CONSOLIDATED STATEMENT OF EQUITY - USD ($) $ in Millions	Total	Capital Stock [Member]	Capital in Excess of Par Value of Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Parent [Member]	Equity Attributable to Non-controlling Interests [Member]
Common Stock, Dividends, Per Share, Declared	$ 0.28
Total equity/(deficit), beginning balance at Dec. 31, 2017	$ 35,606	$ 41	$ 21,843	$ 21,906	$ (6,959)	$ (1,253)	$ 35,578	$ 28
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,745			1,736			1,736	9
Other comprehensive income/(loss), net of tax	289				290		290	(1)
Common stock issued (including share-based compensation impacts)	(2)		(2)				(2)
Treasury stock/other	(89)					(89)	(89)	0
Total equity/(deficit), ending balance at Mar. 31, 2018	36,436	41	21,841	22,529	(6,669)	(1,342)	36,400	36
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends, Common Stock, Cash	$ 1,113			1,113			1,113
Common Stock, Dividends, Per Share, Declared	$ 0.15
Total equity/(deficit), beginning balance at Dec. 31, 2018	$ 35,966	41	22,006	22,668	(7,366)	(1,417)	35,932	34
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,183			1,146			1,146	37
Other comprehensive income/(loss), net of tax	(135)				(135)		(135)
Common stock issued (including share-based compensation impacts)	20		20				20
Treasury stock/other	(12)					23	23	(35)
Dividends	(601)			(601)			(601)
Total equity/(deficit), ending balance at Mar. 31, 2019	36,434	$ 41	$ 22,026	23,226	$ (7,501)	$ (1,394)	36,398	$ 36
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative Effect of New Accounting Principle in Period of Adoption	$ 13			$ 13			$ 13