Consolidated Statement of Changes in Equity - USD ($) $ in Millions	Total		Common Stock [Member]	Capital in excess of par	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]	Noncontrolling Interest [Member]
Beginning Balance at Dec. 31, 2016	$ 35,226		$ 18	$ 46,507	$ (36,906)	$ (6,193)	$ 31,548	$ 252
Net income (loss)	(793)						(855)	62
Other comprehensive income (loss)	675					675
Dividends paid	(1,305)						(1,305)
Treasury Stock Value Acquired Cost Method	(3,000)				(3,000)
Distributions to noncontrolling interests and other	(120)							(120)
Distributed under benefit plans	115			115
Other	3						3
Ending Balance at Dec. 31, 2017	30,801		18	46,622	(39,906)	(5,518)	29,391	194
Net income (loss)	6,305						6,257	48
Other comprehensive income (loss)	(603)					(603)
Dividends paid	(1,363)						(1,363)
Treasury Stock Value Acquired Cost Method	(2,999)				(2,999)
Distributions to noncontrolling interests and other	(121)							(121)
Distributed under benefit plans	257			257
Changes in Accounting Principles	(220)					58	(278)
Other	7						3	4
Ending Balance at Dec. 31, 2018	32,064		18	46,879	(42,905)	(6,063)	34,010	125
Net income (loss)	7,257						7,189	68
Other comprehensive income (loss)	746					746
Dividends paid	(1,500)						(1,500)
Treasury Stock Value Acquired Cost Method	(3,500)				(3,500)
Distributions to noncontrolling interests and other	(128)							(128)
Distributed under benefit plans	104			104
Changes in Accounting Principles	0					(40)	40
Other	7						3	4
Ending Balance at Dec. 31, 2019	$ 35,050	[1]	$ 18	$ 46,983	$ (46,405)	$ (5,357)	$ 39,742	$ 69

[1]   *We adopted ASU No. 2016-01, "Recognition and Measurement of Financial Assets and Liabilities," beginning   January 1, 2018.