SCHEDULE II - Valuation and Qualifying Accounts

12 Months Ended

Dec. 31, 2021

Valuation And Qualifying Accounts [Abstract]

SCHEDULE II - Valuation and Qualifying Accounts

SCHEDULE II – VALUATION AND QUALIFYING ACCOUNTS

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

Col A	Col B		Col C					Col D			Col E
			Additions
Description	Balance at beginning of period		(1) Charged to costs and expenses		(2) Charged to other accounts- describe			Deductions- describe			Balance at end of period
	(Amounts in Millions)
Year ended December 31, 2021
Allowance for estimated credit losses	$	5.9	$	—	$	—		$	0.1	(a)	$	5.8
Allowance for estimated credit losses on    notes receivable		0.4		—		—			0.3	(a)		0.1
Inventory valuation allowance		180.3		65.2		9.6	(b)		40.8	(c)		214.3
Year ended December 31, 2020
Allowance for estimated credit losses	$	4.7	$	1.2	$	—		$	—		$	5.9
Allowance for estimated credit losses on    notes receivable		—		0.4		—			—			0.4
Inventory valuation allowance		168.6		51.3		—			39.6	(c)		180.3
Year ended December 31, 2019
Allowance for doubtful accounts	$	3.3	$	1.4	$	—		$	—		$	4.7
Allowance for uncollectible notes receivable		—		—		—			—			—
Inventory valuation allowance		159.2		38.8		—			29.4	(c)		168.6

^(a) Change in estimates

^(b) Application of reserve policy to acquired inventories/customer receivables

^(c) Sale of reserved inventory and divestitures