Equity - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 27,698	$ 25,786	$ 22,761
Other comprehensive income/(loss)	114	(44)	37
Ending balance	28,969	27,698	25,786
Total
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(338)	(294)	(331)
Other comprehensive income/(loss)	121	(41)	34
Income tax benefit/(expense)	(7)	(3)	3
Other comprehensive income/(loss)	114	(44)	37
Ending balance	(224)	(338)	(294)
Foreign currency translation adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(285)	(230)	(278)
Other comprehensive income/(loss)	99	(55)	49
Income tax benefit/(expense)	0	0	(1)
Other comprehensive income/(loss)	99	(55)	48
Ending balance	(186)	(285)	(230)
Comprehensive income from equity method investment
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	9	2	2
Other comprehensive income/(loss)	1	9	0
Income tax benefit/(expense)	(1)	(2)	0
Other comprehensive income/(loss)	0	7	0
Ending balance	9	9	2
Employee benefit plans adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(62)	(66)	(55)
Other comprehensive income/(loss)	21	5	(15)
Income tax benefit/(expense)	(6)	(1)	4
Other comprehensive income/(loss)	15	4	(11)
Ending balance	$ (47)	$ (62)	$ (66)