Financial Instruments - Derivatives and Hedging (Notional Amount) (Details)	3 Months Ended	9 Months Ended
	Mar. 31, 2020 derivative_instrument	Sep. 30, 2020 USD ($) derivative_instrument	Sep. 30, 2019 USD ($)	Dec. 31, 2019 USD ($) derivative_instrument
Maximum
Derivative [Line Items]
Amount expected to be reclassified from accumulated other comprehensive loss in the next twelve months		$ 11,300,000
Interest Rate Swap | Designated as Hedging Instrument
Derivative [Line Items]
Number of instruments entered | derivative_instrument	0	0
Number of Instruments | derivative_instrument		7		7
Notional Amount		$ 800,000,000		$ 800,000,000
Gain (loss) on derivative		$ 0	$ 0