Martin Marietta Materials (MLM) 10-Q28 Jul 222022 Q2 Quarterly reportFinancial data

Company Profile

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
Document and Entity Information - shares	Jun. 30, 2022	Jul. 25, 2022
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2022
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q2
Trading Symbol	MLM
Entity Registrant Name	MARTIN MARIETTA MATERIALS, INC.
Entity Central Index Key	0000916076
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Shell Company	false
Entity Small Business	false
Entity Emerging Growth Company	false
Title of 12(b) Security	Common Stock (Par Value $0.01)
Security Exchange Name	NYSE
Entity File Number	1-12744
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Incorporation, State or Country Code	NC
Entity Tax Identification Number	56-1848578
Entity Address, Address Line One	4123 Parklake Avenue
Entity Address, City or Town	Raleigh
Entity Address, State or Province	NC
Entity Address, Postal Zip Code	27612
City Area Code	919
Local Phone Number	781-4550
Document Quarterly Report	true
Document Transition Report	false
Entity Common Stock, Shares Outstanding		62,374,140

Consolidated Balance Sheets (Un

Consolidated Balance Sheets (Unaudited) - USD ($)	Jun. 30, 2022	Dec. 31, 2021
Current Assets:
Cash and cash equivalents	$ 772,100,000	$ 258,400,000
Restricted cash	0	500,000
Accounts receivable, net	1,026,600,000	774,000,000
Inventories, net	835,200,000	752,600,000
Current assets held for sale	57,500,000	102,200,000
Other current assets	68,900,000	137,900,000
Total Current Assets	2,760,300,000	2,025,600,000
Property, plant and equipment	10,311,500,000	10,370,000,000
Allowances for depreciation, depletion and amortization	(4,147,200,000)	(4,032,000,000)
Net property, plant and equipment	6,164,300,000	6,338,000,000
Goodwill	3,400,500,000	3,494,400,000
Other intangibles, net	1,043,600,000	1,065,000,000
Operating lease right-of-use assets, net	402,300,000	426,700,000
Noncurrent assets held for sale	388,200,000	616,900,000
Other noncurrent assets	383,600,000	426,400,000
Total Assets	14,542,800,000	14,393,000,000
Current Liabilities:
Accounts payable	359,700,000	356,200,000
Accrued salaries, benefits and payroll taxes	57,700,000	86,600,000
Accrued other taxes	106,500,000	58,400,000
Accrued interest	42,800,000	48,000,000
Operating lease liabilities	54,400,000	53,900,000
Current liabilities held for sale	5,200,000	7,500,000
Other current liabilities	135,100,000	142,000,000
Total Current Liabilities	761,400,000	752,600,000
Long-term debt	5,044,300,000	5,100,800,000
Deferred income taxes, net	852,800,000	895,300,000
Noncurrent operating lease liabilities	356,300,000	379,400,000
Noncurrent liabilities held for sale	29,100,000	53,500,000
Other noncurrent liabilities	726,800,000	673,800,000
Total Liabilities	7,770,700,000	7,855,400,000
Equity:
Common stock, par value $0.01 per share (62.4 shares outstanding at June 30, 2022 and December 31, 2021)	600,000	600,000
Preferred stock, par value $0.01 per share	0	0
Additional paid-in capital	3,474,400,000	3,470,400,000
Accumulated other comprehensive loss	(128,100,000)	(97,600,000)
Retained earnings	3,423,100,000	3,161,900,000
Total Shareholders' Equity	6,770,000,000	6,535,300,000
Noncontrolling interests	2,100,000	2,300,000
Total Equity	6,772,100,000	6,537,600,000
Total Liabilities and Equity	$ 14,542,800,000	$ 14,393,000,000

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares shares in Millions	Jun. 30, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares outstanding	62.4	62.4
Preferred stock, par value	$ 0.01	$ 0.01

Consolidated Statements of Earn

Consolidated Statements of Earnings and Comprehensive Earnings (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Total Revenues	$ 1,641.7	$ 1,377.9	$ 2,872.5	$ 2,360.3
Total Cost of Revenues	1,216.5	992.8	2,291.2	1,800.5
Gross Profit	425.2	385.1	581.3	559.8
Selling, general & administrative expenses	104.1	82.4	201.2	162.2
Acquisition and integration expenses	2.9	9.3	4.3	10.6
Other operating income, net	(160.4)	(14.1)	(162.6)	(19.8)
Earnings from Operations	478.6	307.5	538.4	406.8
Interest expense	43.1	28.1	83.6	55.6
Other nonoperating income, net	(22)	(8.7)	(32.9)	(18.2)
Earnings from continuing operations before income tax expense	457.5	288.1	487.7	369.4
Income tax expense	104.4	62.3	110.2	78.1
Earnings from continuing operations	353.1	225.8	377.5	291.3
Earnings from discontinued operations, net of income tax expense	13.3	0	10.2	0
Consolidated net earnings	366.4	225.8	387.7	291.3
Less: Net (loss) earnings attributable to noncontrolling interests	(0.1)	0	(0.2)	0.2
Net Earnings Attributable to Martin Marietta Materials, Inc.	366.5	225.8	387.9	291.1
Consolidated Comprehensive Earnings (Loss) :
Earnings attributable to Martin Marietta Materials, Inc.	367.7	228.4	357.4	296.5
(Loss) Earnings attributable to noncontrolling interests	(0.1)	0	(0.2)	0.2
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	$ 367.6	$ 228.4	$ 357.2	$ 296.7
Net Earnings Attributable to Martin Marietta Materials, Inc. Per Common Share
Basic from continuing operations attributable to common shareholders	$ 5.66	$ 3.62	$ 6.06	$ 4.66
Basic from discontinued operations attributable to common shareholders	0.21	0	0.16	0
Basic attributable to common shareholders	5.87	3.62	6.22	4.66
Diluted from continuing operations attributable to common shareholders	5.65	3.61	6.04	4.65
Diluted from discontinued operations attributable to common shareholders	0.21	0	0.16	0
Diluted attributable to common shareholders	$ 5.86	$ 3.61	$ 6.20	$ 4.65
Weighted-Average Common Shares Outstanding:
Basic	62.4	62.4	62.4	62.4
Diluted	62.5	62.5	62.6	62.5
Products and Services
Total Revenues	$ 1,523.8	$ 1,295.3	$ 2,671.6	$ 2,217.2
Total Cost of Revenues	1,095.6	910	2,087.5	1,656
Freight
Total Revenues	117.9	82.6	200.9	143.1
Total Cost of Revenues	$ 120.9	$ 82.8	$ 203.7	$ 144.5

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash Flows from Operating Activities:
Consolidated net earnings	$ 387.7	$ 291.3
Adjustments to reconcile consolidated net earnings to net cash provided by operating activities:
Depreciation, depletion and amortization	256.6	206.5
Stock-based compensation expense	24.5	20.8
Gain on divestitures, sales of assets and extinguishment of debt	(173.9)	(19.2)
Deferred income taxes, net	(32.7)	3.4
Other items, net	(3.4)	(7.3)
Changes in operating assets and liabilities, net of effects of acquisitions and divestitures:
Accounts receivable, net	(252.6)	(137.8)
Inventories, net	(79.5)	36.9
Accounts payable	68.5	54.7
Other assets and liabilities, net	91	(8.1)
Net Cash Provided by Operating Activities	286.2	441.2
Cash Flows from Investing Activities:
Additions to property, plant and equipment	(220.7)	(213)
Acquisitions, net of cash acquired	11	(653.2)
Proceeds from divestitures and sales of assets	644.4	31.9
Investments in life insurance contracts, net	1.8	11.2
Other investing activities, net	(3)
Net Cash Provided by (Used for) Investing Activities	433.5	(823.1)
Cash Flows from Financing Activities:
Borrowings of debt	0	400
Repayments of debt	(47.7)	(160)
Payments on finance lease obligations	(7.3)	(4.3)
Debt issuance costs	0	(0.3)
Distributions to owners of noncontrolling interest	0	(0.5)
Repurchases of common stock	(50)	0
Dividends paid	(77)	(71.8)
Proceeds from exercise of stock options	0.6	0.8
Shares withheld for employees' income tax obligations	(25.1)	(16.1)
Net Cash (Used for) Provided by Financing Activities	(206.5)	147.8
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash	513.2	(234.1)
Cash, Cash Equivalents and Restricted Cash, beginning of period	258.9	304.4
Cash, Cash Equivalents and Restricted Cash, end of period	$ 772.1	$ 70.3

Consolidated Statements of Tota

Consolidated Statements of Total Equity (Unaudited) - USD ($) $ in Millions	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Retained Earnings	Total Shareholders' Equity	Noncontrolling Interests
Beginning Balance, Total Equity at Dec. 31, 2020	$ 5,893.3	$ 0.6	$ 3,440.8	$ (158.4)	$ 2,607.7	$ 5,890.7	$ 2.6
Beginning Balance (in shares) at Dec. 31, 2020		62,300,000
Consolidated net earnings (loss)	291.3				291.1	291.1	0.2
Other comprehensive earnings / loss, net of tax	5.4			5.4		5.4
Dividends declared	(71.6)				(71.6)	(71.6)
Issuances of common stock for stock award plans	5.6	$ 0	5.6	0	0	5.6	0
Issuances of common stock for stock award plans (in shares)		100,000
Shares withheld for employees' income tax obligations	(16.1)		(16.1)			(16.1)
Stock-based compensation expense	20.8		20.8			20.8
Distributions to owners of noncontrolling interest	(0.5)						0
Ending Balance, Total Equity at Jun. 30, 2021	6,128.2	$ 0.6	3,451.1	(153)	2,827.2	6,125.9	2.3
Ending Balance (in shares) at Jun. 30, 2021		62.4
Beginning Balance, Total Equity at Mar. 31, 2021	5,926.7	$ 0.6	3,441.7	(155.6)	2,637.2	5,923.9	2.8
Beginning Balance (in shares) at Mar. 31, 2021		62,400,000
Consolidated net earnings (loss)	225.8				225.8	225.8
Other comprehensive earnings / loss, net of tax	2.6			2.6		2.6
Dividends declared	(35.8)				(35.8)	(35.8)
Issuances of common stock for stock award plans	0.1		0.1			0.1
Shares withheld for employees' income tax obligations	(0.6)		(0.6)			(0.6)
Stock-based compensation expense	9.9		9.9			9.9
Distributions to owners of noncontrolling interest	(0.5)						0.5
Ending Balance, Total Equity at Jun. 30, 2021	6,128.2	$ 0.6	3,451.1	(153)	2,827.2	6,125.9	2.3
Ending Balance (in shares) at Jun. 30, 2021		62.4
Beginning Balance, Total Equity at Dec. 31, 2021	$ 6,537.6	$ 0.6	3,470.4	(97.6)	3,161.9	6,535.3	2.3
Beginning Balance (in shares) at Dec. 31, 2021	62,400,000	62,400,000
Consolidated net earnings (loss)	$ 387.7				387.9	387.9	(0.2)
Other comprehensive earnings / loss, net of tax	(30.5)			(30.5)		(30.5)
Dividends declared	(76.7)				76.7	76.7
Issuances of common stock for stock award plans	4.6		4.6			4.6
Shares withheld for employees' income tax obligations	(25.1)
Repurchases of common stock	(50)				(50)	(50)
Stock-based compensation expense	24.5		24.5			24.5
Ending Balance, Total Equity at Jun. 30, 2022	$ 6,772.1	$ 0.6	3,474.4	(128.1)	3,423.1	6,770	2.1
Ending Balance (in shares) at Jun. 30, 2022	62,400,000	62,400,000
Beginning Balance, Total Equity at Mar. 31, 2022	$ 6,431	$ 0.6	3,462.6	(129.3)	3,094.9	6,428.8	2.2
Beginning Balance (in shares) at Mar. 31, 2022		62,400,000
Consolidated net earnings (loss)	366.4				366.5	366.5	(0.1)
Other comprehensive earnings / loss, net of tax	1.2			1.2		1.2
Dividends declared	(38.3)				38.3	38.3
Issuances of common stock for stock award plans	0.1		0.1			0.1
Shares withheld for employees' income tax obligations	(0.7)		0.7			0.7
Stock-based compensation expense	12.4		12.4
Ending Balance, Total Equity at Jun. 30, 2022	$ 6,772.1	$ 0.6	$ 3,474.4	$ (128.1)	$ 3,423.1	$ 6,770	$ 2.1
Ending Balance (in shares) at Jun. 30, 2022	62,400,000	62,400,000

Consolidated Statements of To_2

Consolidated Statements of Total Equity (Parenthetical) (Unaudited) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Stockholders' Equity [Abstract]
Dividends declared	$ 0.61	$ 0.57	$ 1.22	$ 1.14

