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Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2021

Martin Marietta Materials, Inc. (the Company or Martin Marietta) is a natural resource-based building materials company. As of September 30, 2021, the Company supplies aggregates (crushed stone, sand and gravel) through its network of approximately 320 quarries, mines and distribution yards in 26 states, Canada and The Bahamas. In the southwestern and western United States, 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. 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, Iowa, Kansas, Kentucky, Maryland, Minnesota, Missouri, eastern Nebraska, North Carolina, Ohio, Pennsylvania, South Carolina, Tennessee, Virginia, West Virginia, Nova Scotia and The Bahamas	Arkansas, Colorado, Louisiana, western Nebraska, Oklahoma, Texas, Utah, Washington and Wyoming

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, 2020. 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 nine months ended September 30, 2021 are not necessarily indicative of the results expected for other interim periods or the full year. The consolidated balance sheet at December 31, 2020 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, 2020.

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.

Reclassifications

As of January 1, 2021, the Company reclassified accrued income taxes from Other current liabilities to Accrued other taxes on the Company’s consolidated balance sheet. Prior-year information has been reclassified to conform to current year presentation. The reclassification had no impact on the Company’s previously reported results of operations, financial position or cash flows.

Consolidated Comprehensive Earnings and Accumulated Other Comprehensive Loss

Consolidated comprehensive earnings 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 attributable to Martin Marietta is as follows:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2021		2020		2021		2020
	(Dollars in Millions)
Net earnings attributable to Martin Marietta	$	254.6	$	294.4	$	545.7	$	538.0
Other comprehensive earnings, net of tax		1.6		3.6		7.0		7.2
Comprehensive earnings attributable to Martin Marietta	$	256.2	$	298.0	$	552.7	$	545.2

Changes in accumulated other comprehensive loss, net of tax, are as follows:

	(Dollars in Millions)
	Pension and Postretirement Benefit Plans			Foreign Currency			Accumulated Other Comprehensive Loss
	Three Months Ended September 30, 2021
Balance at beginning of period	$	(153.5	)	$	0.5		$	(153.0	)
Other comprehensive loss before reclassifications, net of tax		—			(0.6	)		(0.6	)
Amounts reclassified from accumulated other comprehensive loss, net of tax		2.2			—			2.2
Other comprehensive earnings (loss), net of tax		2.2			(0.6	)		1.6
Balance at end of period	$	(151.3	)	$	(0.1	)	$	(151.4	)

	Three Months Ended September 30, 2020
Balance at beginning of period	$	(140.0	)	$	(2.2	)	$	(142.2	)
Other comprehensive earnings before reclassifications, net of tax		—			0.5			0.5
Amounts reclassified from accumulated other comprehensive loss, net of tax		3.1			—			3.1
Other comprehensive earnings, net of tax		3.1			0.5			3.6
Balance at end of period	$	(136.9	)	$	(1.7	)	$	(138.6	)

	(Dollars in Millions)
	Pension and Postretirement Benefit Plans			Foreign Currency			Accumulated Other Comprehensive Loss
	Nine Months Ended September 30, 2021
Balance at beginning of period	$	(158.1	)	$	(0.3	)	$	(158.4	)
Other comprehensive earnings before reclassifications, net of tax		—			0.2			0.2
Amounts reclassified from accumulated other comprehensive loss, net of tax		6.8			—			6.8
Other comprehensive earnings, net of tax		6.8			0.2			7.0
Balance at end of period	$	(151.3	)	$	(0.1	)	$	(151.4	)

	Nine Months Ended September 30, 2020
Balance at beginning of period	$	(144.9	)	$	(0.9	)	$	(145.8	)
Other comprehensive loss before reclassifications, net of tax		—			(0.8	)		(0.8	)
Amounts reclassified from accumulated other comprehensive loss, net of tax		8.0			—			8.0
Other comprehensive earnings (loss), net of tax		8.0			(0.8	)		7.2
Balance at end of period	$	(136.9	)	$	(1.7	)	$	(138.6	)

Changes in net noncurrent deferred tax assets related to accumulated other comprehensive loss are as follows:

	Pension and Postretirement Benefit Plans
	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2021			2020			2021			2020
	(Dollars in Millions)
Balance at beginning of period	$	87.9		$	83.6		$	89.4		$	85.2
Tax effect of other comprehensive earnings		(0.8	)		(1.1	)		(2.3	)		(2.7	)
Balance at end of period	$	87.1		$	82.5		$	87.1		$	82.5

Reclassifications out of accumulated other comprehensive loss are as follows:

	Three Months Ended						Nine Months Ended						Affected line items in the
	September 30,						September 30,						consolidated statements of earnings
	2021			2020			2021			2020			and comprehensive earnings
	(Dollars in Millions)
Pension and postretirement benefit plans
Amortization of:
Prior service credit	$	—		$	—		$	—		$	(0.1	)
Actuarial loss		3.0			4.2			9.1			10.8		Other nonoperating income, net
		3.0			4.2			9.1			10.7
Tax benefit		(0.8	)		(1.1	)		(2.3	)		(2.7	)	Income tax expense
	$	2.2		$	3.1		$	6.8		$	8.0

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. 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 nine months ended September 30, 2021 and 2020, 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 per common share:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2021		2020		2021		2020
	(In Millions)
Net earnings attributable to Martin Marietta	$	254.6	$	294.4	$	545.7	$	538.0
Less: Distributed and undistributed earnings attributable to unvested awards		—		0.3		—		0.5
Basic and diluted net earnings available to common shareholders attributable to Martin Marietta	$	254.6	$	294.1	$	545.7	$	537.5

Basic weighted-average common shares outstanding		62.4		62.3		62.4		62.3
Effect of dilutive employee and director awards		0.2		0.1		0.2		0.1
Diluted weighted-average common shares outstanding		62.6		62.4		62.6		62.4

Restricted Cash

At September 30, 2021 and December 31, 2020, the Company had restricted cash of $1.7 million and $97.1 million, respectively, which is 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 is 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. Any unused cash at the end of the designated period will be transferred to unrestricted accounts of the Company and can then be used for general corporate purposes. The Company has until January 10, 2022 to use the remaining restricted cash to purchase qualified assets under Section 1031.

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:

	September 30,		December 31,
	2021		2020
	(Dollars in Millions)
Cash and cash equivalents	$	2,381.4	$	207.3
Restricted cash		1.7		97.1
Total cash, cash equivalents and restricted cash presented in the consolidated statements of cash flows	$	2,383.1	$	304.4

New Accounting Pronouncement

In March 2020, the FASB issued Accounting Standards Update (ASU) 2020-04, “Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting”, an optional guidance for a limited period of time to ease the transition from the London interbank offered rate (“LIBOR”) to an alternative reference rate. The

ASU intends to address certain concerns relating to accounting for contract modifications and hedge accounting. These optional expedients and exceptions to applying U.S. GAAP, assuming certain criteria are met, are allowed through December 31, 2022, and any amendments should be applied on a prospective basis. The Company does not expect the transition from LIBOR to have a material impact on its consolidated financial statements.

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.