS	(10,471)		(11,404)
CARRYING AMOUNT	1,089,529		1,088,596
FAIR VALUE	$ 847,000		1,094,500
5% Senior Notes due 2032 (the "5% Notes due 2032") | Senior Notes
Debt Instrument [Line Items]
Stated interest rate (as a percent)	5%	5%
DEBT (INCLUSIVE OF DISCOUNT)	$ 750,000		750,000
UNAMORTIZED DEFERRED FINANCING COSTS	(12,827)		(13,782)
CARRYING AMOUNT	737,173		736,218
FAIR VALUE	$ 477,000		767,813
55/8% Senior Notes due 2032 (the "55/8% Notes") | Senior Notes
Debt Instrument [Line Items]
Stated interest rate (as a percent)	5.625%	5.625%
DEBT (INCLUSIVE OF DISCOUNT)	$ 600,000		600,000
UNAMORTIZED DEFERRED FINANCING COSTS	(5,711)		(6,147)
CARRYING AMOUNT	594,289		593,853
FAIR VALUE	$ 579,375		$ 637,500

Debt - Credit Agreements (Detai

Debt - Credit Agreements (Details)	Sep. 30, 2022 USD ($)	Mar. 18, 2022 measurement	Mar. 17, 2022 USD ($) measurement	Dec. 31, 2021 USD ($)
Debt Instrument [Line Items]
Leveraged leases, adjusted covenant ratio | measurement		7	6.5
Outstanding borrowings	$ 10,395,281,000			$ 9,364,451,000
Revolving Credit Facility
Debt Instrument [Line Items]
Letters of credit outstanding	3,779,000
Remaining capacity	1,356,221,000
New Credit Agreement | Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity	2,250,000,000		$ 1,750,000,000
Outstanding borrowings	$ 890,000,000			0
Average interest rate (as a percent)	4.70%
Term Loan A | Term Loan Facility
Debt Instrument [Line Items]
Principal amount	$ 250,000,000
Outstanding borrowings	$ 243,750,000			$ 203,125,000
Average interest rate (as a percent)	4.90%
Term B Loan Facility | Term Loan Facility
Debt Instrument [Line Items]
Principal amount	$ 700,000,000
Outstanding borrowings	$ 668,500,000
Average interest rate (as a percent)	4.20%

Debt - Australian Dollar Term L

Debt - Australian Dollar Term Loan (Details) $ in Thousands, $ in Thousands		12 Months Ended
	Mar. 18, 2022	Dec. 31, 2021 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2022 AUD ($)
Debt Instrument [Line Items]
Outstanding borrowings		$ 9,364,451	$ 10,395,281
Australian Dollar Term Loan
Debt Instrument [Line Items]
Principal amount			350
Outstanding borrowings		$ 223,182	$ 193,140	$ 302,041
Australian Dollar Term Loan | BBSY
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	3.625%	3.875%
Effective interest rate (as a percent)			6.70%	6.70%

Debt - UK Bilateral Revolving C

Debt - UK Bilateral Revolving Credit Facility (Details) - UK Bilateral Revolving Credit Facility	Sep. 30, 2022 GBP (£)
Debt Instrument [Line Items]
Effective interest rate (as a percent)	4.20%
Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity	£ 140,000
Additional borrowing capacity	£ 125,000,000

Debt - Accounts Receivable Secu

Debt - Accounts Receivable Securitization Program Narrative (Details) - Accounts Receivable Securitization Program - USD ($)	Jun. 29, 2022	Sep. 30, 2022	Jun. 28, 2022
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 325,000,000	$ 316,700,000	$ 300,000,000
Debt instrument, basis spread on variable rate	0.10%
Effective interest rate (as a percent)		4.10%
Maximum
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 400,000,000
LIBOR
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	1%
SOFR
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	0.95%

Debt - Cash Pooling (Details)

