Revenue (Narrative) (Details) - USD ($) $ in Millions		3 Months Ended								12 Months Ended
	Jan. 01, 2018	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net sales		$ 1,816.7	$ 1,981.4	$ 1,948.0	$ 1,777.8	$ 1,862.2	$ 1,870.3	$ 1,832.3	$ 1,637.7	$ 7,523.9	$ 7,202.5	$ 6,631.2
Increase in retained earnings		694.0				678.1				694.0	678.1
Total income tax provision										55.0	35.4	$ 95.6
Contract asset (liabilites)
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net sales											0.2
Increase in retained earnings	$ 0.8					$ 0.9					$ 0.9
Total income tax provision	$ (0.3)