Derivative Financial Instruments and Risk Management (Details 5) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Gross Amount of Recognized Assets	$ 301	$ 84
Gross Amounts Offset	0	0
Net Amount of Assets	301	84
Gross Amounts Not Offset	(47)	(21)
Net Amount	254	63
Gross Amount of Recognized Liabilities	(60)	(50)
Gross Amounts Offset	0	0
Net Amount of Liabilities	(60)	(50)
Gross Amounts Not Offset	47	21
Net Amount	$ (13)	$ (29)