CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ (766)	$ 1,715
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax	70	14
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax	16	49
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, after Tax	1	26
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	(116)	29
Other Comprehensive Income/(Loss)	(29)	118
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	(795)	1,833
Net Income (Loss) Attributable to Noncontrolling Interest	9	5
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ (804)	$ 1,828