Income Taxes, Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Current:
Country	$ 2,913	$ 283	$ (1,067)
U.S. state / Canadian provincial	465	98	6
Total current	3,378	381	(1,061)
Deferred:
Country	26	(58)	179
U.S. state / Canadian provincial	24	(68)	(21)
Total deferred	50	(126)	158
Income tax expense (benefit)	3,428	255	(903)
U.S. [Member]
Current:
Country	2,147	68	(1,033)
U.S. state / Canadian provincial	153	1	9
Total current	2,300	69	(1,024)
Deferred:
Country	164	5	126
U.S. state / Canadian provincial	80	(24)	(51)
Total deferred	244	(19)	75
Income tax expense (benefit)	2,544	50	(949)
Foreign [Member]
Current:
Country	766	215	(34)
U.S. state / Canadian provincial	312	97	(3)
Total current	1,078	312	(37)
Deferred:
Country	(138)	(63)	53
U.S. state / Canadian provincial	(56)	(44)	30
Total deferred	(194)	(107)	83
Income tax expense (benefit)	$ 884	$ 205	$ 46