Financial Instruments - Derivatives and Hedging (Notional Amount) (Details)	6 Months Ended		12 Months Ended
	Jun. 30, 2020 USD ($) derivative_instrument	Jun. 30, 2019 USD ($)	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	$ 12,100,000
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