Debt - Cash Pooling (Details) $ in Thousands	Sep. 30, 2022 USD ($) cash_pool	Dec. 31, 2021 USD ($)
Bank Mendes Gans
Debt Instrument [Line Items]
Number of cash pools | cash_pool	2
QRS Cash Pool | Bank Mendes Gans
Debt Instrument [Line Items]
Number of cash pools | cash_pool	1
GROSS CASH POSITION	$ 590,127	$ 552,900
OUTSTANDING DEBIT BALANCES	(588,633)	(552,100)
NET CASH POSITION	$ 1,494	800
QRS Cash Pool | JP Morgan Chase Bank
Debt Instrument [Line Items]
Number of cash pools | cash_pool	1
QRS Cash Pool | JP Morgan Chase Bank | EMEA
Debt Instrument [Line Items]
Number of cash pools | cash_pool	2
GROSS CASH POSITION	$ 6,030	0
OUTSTANDING DEBIT BALANCES	(5,718)	0
NET CASH POSITION	$ 312	0
QRS Cash Pool | JP Morgan Chase Bank | APAC
Debt Instrument [Line Items]
Number of cash pools | cash_pool	2
GROSS CASH POSITION	$ 23,561	9,400
OUTSTANDING DEBIT BALANCES	(23,394)	(9,200)
NET CASH POSITION	$ 167	200
TRS Cash Pool | Bank Mendes Gans
Debt Instrument [Line Items]
Number of cash pools | cash_pool	1
GROSS CASH POSITION	$ 539,557	606,000
OUTSTANDING DEBIT BALANCES	(538,498)	(603,900)
NET CASH POSITION	$ 1,059	2,100
TRS Cash Pool | JP Morgan Chase Bank
Debt Instrument [Line Items]
Number of cash pools | cash_pool	1
TRS Cash Pool | JP Morgan Chase Bank | EMEA
Debt Instrument [Line Items]
GROSS CASH POSITION	$ 2,104	0
OUTSTANDING DEBIT BALANCES	(2,044)	0
NET CASH POSITION	60	0
TRS Cash Pool | JP Morgan Chase Bank | APAC
Debt Instrument [Line Items]
GROSS CASH POSITION	22,272	12,000
OUTSTANDING DEBIT BALANCES	(21,899)	(9,900)
NET CASH POSITION	$ 373	$ 2,100

Debt - Letters of Credit (Detai

Debt - Letters of Credit (Details) - Credit Agreement $ in Thousands	Sep. 30, 2022 USD ($)
Debt Instrument [Line Items]
Letters of credit outstanding	$ 37,221
Revolving Credit Facility
Debt Instrument [Line Items]
Letters of credit outstanding	$ 3,779

Commitments and Contingencies (

Commitments and Contingencies (Details) $ in Thousands	Sep. 30, 2022 USD ($)
Insurance settlement
Commitments and Contingencies
Reasonably possible additional losses	$ 24,000

Stockholders' Equity Matters (D

Stockholders' Equity Matters (Details) - USD ($) $ / shares in Units, $ in Thousands

3 Months Ended

9 Months Ended

Nov. 03, 2022

Oct. 04, 2022

Aug. 04, 2022

Jul. 06, 2022

Apr. 28, 2022

Apr. 06, 2022

Feb. 24, 2022

Jan. 06, 2022

Nov. 04, 2021

Oct. 06, 2021

Aug. 05, 2021

Jul. 06, 2021

May 06, 2021

Apr. 06, 2021

Feb. 24, 2021

Sep. 30, 2022

Sep. 30, 2021

Sep. 30, 2022

Sep. 30, 2021

Debt Instrument [Line Items]

Dividend per share (in dollars per share)

$ 0.6185

$ 0.6185

$ 0.6185

$ 0.6185

$ 0.6185

$ 0.6185

$ 0.6185

TOTAL AMOUNT

$ 179,781

$ 179,661

$ 179,132

$ 179,080

$ 179,026

$ 178,569

$ 181,385

$ 180,600

$ 543,605

$ 540,045

Subsequent Event

Debt Instrument [Line Items]

Dividend per share (in dollars per share)

$ 0.6185

TOTAL AMOUNT

$ 179,790

Segment Information - Segment R

Segment Information - Segment Reporting Information by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Segment Reporting Information [Line Items]
Revenues	$ 1,286,945	$ 1,130,148	$ 3,824,525	$ 3,331,944
Adjusted EBITDA	469,434	417,769	1,355,134	1,203,965
Global RIM Business
Segment Reporting Information [Line Items]
Revenues	1,091,102	997,843	3,210,469	2,971,085
Adjusted EBITDA	483,862	435,904	1,402,025	1,263,277
Global Data Center Business
Segment Reporting Information [Line Items]
Revenues	100,309	88,587	297,384	236,672
Adjusted EBITDA	42,660	35,097	126,944	98,961
Corporate and Other Business
Segment Reporting Information [Line Items]
Revenues	95,534	43,718	316,672	124,187
Adjusted EBITDA	$ (57,088)	$ (53,232)	$ (173,835)	$ (158,273)

