Fair Value Disclosure Fair Value Disclosure - Impacts of Derivative Instrument on Statement of Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest Expense	$ (46.8)	$ (46.5)
Amount of Loss (Gain) Reclassified from Accumulated Other Comprehensive Income into Income	(4.9)	(10.2)
Other Nonoperating Income (Expense)	(8.2)	(3.2)
Cash Flow Hedging [Member] | Interest Rate Contract [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of Loss (Gain) Recognized in Other Comprehensive Income	(0.1)	0.0
Cash Flow Hedging [Member] | Foreign Exchange Contract [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of Loss (Gain) Recognized in Other Comprehensive Income	(3.9)	(12.9)
Interest Expense [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of Loss (Gain) Reclassified from Accumulated Other Comprehensive Income into Income	0.4	0.8
Gain (loss) on non-designated derivative contracts	0.0	0.0
Interest Expense [Member] | Interest Rate Contract [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Hedged items	(6.9)	(3.2)
Derivatives designated as hedging instruments	6.9	3.2
Interest Expense [Member] | Cash Flow Hedging [Member] | Interest Rate Contract [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of gain (loss) reclassified from accumulated other comprehensive income into income	(0.4)	(0.8)
Interest Expense [Member] | Cash Flow Hedging [Member] | Foreign Exchange Contract [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of gain (loss) reclassified from accumulated other comprehensive income into income	0.0	0.0
Other (Income) Expense [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of Loss (Gain) Reclassified from Accumulated Other Comprehensive Income into Income	(5.3)	(11.0)
Gain (loss) on non-designated derivative contracts	6.9	(0.8)
Other (Income) Expense [Member] | Interest Rate Contract [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Hedged items	0.0	0.0
Derivatives designated as hedging instruments	0.0	0.0
Other (Income) Expense [Member] | Cash Flow Hedging [Member] | Interest Rate Contract [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of gain (loss) reclassified from accumulated other comprehensive income into income	0.0	0.0
Other (Income) Expense [Member] | Cash Flow Hedging [Member] | Foreign Exchange Contract [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of gain (loss) reclassified from accumulated other comprehensive income into income	$ 5.3	$ 11.0