Equity, Changes in Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Changes in Accumulated Other Comprehensive Loss, By Component, Net of Tax
Balance as of beginning of period	$ 25,468	$ 19,817
Other comprehensive income (loss)	183	(24)
Balance as of end of period	27,067	20,410
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)
Other comprehensive income (loss) before reclassifications	174	(54)
Amounts reclassified from accumulated other comprehensive  loss	(22)	53
Effect of exchange rates	2	0
Other comprehensive income (loss)	154	(1)
Balance as of end of period	(1,205)	(1,009)
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)
Other comprehensive income (loss) before reclassifications	137	13
Amounts reclassified from accumulated other comprehensive  loss	0	0
Effect of exchange rates	0	0
Other comprehensive income (loss)	137	13
Balance as of end of period	(1,031)	(549)
Defined Benefit Plans Items [Member]
Changes in Accumulated Other Comprehensive Loss, By Component, Net of Tax
Balance as of beginning of period	(183)	(441)
Other comprehensive income (loss) before reclassifications	0	(3)
Amounts reclassified from accumulated other comprehensive  loss	(7)	7
Effect of exchange rates	2	0
Other comprehensive income (loss)	(5)	4
Balance as of end of period	(188)	(437)
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)
Other comprehensive income (loss) before reclassifications	37	(64)
Amounts reclassified from accumulated other comprehensive  loss	(15)	46
Effect of exchange rates	0	0
Other comprehensive income (loss)	22	(18)
Balance as of end of period	$ 14	$ (23)