Significant Accounting Policies

Significant Accounting Policies	6 Months Ended
Significant Accounting Policies	Jun. 30, 2022
Accounting Policies [Abstract]
Significant Accounting Policies	1. Significant Accounting Policies Organization Martin Marietta Materials, Inc. (the Company or Martin Marietta) is a natural resource-based building materials company. As of June 30, 2022 , the Company supplies aggregates (crushed stone, sand and gravel) through its network of approximately 350 quarries, mines and distribution yards in 28 states, Canada and The Bahamas. Martin Marietta also provides cement and downstream products and services, namely, ready mixed concrete, asphalt and paving, in vertically-integrated structured markets where the Company has a leading aggregates position. In addition, the Company has one cement plant, cement distribution terminals and ready mixed concrete operations in California that are classified as assets held for sale and discontinued operations as of and for the six months ended June 30, 2022. The Company’s heavy-side building materials are used in infrastructure, nonresidential and residential construction projects. Aggregates are also used in agricultural, utility and environmental applications and as railroad ballast. The aggregates, cement, ready mixed concrete, asphalt and paving product lines are reported collectively as the “Building Materials” business. The Company’s Building Materials business includes two reportable segments: the East Group and the West Group. BUILDING MATERIALS BUSINESS Reportable Segments East Group West Group Operating Locations Alabama, Florida, Georgia, Indiana, Arizona, Arkansas, California, Colorado, Louisiana, Oklahoma, Texas, Utah, Product Lines Aggregates and Asphalt Aggregates, Cement, Ready Mixed Concrete, Asphalt and Paving The Company’s Magnesia Specialties business, which represents a separate reportable segment, has manufacturing facilities in Manistee, Michigan, and Woodville, Ohio. The Magnesia Specialties business produces magnesia-based chemicals products used in industrial, agricultural and environmental applications, and dolomitic lime sold primarily to customers in the steel and mining industries. Basis of Presentation The accompanying unaudited consolidated financial statements of the Company have been prepared in accordance with accounting principles generally accepted in the United States (U.S. GAAP) for interim financial information and with the instructions to the Quarterly Report on Form 10-Q and in Article 10 of Regulation S-X. The Company has continued to follow the accounting policies set forth in the audited consolidated financial statements and related notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2021. In the opinion of management, the interim consolidated financial information provided herein reflects all adjustments, consisting of normal recurring accruals, necessary for a fair statement of the results of operations, financial position and cash flows for the interim periods. The consolidated results of operations for the three and six months ended June 30, 2022 are not necessarily indicative of the results expected for other interim periods or the full year. The consolidated balance sheet at December 31, 2021 has been derived from the audited consolidated financial statements at that date but does not include all of the information and notes required by U.S. GAAP for complete financial statements. These consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2021. The preparation of the Company’s consolidated financial statements requires management to make certain estimates and assumptions about future events. As future events and their effects cannot be fully determined with precision, actual results could differ significantly from estimates. Changes in estimates are reflected in the consolidated financial statements in the period in which the change in estimate occurs. Consolidated Comprehensive Earnings (Loss) and Accumulated Other Comprehensive Loss Consolidated comprehensive earnings (loss) and accumulated other comprehensive loss consist of consolidated net earnings; adjustments for the funded status of pension and postretirement benefit plans; and foreign currency translation adjustments; and are presented in the Company’s consolidated statements of earnings and comprehensive earnings. Comprehensive earnings (loss) attributable to Martin Marietta is as follows: Three Months Ended Six Months Ended June 30, June 30, 2022 2021 2022 2021 (Dollars in Millions) Net earnings attributable to Martin Marietta $ 366.5 $ 225.8 $ 387.9 $ 291.1 Other comprehensive earnings (loss), net of tax 1.2 2.6 ( 30.5 ) 5.4 Comprehensive earnings attributable to $ 367.7 $ 228.4 $ 357.4 $ 296.5 Changes in accumulated other comprehensive loss, net of tax, are as follows: (Dollars in Millions) Pension and Foreign Currency Accumulated Three Months Ended June 30, 2022 Balance at beginning of period $ ( 129.7 ) $ 0.4 $ ( 129.3 ) Other comprehensive earnings (loss) before reclassifications, 0.4 ( 0.9 ) ( 0.5 ) Amounts reclassified from accumulated other 1.7 — 1.7 Other comprehensive earnings (loss), net of tax 2.1 ( 0.9 ) 1.2 Balance at end of period $ ( 127.6 ) $ ( 0.5 ) $ ( 128.1 ) Three Months Ended June 30, 2021 Balance at beginning of period $ ( 155.6 ) $ — $ ( 155.6 ) Other comprehensive earnings before reclassifications, — 0.5 0.5 Amounts reclassified from accumulated other 2.1 — 2.1 Other comprehensive earnings, net of tax 2.1 0.5 2.6 Balance at end of period $ ( 153.5 ) $ 0.5 $ ( 153.0 ) (Dollars in Millions) Pension and Foreign Currency Accumulated Six Months Ended June 30, 2022 Balance at beginning of period $ ( 97.6 ) $ — $ ( 97.6 ) Other comprehensive loss before reclassifications, ( 33.0 ) ( 0.5 ) ( 33.5 ) Amounts reclassified from accumulated other 3.0 — 3.0 Other comprehensive loss, net of tax ( 30.0 ) ( 0.5 ) ( 30.5 ) Balance at end of period $ ( 127.6 ) $ ( 0.5 ) $ ( 128.1 ) Six Months Ended June 30, 2021 Balance at beginning of period $ ( 158.1 ) $ ( 0.3 ) $ ( 158.4 ) Other comprehensive earnings before reclassifications, — 0.8 0.8 Amounts reclassified from accumulated other 4.6 — 4.6 Other comprehensive earnings, net of tax 4.6 0.8 5.4 Balance at end of period $ ( 153.5 ) $ 0.5 $ ( 153.0 ) The $ 33.0 million, net of tax, other comprehensive loss before reclassifications in the Pension and Postretirement Benefit Plans for the six months ended June 30, 2022 is driven by the remeasurement of the funded status of the Company’s qualified pension plan, required as a result of a plan amendment that provided an enhanced benefit for eligible hourly employees. Changes in net noncurrent deferred tax assets related to accumulated other comprehensive loss are as follows: Pension and Postretirement Benefit Plans Three Months Ended Six Months Ended June 30, June 30, 2022 2021 2022 2021 (Dollars in Millions) Balance at beginning of period $ 80.2 $ 88.7 $ 69.7 $ 89.4 Tax effect of other comprehensive (earnings) loss ( 0.7 ) ( 0.8 ) 9.8 ( 1.5 ) Balance at end of period $ 79.5 $ 87.9 $ 79.5 $ 87.9 Reclassifications out of accumulated other comprehensive loss are as follows: Three Months Ended Six Months Ended Affected line items in the June 30, June 30, consolidated statements of earnings 2022 2021 2022 2021 and comprehensive earnings (Dollars in Millions) Pension and postretirement Amortization of: Prior service cost $ 1.2 $ 0.1 $ 2.1 $ — Actuarial loss 1.1 2.8 1.9 6.1 2.3 2.9 4.0 6.1 Other nonoperating income, net Tax benefit ( 0.6 ) ( 0.8 ) ( 1.0 ) ( 1.5 ) Income tax expense $ 1.7 $ 2.1 $ 3.0 $ 4.6 Earnings per Common Share The numerator for basic and diluted earnings per common share is net earnings attributable to Martin Marietta reduced by dividends and undistributed earnings attributable to certain of the Company’s stock-based compensation arrangements. If there is a net loss, no amount of the undistributed loss is attributed to unvested participating securities. The denominator for basic earnings per common share is the weighted-average number of common shares outstanding during the period. Diluted earnings per common share are computed assuming that the weighted-average number of common shares is increased by the conversion, using the treasury stock method, of awards to be issued to employees and nonemployee members of the Company’s Board of Directors under certain stock-based compensation arrangements if the conversion is dilutive. For the three and six months ended June 30, 2022 and 2021 , the diluted per-share computations reflect the number of common shares outstanding to include the number of additional shares that would have been outstanding if the potentially dilutive common shares had been issued. The following table reconciles the numerator and denominator for basic and diluted earnings from continuing operations per common share: Three Months Ended Six Months Ended June 30, June 30, 2022 2021 2022 2021 (In Millions) Net earnings from continuing operations attributable to $ 353.2 $ 225.8 $ 377.7 $ 291.1 Less: Distributed and undistributed earnings — 0.2 — 0.2 Basic and diluted net earnings from continuing operations $ 353.2 $ 225.6 $ 377.7 $ 290.9 Basic weighted-average common shares outstanding 62.4 62.4 62.4 62.4 Effect of dilutive employee and director awards 0.1 0.1 0.2 0.1 Diluted weighted-average common shares outstanding 62.5 62.5 62.6 62.5 Restricted Cash At December 31, 2021 , the Company had restricted cash of $ 0.5 million, which was invested in an account designated for the purchase of like-kind exchange replacement assets under Section 1031 of the Internal Revenue Code and related IRS procedures (Section 1031). The Company was restricted from utilizing the cash for purposes other than the purchase of the qualified assets for a designated period from receipt of the proceeds from the sale of the exchanged property. There was no restricted cash at June 30, 2022. In connection with Accounting Standards Update 2016-18, Statement of Cash Flows (Topic 230), the statement of cash flows reflects cash flow changes and balances for cash, cash equivalents and restricted cash on an aggregated basis. The following table reconciles cash, cash equivalents and restricted cash as reported on the consolidated balance sheets to the aggregated amounts presented on the consolidated statements of cash flows: June 30, December 31, 2022 2021 (Dollars in Millions) Cash and cash equivalents $ 772.1 $ 258.4 Restricted cash — 0.5 Total cash, cash equivalents and restricted cash presented in $ 772.1 $ 258.9

Revenue Recognition

Revenue Recognition	6 Months Ended
Revenue Recognition	Jun. 30, 2022
Revenue from Contract with Customer [Abstract]
Revenue Recognition	2. Revenue Recognition Total revenues include sales of products and services to customers, net of any discounts or allowances, and freight revenues. Product revenues are recognized when control of the promised good is transferred to the customer, typically when finished products are shipped. Intersegment and interproduct revenues are eliminated in consolidation. Service revenues are derived from the paving business and are recognized using the percentage-of-completion method under the cost-to-cost approach. Freight revenues reflect delivery arranged by the Company using a third party on behalf of the customer and are recognized consistently with the timing of the product revenues. Performance Obligations. Performance obligations are contractual promises to transfer or provide a distinct good or service for a stated price. The Company’s product sales agreements are single-performance obligations that are satisfied at a point in time. Performance obligations within paving service agreements are satisfied over time, primarily ranging from one day to two years . For product revenues and freight revenues, customer payment terms are generally 30 days from invoice date. Customer payments for the paving operations are based on a contractual billing schedule and are due 30 days from invoice date. Future revenues from unsatisfied performance obligations at June 30, 2022 and 2021 were $ 322.5 million and $ 215.5 million, respectively, where the remaining periods to complete these obligations ranged from one month to 23 months and one month to 21 months, respectively. Revenue by Category. The following table presents the Company’s total revenues by category for each reportable segment. Three Months Ended June 30, 2022 Products and Services Freight Total (Dollars in Millions) East Group $ 632.4 $ 42.1 $ 674.5 West Group 816.8 68.7 885.5 Total Building Materials business 1,449.2 110.8 1,560.0 Magnesia Specialties 74.6 7.1 81.7 Total $ 1,523.8 $ 117.9 $ 1,641.7 Three Months Ended June 30, 2021 Products and Services Freight Total (Dollars in Millions) East Group $ 596.5 $ 38.8 $ 635.3 West Group 628.8 38.0 666.8 Total Building Materials business 1,225.3 76.8 1,302.1 Magnesia Specialties 70.0 5.8 75.8 Total $ 1,295.3 $ 82.6 $ 1,377.9 Service revenues, which include paving services located in California and Colorado, were $ 95.0 million and $ 73.4 million for the three months ended June 30, 2022 and 2021, respectively, and are reported in the West Group. Six Months Ended June 30, 2022 Products and Services Freight Total (Dollars in Millions) East Group $ 1,027.0 $ 66.3 $ 1,093.3 West Group 1,499.2 121.3 1,620.5 Total Building Materials business 2,526.2 187.6 2,713.8 Magnesia Specialties 145.4 13.3 158.7 Total $ 2,671.6 $ 200.9 $ 2,872.5 Six Months Ended June 30, 2021 Products and Services Freight Total (Dollars in Millions) East Group $ 969.1 $ 61.1 $ 1,030.2 West Group 1,112.9 70.5 1,183.4 Total Building Materials business 2,082.0 131.6 2,213.6 Magnesia Specialties 135.2 11.5 146.7 Total $ 2,217.2 $ 143.1 $ 2,360.3 Service revenues for the six months ended June 30, 2022 and 2021 were $ 113.3 million and $ 82.2 million, respectively. Contract Balances. Costs in excess of billings relate to the conditional right to consideration for completed contractual performance and are contract assets on the consolidated balance sheets. Costs in excess of billings are reclassified to accounts receivable when the right to consideration becomes unconditional. Billings in excess of costs relate to customers invoiced in advance of contractual performance and are contract liabilities on the consolidated balance sheets. The following table presents information about the Company’s contract balances: (Dollars in Millions) June 30, 2022 December 31, 2021 Costs in excess of billings $ 14.3 $ 4.3 Billings in excess of costs $ 5.6 $ 7.8 Revenues recognized from the beginning balance of contract liabilities for the three months ended June 30, 2022 and 2021 were $ 4.5 million and $ 5.4 million, respectively, and for the six months ended June 30, 2022 and 2021 were $ 6.6 million and $ 9.4 million, respectively. Retainage, which primarily relates to the paving services, represents amounts that have been billed to customers but payment withheld until final acceptance by the customer of the performance obligation. Retainage, which is included in other current assets on the Company’s consolidated balance sheets, was $ 10.6 million and $ 10.5 million at June 30, 2022 and December 31, 2021, respectively. Policy Elections. When the Company arranges third-party freight to deliver products to customers, the Company has elected the delivery to be a fulfillment activity rather than a separate performance obligation. Further, the Company acts as a principal in the delivery arrangements and, as required by the accounting standard, the related revenues and costs are presented gross and are included in the consolidated statements of earnings.

