Financial Instruments - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Derivative [Line Items]
Interest rate cap, fair value	$ 1.0		$ 1.0
Unrealized (loss) gain from hedge accounting	(0.2)	$ (8.3)
Interest Rate Cap
Derivative [Line Items]
Notional amount	2,800.0		$ 2,800.0
Interest Rate Contract
Derivative [Line Items]
Unrealized (loss) gain from hedge accounting		(8.0)
Amount expected to be reclassified from AOCL to interest expense in next twelve months	7.0
Derivative
Derivative [Line Items]
Interest income (expense) reclassified into earnings	(1.0)	$ (2.0)
Cap agreement effective 12/31/20-12/31/22
Derivative [Line Items]
Notional amount	1,400.0
Cap agreement effective 12/31/18-12/31/20
Derivative [Line Items]
Notional amount	$ 1,400.0