Changes in Stockholders' Equity (Schedule of Stockholders' Equity) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance beginning of period	$ 4,139.0	$ 3,383.3	$ 3,882.6	$ 3,443.8	$ 3,443.8
Stock compensation	10.2	7.8	37.5	25.4
Issuance of stock awards	(0.3)	0.7	(20.5)	(19.4)
SSARs exercised			(1.2)	(1.0)
Comprehensive income:
Net income (loss)	280.5	237.9	832.3	552.5
Other comprehensive income (loss), net of reclassification adjustments:
Foreign currency translation adjustments	(54.5)	(75.7)	64.1	(61.9)
Defined benefit pension plans, net of tax	1.9	(16.9)	5.6	(13.5)
Deferred gains and losses on derivatives, net of tax	0.5	1.3	(3.5)	(5.2)
Payment of dividends to stockholders	(21.7)	(17.9)	(435.8)	(386.4)
Distributions to noncontrolling interest				(13.8)
Change in noncontrolling interest		0.1		0.1
Balance end of period	4,355.6	3,520.6	4,355.6	3,520.6	$ 3,882.6
Accounting Standards Update [Extensible Enumeration]					Accounting Standards Update 2016-13 [Member]
Cumulative Effect, Period of Adoption, Adjustment
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance beginning of period			(5.5)
Other comprehensive income (loss), net of reclassification adjustments:
Balance end of period					$ (5.5)
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance beginning of period	0.7	0.7	0.7	0.7	0.7
Other comprehensive income (loss), net of reclassification adjustments:
Balance end of period	0.7	0.7	0.7	0.7	0.7
Additional Paid-in Capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance beginning of period	36.1	13.3	30.2	3.9	3.9
Stock compensation	10.2	7.8	37.5	25.4
Issuance of stock awards	(0.3)	0.7	(20.5)	(6.5)
SSARs exercised			(1.2)	(1.0)
Other comprehensive income (loss), net of reclassification adjustments:
Balance end of period	46.0	21.8	46.0	21.8	30.2
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance beginning of period	5,786.8	5,130.3	5,654.6	5,182.2	5,182.2
Issuance of stock awards				(12.9)
Comprehensive income:
Net income (loss)	280.6	237.9	832.4	567.4
Other comprehensive income (loss), net of reclassification adjustments:
Payment of dividends to stockholders	(21.7)	(17.9)	(435.8)	(386.4)
Balance end of period	6,045.7	5,350.3	6,045.7	5,350.3	5,654.6
Retained Earnings | Cumulative Effect, Period of Adoption, Adjustment
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance beginning of period			(5.5)
Other comprehensive income (loss), net of reclassification adjustments:
Balance end of period					(5.5)
Accumulated Other Comprehensive Loss
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance beginning of period	(1,684.8)	(1,761.1)	(1,803.1)	(1,770.9)	(1,770.9)
Other comprehensive income (loss), net of reclassification adjustments:
Foreign currency translation adjustments	(54.5)	(75.7)	64.1	(62.8)
Defined benefit pension plans, net of tax	1.9	(16.9)	5.6	(13.5)
Deferred gains and losses on derivatives, net of tax	0.5	1.3	(3.5)	(5.2)
Balance end of period	(1,736.9)	(1,852.4)	(1,736.9)	(1,852.4)	(1,803.1)
Noncontrolling Interests
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance beginning of period	0.2	0.1	0.2	27.9	27.9
Comprehensive income:
Net income (loss)	(0.1)		(0.1)	(14.9)
Other comprehensive income (loss), net of reclassification adjustments:
Foreign currency translation adjustments		0.0		0.9
Distributions to noncontrolling interest				(13.8)
Change in noncontrolling interest		0.1		0.1
Balance end of period	$ 0.1	$ 0.2	$ 0.1	$ 0.2	$ 0.2