Business , Divestitures Combina

Business , Divestitures Combinations and Discontinued Operations	6 Months Ended
	Jun. 30, 2022
Business Combinations [Abstract]
Business Combinations, Divestitures And Discontinued Operations	3. Business Combinations, Divestitures and Discontinued Operations Business Combinations In October 2021 , the Company completed the acquisition of Lehigh Hanson, Inc.’s West Region business (Lehigh West Region) for $ 2.26 billion. The acquisition was primarily financed using proceeds from the issuance of publicly traded debt. These operations provided a new upstream, materials-led growth platform across several of the nation’s largest and fastest-growing megaregions in California and Arizona. The results from the acquired business are included in the Company’s West Group. The Company determined fair values of assets acquired and liabilities assumed. Although the initial accounting for the business combination has been recorded, these amounts are subject to change during the measurement period, which extends no longer than one year from the consummation date, based on additional reviews, such as asset verification. During the quarter ended June 30, 2022, the Company increased the assumed asset retirement obligations liability by $ 46.6 million, with goodwill increasing by a comparable amount. As of June 30, 2022, the measurement period remains open. Specific accounts subject to ongoing purchase accounting adjustments include, but are not limited to, property, plant and equipment; lease assets and liabilities; goodwill; intangible assets; asset retirement obligations; and other liabilities. Amortization of the goodwill generated by the transaction is deductible for income tax purposes. The following is a summary of the preliminary estimated fair values of the assets acquired and liabilities assumed as of October 1, 2021 (dollars in millions): Assets: Inventories $ 91.9 Property, plant and equipment 849.9 Intangible assets, other than goodwill 551.0 Goodwill 1,041.8 Other assets 54.6 Total assets 2,589.2 Liabilities: Asset retirement obligations 225.5 Operating and finance lease liabilities 57.5 Other liabilities 41.6 Total liabilities 324.6 Total consideration $ 2,264.6 In July 2021 , the Company acquired assets of Southern Crushed Concrete (SCC) in the Houston area. SCC was a leading producer of recycled concrete, which is principally used as a base aggregates product in infrastructure, commercial and residential construction applications. Although the initial accounting for the business combination has been recorded, the fair values of accrued liabilities, goodwill and intangible assets are subject to change during the measurement period, which remains open as of June 30, 2022. Amortization of the goodwill generated by the transaction is deductible for income tax purposes. The results from the acquired business are included in the Company’s West Group, but are immaterial for pro-forma financial statement disclosures. In April 2021 , the Company completed the acquisition of Tiller Corporation (Tiller), a leading aggregates and hot mix asphalt supplier in the Minneapolis/St. Paul area, which is one of the largest and fastest-growing midwestern metropolitan areas. The Tiller acquisition complemented the Company’s existing product offerings in the surrounding areas. The Company determined fair values of the assets acquired and liabilities assumed, and the measurement period is closed as of June 30, 2022. Amortization of the goodwill generated by the transaction is deductible for income tax purposes. The results from the acquired business are included in the Company’s East Group, but are immaterial for pro-forma financial statement disclosures. Discontinued Operations Discontinued operations include the cement and California ready-mixed concrete businesses acquired as part of the Lehigh West Region acquisition. Discontinued operations include the following: Three Months Ended Six Months Ended June 30, 2022 (Dollars in Millions) Total revenues $ 111.7 $ 206.4 Pretax earnings from operations $ 20.5 $ 16.4 Pretax loss on divestiture ( 1.0 ) ( 1.0 ) Pretax earnings $ 19.5 $ 15.4 Income tax expense 6.2 5.2 Earnings from discontinued operations, net of income tax expense $ 13.3 $ 10.2 Total cash provided by operating and investing activities for the discontinued operations was $ 224.2 million, including $ 235.0 million of proceeds from divestitures and $ 13.2 million of cash used for capital expenditures, for the six months ended June 30, 2022. Non-cash items related to operating and investing activities for the discontinued operations were immaterial for the six months ended June 30, 2022. Divestitures On June 30, 2022, the Company completed the sale of the Redding, California cement plant, related cement distribution terminals and 14 California ready mix operations for $ 235 million in cash. In addition, the Company agreed to sell its interest, for $ 15 million, in a joint venture that operates a cement distribution terminal. The Company did no t record any amortization or depreciation expense related to these businesses for the three and six months ended June 30, 2022, as these were previously classified as assets held for sale. On April 1, 2022, the Company divested its Colorado and Central Texas ready-mixed concrete operations to Smyrna Ready Mix Concrete LLC. This opportunity optimized the Company’s aggregates-led portfolio and improved its ability to generate more attractive margins over the long term by reducing both business cyclicality and exposure to raw material cost inflation. The transaction resulted in a pretax gain of $ 151.7 million, which is included in O ther operating income, net , and is inclusive of expenses incurred due to the divestiture. The divested operations and the gain on divestiture are all reported in the West Group. Assets Held for Sale Assets and liabilities held for sale as of June 30, 2022, include a cement plant in Tehachapi, California; cement distribution terminals; the California ready mixed concrete plants not sold as part of the aforementioned Redding transaction; and certain investment properties. At December 31, 2021 assets and liabilities held for sale also included the operations that were sold on June 30, 2022. Assets and liabilities held for sale as of June 30, 2022 and December 31, 2021 are as follows: June 30, 2022 December 31, 2021 Continuing Operations Discontinued Operations Total Continuing Operations Discontinued Operations Total (Dollars in Millions) Inventories, net $ — $ 19.5 $ 19.5 $ — $ 53.1 $ 53.1 Investment land 38.0 — 38.0 32.7 — 32.7 Other assets — — — — 16.4 16.4 Total current assets held for sale $ 38.0 $ 19.5 $ 57.5 $ 32.7 $ 69.5 $ 102.2 Property, plant and equipment $ — $ 130.0 $ 130.0 $ — $ 226.0 $ 226.0 Intangible assets, excluding goodwill — 208.5 208.5 — 264.9 264.9 Operating lease right-of-use assets — 14.0 14.0 — 18.1 18.1 Goodwill — 35.7 35.7 — 109.3 109.3 Other assets — 5.4 5.4 — 4.6 4.6 Valuation allowance for loss on sale — ( 5.4 ) ( 5.4 ) — ( 6.0 ) ( 6.0 ) Total noncurrent assets held for sale $ — $ 388.2 $ 388.2 $ — $ 616.9 $ 616.9 Lease obligations $ — $ ( 5.2 ) $ ( 5.2 ) $ — $ ( 7.5 ) $ ( 7.5 ) Total current liabilities held for sale $ — $ ( 5.2 ) $ ( 5.2 ) $ — $ ( 7.5 ) $ ( 7.5 ) Asset retirement obligations $ — $ ( 19.8 ) $ ( 19.8 ) $ — $ ( 31.5 ) $ ( 31.5 ) Lease obligations — ( 8.5 ) ( 8.5 ) — ( 22.0 ) ( 22.0 ) Other liabilities — ( 0.8 ) ( 0.8 ) — — — Total noncurrent liabilities held for sale $ — $ ( 29.1 ) $ ( 29.1 ) $ — $ ( 53.5 ) $ ( 53.5 )

Goodwill

Goodwill	6 Months Ended
Goodwill	Jun. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	4. Goodwill The following table shows the changes in goodwill by reportable segment and in total: East West Group Group Total (Dollars in Millions) Balance at January 1, 2022 $ 759.4 $ 2,735.0 $ 3,494.4 Acquisitions — 3.7 3.7 Adjustments to purchase price allocations 5.0 52.8 57.8 Divestitures — ( 159.7 ) ( 159.7 ) Goodwill reclassified from assets held for sale — 4.3 4.3 Balance at June 30, 2022 $ 764.4 $ 2,636.1 $ 3,400.5

Inventories, Net

Inventories, Net	6 Months Ended
Inventories, Net	Jun. 30, 2022
Inventory Disclosure [Abstract]
Inventories, Net	5. Inventories, Net June 30, December 31, 2022 2021 (Dollars in Millions) Finished products $ 859.8 $ 713.3 Products in process 9.1 30.1 Raw materials 96.7 69.6 Supplies and expendable parts 139.6 153.9 1,105.2 966.9 Less: Allowances ( 270.0 ) ( 214.3 ) Total $ 835.2 $ 752.6

Long-Term Debt

Long-Term Debt	6 Months Ended
Long-Term Debt	Jun. 30, 2022
Debt Disclosure [Abstract]
Long-Term Debt	6. Long-Term Debt June 30, December 31, 2022 2021 (Dollars in Millions) 0.650 % Senior Notes, due 2023 $ 698.3 $ 697.4 4.250 % Senior Notes, due 2024 398.6 398.3 7 % Debentures, due 2025 124.6 124.6 3.450 % Senior Notes, due 2027 298.1 297.9 3.500 % Senior Notes, due 2027 496.7 496.4 2.500 % Senior Notes, due 2030 471.8 491.1 2.400 % Senior Notes, due 2031 888.2 891.8 6.25 % Senior Notes, due 2037 228.3 228.3 4.250 % Senior Notes, due 2047 590.1 592.1 3.200 % Senior Notes, due 2051 849.6 882.9 Other notes — 0.1 Total debt 5,044.3 5,100.9 Less: Current maturities — ( 0.1 ) Long-term debt $ 5,044.3 $ 5,100.8 During the six months ended June 30, 2022 , the Company repurchased $ 60.5 million (par value) of its Senior Notes. The Company, through a wholly-owned special-purpose subsidiary, has a $ 400 million trade receivable securitization facility (the Trade Receivable Facility) that matures on September 21, 2022 . The Trade Receivable Facility, with Truist Bank, Regions Bank, PNC Bank, N.A., MUFG Bank, Ltd., New York Branch, and certain other lenders that may become a party to the facility from time to time, is backed by eligible trade receivables, as defined, and is limited to the lesser of the facility limit or the borrowing base, as defined. These receivables are originated by the Company and then sold by the Company to the wholly-owned special-purpose subsidiary. The Company continues to be responsible for the servicing and administration of the receivables purchased by the wholly-owned special-purpose subsidiary. Borrowings under the Trade Receivable Facility bear interest at a rate equal to asset-backed commercial paper costs of conduit lenders plus 0.85 % for borrowings funded by conduit lenders and one-month London Inter-bank Offered Rate (LIBOR) plus 1.00 %, subject to change in the event that this rate no longer reflects the lender’s cost of lending, for borrowings funded by all other lenders. The Trade Receivable Facility contains a cross-default provision to the Company’s other debt agreements. Subject to certain conditions, including lenders providing the requisite commitments, the Trade Receivable Facility may be increased to a borrowing base not to exceed $ 500 million. There were no borrowings outstanding under the Trade Receivable Facility at June 30, 2022 and December 31, 2021. The Company has a $ 800 million five-year senior unsecured revolving facility (the Revolving Facility) with JPMorgan Chase Bank, N.A., as Administrative Agent, Deutsche Bank Securities, Inc., PNC Bank, Truist Bank and Wells Fargo Bank, N.A., as Syndication Agents, and the lenders party thereto (the Credit Agreement). Borrowings under the Revolving Facility bear interest, at the Company’s option, at rates based upon LIBOR or a base rate, plus, for each rate, a margin determined in accordance with a ratings-based pricing grid. There were no borrowings outstanding under the Credit Agreement at June 30, 2022 or December 31, 2021 . The Credit Agreement requires the Company’s ratio of consolidated net debt-to-consolidated earnings before interest, taxes, depreciation, depletion and amortization (EBITDA), as defined by the Revolving Facility, for the trailing-twelve months (the Ratio) to not exceed 3.50 times as of the end of any fiscal quarter, provided that the Company may exclude from the Ratio debt incurred in connection with certain acquisitions during such quarter or the three preceding quarters so long as the Ratio calculated without such exclusion does not exceed 4.00 times. Additionally, if there are no amounts outstanding under both the Revolving Facility and the Trade Receivable Facility, consolidated debt, including debt for which the Company is a guarantor (see Note 10), may be reduced in an amount equal to the lesser of $ 500 million or the sum of the Company’s unrestricted cash and temporary investments, for purposes of the covenant calculation. The Company was in compliance with this covenant at June 30, 2022. The Revolving Facility expires on December 21, 2026 , with any outstanding principal amounts, together with interest accrued thereon, due in full on that date. Available borrowings under the Revolving Facility are reduced by any outstanding letters of credit issued by the Company under the Revolving Facility. The Company had $ 2.6 million of outstanding letters of credit issued under the Revolving Facility at June 30, 2022 and December 31, 2021 .

Financial Instruments

Financial Instruments	6 Months Ended
Financial Instruments	Jun. 30, 2022
Financial Instruments Disclosure [Abstract]
Financial Instruments	7. Financial Instruments The Company’s financial instruments include temporary cash investments, restricted cash, accounts receivable, notes receivable, accounts payable, publicly-registered long-term notes, debentures and other long-term debt. Temporary cash investments are placed primarily in money market funds, money market demand deposit accounts and Eurodollar time deposits. The Company’s cash equivalents have original maturities of less than three months. Due to the short maturity of these investments, they are carried on the consolidated balance sheets at cost, which approximates fair value. Restricted cash is held in a trust account with a third-party intermediary. Due to the short-term nature of this account, the fair value of restricted cash approximates its carrying value. Accounts receivable are due from a large number of customers, primarily in the construction industry, and are dispersed across wide geographic and economic regions. No single customer accounted for 10 % or more of consolidated accounts receivable in the six-month periods ended June 30, 2022 and 2021. The estimated fair values of accounts receivable approximate their carrying amounts due to the short-term nature of the accounts. Notes receivable are primarily promissory notes with customers and are not publicly traded. Management estimates that the fair value of notes receivable approximates its carrying amount. Accounts payable represent amounts owed to suppliers and vendors. The estimated fair value of accounts payable approximates the carrying amount due to the short-term nature of the payables. The carrying values and fair values of the Company’s long-term debt were $ 5.04 billion and $ 4.48 billion, respectively, at June 30, 2022 and $ 5.10 billion and $ 5.45 billion, respectively, at December 31, 2021 . The estimated fair value of the publicly-registered long-term notes was estimated using quoted market prices. The estimated fair values of other borrowings approximate their carrying amounts as the interest rates reset periodically.

Income Taxes

Income Taxes	6 Months Ended
Income Taxes	Jun. 30, 2022
Income Tax Disclosure [Abstract]
Income Taxes	8. Income Taxes The effective income tax rate reflects the effect of federal and state income taxes on earnings and the impact of differences in book and tax accounting arising primarily from the permanent tax benefits associated with the statutory depletion deduction for mineral reserves. The effective income tax rates for continuing operations were 22.6 % and 21.2 % for the six months ended June 30, 2022 and 2021, respectively. The higher 2022 effective income tax rate versus 2021 was driven by the impact of the divestiture of the Colorado and Central Texas ready mixed concrete businesses. The Company records interest accrued in relation to unrecognized tax benefits as income tax expense. Penalties, if incurred, are recorded as operating expenses in the consolidated statements of earnings and comprehensive earnings.

