Condensed Consolidated Statements of Changes in Common Shareholders' Equity (Unaudited) - USD ($) $ in Millions		Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	[1]	Total
Balance (in shares) at Dec. 31, 2020		1,112,200,000	(440,900,000)
Balance at Dec. 31, 2020		$ 2,781	$ (40,420)	$ 4,864	$ 51,326	$ (1,593)		$ 16,958
Share repurchase programs (Note 16) (in shares)	[2]							(6,691,421)
Balance (in shares) at Mar. 31, 2021		1,112,500,000	(447,400,000)
Balance at Mar. 31, 2021		$ 2,781	$ (41,826)	4,874	52,019	(1,594)		$ 16,254
Balance (in shares) at Dec. 31, 2020		1,112,200,000	(440,900,000)
Balance at Dec. 31, 2020		$ 2,781	$ (40,420)	4,864	51,326	(1,593)		16,958
Net income		0	0	0	3,139	0		3,139
Other comprehensive income/(loss)		$ 0	$ 0	0	0	42		42	[3]
Conversion, stock option exercises, forfeitures, ESPP, and other [b] (in shares)	[4]	300,000	300,000
Conversion, stock option exercises, forfeitures, ESPP, and other [b]	[4]	$ 0	$ (5)	35	0	0		$ 30
Share repurchase programs (Note 16) (in shares)		0	(18,900,000)					(18,895,830)	[5]
Share repurchase programs (Note 16)		$ 0	$ (4,117)	(400)	0	0		$ (4,517)
Dividends declared		$ 0	$ 0	0	(1,349)	0		(1,349)
Balance (in shares) at Jun. 30, 2021		1,112,500,000	(459,500,000)
Balance at Jun. 30, 2021		$ 2,781	$ (44,542)	4,499	53,116	(1,551)		14,303
Balance (in shares) at Mar. 31, 2021		1,112,500,000	(447,400,000)
Balance at Mar. 31, 2021		$ 2,781	$ (41,826)	4,874	52,019	(1,594)		16,254
Net income		0	0	0	1,798	0		1,798
Other comprehensive income/(loss)		$ 0	$ 0	0	0	43		43	[6]
Conversion, stock option exercises, forfeitures, ESPP, and other [b] (in shares)	[4]	0	100,000
Conversion, stock option exercises, forfeitures, ESPP, and other [b]	[4]	$ 0	$ (1)	25	0	0		$ 24
Share repurchase programs (Note 16) (in shares)		0	(12,200,000)					(12,204,409)
Share repurchase programs (Note 16)		$ 0	$ (2,715)	(400)	0	0		$ (3,115)
Dividends declared		$ 0	$ 0	0	(701)	0		(701)
Balance (in shares) at Jun. 30, 2021		1,112,500,000	(459,500,000)
Balance at Jun. 30, 2021		$ 2,781	$ (44,542)	4,499	53,116	(1,551)		14,303
Balance (in shares) at Dec. 31, 2021		1,112,400,000	(473,600,000)
Balance at Dec. 31, 2021		$ 2,781	$ (47,734)	4,979	55,049	(914)		$ 14,161
Share repurchase programs (Note 16) (in shares)	[2]							(11,014,201)
Balance (in shares) at Mar. 31, 2022		1,112,600,000	(484,400,000)
Balance at Mar. 31, 2022		$ 2,782	$ (50,515)	4,571	55,937	(878)		$ 11,897
Balance (in shares) at Dec. 31, 2021		1,112,400,000	(473,600,000)
Balance at Dec. 31, 2021		$ 2,781	$ (47,734)	4,979	55,049	(914)		14,161
Net income		0	0	0	3,465	0		3,465
Other comprehensive income/(loss)		$ 0	$ 0	0	0	73		73	[3]
Conversion, stock option exercises, forfeitures, ESPP, and other [b] (in shares)	[4]	200,000	200,000
Conversion, stock option exercises, forfeitures, ESPP, and other [b]	[4]	$ 0	$ (21)	63	0	0		$ 42
Share repurchase programs (Note 16) (in shares)		0	(14,100,000)					(14,114,884)	[5]
Share repurchase programs (Note 16)		$ 0	$ (3,463)	(12)	0	0		$ (3,475)
Dividends declared		$ 0	$ 0	0	(1,556)	0		(1,556)
Balance (in shares) at Jun. 30, 2022		1,112,600,000	(487,500,000)
Balance at Jun. 30, 2022		$ 2,781	$ (51,218)	5,030	56,958	(841)		12,710
Balance (in shares) at Mar. 31, 2022		1,112,600,000	(484,400,000)
Balance at Mar. 31, 2022		$ 2,782	$ (50,515)	4,571	55,937	(878)		11,897
Net income		0	0	0	1,835	0		1,835
Other comprehensive income/(loss)		$ 0	$ 0	0	0	37		37	[6]
Conversion, stock option exercises, forfeitures, ESPP, and other [b] (in shares)	[4]	0	0
Conversion, stock option exercises, forfeitures, ESPP, and other [b]	[4]	$ (1)	$ 7	31	0	0		$ 37
Share repurchase programs (Note 16) (in shares)		0	(3,100,000)					(3,100,683)
Share repurchase programs (Note 16)		$ 0	$ (710)	428	0	0		$ (282)
Dividends declared		$ 0	$ 0	0	(814)	0		(814)
Balance (in shares) at Jun. 30, 2022		1,112,600,000	(487,500,000)
Balance at Jun. 30, 2022		$ 2,781	$ (51,218)	$ 5,030	$ 56,958	$ (841)		$ 12,710

[1] AOCI = Accumulated Other Comprehensive Income/Loss (Note 9)

[2] Includes 7,012,232 shares repurchased in 2022 under accelerated share repurchase programs.

[3] Net of deferred taxes of ($11) million and ($18) million during the six months ended June 30, 2022 and 2021, respectively.

[4] ESPP = employee stock purchase plan (Note 4)

[5] Includes 1,847,185 and 7,209,156 shares repurchased in 2022 and 2021, respectively, under accelerated share repurchase programs.

[6] Net of deferred taxes of ($6) million and ($10) million during the three months ended June 30, 2022 and 2021, respectively.