Equity - Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 16,726	$ 18,163	$ 34,414
Other comprehensive income (loss) before reclassifications	(293)	(220)
Amounts reclassified from accumulated other comprehensive loss	55	70
Deferred taxes	(43)	(1)
Other comprehensive income (loss)	(281)	(151)	44
Less: Other comprehensive loss attributable to noncontrolling interests	(1)	(2)	(3)
Ending balance	14,659	16,726	18,163
Foreign Currency Translation Adjustment, Parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(2,398)	(2,096)
Ending balance	(2,665)	(2,398)	(2,096)
Foreign Currency Translation Adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Other comprehensive income (loss) before reclassifications	(294)	(344)
Amounts reclassified from accumulated other comprehensive loss	25	39
Deferred taxes	0	0
Other comprehensive income (loss)	(269)	(305)
Foreign Currency Translation Adjustment, Noncontrolling Interest
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Less: Other comprehensive loss attributable to noncontrolling interests	(2)	(2)
Cash Flow Hedges, Parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(12)	5
Ending balance	(10)	(12)	5
Cash Flow Hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Other comprehensive income (loss) before reclassifications	(1)	(11)
Amounts reclassified from accumulated other comprehensive loss	3	(7)
Deferred taxes	0	2
Other comprehensive income (loss)	2	(16)
Cash Flow Hedges, Noncontrolling Interest
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Less: Other comprehensive loss attributable to noncontrolling interests	0	0
Benefit Plans, Parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(281)	(451)
Ending balance	(296)	(281)	(451)
Benefit Plans
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Other comprehensive income (loss) before reclassifications	2	135
Amounts reclassified from accumulated other comprehensive loss	27	38
Deferred taxes	(43)	(3)
Other comprehensive income (loss)	(14)	170
Benefit Plans, Noncontrolling Interest
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Less: Other comprehensive loss attributable to noncontrolling interests	1	0
Accumulated Other Comprehensive Loss
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(2,691)	(2,542)	(2,589)
Other comprehensive income (loss)	(280)	(149)	47
Ending balance	$ (2,971)	$ (2,691)	$ (2,542)