Pension and Postretirement Bene

Pension and Postretirement Benefits	6 Months Ended
Pension and Postretirement Benefits	Jun. 30, 2022
Retirement Benefits [Abstract]
Pension and Postretirement Benefits	9. Pension and Postretirement Benefits During the six months ended June 30, 2022, the Company amended its qualified pension plan and provided an enhanced benefit for eligible hourly active participants who retire subsequent to April 30, 2022. The amendment required a pension remeasurement. The Company elected the use of a practical expedient to perform the pension remeasurement as of February 28, 2022, the month-end closest to the approval of the plan amendment. The discount rate for the remeasurement was 3.75 % compared with 3.23 % prior to the remeasurement. The enhanced benefit and remeasurement resulted in higher pension expense for the year compared with the initial estimate of the annual pension expense for the qualified plan. The estimated components of the recorded net periodic benefit cost (credit) for pension and postretirement benefits are as follows: Pension Postretirement Benefits Three Months Ended June 30, 2022 2021 2022 2021 (Dollars in Millions) Service cost $ 14.0 $ 10.6 $ — $ — Interest cost 11.9 8.3 0.1 0.1 Expected return on assets ( 22.5 ) ( 16.3 ) — — Amortization of: Prior service cost (credit) 1.4 0.3 ( 0.2 ) ( 0.2 ) Actuarial loss (gain) 1.2 2.8 ( 0.1 ) — Net periodic benefit cost (credit) $ 6.0 $ 5.7 $ ( 0.2 ) $ ( 0.1 ) Pension Postretirement Benefits Six Months Ended June 30, 2022 2021 2022 2021 (Dollars in Millions) Service cost $ 24.0 $ 23.0 $ — $ — Interest cost 20.6 17.7 0.2 0.2 Expected return on assets ( 38.7 ) ( 35.1 ) — — Amortization of: Prior service cost (credit) 2.5 0.4 ( 0.4 ) ( 0.4 ) Actuarial loss (gain) 2.0 6.2 ( 0.1 ) ( 0.1 ) Net periodic benefit cost (credit) $ 10.4 $ 12.2 $ ( 0.3 ) $ ( 0.3 ) The service cost component of net periodic benefit (credit) cost is included in Cost of revenues – products and services and Selling, general & administrative expenses . All other components are included in Other nonoperating income, net , in the consolidated statements of earnings and comprehensive earnings.

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
Commitments and Contingencies	Jun. 30, 2022
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	10. Commitments and Contingencies L egal and Administrative Proceedings The Company is engaged in certain legal and administrative proceedings incidental to its normal business activities, including matters relating to environmental protection. The Company considers various factors in assessing the probable outcome of each matter, including but not limited to the nature of existing legal proceedings and claims, the asserted or possible damages, the jurisdiction and venue of the case and whether it is a jury trial, the progress of the case, existing law and precedent, the opinions or views of legal counsel and other advisers, the Company’s experience in similar cases and the experience of other companies, the facts available to the Company at the time of assessment, and how the Company intends to respond to the proceeding or claim. The Company’s assessment of these factors may change over time as proceedings or claims progress. The Company believes the probability is remote that the outcome of any currently pending legal or administrative proceeding will result in a material loss to the Company as a whole, based on currently available facts. Borrowing Arrangements with Affiliate The Company is a guarantor with an unconsolidated affiliate for a $ 15.0 million revolving line of credit agreement with Truist Bank, of which $ 3.7 million was outstanding as of June 30, 2022 , and that has a maturity date of March 2024 . The affiliate has agreed to reimburse and indemnify the Company for any payments and expenses the Company may incur from this agreement. The Company holds a lien on the affiliate’s membership interest in a joint venture as collateral for payment under the revolving line of credit. In addition, the Company has a $ 6.0 million interest-only loan receivable, due December 31, 2024 , outstanding from this unconsolidated affiliate as of June 30, 2022 and December 31, 2021 . The interest rate is one-month LIBOR plus a current spread of 1.63 %. Letters of Credit In the normal course of business, the Company provides certain third parties with standby letter of credit agreements guaranteeing payment for certain insurance claims, contract performance and permit requirements. At June 30, 2022 , the Company was contingently liable for $ 17.2 million in letters of credit, of which $ 2.6 million were issued under the Company’s Revolving Facility.

Business Segments

Business Segments	6 Months Ended
Business Segments	Jun. 30, 2022
Segment Reporting [Abstract]
Business Segments	11. Business Segments The Building Materials business contains two reportable segments: the East Group and the West Group. The Company also has a Magnesia Specialties segment. The Company’s evaluation of performance and allocation of resources are based primarily on earnings from operations. Consolidated earnings from operations include total revenues less cost of revenues; selling, general and administrative expenses; acquisition and integration expenses; other operating income and expenses, net; and exclude interest expense; other nonoperating income and expenses, net; and income taxes. Corporate loss from operations primarily includes depreciation; expenses for corporate administrative functions; acquisition and integration expenses; and other nonrecurring income and expenses not reported in one of the operating segments. All long-term debt and related interest expense are held at Corporate. The following table displays selected financial data for the Company’s reportable segments. Total revenues, as well as the consolidated statements of earnings and comprehensive earnings, exclude intersegment revenues, which represent sales from one segment to another segment and are eliminated in consolidation. Total revenues, product and services revenues, and earnings (loss) from operations reflect continuing operations only. In 2022, earnings from operations for the West Group include nonrecurring gains on divested assets of $ 151.7 million. Three Months Ended Six Months Ended June 30, June 30, 2022 2021 2022 2021 (Dollars in Millions) Total revenues: East Group $ 674.5 $ 635.3 $ 1,093.3 $ 1,030.2 West Group 885.5 666.8 1,620.5 1,183.4 Total Building Materials business 1,560.0 1,302.1 2,713.8 2,213.6 Magnesia Specialties 81.7 75.8 158.7 146.7 Total $ 1,641.7 $ 1,377.9 $ 2,872.5 $ 2,360.3 Products and services revenues: East Group $ 632.4 $ 596.5 $ 1,027.0 $ 969.1 West Group 816.8 628.8 1,499.2 1,112.9 Total Building Materials business 1,449.2 1,225.3 2,526.2 2,082.0 Magnesia Specialties 74.6 70.0 145.4 135.2 Total $ 1,523.8 $ 1,295.3 $ 2,671.6 $ 2,217.2 Earnings (Loss) from operations: East Group $ 210.6 $ 197.8 $ 238.5 $ 259.5 West Group 274.5 101.8 317.6 133.6 Total Building Materials business 485.1 299.6 556.1 393.1 Magnesia Specialties 20.3 23.1 41.8 46.7 Corporate ( 26.8 ) ( 15.2 ) ( 59.5 ) ( 33.0 ) Total $ 478.6 $ 307.5 $ 538.4 $ 406.8

Revenues and Gross Profit

Revenues and Gross Profit	6 Months Ended
Revenues and Gross Profit	Jun. 30, 2022
Revenues And Gross Profit [Abstract]
Revenues and Gross Profit	12. Revenues and Gross Profit The Building Materials business includes the aggregates, cement, ready mixed concrete and asphalt and paving product lines. Cement and ready mixed concrete product lines and paving services reside only in the West Group. The following table, which is reconciled to consolidated amounts, provides total revenues and gross profit (loss) by product line and reflects continuing operations only. Three Months Ended Six Months Ended June 30, June 30, 2022 2021 2022 2021 (Dollars in Millions) Total revenues: Building Materials business: Products and services: Aggregates $ 955.2 $ 801.8 $ 1,641.1 $ 1,374.4 Cement 157.9 116.5 292.2 226.1 Ready mixed concrete 226.1 268.4 516.2 503.7 Asphalt and paving services 212.3 135.3 267.1 147.6 Less: interproduct revenues ( 102.3 ) ( 96.7 ) ( 190.4 ) ( 169.8 ) Products and services 1,449.2 1,225.3 2,526.2 2,082.0 Freight 110.8 76.8 187.6 131.6 Total Building Materials business 1,560.0 1,302.1 2,713.8 2,213.6 Magnesia Specialties: Products and services 74.6 70.0 145.4 135.2 Freight 7.1 5.8 13.3 11.5 Total Magnesia Specialties 81.7 75.8 158.7 146.7 Total $ 1,641.7 $ 1,377.9 $ 2,872.5 $ 2,360.3 Gross profit (loss): Building Materials business: Products and services: Aggregates $ 309.0 $ 273.0 $ 410.9 $ 394.7 Cement 51.1 36.1 78.5 51.4 Ready mixed concrete 14.3 19.1 35.4 38.6 Asphalt and paving services 26.4 28.7 13.1 20.4 Products and services 400.8 356.9 537.9 505.1 Freight ( 1.7 ) 0.7 ( 0.4 ) 0.5 Total Building Materials business 399.1 357.6 537.5 505.6 Magnesia Specialties: Products and services 25.8 27.9 52.6 56.3 Freight ( 1.3 ) ( 0.9 ) ( 2.4 ) ( 1.9 ) Total Magnesia Specialties 24.5 27.0 50.2 54.4 Corporate 1.6 0.5 ( 6.4 ) ( 0.2 ) Total $ 425.2 $ 385.1 $ 581.3 $ 559.8

Supplemental Cash Flow Informat

Supplemental Cash Flow Information	6 Months Ended
Supplemental Cash Flow Information	Jun. 30, 2022
Supplemental Cash Flow Elements [Abstract]
Supplemental Cash Flow Information	13. Supplemental Cash Flow Information Noncash investing and financing activities are as follows: Six Months Ended June 30, 2022 2021 (Dollars in Millions) Noncash investing and financing activities: Right-of-use assets obtained in exchange for $ 7.0 $ 158.8 Right-of-use assets obtained in exchange for new $ 13.0 $ 13.2 Accrued liabilities for purchases of property, plant and equipment $ 27.3 $ 29.5 Remeasurement of operating lease right-of-use assets $ ( 3.5 ) $ ( 6.3 ) Remeasurement of finance lease right-of-use assets $ ( 6.4 ) $ — For the six months ended June 30, 2021, the right-of-use assets obtained in exchange for new finance lease liabilities balance were primarily attributable to the lease of the new corporate headquarters, production equipment, and leases assumed as part of the Tiller acquisition. Supplemental disclosures of cash flow information are as follows: Six Months Ended June 30, 2022 2021 (Dollars in Millions) Cash paid for interest, net of capitalized amount $ 84.3 $ 53.6 Cash paid for income taxes, net of refunds $ 42.9 $ 56.9 During the six months ended June 30, 2021, the Company received proceeds of $ 11.2 million, related to its company-owned life insurance policies. The proceeds are included in the Investments in life insurance contracts, net , in the investing activities of the consolidated statements of cash flows.

Other Operating Income, Net

Other Operating Income, Net	6 Months Ended
Other Operating Income, Net	Jun. 30, 2022
Other Income and Expenses [Abstract]
Other Operating Income, Net	Other Operating Income, Net For the three and six months ended June 30, 2022, the increase in other operating income, net, was primarily attributable to the $ 151.7 million gain on the divestiture of the Colorado and Central Texas ready-mixed concrete operations. Other operating income, net, for the three and six months ended June 30, 2021 included a $ 12.3 million gain on the sale of the Company’s former corporate headquarters.

Other Nonoperating Income, Net

Other Nonoperating Income, Net	6 Months Ended
Other Nonoperating Income, Net	Jun. 30, 2022
Other Income and Expenses [Abstract]
Other Nonoperating Income, Net	15. Other Nonoperating Income, Net Other nonoperating income, net, for the three months and six months ended June 30, 2022 included an $ 11.6 million pretax gain related to the repurchase of the Company’s debt.

