Equity, Changes in Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Changes in Accumulated Other Comprehensive Loss by Component, Net of Tax
Balance as of beginning of period	$ 25,468	$ 19,817	$ 19,642
Other comprehensive income (loss)	535	(354)	247
Balance as of end of period	28,524	25,468	19,817
Accumulated Other Comprehensive Loss [Member]
Changes in Accumulated Other Comprehensive Loss by Component, Net of Tax
Balance as of beginning of period	(1,359)	(1,008)	(1,254)
Other comprehensive income (loss) before reclassifications	507	(533)	177
Amounts reclassified from accumulated other comprehensive  loss	(21)	182	67
Effect of exchange rates	3		2
Other comprehensive income (loss)	489	(351)	246
Balance as of end of period	(870)	(1,359)	(1,008)
Foreign Currency Translation Adjustment [Member]
Changes in Accumulated Other Comprehensive Loss by Component, Net of Tax
Balance as of beginning of period	(1,168)	(562)	(515)
Other comprehensive income (loss) before reclassifications	433	(606)	(47)
Amounts reclassified from accumulated other comprehensive  loss	0	0	0
Effect of exchange rates	0		0
Other comprehensive income (loss)	433	(606)	(47)
Balance as of end of period	(735)	(1,168)	(562)
Defined Benefit Plans Items [Member]
Changes in Accumulated Other Comprehensive Loss by Component, Net of Tax
Balance as of beginning of period	(183)	(441)	(737)
Other comprehensive income (loss) before reclassifications	42	187	245
Amounts reclassified from accumulated other comprehensive  loss	(24)	71	49
Effect of exchange rates	3		2
Other comprehensive income (loss)	21	258	296
Balance as of end of period	(162)	(183)	(441)
Gains (Losses) on Cash Flow Hedges [Member]
Changes in Accumulated Other Comprehensive Loss by Component, Net of Tax
Balance as of beginning of period	(8)	(5)	(2)
Other comprehensive income (loss) before reclassifications	32	(114)	(21)
Amounts reclassified from accumulated other comprehensive  loss	3	111	18
Effect of exchange rates	0		0
Other comprehensive income (loss)	35	(3)	(3)
Balance as of end of period	$ 27	$ (8)	$ (5)