Fair Value Disclosure Fair Value Disclosure - Impact of Cash Flow and Hedge Accounting Relationships (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest expense, net	$ (46.5)	$ (39.9)
Other (expense) income	(3.2)	(1.3)
Interest Expense [Member]
Gain (loss) on fair value hedging relationships
Gain (loss) on non-designated derivative contracts	0.0	0.0
Interest Expense [Member] | Interest Rate Contract [Member]
Gain (loss) on fair value hedging relationships
Hedged items	(3.2)	5.8
Derivatives designated as hedging instruments	3.2	(5.8)
Interest Expense [Member] | Interest Rate Contract [Member] | Cash Flow Hedging [Member]
Gain (loss) on fair value hedging relationships
Amount of gain (loss) reclassified from accumulated other comprehensive income into income	(0.8)	(1.1)
Interest Expense [Member] | Foreign Exchange Contract [Member] | Cash Flow Hedging [Member]
Gain (loss) on fair value hedging relationships
Amount of gain (loss) reclassified from accumulated other comprehensive income into income	0.0	0.0
Other (Income) Expense [Member]
Gain (loss) on fair value hedging relationships
Gain (loss) on non-designated derivative contracts	(0.8)	0.7
Other (Income) Expense [Member] | Interest Rate Contract [Member]
Gain (loss) on fair value hedging relationships
Hedged items	0.0	0.0
Derivatives designated as hedging instruments	0.0	0.0
Other (Income) Expense [Member] | Interest Rate Contract [Member] | Cash Flow Hedging [Member]
Gain (loss) on fair value hedging relationships
Amount of gain (loss) reclassified from accumulated other comprehensive income into income	0.0	0.0
Other (Income) Expense [Member] | Foreign Exchange Contract [Member] | Cash Flow Hedging [Member]
Gain (loss) on fair value hedging relationships
Amount of gain (loss) reclassified from accumulated other comprehensive income into income	$ 11.0	$ (8.2)