SCHEDULE II - Valuation and Qualifying Accounts

12 Months Ended

Dec. 31, 2019

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, 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	(a)		168.6
Year ended December 31, 2018
Allowance for doubtful accounts	$	2.4	$	0.9	$	—		$	—		$	3.3
Allowance for uncollectible notes receivable		0.2		—		—			0.2	(b)		—
Inventory valuation allowance		144.0		36.9		5.1	(c)		26.8	(a)		159.2
Year ended December 31, 2017
Allowance for doubtful accounts	$	6.3	$	—	$	—		$	3.9	(b)	$	2.4
Allowance for uncollectible notes receivable		0.4		—		—			0.2	(b)		0.2
Inventory valuation allowance		134.9		38.5		—			29.4	(a)		144.0

^(a) Sale of reserved inventory and divestitures

^(b) Write-off of uncollectible accounts and change in estimates

^(c) Application of reserve policy to acquired inventories