Significant Accounting Polici_2

Significant Accounting Policies (Policies)	6 Months Ended
Significant Accounting Policies (Policies)	Jun. 30, 2022
Accounting Policies [Abstract]
Organization	Organization Martin Marietta Materials, Inc. (the Company or Martin Marietta) is a natural resource-based building materials company. As of June 30, 2022 , the Company supplies aggregates (crushed stone, sand and gravel) through its network of approximately 350 quarries, mines and distribution yards in 28 states, Canada and The Bahamas. Martin Marietta also provides cement and downstream products and services, namely, ready mixed concrete, asphalt and paving, in vertically-integrated structured markets where the Company has a leading aggregates position. In addition, the Company has one cement plant, cement distribution terminals and ready mixed concrete operations in California that are classified as assets held for sale and discontinued operations as of and for the six months ended June 30, 2022. The Company’s heavy-side building materials are used in infrastructure, nonresidential and residential construction projects. Aggregates are also used in agricultural, utility and environmental applications and as railroad ballast. The aggregates, cement, ready mixed concrete, asphalt and paving product lines are reported collectively as the “Building Materials” business. The Company’s Building Materials business includes two reportable segments: the East Group and the West Group. BUILDING MATERIALS BUSINESS Reportable Segments East Group West Group Operating Locations Alabama, Florida, Georgia, Indiana, Arizona, Arkansas, California, Colorado, Louisiana, Oklahoma, Texas, Utah, Product Lines Aggregates and Asphalt Aggregates, Cement, Ready Mixed Concrete, Asphalt and Paving The Company’s Magnesia Specialties business, which represents a separate reportable segment, has manufacturing facilities in Manistee, Michigan, and Woodville, Ohio. The Magnesia Specialties business produces magnesia-based chemicals products used in industrial, agricultural and environmental applications, and dolomitic lime sold primarily to customers in the steel and mining industries.
Basis of Presentation	Basis of Presentation The accompanying unaudited consolidated financial statements of the Company have been prepared in accordance with accounting principles generally accepted in the United States (U.S. GAAP) for interim financial information and with the instructions to the Quarterly Report on Form 10-Q and in Article 10 of Regulation S-X. The Company has continued to follow the accounting policies set forth in the audited consolidated financial statements and related notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2021. In the opinion of management, the interim consolidated financial information provided herein reflects all adjustments, consisting of normal recurring accruals, necessary for a fair statement of the results of operations, financial position and cash flows for the interim periods. The consolidated results of operations for the three and six months ended June 30, 2022 are not necessarily indicative of the results expected for other interim periods or the full year. The consolidated balance sheet at December 31, 2021 has been derived from the audited consolidated financial statements at that date but does not include all of the information and notes required by U.S. GAAP for complete financial statements. These consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2021. The preparation of the Company’s consolidated financial statements requires management to make certain estimates and assumptions about future events. As future events and their effects cannot be fully determined with precision, actual results could differ significantly from estimates. Changes in estimates are reflected in the consolidated financial statements in the period in which the change in estimate occurs.
Consolidated Comprehensive (Loss) Earnings and Accumulated Other Comprehensive Loss	Consolidated Comprehensive Earnings (Loss) and Accumulated Other Comprehensive Loss Consolidated comprehensive earnings (loss) and accumulated other comprehensive loss consist of consolidated net earnings; adjustments for the funded status of pension and postretirement benefit plans; and foreign currency translation adjustments; and are presented in the Company’s consolidated statements of earnings and comprehensive earnings. Comprehensive earnings (loss) attributable to Martin Marietta is as follows: Three Months Ended Six Months Ended June 30, June 30, 2022 2021 2022 2021 (Dollars in Millions) Net earnings attributable to Martin Marietta $ 366.5 $ 225.8 $ 387.9 $ 291.1 Other comprehensive earnings (loss), net of tax 1.2 2.6 ( 30.5 ) 5.4 Comprehensive earnings attributable to $ 367.7 $ 228.4 $ 357.4 $ 296.5 Changes in accumulated other comprehensive loss, net of tax, are as follows: (Dollars in Millions) Pension and Foreign Currency Accumulated Three Months Ended June 30, 2022 Balance at beginning of period $ ( 129.7 ) $ 0.4 $ ( 129.3 ) Other comprehensive earnings (loss) before reclassifications, 0.4 ( 0.9 ) ( 0.5 ) Amounts reclassified from accumulated other 1.7 — 1.7 Other comprehensive earnings (loss), net of tax 2.1 ( 0.9 ) 1.2 Balance at end of period $ ( 127.6 ) $ ( 0.5 ) $ ( 128.1 ) Three Months Ended June 30, 2021 Balance at beginning of period $ ( 155.6 ) $ — $ ( 155.6 ) Other comprehensive earnings before reclassifications, — 0.5 0.5 Amounts reclassified from accumulated other 2.1 — 2.1 Other comprehensive earnings, net of tax 2.1 0.5 2.6 Balance at end of period $ ( 153.5 ) $ 0.5 $ ( 153.0 ) (Dollars in Millions) Pension and Foreign Currency Accumulated Six Months Ended June 30, 2022 Balance at beginning of period $ ( 97.6 ) $ — $ ( 97.6 ) Other comprehensive loss before reclassifications, ( 33.0 ) ( 0.5 ) ( 33.5 ) Amounts reclassified from accumulated other 3.0 — 3.0 Other comprehensive loss, net of tax ( 30.0 ) ( 0.5 ) ( 30.5 ) Balance at end of period $ ( 127.6 ) $ ( 0.5 ) $ ( 128.1 ) Six Months Ended June 30, 2021 Balance at beginning of period $ ( 158.1 ) $ ( 0.3 ) $ ( 158.4 ) Other comprehensive earnings before reclassifications, — 0.8 0.8 Amounts reclassified from accumulated other 4.6 — 4.6 Other comprehensive earnings, net of tax 4.6 0.8 5.4 Balance at end of period $ ( 153.5 ) $ 0.5 $ ( 153.0 ) The $ 33.0 million, net of tax, other comprehensive loss before reclassifications in the Pension and Postretirement Benefit Plans for the six months ended June 30, 2022 is driven by the remeasurement of the funded status of the Company’s qualified pension plan, required as a result of a plan amendment that provided an enhanced benefit for eligible hourly employees. Changes in net noncurrent deferred tax assets related to accumulated other comprehensive loss are as follows: Pension and Postretirement Benefit Plans Three Months Ended Six Months Ended June 30, June 30, 2022 2021 2022 2021 (Dollars in Millions) Balance at beginning of period $ 80.2 $ 88.7 $ 69.7 $ 89.4 Tax effect of other comprehensive (earnings) loss ( 0.7 ) ( 0.8 ) 9.8 ( 1.5 ) Balance at end of period $ 79.5 $ 87.9 $ 79.5 $ 87.9 Reclassifications out of accumulated other comprehensive loss are as follows: Three Months Ended Six Months Ended Affected line items in the June 30, June 30, consolidated statements of earnings 2022 2021 2022 2021 and comprehensive earnings (Dollars in Millions) Pension and postretirement Amortization of: Prior service cost $ 1.2 $ 0.1 $ 2.1 $ — Actuarial loss 1.1 2.8 1.9 6.1 2.3 2.9 4.0 6.1 Other nonoperating income, net Tax benefit ( 0.6 ) ( 0.8 ) ( 1.0 ) ( 1.5 ) Income tax expense $ 1.7 $ 2.1 $ 3.0 $ 4.6
Earnings per Common Share	Earnings per Common Share The numerator for basic and diluted earnings per common share is net earnings attributable to Martin Marietta reduced by dividends and undistributed earnings attributable to certain of the Company’s stock-based compensation arrangements. If there is a net loss, no amount of the undistributed loss is attributed to unvested participating securities. The denominator for basic earnings per common share is the weighted-average number of common shares outstanding during the period. Diluted earnings per common share are computed assuming that the weighted-average number of common shares is increased by the conversion, using the treasury stock method, of awards to be issued to employees and nonemployee members of the Company’s Board of Directors under certain stock-based compensation arrangements if the conversion is dilutive. For the three and six months ended June 30, 2022 and 2021 , the diluted per-share computations reflect the number of common shares outstanding to include the number of additional shares that would have been outstanding if the potentially dilutive common shares had been issued. The following table reconciles the numerator and denominator for basic and diluted earnings from continuing operations per common share: Three Months Ended Six Months Ended June 30, June 30, 2022 2021 2022 2021 (In Millions) Net earnings from continuing operations attributable to $ 353.2 $ 225.8 $ 377.7 $ 291.1 Less: Distributed and undistributed earnings — 0.2 — 0.2 Basic and diluted net earnings from continuing operations $ 353.2 $ 225.6 $ 377.7 $ 290.9 Basic weighted-average common shares outstanding 62.4 62.4 62.4 62.4 Effect of dilutive employee and director awards 0.1 0.1 0.2 0.1 Diluted weighted-average common shares outstanding 62.5 62.5 62.6 62.5
Restricted Cash	Restricted Cash At December 31, 2021 , the Company had restricted cash of $ 0.5 million, which was invested in an account designated for the purchase of like-kind exchange replacement assets under Section 1031 of the Internal Revenue Code and related IRS procedures (Section 1031). The Company was restricted from utilizing the cash for purposes other than the purchase of the qualified assets for a designated period from receipt of the proceeds from the sale of the exchanged property. There was no restricted cash at June 30, 2022. In connection with Accounting Standards Update 2016-18, Statement of Cash Flows (Topic 230), the statement of cash flows reflects cash flow changes and balances for cash, cash equivalents and restricted cash on an aggregated basis. The following table reconciles cash, cash equivalents and restricted cash as reported on the consolidated balance sheets to the aggregated amounts presented on the consolidated statements of cash flows: June 30, December 31, 2022 2021 (Dollars in Millions) Cash and cash equivalents $ 772.1 $ 258.4 Restricted cash — 0.5 Total cash, cash equivalents and restricted cash presented in $ 772.1 $ 258.9
Policy Elections	Policy Elections. When the Company arranges third-party freight to deliver products to customers, the Company has elected the delivery to be a fulfillment activity rather than a separate performance obligation. Further, the Company acts as a principal in the delivery arrangements and, as required by the accounting standard, the related revenues and costs are presented gross and are included in the consolidated statements of earnings.

Significant Accounting Polici_3

Significant Accounting Policies (Tables)	6 Months Ended
Significant Accounting Policies (Tables)	Jun. 30, 2022
Significant Accounting Policies [Line Items]
Comprehensive Earnings (Loss)	Comprehensive earnings (loss) attributable to Martin Marietta is as follows: Three Months Ended Six Months Ended June 30, June 30, 2022 2021 2022 2021 (Dollars in Millions) Net earnings attributable to Martin Marietta $ 366.5 $ 225.8 $ 387.9 $ 291.1 Other comprehensive earnings (loss), net of tax 1.2 2.6 ( 30.5 ) 5.4 Comprehensive earnings attributable to $ 367.7 $ 228.4 $ 357.4 $ 296.5
Changes in Accumulated Other Comprehensive Loss Net of Tax	Changes in accumulated other comprehensive loss, net of tax, are as follows: (Dollars in Millions) Pension and Foreign Currency Accumulated Three Months Ended June 30, 2022 Balance at beginning of period $ ( 129.7 ) $ 0.4 $ ( 129.3 ) Other comprehensive earnings (loss) before reclassifications, 0.4 ( 0.9 ) ( 0.5 ) Amounts reclassified from accumulated other 1.7 — 1.7 Other comprehensive earnings (loss), net of tax 2.1 ( 0.9 ) 1.2 Balance at end of period $ ( 127.6 ) $ ( 0.5 ) $ ( 128.1 ) Three Months Ended June 30, 2021 Balance at beginning of period $ ( 155.6 ) $ — $ ( 155.6 ) Other comprehensive earnings before reclassifications, — 0.5 0.5 Amounts reclassified from accumulated other 2.1 — 2.1 Other comprehensive earnings, net of tax 2.1 0.5 2.6 Balance at end of period $ ( 153.5 ) $ 0.5 $ ( 153.0 ) (Dollars in Millions) Pension and Foreign Currency Accumulated Six Months Ended June 30, 2022 Balance at beginning of period $ ( 97.6 ) $ — $ ( 97.6 ) Other comprehensive loss before reclassifications, ( 33.0 ) ( 0.5 ) ( 33.5 ) Amounts reclassified from accumulated other 3.0 — 3.0 Other comprehensive loss, net of tax ( 30.0 ) ( 0.5 ) ( 30.5 ) Balance at end of period $ ( 127.6 ) $ ( 0.5 ) $ ( 128.1 ) Six Months Ended June 30, 2021 Balance at beginning of period $ ( 158.1 ) $ ( 0.3 ) $ ( 158.4 ) Other comprehensive earnings before reclassifications, — 0.8 0.8 Amounts reclassified from accumulated other 4.6 — 4.6 Other comprehensive earnings, net of tax 4.6 0.8 5.4 Balance at end of period $ ( 153.5 ) $ 0.5 $ ( 153.0 )
Noncurrent Deferred Tax Assets Recorded In Accumulated Other Comprehensive Loss	Changes in net noncurrent deferred tax assets related to accumulated other comprehensive loss are as follows: Pension and Postretirement Benefit Plans Three Months Ended Six Months Ended June 30, June 30, 2022 2021 2022 2021 (Dollars in Millions) Balance at beginning of period $ 80.2 $ 88.7 $ 69.7 $ 89.4 Tax effect of other comprehensive (earnings) loss ( 0.7 ) ( 0.8 ) 9.8 ( 1.5 ) Balance at end of period $ 79.5 $ 87.9 $ 79.5 $ 87.9
Reclassification Out of Accumulated Other Comprehensive Loss	Reclassifications out of accumulated other comprehensive loss are as follows: Three Months Ended Six Months Ended Affected line items in the June 30, June 30, consolidated statements of earnings 2022 2021 2022 2021 and comprehensive earnings (Dollars in Millions) Pension and postretirement Amortization of: Prior service cost $ 1.2 $ 0.1 $ 2.1 $ — Actuarial loss 1.1 2.8 1.9 6.1 2.3 2.9 4.0 6.1 Other nonoperating income, net Tax benefit ( 0.6 ) ( 0.8 ) ( 1.0 ) ( 1.5 ) Income tax expense $ 1.7 $ 2.1 $ 3.0 $ 4.6
Basic and Diluted Earnings from Continuing Operations Per Common Share	The following table reconciles the numerator and denominator for basic and diluted earnings from continuing operations per common share: Three Months Ended Six Months Ended June 30, June 30, 2022 2021 2022 2021 (In Millions) Net earnings from continuing operations attributable to $ 353.2 $ 225.8 $ 377.7 $ 291.1 Less: Distributed and undistributed earnings — 0.2 — 0.2 Basic and diluted net earnings from continuing operations $ 353.2 $ 225.6 $ 377.7 $ 290.9 Basic weighted-average common shares outstanding 62.4 62.4 62.4 62.4 Effect of dilutive employee and director awards 0.1 0.1 0.2 0.1 Diluted weighted-average common shares outstanding 62.5 62.5 62.6 62.5
Reconciliation of Cash, Cash Equivalents and Restricted Cash	The following table reconciles cash, cash equivalents and restricted cash as reported on the consolidated balance sheets to the aggregated amounts presented on the consolidated statements of cash flows: June 30, December 31, 2022 2021 (Dollars in Millions) Cash and cash equivalents $ 772.1 $ 258.4 Restricted cash — 0.5 Total cash, cash equivalents and restricted cash presented in $ 772.1 $ 258.9

Revenue Recognition (Tables)

Revenue Recognition (Tables)	6 Months Ended
Revenue Recognition (Tables)	Jun. 30, 2022
Revenue from Contract with Customer [Abstract]
Schedule of Company's Total Revenues by Category for each Reportable Segment	The following table presents the Company’s total revenues by category for each reportable segment. Three Months Ended June 30, 2022 Products and Services Freight Total (Dollars in Millions) East Group $ 632.4 $ 42.1 $ 674.5 West Group 816.8 68.7 885.5 Total Building Materials business 1,449.2 110.8 1,560.0 Magnesia Specialties 74.6 7.1 81.7 Total $ 1,523.8 $ 117.9 $ 1,641.7 Three Months Ended June 30, 2021 Products and Services Freight Total (Dollars in Millions) East Group $ 596.5 $ 38.8 $ 635.3 West Group 628.8 38.0 666.8 Total Building Materials business 1,225.3 76.8 1,302.1 Magnesia Specialties 70.0 5.8 75.8 Total $ 1,295.3 $ 82.6 $ 1,377.9 Six Months Ended June 30, 2022 Products and Services Freight Total (Dollars in Millions) East Group $ 1,027.0 $ 66.3 $ 1,093.3 West Group 1,499.2 121.3 1,620.5 Total Building Materials business 2,526.2 187.6 2,713.8 Magnesia Specialties 145.4 13.3 158.7 Total $ 2,671.6 $ 200.9 $ 2,872.5 Six Months Ended June 30, 2021 Products and Services Freight Total (Dollars in Millions) East Group $ 969.1 $ 61.1 $ 1,030.2 West Group 1,112.9 70.5 1,183.4 Total Building Materials business 2,082.0 131.6 2,213.6 Magnesia Specialties 135.2 11.5 146.7 Total $ 2,217.2 $ 143.1 $ 2,360.3
Summary of Information About the Company's Contract Balances	The following table presents information about the Company’s contract balances: (Dollars in Millions) June 30, 2022 December 31, 2021 Costs in excess of billings $ 14.3 $ 4.3 Billings in excess of costs $ 5.6 $ 7.8

