CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Millions		Total	Capital Stock	Cap. In Excess of Par Value of Stock	Retained Earnings	Accumulated Other Comprehensive Income/(Loss) (Note 18)	Treasury Stock	Total	Equity Attributable to Non-controlling Interests	Cumulative Effect, Period of Adoption, Adjustment	Cumulative Effect, Period of Adoption, Adjustment Capital Stock	Cumulative Effect, Period of Adoption, Adjustment Cap. In Excess of Par Value of Stock	Cumulative Effect, Period of Adoption, Adjustment Retained Earnings	Cumulative Effect, Period of Adoption, Adjustment Accumulated Other Comprehensive Income/(Loss) (Note 18)	Cumulative Effect, Period of Adoption, Adjustment Treasury Stock	Cumulative Effect, Period of Adoption, Adjustment Total	Cumulative Effect, Period of Adoption, Adjustment Equity Attributable to Non-controlling Interests
Beginning balance at Dec. 31, 2018		$ 35,966	$ 41	$ 22,006	$ 22,668	$ (7,366)	$ (1,417)	$ 35,932	$ 34	$ 13	$ 0	$ 0	$ 13	$ 0	$ 0	$ 13	$ 0
Increase (Decrease) in Stockholders' Equity
Net income/(loss)		1,183	0	0	1,146	0	0	1,146	37
Other comprehensive income/(loss), net		(135)	0	0	0	(135)	0	(135)	0
Common stock issued (a)	[1]	20	0	20	0	0	0	20	0
Treasury stock/other		(12)	0	0	0	0	23	23	(35)
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	[2]								0
Dividends and dividend equivalents declared	[2]	(601)	0	0	(601)	0	0	(601)
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
Per share dividend of Common and Class B Stock		$ 0.15
Beginning balance at Dec. 31, 2018		$ 35,966	41	22,006	22,668	(7,366)	(1,417)	35,932	34	13	0	0	13	0	0	13	0
Increase (Decrease) in Stockholders' Equity
Net income/(loss)		1,756
Other comprehensive income/(loss), net		(476)
Ending balance at Sep. 30, 2019		35,387	41	22,179	22,590	(7,842)	(1,619)	35,349	38
Beginning balance at Mar. 31, 2019		36,434	41	22,026	23,226	(7,501)	(1,394)	36,398	36
Increase (Decrease) in Stockholders' Equity
Net income/(loss)		150	0	0	148	0	0	148	2
Other comprehensive income/(loss), net		65	0	0	0	65	0	65	0
Common stock issued (a)	[1]	85	0	85	0	0	0	85	0
Treasury stock/other		7	0	0	0	0	6	6	1
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	[2]								0
Dividends and dividend equivalents declared	[2]	(605)	0	0	(605)	0	0	(605)
Ending balance at Jun. 30, 2019		$ 36,136	41	22,111	22,769	(7,436)	(1,388)	36,097	39
Increase (Decrease) in Stockholders' Equity
Per share dividend of Common and Class B Stock		$ 0.15
Net income/(loss)		$ 423	0	0	425	0	0	425	(2)
Other comprehensive income/(loss), net		(406)	0	0	0	(406)	0	(406)	0
Common stock issued (a)	[1]	68	0	68	0	0	0	68	0
Treasury stock/other		(230)	0	0	0	0	(231)	(231)	1
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	[2]								0
Dividends and dividend equivalents declared	[2]	(604)	0	0	(604)	0	0	(604)
Ending balance at Sep. 30, 2019		$ 35,387	41	22,179	22,590	(7,842)	(1,619)	35,349	38
Increase (Decrease) in Stockholders' Equity
Per share dividend of Common and Class B Stock		$ 0.15
Beginning balance at Dec. 31, 2019		$ 33,230	41	22,165	20,320	(7,728)	(1,613)	33,185	45	(202)	0	0	(202)	0	0	(202)	0
Increase (Decrease) in Stockholders' Equity
Net income/(loss)		(1,993)	0	0	(1,993)	0	0	(1,993)	0
Other comprehensive income/(loss), net		(733)	0	0	0	(733)	0	(733)	0
Common stock issued (a)	[1]	(15)	0	(15)	0	0	0	(15)	0
Treasury stock/other		9	0	0	0	0	6	6	3
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	[2]								0
Dividends and dividend equivalents declared	[2]	(598)	0	0	(598)	0	0	(598)
Ending balance at Mar. 31, 2020		$ 29,698	41	22,150	17,527	(8,461)	(1,607)	29,650	48
Increase (Decrease) in Stockholders' Equity
Per share dividend of Common and Class B Stock		$ 0.15
Beginning balance at Dec. 31, 2019		$ 33,230	41	22,165	20,320	(7,728)	(1,613)	33,185	45	$ (202)	$ 0	$ 0	$ (202)	$ 0	$ 0	$ (202)	$ 0
Increase (Decrease) in Stockholders' Equity
Net income/(loss)		1,515
Other comprehensive income/(loss), net		(886)
Ending balance at Sep. 30, 2020		33,161	41	22,262	21,031	(8,613)	(1,596)	33,125	36
Beginning balance at Mar. 31, 2020		29,698	41	22,150	17,527	(8,461)	(1,607)	29,650	48
Increase (Decrease) in Stockholders' Equity
Net income/(loss)		1,118	0	0	1,117	0	0	1,117	1
Other comprehensive income/(loss), net		(10)	0	0	0	(10)	0	(10)	0
Common stock issued (a)	[1]	60	0	60	0	0	0	60	0
Treasury stock/other		(12)	0	0	0	0	6	6	(18)
Ending balance at Jun. 30, 2020		30,855	41	22,210	18,645	(8,471)	(1,601)	30,824	31
Increase (Decrease) in Stockholders' Equity
Dividend Equivalents, Forfeitures	[2]	1			1			1
Net income/(loss)		2,390	0	0	2,385	0	0	2,385	5
Other comprehensive income/(loss), net		(143)	0	0	0	(142)	0	(142)	(1)
Common stock issued (a)	[1]	52	0	52	0	0	0	52	0
Treasury stock/other		6	0	0	0	0	5	5	1
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders									0
Dividends and dividend equivalents declared			0	0		0	0
Ending balance at Sep. 30, 2020		33,161	$ 41	$ 22,262	21,031	$ (8,613)	$ (1,596)	33,125	$ 36
Increase (Decrease) in Stockholders' Equity
Dividend Equivalents, Forfeitures	[2]	$ 1			$ 1			$ 1

[1] Includes impacts of share-based compensation.

[2] Dividends and dividend equivalents declared for Common and Class B Stock.