Derivative Instruments and Hedging Activities (Schedule of Location of Hedging Activities) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivative instruments	$ (14)	$ (3)
Interest Expense
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivative instruments	(9)	(4)
Interest Expense | Interest expense - interest rate caps
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivative instruments	(3)	(2)
Interest Expense | Interest expense - interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivative instruments	(6)	(2)
Cost of product sales | Cost of product sales - commodity swaps
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivative instruments	$ (5)	$ 1