Equity, Changes in Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Changes in Accumulated Other Comprehensive Loss, By Component, Net of Tax
Balance as of beginning of period	$ 27,994	$ 22,733	$ 25,468	$ 19,817
Other comprehensive income (loss)	(393)	(538)	0	(952)
Balance as of end of period	28,057	23,715	28,057	23,715
Accumulated Other Comprehensive Loss [Member]
Changes in Accumulated Other Comprehensive Loss, By Component, Net of Tax
Balance as of beginning of period	(971)	(1,425)	(1,359)	(1,008)
Other comprehensive income (loss) before reclassifications	(392)	(576)	51	(1,121)
Amounts reclassified from accumulated other comprehensive  loss	40	4	(18)	130
Effect of exchange rates	(2)	0	1	2
Other comprehensive income (loss)	(354)	(572)	34	(989)
Balance as of end of period	(1,325)	(1,997)	(1,325)	(1,997)
Foreign Currency Translation Adjustment [Member]
Changes in Accumulated Other Comprehensive Loss, By Component, Net of Tax
Balance as of beginning of period	(774)	(991)	(1,168)	(562)
Other comprehensive income (loss) before reclassifications	(315)	(606)	79	(1,035)
Amounts reclassified from accumulated other comprehensive  loss	0	0	0	0
Effect of exchange rates	0	0	0	0
Other comprehensive income (loss)	(315)	(606)	79	(1,035)
Balance as of end of period	(1,089)	(1,597)	(1,089)	(1,597)
Defined Benefit Plans Items [Member]
Changes in Accumulated Other Comprehensive Loss, By Component, Net of Tax
Balance as of beginning of period	(193)	(430)	(183)	(441)
Other comprehensive income (loss) before reclassifications	0	0	0	(2)
Amounts reclassified from accumulated other comprehensive  loss	(7)	7	(20)	18
Effect of exchange rates	(2)	0	1	2
Other comprehensive income (loss)	(9)	7	(19)	18
Balance as of end of period	(202)	(423)	(202)	(423)
Gains (Losses) on Cash Flow Hedges [Member]
Changes in Accumulated Other Comprehensive Loss, By Component, Net of Tax
Balance as of beginning of period	(4)	(4)	(8)	(5)
Other comprehensive income (loss) before reclassifications	(77)	30	(28)	(84)
Amounts reclassified from accumulated other comprehensive  loss	47	(3)	2	112
Effect of exchange rates	0	0	0	0
Other comprehensive income (loss)	(30)	27	(26)	28
Balance as of end of period	$ (34)	$ 23	$ (34)	$ 23