Segment Information - Reconcili

Segment Information - Reconciliation to of Net Income to Adjusted EBITDA (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Reconciliation to of Net Income to Adjusted EBITDA
Net Income (Loss)	$ 192,931	$ 68,111	$ 436,496	$ 391,264
Interest expense, net	121,767	103,809	351,266	313,451
Provision (benefit) for income taxes	23,934	28,017	52,097	153,073
Depreciation and amortization	175,077	174,818	536,946	507,145
Acquisition and Integration Costs	5,554	1,138	38,093	3,415
Restructuring charges	3,382	50,432	3,382	129,686
(Gain) loss on disposal/write-down of property, plant and equipment, net (including real estate)	(14,170)	(935)	(66,124)	(134,321)
Other (income) expense, net, excluding our share of losses (gains) from our unconsolidated joint ventures	(56,226)	(21,517)	(48,814)	(209,001)
Stock-based compensation expense	14,326	12,644	45,923	45,913
Our share of Adjusted EBITDA reconciling items from our unconsolidated joint ventures	2,859	1,252	5,869	3,340
Adjusted EBITDA	$ 469,434	$ 417,769	$ 1,355,134	$ 1,203,965

Segment Information - Revenues

Segment Information - Revenues by Product and Service Lines by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Segment Reporting Information [Line Items]
Revenues	$ 1,286,945	$ 1,130,148	$ 3,824,525	$ 3,331,944
GLOBAL RIM BUSINESS
Segment Reporting Information [Line Items]
Revenues	1,091,102	997,843	3,210,469	2,971,085
GLOBAL DATA CENTER BUSINESS
Segment Reporting Information [Line Items]
Revenues	100,309	88,587	297,384	236,672
CORPORATE AND OTHER BUSINESS
Segment Reporting Information [Line Items]
Revenues	95,534	43,718	316,672	124,187
Records Management
Segment Reporting Information [Line Items]
Revenues	865,144	797,512	2,554,729	2,376,850
Records Management | GLOBAL RIM BUSINESS
Segment Reporting Information [Line Items]
Revenues	829,357	767,059	2,450,903	2,285,000
Records Management | GLOBAL DATA CENTER BUSINESS
Segment Reporting Information [Line Items]
Revenues	0	0	0	0
Records Management | CORPORATE AND OTHER BUSINESS
Segment Reporting Information [Line Items]
Revenues	35,787	30,453	103,826	91,850
Data Management
Segment Reporting Information [Line Items]
Revenues	127,226	130,679	385,276	399,420
Data Management | GLOBAL RIM BUSINESS
Segment Reporting Information [Line Items]
Revenues	127,226	130,679	385,276	399,420
Data Management | GLOBAL DATA CENTER BUSINESS
Segment Reporting Information [Line Items]
Revenues	0	0	0	0
Data Management | CORPORATE AND OTHER BUSINESS
Segment Reporting Information [Line Items]
Revenues	0	0	0	0
Information Destruction
Segment Reporting Information [Line Items]
Revenues	194,266	113,370	587,136	319,002
Information Destruction | GLOBAL RIM BUSINESS
Segment Reporting Information [Line Items]
Revenues	134,519	100,105	374,290	286,665
Information Destruction | GLOBAL DATA CENTER BUSINESS
Segment Reporting Information [Line Items]
Revenues	0	0	0	0
Information Destruction | CORPORATE AND OTHER BUSINESS
Segment Reporting Information [Line Items]
Revenues	59,747	13,265	212,846	32,337
Data Center
Segment Reporting Information [Line Items]
Revenues	100,309	88,587	297,384	236,672
Data Center | GLOBAL RIM BUSINESS
Segment Reporting Information [Line Items]
Revenues	0	0	0	0
Data Center | GLOBAL DATA CENTER BUSINESS
Segment Reporting Information [Line Items]
Revenues	100,309	88,587	297,384	236,672
Data Center | CORPORATE AND OTHER BUSINESS
Segment Reporting Information [Line Items]
Revenues	$ 0	$ 0	$ 0	$ 0

Related Parties (Details)

Related Parties (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Frankfurt JV
Related Party Transaction [Line Items]
Revenue	$ 700	$ 1,200	$ 13,500	$ 3,100
Makespace And Clutter
Related Party Transaction [Line Items]
Revenue	$ 6,900	$ 9,300	$ 21,300	$ 24,900

Restructuring Charges (Details)

Restructuring Charges (Details) - USD ($)	3 Months Ended		9 Months Ended		27 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 3,382,000	$ 50,432,000	$ 3,382,000	$ 129,686,000
Project Matterhorn
Restructuring Cost and Reserve [Line Items]
Expected cost	150,000,000		150,000,000
Project Summit costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 0	50,432,000	$ 0	129,686,000	$ 450,000,000
Project Summit costs | Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring charges		6,797,000		14,526,000
Project Summit costs | Accrued Professional Fees
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 43,635,000		$ 115,160,000