Business Combinations, Divestit

Business Combinations, Divestitures and Discontinued Operations (Tables)	6 Months Ended
	Jun. 30, 2022
Business Combinations [Abstract]
Summary of Estimated Fair Values of Assets Acquired and Liabilities Assumed	The following is a summary of the preliminary estimated fair values of the assets acquired and liabilities assumed as of October 1, 2021 (dollars in millions): Assets: Inventories $ 91.9 Property, plant and equipment 849.9 Intangible assets, other than goodwill 551.0 Goodwill 1,041.8 Other assets 54.6 Total assets 2,589.2 Liabilities: Asset retirement obligations 225.5 Operating and finance lease liabilities 57.5 Other liabilities 41.6 Total liabilities 324.6 Total consideration $ 2,264.6
Summary of Discontinued Operations and Assets and Liabilities Held for Sale	Discontinued operations include the following: Three Months Ended Six Months Ended June 30, 2022 (Dollars in Millions) Total revenues $ 111.7 $ 206.4 Pretax earnings from operations $ 20.5 $ 16.4 Pretax loss on divestiture ( 1.0 ) ( 1.0 ) Pretax earnings $ 19.5 $ 15.4 Income tax expense 6.2 5.2 Earnings from discontinued operations, net of income tax expense $ 13.3 $ 10.2 Assets and liabilities held for sale as of June 30, 2022, include a cement plant in Tehachapi, California; cement distribution terminals; the California ready mixed concrete plants not sold as part of the aforementioned Redding transaction; and certain investment properties. At December 31, 2021 assets and liabilities held for sale also included the operations that were sold on June 30, 2022. Assets and liabilities held for sale as of June 30, 2022 and December 31, 2021 are as follows: June 30, 2022 December 31, 2021 Continuing Operations Discontinued Operations Total Continuing Operations Discontinued Operations Total (Dollars in Millions) Inventories, net $ — $ 19.5 $ 19.5 $ — $ 53.1 $ 53.1 Investment land 38.0 — 38.0 32.7 — 32.7 Other assets — — — — 16.4 16.4 Total current assets held for sale $ 38.0 $ 19.5 $ 57.5 $ 32.7 $ 69.5 $ 102.2 Property, plant and equipment $ — $ 130.0 $ 130.0 $ — $ 226.0 $ 226.0 Intangible assets, excluding goodwill — 208.5 208.5 — 264.9 264.9 Operating lease right-of-use assets — 14.0 14.0 — 18.1 18.1 Goodwill — 35.7 35.7 — 109.3 109.3 Other assets — 5.4 5.4 — 4.6 4.6 Valuation allowance for loss on sale — ( 5.4 ) ( 5.4 ) — ( 6.0 ) ( 6.0 ) Total noncurrent assets held for sale $ — $ 388.2 $ 388.2 $ — $ 616.9 $ 616.9 Lease obligations $ — $ ( 5.2 ) $ ( 5.2 ) $ — $ ( 7.5 ) $ ( 7.5 ) Total current liabilities held for sale $ — $ ( 5.2 ) $ ( 5.2 ) $ — $ ( 7.5 ) $ ( 7.5 ) Asset retirement obligations $ — $ ( 19.8 ) $ ( 19.8 ) $ — $ ( 31.5 ) $ ( 31.5 ) Lease obligations — ( 8.5 ) ( 8.5 ) — ( 22.0 ) ( 22.0 ) Other liabilities — ( 0.8 ) ( 0.8 ) — — — Total noncurrent liabilities held for sale $ — $ ( 29.1 ) $ ( 29.1 ) $ — $ ( 53.5 ) $ ( 53.5 )

Goodwill (Tables)

Goodwill (Tables)	6 Months Ended
Goodwill (Tables)	Jun. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Changes in Goodwill	The following table shows the changes in goodwill by reportable segment and in total: East West Group Group Total (Dollars in Millions) Balance at January 1, 2022 $ 759.4 $ 2,735.0 $ 3,494.4 Acquisitions — 3.7 3.7 Adjustments to purchase price allocations 5.0 52.8 57.8 Divestitures — ( 159.7 ) ( 159.7 ) Goodwill reclassified from assets held for sale — 4.3 4.3 Balance at June 30, 2022 $ 764.4 $ 2,636.1 $ 3,400.5

Inventories, Net (Tables)

Inventories, Net (Tables)	6 Months Ended
Inventories, Net (Tables)	Jun. 30, 2022
Inventory Disclosure [Abstract]
Schedule of Inventories Net	June 30, December 31, 2022 2021 (Dollars in Millions) Finished products $ 859.8 $ 713.3 Products in process 9.1 30.1 Raw materials 96.7 69.6 Supplies and expendable parts 139.6 153.9 1,105.2 966.9 Less: Allowances ( 270.0 ) ( 214.3 ) Total $ 835.2 $ 752.6

Long-Term Debt (Tables)

Long-Term Debt (Tables)	6 Months Ended
Long-Term Debt (Tables)	Jun. 30, 2022
Debt Disclosure [Abstract]
Long-Term Debt	June 30, December 31, 2022 2021 (Dollars in Millions) 0.650 % Senior Notes, due 2023 $ 698.3 $ 697.4 4.250 % Senior Notes, due 2024 398.6 398.3 7 % Debentures, due 2025 124.6 124.6 3.450 % Senior Notes, due 2027 298.1 297.9 3.500 % Senior Notes, due 2027 496.7 496.4 2.500 % Senior Notes, due 2030 471.8 491.1 2.400 % Senior Notes, due 2031 888.2 891.8 6.25 % Senior Notes, due 2037 228.3 228.3 4.250 % Senior Notes, due 2047 590.1 592.1 3.200 % Senior Notes, due 2051 849.6 882.9 Other notes — 0.1 Total debt 5,044.3 5,100.9 Less: Current maturities — ( 0.1 ) Long-term debt $ 5,044.3 $ 5,100.8

Pension and Postretirement Be_2

Pension and Postretirement Benefits (Tables)	6 Months Ended
Pension and Postretirement Benefits (Tables)	Jun. 30, 2022
Retirement Benefits [Abstract]
Schedule of Components of Net Periodic Benefit Cost (Credit)	The estimated components of the recorded net periodic benefit cost (credit) for pension and postretirement benefits are as follows: Pension Postretirement Benefits Three Months Ended June 30, 2022 2021 2022 2021 (Dollars in Millions) Service cost $ 14.0 $ 10.6 $ — $ — Interest cost 11.9 8.3 0.1 0.1 Expected return on assets ( 22.5 ) ( 16.3 ) — — Amortization of: Prior service cost (credit) 1.4 0.3 ( 0.2 ) ( 0.2 ) Actuarial loss (gain) 1.2 2.8 ( 0.1 ) — Net periodic benefit cost (credit) $ 6.0 $ 5.7 $ ( 0.2 ) $ ( 0.1 ) Pension Postretirement Benefits Six Months Ended June 30, 2022 2021 2022 2021 (Dollars in Millions) Service cost $ 24.0 $ 23.0 $ — $ — Interest cost 20.6 17.7 0.2 0.2 Expected return on assets ( 38.7 ) ( 35.1 ) — — Amortization of: Prior service cost (credit) 2.5 0.4 ( 0.4 ) ( 0.4 ) Actuarial loss (gain) 2.0 6.2 ( 0.1 ) ( 0.1 ) Net periodic benefit cost (credit) $ 10.4 $ 12.2 $ ( 0.3 ) $ ( 0.3 )

Business Segments (Tables)

Business Segments (Tables)	6 Months Ended
Business Segments (Tables)	Jun. 30, 2022
Segment Reporting [Abstract]
Financial Data for Continuing Operation for Company's Reportable Business Segments	The following table displays selected financial data for the Company’s reportable segments. Total revenues, as well as the consolidated statements of earnings and comprehensive earnings, exclude intersegment revenues, which represent sales from one segment to another segment and are eliminated in consolidation. Total revenues, product and services revenues, and earnings (loss) from operations reflect continuing operations only. In 2022, earnings from operations for the West Group include nonrecurring gains on divested assets of $ 151.7 million. Three Months Ended Six Months Ended June 30, June 30, 2022 2021 2022 2021 (Dollars in Millions) Total revenues: East Group $ 674.5 $ 635.3 $ 1,093.3 $ 1,030.2 West Group 885.5 666.8 1,620.5 1,183.4 Total Building Materials business 1,560.0 1,302.1 2,713.8 2,213.6 Magnesia Specialties 81.7 75.8 158.7 146.7 Total $ 1,641.7 $ 1,377.9 $ 2,872.5 $ 2,360.3 Products and services revenues: East Group $ 632.4 $ 596.5 $ 1,027.0 $ 969.1 West Group 816.8 628.8 1,499.2 1,112.9 Total Building Materials business 1,449.2 1,225.3 2,526.2 2,082.0 Magnesia Specialties 74.6 70.0 145.4 135.2 Total $ 1,523.8 $ 1,295.3 $ 2,671.6 $ 2,217.2 Earnings (Loss) from operations: East Group $ 210.6 $ 197.8 $ 238.5 $ 259.5 West Group 274.5 101.8 317.6 133.6 Total Building Materials business 485.1 299.6 556.1 393.1 Magnesia Specialties 20.3 23.1 41.8 46.7 Corporate ( 26.8 ) ( 15.2 ) ( 59.5 ) ( 33.0 ) Total $ 478.6 $ 307.5 $ 538.4 $ 406.8

Revenues and Gross Profit (Tabl

Revenues and Gross Profit (Tables)	6 Months Ended
Revenues and Gross Profit (Tables)	Jun. 30, 2022
Revenues And Gross Profit [Abstract]
Total Revenues and Gross Profit (Loss) by Product Line	The following table, which is reconciled to consolidated amounts, provides total revenues and gross profit (loss) by product line and reflects continuing operations only. Three Months Ended Six Months Ended June 30, June 30, 2022 2021 2022 2021 (Dollars in Millions) Total revenues: Building Materials business: Products and services: Aggregates $ 955.2 $ 801.8 $ 1,641.1 $ 1,374.4 Cement 157.9 116.5 292.2 226.1 Ready mixed concrete 226.1 268.4 516.2 503.7 Asphalt and paving services 212.3 135.3 267.1 147.6 Less: interproduct revenues ( 102.3 ) ( 96.7 ) ( 190.4 ) ( 169.8 ) Products and services 1,449.2 1,225.3 2,526.2 2,082.0 Freight 110.8 76.8 187.6 131.6 Total Building Materials business 1,560.0 1,302.1 2,713.8 2,213.6 Magnesia Specialties: Products and services 74.6 70.0 145.4 135.2 Freight 7.1 5.8 13.3 11.5 Total Magnesia Specialties 81.7 75.8 158.7 146.7 Total $ 1,641.7 $ 1,377.9 $ 2,872.5 $ 2,360.3 Gross profit (loss): Building Materials business: Products and services: Aggregates $ 309.0 $ 273.0 $ 410.9 $ 394.7 Cement 51.1 36.1 78.5 51.4 Ready mixed concrete 14.3 19.1 35.4 38.6 Asphalt and paving services 26.4 28.7 13.1 20.4 Products and services 400.8 356.9 537.9 505.1 Freight ( 1.7 ) 0.7 ( 0.4 ) 0.5 Total Building Materials business 399.1 357.6 537.5 505.6 Magnesia Specialties: Products and services 25.8 27.9 52.6 56.3 Freight ( 1.3 ) ( 0.9 ) ( 2.4 ) ( 1.9 ) Total Magnesia Specialties 24.5 27.0 50.2 54.4 Corporate 1.6 0.5 ( 6.4 ) ( 0.2 ) Total $ 425.2 $ 385.1 $ 581.3 $ 559.8

Supplemental Cash Flow Inform_2

Supplemental Cash Flow Information (Tables)	6 Months Ended
Supplemental Cash Flow Information (Tables)	Jun. 30, 2022
Supplemental Cash Flow Elements [Abstract]
Schedule of Noncash Investing and Financing Activities	Noncash investing and financing activities are as follows: Six Months Ended June 30, 2022 2021 (Dollars in Millions) Noncash investing and financing activities: Right-of-use assets obtained in exchange for $ 7.0 $ 158.8 Right-of-use assets obtained in exchange for new $ 13.0 $ 13.2 Accrued liabilities for purchases of property, plant and equipment $ 27.3 $ 29.5 Remeasurement of operating lease right-of-use assets $ ( 3.5 ) $ ( 6.3 ) Remeasurement of finance lease right-of-use assets $ ( 6.4 ) $ —
Supplemental Disclosures of Cash Flow Information	Supplemental disclosures of cash flow information are as follows: Six Months Ended June 30, 2022 2021 (Dollars in Millions) Cash paid for interest, net of capitalized amount $ 84.3 $ 53.6 Cash paid for income taxes, net of refunds $ 42.9 $ 56.9

Significant Accounting Polici_4

Significant Accounting Policies - Additional Information (Detail)	3 Months Ended	6 Months Ended
	Jun. 30, 2022 USD ($)	Jun. 30, 2022 USD ($) Segment Plant	Jun. 30, 2021 Facility State	Dec. 31, 2021 USD ($)
Significant Accounting Policies [Line Items]
Number of quarries and yards \| Facility			350
Number of states in which entity operates \| State			28
Reportable business segments \| Segment		2
Restricted cash	$ 0	$ 0		$ 500,000
Pension and Postretirement Benefit Plans
Significant Accounting Policies [Line Items]
Other comprehensive loss, before reclassifications, net of tax	$ (400,000)	$ 33,000,000
California
Significant Accounting Policies [Line Items]
Number of cement plants \| Plant		1

Significant Accounting Polici_5

Significant Accounting Policies - Comprehensive (Loss) Earnings Attributable to Martin Marietta Materials Incorporated (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
Net earnings attributable to Martin Marietta	$ 366.5	$ 225.8	$ 387.9	$ 291.1
Other comprehensive (loss) earnings, net of tax	1.2	2.6	(30.5)	5.4
Earnings attributable to Martin Marietta Materials, Inc.	$ 367.7	$ 228.4	$ 357.4	$ 296.5

