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	$ 0.0	5.6	0.0	0.0	5.6	0.0
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)						0.0
Ending Balance, Total Equity at Jun. 30, 2021	6,128.2	$ 0.6	3,451.1	(153.0)	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	(153.0)	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	(50.0)				(50.0)	(50.0)
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	6,770.0	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	$ 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	$ 6,770.0	$ 2.1
Ending Balance (in shares) at Jun. 30, 2022	62,400,000	62,400,000