Recent Accounting Pronouncements Recent Accounting Pronouncements (Impact of Adoption - ASU 2014-09) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019
Item Effected [Line Items]
Cost of sales	$ 1,705.5	$ 1,918.9	$ 3,418.6	$ 3,609.2
Income tax (benefit) provision	(19.4)	116.4	(9.5)	26.9
Net earnings (loss)	39.4	(168.5)	60.2	(193.5)
Revenues	2,731.2	2,851.5	5,350.4	5,347.0
Prepaid expenses and other current assets	602.1		602.1			$ 552.0
Income taxes payable	288.0		288.0			213.0
Retained earnings	6,091.5		6,091.5			6,031.1
Accumulated other comprehensive loss	$ (2,024.9)	$ (1,541.7)	$ (2,024.9)	$ (1,541.7)	$ (2,453.5)	$ (1,797.2)	$ (1,710.5)