Significant Accounting Polici_6

Significant Accounting Policies - Changes in Accumulated Other Comprehensive Loss Net of Tax (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance, Total Equity	$ 6,431	$ 5,926.7	$ 6,537.6	$ 5,893.3
Amounts reclassified from accumulated other comprehensive loss, net of tax	(1.7)	2.1
Other comprehensive (loss) earnings, net of tax	1.2	2.6	(30.5)	5.4
Ending Balance, Total Equity	6,772.1	6,128.2	6,772.1	6,128.2
Pension and Postretirement Benefit Plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance, Total Equity	(129.7)	(155.6)	(97.6)	(158.1)
Other comprehensive (loss) earnings before reclassifications, net of tax	0.4		(33)
Amounts reclassified from accumulated other comprehensive loss, net of tax	(1.7)	2.1	(3)	4.6
Other comprehensive (loss) earnings, net of tax	2.1	2.1	(30)	4.6
Ending Balance, Total Equity	(127.6)	(153.5)	(127.6)	(153.5)
Foreign Currency
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance, Total Equity	0.4			(0.3)
Other comprehensive (loss) earnings before reclassifications, net of tax	(0.9)	0.5	(0.5)	0.8
Other comprehensive (loss) earnings, net of tax	(0.9)	0.5	(0.5)	0.8
Ending Balance, Total Equity	(0.5)	0.5	(0.5)	0.5
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance, Total Equity	(129.3)	(155.6)	(97.6)	(158.4)
Other comprehensive (loss) earnings before reclassifications, net of tax	(0.5)	0.5	(33.5)	0.8
Amounts reclassified from accumulated other comprehensive loss, net of tax	(1.7)		(3)	4.6
Other comprehensive (loss) earnings, net of tax	1.2		(30.5)	5.4
Ending Balance, Total Equity	$ (128.1)	$ (153)	$ (128.1)	$ (153)

Significant Accounting Polici_7

Significant Accounting Policies - Noncurrent Deferred Tax Assets Recorded in Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Equity [Abstract]
Balance at beginning of period, Pension and Postretirement Benefit Plans	$ 80.2	$ 88.7	$ 69.7	$ 89.4
Tax effect of other comprehensive loss (earnings)	(0.7)	(0.8)	9.8	(1.5)
Balance at end of period, Pension and Postretirement Benefit Plans	$ 79.5	$ 87.9	$ 79.5	$ 87.9

Significant Accounting Polici_8

Significant Accounting Policies - Reclassifications Out of Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Tax benefit	$ 104.4	$ 62.3	$ 110.2	$ 78.1
Earnings from Continuing Operations	(1.7)	2.1
Pension and Postretirement Benefit Plans
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Earnings from Continuing Operations	(1.7)	2.1	(3)	4.6
Reclassification out of Accumulated Other Comprehensive Income \| Pension and Postretirement Benefit Plans
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Prior service credit	1.2	0.1	2.1
Actuarial loss	(1.1)	2.8	(1.9)	6.1
Tax benefit	(0.6)	(0.8)	(1)	(1.5)
Earnings from Continuing Operations		2.1	(3)	4.6
Reclassification out of Accumulated Other Comprehensive Income \| Pension and Postretirement Benefit Plans \| Other Nonoperating Income, Net
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications out of accumulated other comprehensive loss before taxes	$ 2.3	$ 2.9	$ 4	$ 6.1

Significant Accounting Polici_9

Significant Accounting Policies - Basic and Diluted Earnings from Continuing Operations Per Common Share (Detail) - USD ($) shares in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Earnings Per Share [Abstract]
Net earnings from continuing operations attributable to Martin Marietta	$ 353,200,000	$ 225.8	$ 377,700,000	$ 291.1
Less: Distributed and undistributed earnings attributable to unvested awards		0.2		0.2
Basic and diluted net earnings from continuing operations available to common shareholders attributable to Martin Marietta	$ 353,200,000	$ 225.6	$ 377,700,000	$ 290.9
Basic weighted-average common shares outstanding	62.4	62.4	62.4	62.4
Effect of dilutive employee and director awards	0.1	0.1	0.2	0.1
Diluted weighted-average common shares outstanding	62.5	62.5	62.6	62.5

Significant Accounting Polic_10

Significant Accounting Policies - Reconciliation of Cash, Cash Equivalents and Restricted Cash (Detail) - USD ($)	Jun. 30, 2022	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020
Restricted Cash and Cash Equivalents [Abstract]
Cash and cash equivalents	$ 772,100,000	$ 258,400,000
Restricted cash	0	500,000
Total cash, cash equivalents and restricted cash presented in the consolidated statements of cash flows	$ 772,100,000	$ 258,900,000	$ 70,300,000	$ 304,400,000

Revenue Recognition - Additiona

Revenue Recognition - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Revenue Recognition [Line Items]
Performance obligations, description of timing			Performance obligations within paving service agreements are satisfied over time, primarily ranging from one day to two years. For product revenues and freight revenues, customer payment terms are generally 30 days from invoice date. Customer payments for the paving operations are based on a contractual billing schedule and are due 30 days from invoice date.
Product and freight revenues customer payment terms			30 days
Customer payments terms based on contractual billing			30 days
Future revenues from unsatisfied performance obligations	$ 322.5	$ 215.5	$ 322.5	$ 215.5
Service revenues	1,641.7	1,377.9	2,872.5	2,360.3
Revenue recognized from contract liabilities	4.5	5.4	6.6	9.4
Retainage on contracts	10.6		10.6		$ 10.5
Service \| CALIFORNIA and COLORADO \| West Group
Revenue Recognition [Line Items]
Service revenues	$ 95	$ 73.4	$ 113.3	$ 82.2
Minimum \| Service
Revenue Recognition [Line Items]
Performance obligations, period			1 day
Maximum \| Service
Revenue Recognition [Line Items]
Performance obligations, period			2 years

Revenue Recognition - Additio_2

Revenue Recognition - Additional Information (Detail 1)	Jun. 30, 2022	Jun. 30, 2021
Minimum \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2021-07-01
Revenue Recognition [Line Items]
Performance obligations, customer satisfaction period		1 month
Minimum \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2022-07-01
Revenue Recognition [Line Items]
Performance obligations, customer satisfaction period	1 month
Maximum \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2021-07-01
Revenue Recognition [Line Items]
Performance obligations, customer satisfaction period		21 months

Revenue Recognition - Schedule

Revenue Recognition - Schedule of Company's Total Revenues by Category for each Reportable Segment (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenue Recognition [Line Items]
Total	$ 1,641.7	$ 1,377.9	$ 2,872.5	$ 2,360.3
Building Materials Business
Revenue Recognition [Line Items]
Total	1,560	1,302.1	2,713.8	2,213.6
Products and Services
Revenue Recognition [Line Items]
Total	1,523.8	1,295.3	2,671.6	2,217.2
Products and Services \| Building Materials Business
Revenue Recognition [Line Items]
Total	1,449.2	1,225.3	2,526.2	2,082
Freight
Revenue Recognition [Line Items]
Total	117.9	82.6	200.9	143.1
Freight \| Building Materials Business
Revenue Recognition [Line Items]
Total	110.8	76.8	187.6	131.6
Operating Segments \| Building Materials Business East Group
Revenue Recognition [Line Items]
Total	674.5	635.3	1,093.3	1,030.2
Operating Segments \| Building Materials Business West Group
Revenue Recognition [Line Items]
Total	885.5	666.8	1,620.5	1,183.4
Operating Segments \| Building Materials Business
Revenue Recognition [Line Items]
Total	1,560	1,302.1	2,713.8	2,213.6
Operating Segments \| Magnesia Specialties
Revenue Recognition [Line Items]
Total	81.7	75.8	158.7	146.7
Operating Segments \| Products and Services \| Building Materials Business East Group
Revenue Recognition [Line Items]
Total	632.4	596.5	1,027	969.1
Operating Segments \| Products and Services \| Building Materials Business West Group
Revenue Recognition [Line Items]
Total	816.8	628.8	1,499.2	1,112.9
Operating Segments \| Products and Services \| Magnesia Specialties
Revenue Recognition [Line Items]
Total	74.6	70	145.4	135.2
Operating Segments \| Freight \| Building Materials Business East Group
Revenue Recognition [Line Items]
Total	42.1	38.8	66.3	61.1
Operating Segments \| Freight \| Building Materials Business West Group
Revenue Recognition [Line Items]
Total	68.7	38	121.3	70.5
Operating Segments \| Freight \| Building Materials Business
Revenue Recognition [Line Items]
Total	110.8	76.8	187.6	131.6
Operating Segments \| Freight \| Magnesia Specialties
Revenue Recognition [Line Items]
Total	$ 7.1	$ 5.8	$ 13.3	$ 11.5

Revenue Recognition - Summary o

Revenue Recognition - Summary of Information About the Company's Contract Balances (Detail) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Revenue from Contract with Customer [Abstract]
Costs in excess of billings	$ 14.3	$ 4.3
Billings in excess of costs	$ 5.6	$ 7.8

Business Combinations, Divest_2

Business Combinations, Divestitures and Discontinued Operations - Additional Information (Detail) $ in Millions					3 Months Ended	6 Months Ended
	Apr. 01, 2022 USD ($)	Oct. 01, 2021 USD ($)	Jul. 30, 2021	Apr. 30, 2021	Jun. 30, 2022 USD ($)	Jun. 30, 2022 USD ($) Plant
Business Acquisition [Line Items]
Assumed asset retirement obligations liability					$ 46.6	$ 57.8
Cash used for operating and investing activities for discontinued operations						224.2
Proceeds from divestitures						235
Capital expenditures						$ 13.2
Business combination number of California ready mix operations \| Plant						14
Total Revenues					235	$ 235
Interest payable						15
Cement and California Ready Mix Businesses
Business Acquisition [Line Items]
Amortization or depreciation expense					0	0
Colorado and Central Texas
Business Acquisition [Line Items]
Pretax gain	$ 151.7				$ 151.7	$ 151.7
Lehigh West Region
Business Acquisition [Line Items]
Business combination, effective date		2021-10
Cash transferred in business combination		$ 2,260
Southern Crushed Concrete
Business Acquisition [Line Items]
Business combination, effective date			2021-07
Tiller Corporation
Business Acquisition [Line Items]
Business combination, effective date				2021-04

Business Combinations, Divest_3

Business Combinations, Divestitures and Discontinued Operations - Summary of Estimated Fair Values of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021	Oct. 01, 2021
Assets:
Goodwill	$ 3,400.5	$ 3,494.4
Lehigh West Region
Assets:
Inventories			$ 91.9
Property, plant and equipment			849.9
Intangible assets, other than goodwill			551
Goodwill			1,041.8
Other assets			54.6
Total assets			2,589.2
Liabilities:
Asset retirement obligations			225.5
Operating and finance lease liabilities			57.5
Other liabilities			41.6
Total liabilities			324.6
Total consideration			$ 2,264.6

Business Combinations, Divest_4

Business Combinations, Divestitures and Discontinued Operations - Summary of Discontinued Operations (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2022
Discontinued Operations and Disposal Groups [Abstract]
Total revenues	$ 111.7	$ 206.4
Pretax earnings from operations	20.5	16.4
Pretax loss on divestiture	(1)	(1)
Pretax earnings	19.5	15.4
Income tax expense	6.2	5.2
Earnings from discontinued operations, net of income tax expense	$ 13.3	$ 10.2

Business Combinations, Divest_5

Business Combinations, Divestitures and Discontinued Operations - Summary of Assets and Liabilities Held for Sale (Detail) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Inventories, net	$ 19.5	$ 53.1
Investment land	38	32.7
Other assets		16.4
Total current assets held for sale	57.5	102.2
Property, plant and equipment	130	226
Intangible assets, excluding goodwill	208.5	264.9
Operating lease right-of-use assets	14	18.1
Goodwill	35.7	109.3
Other assets	5.4	4.6
Valuation allowance for loss on sale	(5.4)	(6)
Total noncurrent assets held for sale	388.2	616.9
Lease obligations	(5.2)	(7.5)
Total current liabilities held for sale	(5.2)	(7.5)
Asset retirement obligations	(19.8)	(31.5)
Lease obligations	(8.5)	(22)
Other liabilities	(0.8)
Total noncurrent liabilities held for sale	(29.1)	(53.5)
Continuing Operations
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Investment land	38	32.7
Total current assets held for sale	38	32.7
Discontinued Operations
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Inventories, net	19.5	53.1
Other assets		16.4
Total current assets held for sale	19.5	69.5
Property, plant and equipment	130	226
Intangible assets, excluding goodwill	208.5	264.9
Operating lease right-of-use assets	14	18.1
Goodwill	35.7	109.3
Other assets	5.4	4.6
Valuation allowance for loss on sale	(5.4)	(6)
Total noncurrent assets held for sale	388.2	616.9
Lease obligations	(5.2)	(7.5)
Total current liabilities held for sale	(5.2)	(7.5)
Asset retirement obligations	(19.8)	(31.5)
Lease obligations	(8.5)	(22)
Other liabilities	(0.8)
Total noncurrent liabilities held for sale	$ (29.1)	$ (53.5)

Goodwill - Changes in Goodwill

Goodwill - Changes in Goodwill (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2022
Goodwill [Line Items]
Balance at January 1, 2022		$ 3,494.4
Acquisitions		3.7
Adjustments to purchase price allocations	$ 46.6	57.8
Divestitures		(159.7)
Goodwill reclassified from assets held for sale		4.3
Balance at June 30, 2022	3,400.5	3,400.5
East Group
Goodwill [Line Items]
Balance at January 1, 2022		759.4
Adjustments to purchase price allocations		5
Balance at June 30, 2022	764.4	764.4
West Group
Goodwill [Line Items]
Balance at January 1, 2022		2,735
Acquisitions		3.7
Adjustments to purchase price allocations		52.8
Divestitures		(159.7)
Goodwill reclassified from assets held for sale		4.3
Balance at June 30, 2022	$ 2,636.1	$ 2,636.1

Inventories, Net - Schedule of

Inventories, Net - Schedule of Inventories Net (Detail) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Inventory Disclosure [Abstract]
Finished products	$ 859.8	$ 713.3
Products in process	9.1	30.1
Raw materials	96.7	69.6
Supplies and expendable parts	139.6	153.9
Inventories, Gross	1,105.2	966.9
Less: Allowances	(270)	(214.3)
Total	$ 835.2	$ 752.6

Long-Term Debt - Long-Term Debt

Long-Term Debt - Long-Term Debt (Detail) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Total debt	$ 5,044.3	$ 5,100.9
Less: Current maturities	0	(0.1)
Long-term debt	5,044.3	5,100.8
0.650% Senior Notes, Due 2023
Debt Instrument [Line Items]
Total debt	698.3	697.4
4.25% Senior Notes, Due 2024
Debt Instrument [Line Items]
Total debt	398.6	398.3
7% Debentures, Due 2025
Debt Instrument [Line Items]
Total debt	124.6	124.6
3.450% Senior Notes, Due 2027
Debt Instrument [Line Items]
Total debt	298.1	297.9
3.500% Senior Notes, Due 2027
Debt Instrument [Line Items]
Total debt	496.7	496.4
2.500% Senior Notes, Due 2030
Debt Instrument [Line Items]
Total debt	471.8	491.1
2.400% Senior Notes, Due 2031
Debt Instrument [Line Items]
Total debt	888.2	891.8
6.25% Senior Notes, Due 2037
Debt Instrument [Line Items]
Total debt	228.3	228.3
4.250% Senior Notes, Due 2047
Debt Instrument [Line Items]
Total debt	590.1	592.1
3.200% Senior Notes, Due 2051
Debt Instrument [Line Items]
Total debt	849.6	882.9
Other Notes
Debt Instrument [Line Items]
Total debt	$ 0	$ 0.1

