Equity, Changes in Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Changes in Accumulated Other Comprehensive Loss by Component, Net of Tax
Balance as of beginning of period	$ 27,521	$ 28,524	$ 25,468
Other comprehensive income (loss)	817	(447)	535
Balance as of end of period	26,605	27,521	28,524
Accumulated Other Comprehensive Loss [Member]
Changes in Accumulated Other Comprehensive Loss by Component, Net of Tax
Balance as of beginning of period	(1,272)	(870)	(1,359)
Other comprehensive income (loss) before reclassifications	792	(345)	507
Amounts reclassified from accumulated other comprehensive  loss	5	(55)	(21)
Effect of exchange rates	6	(2)	3
Other comprehensive income (loss)	803	(402)	489
Balance as of end of period	(469)	(1,272)	(870)
Foreign Currency Translation Adjustment [Member]
Changes in Accumulated Other Comprehensive Loss by Component, Net of Tax
Balance as of beginning of period	(1,264)	(735)	(1,168)
Other comprehensive income (loss) before reclassifications	662	(529)	433
Amounts reclassified from accumulated other comprehensive  loss	0	0	0
Effect of exchange rates	0	0	0
Other comprehensive income (loss)	662	(529)	433
Balance as of end of period	(602)	(1,264)	(735)
Defined Benefit Plans Items [Member]
Changes in Accumulated Other Comprehensive Loss by Component, Net of Tax
Balance as of beginning of period	(2)	(162)	(183)
Other comprehensive income (loss) before reclassifications	129	172	42
Amounts reclassified from accumulated other comprehensive  loss	(3)	(10)	(24)
Effect of exchange rates	6	(2)	3
Other comprehensive income (loss)	132	160	21
Balance as of end of period	130	(2)	(162)
Gains (Losses) on Cash Flow Hedges [Member]
Changes in Accumulated Other Comprehensive Loss by Component, Net of Tax
Balance as of beginning of period	(6)	27	(8)
Other comprehensive income (loss) before reclassifications	1	12	32
Amounts reclassified from accumulated other comprehensive  loss	8	(45)	3
Effect of exchange rates	0	0	0
Other comprehensive income (loss)	9	(33)	35
Balance as of end of period	$ 3	$ (6)	$ 27