Derivative Financial Instruments and Risk Management (Details 5) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Gross Amount of Recognized Assets	$ 153	$ 112
Gross Amounts Offset	0	0
Net Amount of Assets	153	112
Gross Amounts Not Offset	(39)	(34)
Net Amount	114	78
Gross Amount of Recognized Liabilities	(81)	(63)
Gross Amounts Offset	0	0
Net Amount of Liabilities	(81)	(63)
Gross Amounts Not Offset	39	34
Net Amount	$ (42)	$ (29)