Long-Term Debt - Long-Term De_2

Long-Term Debt - Long-Term Debt (Parenthetical) (Detail)	6 Months Ended
Long-Term Debt - Long-Term Debt (Parenthetical) (Detail)	Jun. 30, 2022
0.650% Senior Notes, Due 2023
Debt Instrument [Line Items]
Maturity year	2023
Interest rate on notes	0.65%
4.25% Senior Notes, Due 2024
Debt Instrument [Line Items]
Maturity year	2024
Interest rate on notes	4.25%
7% Debentures, Due 2025
Debt Instrument [Line Items]
Maturity year	2025
Interest rate on notes	7%
3.450% Senior Notes, Due 2027
Debt Instrument [Line Items]
Maturity year	2027
Interest rate on notes	3.45%
3.500% Senior Notes, Due 2027
Debt Instrument [Line Items]
Maturity year	2027
Interest rate on notes	3.50%
2.500% Senior Notes, Due 2030
Debt Instrument [Line Items]
Maturity year	2030
Interest rate on notes	2.50%
2.400% Senior Notes, Due 2031
Debt Instrument [Line Items]
Maturity year	2031
Interest rate on notes	2.40%
6.25% Senior Notes, Due 2037
Debt Instrument [Line Items]
Maturity year	2037
Interest rate on notes	6.25%
4.250% Senior Notes, Due 2047
Debt Instrument [Line Items]
Maturity year	2047
Interest rate on notes	4.25%
3.200% Senior Notes, Due 2051
Debt Instrument [Line Items]
Maturity year	2051
Interest rate on notes	3.20%

Long-Term Debt - Additional Inf

Long-Term Debt - Additional Information (Detail)		6 Months Ended
Long-Term Debt - Additional Information (Detail)	Dec. 05, 2016 USD ($)	Jun. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)
Debt Instrument [Line Items]
Maximum consolidated debt reduction for unrestricted cash and temporary investments		$ 500,000,000
Outstanding letters of credit		17,200,000
Senior Notes
Debt Instrument [Line Items]
Principal amount of stock repurchased during the period		$ 60,500,000
Revolving Facility
Debt Instrument [Line Items]
Credit facility commitment	$ 800,000,000
Debt instrument maturity period		Dec. 21, 2026
Outstanding borrowing under credit facility		$ 0	$ 0
Senior unsecured revolving facility, maturity period	5 years
Outstanding letters of credit		$ 2,600,000	2,600,000
Maximum \| Including Acquisition Bridge Debt
Debt Instrument [Line Items]
Debt covenant		3.50
Maximum \| Excluding Acquisition Bridge Debt
Debt Instrument [Line Items]
Debt covenant		4
Trade Receivable Facility
Debt Instrument [Line Items]
Line of credit, trade receivable securitization facility		$ 400,000,000
Debt instrument maturity period		Sep. 21, 2022
Outstanding borrowing under credit facility		$ 0	$ 0
Trade Receivable Facility \| Maximum
Debt Instrument [Line Items]
Credit facility commitment		$ 500,000,000
Trade Receivable Facility \| London Interbank Offered Rate(LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate		1%
Trade Receivable Facility \| Conduit Lenders
Debt Instrument [Line Items]
Basis spread on variable rate		0.85%

Financial Instruments - Additio

Financial Instruments - Additional Information (Detail) $ in Millions	6 Months Ended
	Jun. 30, 2022 USD ($) Customer	Jun. 30, 2021 Customer	Dec. 31, 2021 USD ($)
Debt Instrument [Line Items]
Long-term debt, carrying values	$ 5,044.3		$ 5,100.9
Long-term debt, fair values	$ 4,480		$ 5,450
Customer Concentration Risk \| Accounts Receivable
Debt Instrument [Line Items]
Number of customer accounted for 10% or more of consolidated accounts receivable \| Customer	0	0
Customer Concentration Risk \| Accounts Receivable \| Minimum
Debt Instrument [Line Items]
Percentage of concentration risk	10%	10%

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail)	6 Months Ended
Income Taxes - Additional Information (Detail)	Jun. 30, 2022	Jun. 30, 2021
Income Tax Disclosure [Abstract]
Effective income tax rates for continuing operations	22.60%	21.20%

Pension and Postretirement Be_3

Pension and Postretirement Benefits - Additional Information (Detail) - Pension	6 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Description of pension plan	During the six months ended June 30, 2022, the Company amended its qualified pension plan and provided an enhanced benefit for eligible hourly active participants who retire subsequent to April 30, 2022. The amendment required a pension remeasurement. The Company elected the use of a practical expedient to perform the pension remeasurement as of February 28, 2022, the month-end closest to the approval of the plan amendment. The discount rate for the remeasurement was 3.75% compared with 3.23% prior to the remeasurement. The enhanced benefit and remeasurement resulted in higher pension expense for the year compared with the initial estimate of the annual pension expense for the qualified plan.
Discount rate for remeasurement	3.75%	3.23%

Pension and Postretirement Be_4

Pension and Postretirement Benefits - Schedule of Components of Net Periodic Benefit Cost (Credit) (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Pension
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 14	$ 10.6	$ 24	$ 23
Interest cost	11.9	8.3	20.6	17.7
Expected return on assets	(22.5)	(16.3)	(38.7)	(35.1)
Prior service cost (credit)	1.4	0.3	2.5	0.4
Actuarial loss (gain)	1.2	2.8	2	6.2
Net periodic benefit cost (credit)	6	5.7	10.4	12.2
Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Interest cost	0.1	0.1	0.2	0.2
Prior service cost (credit)	(0.2)	(0.2)	(0.4)	(0.4)
Actuarial loss (gain)	(0.1)		(0.1)	(0.1)
Net periodic benefit cost (credit)	$ (0.2)	$ (0.1)	$ (0.3)	$ (0.3)

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Commitments and Contingencies [Line Items]
Guarantee of affiliate's obligations	$ 15
Due from affiliate	$ 3.7
Line of credit maturity period	2024-03
Outstanding letters of credit	$ 17.2
Revolving Facility
Commitments and Contingencies [Line Items]
Outstanding letters of credit	2.6	$ 2.6
Interest-only loan receivable
Commitments and Contingencies [Line Items]
Due from affiliate	$ 6	$ 6
Maturity date	Dec. 31, 2024
Interest-only loan receivable \| London Interbank Offered Rate(LIBOR)
Commitments and Contingencies [Line Items]
Basis spread on variable rate	1.63%

Business Segments - Additional

Business Segments - Additional Information (Detail) $ in Millions	6 Months Ended
	Jun. 30, 2022 USD ($) Segment
Segment Reporting Information [Line Items]
Reportable business segments \| Segment	2
West Group [Member]
Segment Reporting Information [Line Items]
Nonrecurring gains on divested assets \| $	$ 151.7

Business Segments - Financial D

Business Segments - Financial Data for Continuing Operations for Company's Reportable Business Segments (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Segment Reporting Information [Line Items]
Total Revenues	$ 1,641.7	$ 1,377.9	$ 2,872.5	$ 2,360.3
Earnings (Loss) from operations	478.6	307.5	538.4	406.8
Products and Services
Segment Reporting Information [Line Items]
Total Revenues	1,523.8	1,295.3	2,671.6	2,217.2
Building Materials Business
Segment Reporting Information [Line Items]
Total Revenues	1,560	1,302.1	2,713.8	2,213.6
Earnings (Loss) from operations	485.1	299.6	556.1	393.1
Building Materials Business \| Products and Services
Segment Reporting Information [Line Items]
Total Revenues	1,449.2	1,225.3	2,526.2	2,082
Operating Segments \| Building Materials Business East Group
Segment Reporting Information [Line Items]
Total Revenues	674.5	635.3	1,093.3	1,030.2
Earnings (Loss) from operations	210.6	197.8	238.5	259.5
Operating Segments \| Building Materials Business East Group \| Products and Services
Segment Reporting Information [Line Items]
Total Revenues	632.4	596.5	1,027	969.1
Operating Segments \| Building Materials Business West Group
Segment Reporting Information [Line Items]
Total Revenues	885.5	666.8	1,620.5	1,183.4
Earnings (Loss) from operations	274.5	101.8	317.6	133.6
Operating Segments \| Building Materials Business West Group \| Products and Services
Segment Reporting Information [Line Items]
Total Revenues	816.8	628.8	1,499.2	1,112.9
Operating Segments \| Magnesia Specialties
Segment Reporting Information [Line Items]
Total Revenues	81.7	75.8	158.7	146.7
Earnings (Loss) from operations	20.3	23.1	41.8	46.7
Operating Segments \| Magnesia Specialties \| Products and Services
Segment Reporting Information [Line Items]
Total Revenues	74.6	70	145.4	135.2
Operating Segments \| Building Materials Business
Segment Reporting Information [Line Items]
Total Revenues	1,560	1,302.1	2,713.8	2,213.6
Corporate
Segment Reporting Information [Line Items]
Earnings (Loss) from operations	$ (26.8)	$ (15.2)	$ (59.5)	$ (33)

Revenues and Gross Profit - Tot

Revenues and Gross Profit - Total Revenues and Gross Profit (Loss) by Product Line (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Product Information [Line Items]
Total Revenues	$ 1,641.7	$ 1,377.9	$ 2,872.5	$ 2,360.3
Gross profit (loss)	425.2	385.1	581.3	559.8
Interproduct Revenues
Product Information [Line Items]
Total Revenues	(102.3)	(96.7)	(190.4)	(169.8)
Corporate
Product Information [Line Items]
Gross profit (loss)	1.6	0.5	(6.4)	(0.2)
Building Materials Business
Product Information [Line Items]
Total Revenues	1,560	1,302.1	2,713.8	2,213.6
Building Materials Business \| Operating Segments
Product Information [Line Items]
Total Revenues	1,560	1,302.1	2,713.8	2,213.6
Gross profit (loss)	399.1	357.6	537.5	505.6
Building Materials Business \| Operating Segments \| Products and Services
Product Information [Line Items]
Total Revenues	1,449.2	1,225.3	2,526.2	2,082
Gross profit (loss)	400.8	356.9	537.9	505.1
Magnesia Specialties \| Operating Segments
Product Information [Line Items]
Total Revenues	81.7	75.8	158.7	146.7
Gross profit (loss)	24.5	27	50.2	54.4
Magnesia Specialties \| Operating Segments \| Products and Services
Product Information [Line Items]
Total Revenues	74.6	70	145.4	135.2
Gross profit (loss)	25.8	27.9	52.6	56.3
Aggregates \| Building Materials Business \| Operating Segments \| Reportable Subsegments \| Products and Services
Product Information [Line Items]
Total Revenues	955.2	801.8	1,641.1	1,374.4
Gross profit (loss)	309	273	410.9	394.7
Cement \| Building Materials Business \| Operating Segments \| Reportable Subsegments \| Products and Services
Product Information [Line Items]
Total Revenues	157.9	116.5	292.2	226.1
Gross profit (loss)	51.1	36.1	78.5	51.4
Ready Mixed Concrete \| Building Materials Business \| Operating Segments \| Reportable Subsegments \| Products and Services
Product Information [Line Items]
Total Revenues	226.1	268.4	516.2	503.7
Gross profit (loss)	14.3	19.1	35.4	38.6
Asphalt and Paving \| Building Materials Business \| Operating Segments \| Reportable Subsegments \| Products and Services
Product Information [Line Items]
Total Revenues	212.3	135.3	267.1	147.6
Gross profit (loss)	(26.4)	28.7	13.1	20.4
Freight
Product Information [Line Items]
Total Revenues	117.9	82.6	200.9	143.1
Freight \| Building Materials Business
Product Information [Line Items]
Total Revenues	110.8	76.8	187.6	131.6
Freight \| Building Materials Business \| Operating Segments
Product Information [Line Items]
Total Revenues	110.8	76.8	187.6	131.6
Gross profit (loss)	1.7	0.7	0.4	0.5
Freight \| Magnesia Specialties \| Operating Segments
Product Information [Line Items]
Total Revenues	7.1	5.8	13.3	11.5
Gross profit (loss)	$ (1.3)	$ (0.9)	$ (2.4)	$ (1.9)

Supplemental Cash Flow Inform_3

Supplemental Cash Flow Information - Schedule of Noncash Investing and Financing Activities (Detail) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Supplemental Cash Flow Elements [Abstract]
Right-of-use assets obtained in exchange for new finance lease liabilities	$ 7	$ 158.8
Right-of-use assets obtained in exchange for new operating lease liabilities	13	13.2
Accrued liabilities for purchases of property, plant and equipment	27.3	29.5
Remeasurement of operating lease right-of-use assets	(3.5)	$ (6.3)
Remeasurement of finance lease right-of-use assets	$ 6.4

Supplemental Cash Flow Inform_4

Supplemental Cash Flow Information - Supplemental Disclosures of Cash Flow Information (Detail) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Supplemental Cash Flow Elements [Abstract]
Cash paid for interest, net of capitalized amount	$ 84.3	$ 53.6
Cash paid for income taxes, net of refunds	$ 42.9	$ 56.9

Supplemental Cash Flow Inform_5

Supplemental Cash Flow Information - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2021 USD ($)
Supplemental Cash Flow Elements [Abstract]
Repayment of loans related to life insurance policies	$ 11.2

Other Operating Income, Net - A

Other Operating Income, Net - Additional Information (Detail) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
	Apr. 01, 2022	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Colorado and Central Texas
Property, Plant and Equipment [Line Items]
Gain on sale of investment	$ 151.7	$ 151.7		$ 151.7
Corporate Headquarters [Member]
Property, Plant and Equipment [Line Items]
Gain on sale of investment			$ 12.3		$ 12.3

Other Nonoperating Income, Net

Other Nonoperating Income, Net - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2022
Other Nonoperating Income, Net
Condensed Income Statements, Captions [Line Items]
Gain on repurchase of bond	$ 11.6	$ 11.6