Financial Instruments and Derivative Financial Instruments - Counterparty (Details) - Cash Flow Hedging [Member] - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Derivative Asset, Fair Value, Gross Asset	$ 25.9	$ 1.8
Derivative Asset, Fair Value, Amount Offset Against Collateral	(2.4)	(1.8)
Derivative Asset	23.5	0.0
Derivative Liability, Fair Value, Gross Liability	7.3	23.7
Derivative Liability, Fair Value, Amount Offset Against Collateral	(2.4)	(1.8)
Derivative Liability	4.9	21.9
Interest Rate Contract [Member]
Derivative Asset, Fair Value, Gross Asset	0.0	0.0
Derivative Asset, Fair Value, Amount Offset Against Collateral	0.0	0.0
Derivative Asset	0.0	0.0
Derivative Liability, Fair Value, Gross Liability	4.9	2.1
Derivative Liability, Fair Value, Amount Offset Against Collateral	0.0	0.0
Derivative Liability	4.9	2.1
Foreign Exchange Contract [Member]
Derivative Asset, Fair Value, Gross Asset	25.9	1.8
Derivative Asset, Fair Value, Amount Offset Against Collateral	(2.4)	(1.8)
Derivative Asset	23.5	0.0
Derivative Liability, Fair Value, Gross Liability	2.4	21.6
Derivative Liability, Fair Value, Amount Offset Against Collateral	(2.4)	(1.8)
Derivative Liability	$ 0.0	$ 19.8