CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 1,366	$ 1,912	$ 4,520	$ 3,789
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax	38	5	24	71
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax	1,116	22	1,204	194
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, after Tax	4	2	43	(31)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	0	(21)	28	(237)
Other Comprehensive Income/(Loss)	1,158	8	1,299	(3)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	2,524	1,920	5,819	3,786
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	13	11	25	29
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ 2,511	$ 1,909	$ 5,794	$ 3,757