Equity - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 23,211	$ 22,703	$ 22,761	$ 22,748
Other comprehensive income (loss)	31	(85)		(110)
Income tax benefit/(expense)	0	1		1
Other comprehensive income/(loss)	31	(84)	47	(109)
Ending balance	23,889	22,861	23,889	22,861
Total
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(315)	(221)	(331)	(196)
Other comprehensive income (loss)			47
Income tax benefit/(expense)			0
Other comprehensive income/(loss)	31	(84)	47	(109)
Ending balance	(284)	(305)	(284)	(305)
Foreign currency translation adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(262)	(175)	(278)	(150)
Other comprehensive income (loss)	31	(85)	47	(110)
Income tax benefit/(expense)	0	1	0	1
Other comprehensive income/(loss)	31	(84)	47	(109)
Ending balance	(231)	(259)	(231)	(259)
Comprehensive income from equity method investment
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	2	2	2	2
Other comprehensive income (loss)	0	0	0	0
Income tax benefit/(expense)	0	0	0	0
Other comprehensive income/(loss)	0	0	0	0
Ending balance	2	2	2	2
Employee benefit plans adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(55)	(48)	(55)	(48)
Other comprehensive income (loss)	0	0	0	0
Income tax benefit/(expense)	0	0	0	0
Other comprehensive income/(loss)	0	0	0	0
Ending balance	$ (55)	$ (48)	$ (55)	$ (48)