Equity, Changes in Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Changes in Accumulated Other Comprehensive Loss by Component, Net of Tax
Balance as of beginning of period	$ 19,817	$ 19,642	$ 22,536
Other comprehensive income (loss)	(354)	247	99
Balance as of end of period	25,468	19,817	19,642
Accumulated Other Comprehensive Loss [Member]
Changes in Accumulated Other Comprehensive Loss by Component, Net of Tax
Balance as of beginning of period	(1,008)	(1,254)	(1,351)
Other comprehensive income (loss) before reclassifications	(533)	177	69
Amounts reclassified from accumulated other comprehensive  loss	182	67	28
Effect of exchange rates		2
Other comprehensive income (loss)	(351)	246	97
Balance as of end of period	(1,359)	(1,008)	(1,254)
Foreign Currency Translation Adjustment [Member]
Changes in Accumulated Other Comprehensive Loss by Component, Net of Tax
Balance as of beginning of period	(562)	(515)	(676)
Other comprehensive income (loss) before reclassifications	(606)	(47)	161
Amounts reclassified from accumulated other comprehensive  loss	0	0	0
Effect of exchange rates		0
Other comprehensive income (loss)	(606)	(47)	161
Balance as of end of period	(1,168)	(562)	(515)
Defined Benefit Plans Items [Member]
Changes in Accumulated Other Comprehensive Loss by Component, Net of Tax
Balance as of beginning of period	(441)	(737)	(672)
Other comprehensive income (loss) before reclassifications	187	245	(106)
Amounts reclassified from accumulated other comprehensive  loss	71	49	41
Effect of exchange rates		2
Other comprehensive income (loss)	258	296	(65)
Balance as of end of period	(183)	(441)	(737)
Gains (Losses) on Cash Flow Hedges [Member]
Changes in Accumulated Other Comprehensive Loss by Component, Net of Tax
Balance as of beginning of period	(5)	(2)	(3)
Other comprehensive income (loss) before reclassifications	(114)	(21)	14
Amounts reclassified from accumulated other comprehensive  loss	111	18	(13)
Effect of exchange rates		0
Other comprehensive income (loss)	(3)	(3)	1
Balance as of end of period	$ (8)	$ (5)	$ (2)