Equity (Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ 60,305	$ 58,936	$ 60,460	$ 57,768
Net other comprehensive income (loss)	44	(6)	56	(25)
Ending balance	60,883	59,436	60,883	59,436
Net Unrealized Gains on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	23	22	23	22
Other comprehensive income (loss), before reclassifications	0	0	0	0
Amounts reclassified from AOCI	1	0	1	0
Net other comprehensive income (loss)	1	0	1	0
Less other comprehensive (income) loss attributable to noncontrolling interests		0		0
Ending balance	24	22	24	22
Net Unrealized Gains (Losses) on Available for Sale Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(25)	(44)	(37)	(39)
Other comprehensive income (loss), before reclassifications	9	(3)	18	(9)
Amounts reclassified from AOCI	1	4	4	5
Net other comprehensive income (loss)	10	1	22	(4)
Less other comprehensive (income) loss attributable to noncontrolling interests		0		0
Ending balance	(15)	(43)	(15)	(43)
Defined Benefit Pension and Other Benefits Plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(19)	(79)	(19)	(79)
Other comprehensive income (loss), before reclassifications	0	0	0	0
Amounts reclassified from AOCI	0	0	0	0
Net other comprehensive income (loss)	0	0	0	0
Less other comprehensive (income) loss attributable to noncontrolling interests		0		0
Ending balance	(19)	(79)	(19)	(79)
Net Unrealized Gains (Losses) on Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(101)	(73)	(101)	(64)
Other comprehensive income (loss), before reclassifications	33	(7)	33	(21)
Amounts reclassified from AOCI	0	0	0	0
Net other comprehensive income (loss)	33	(7)	33	(21)
Less other comprehensive (income) loss attributable to noncontrolling interests		2		7
Ending balance	(68)	(78)	(68)	(78)
Other Comprehensive Income Related to Equity Method Investees
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	8	7	8	7
Other comprehensive income (loss), before reclassifications	0	0	0	0
Amounts reclassified from AOCI	0	0	0	0
Net other comprehensive income (loss)	0	0	0	0
Less other comprehensive (income) loss attributable to noncontrolling interests		0		0
Ending balance	8	7	8	7
Total
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(114)	(167)	(126)	(153)
Other comprehensive income (loss), before reclassifications	42	(10)	51	(30)
Amounts reclassified from AOCI	2	4	5	5
Net other comprehensive income (loss)	44	(6)	56	(25)
Less other comprehensive (income) loss attributable to noncontrolling interests		2		7
Ending balance	$ (70)	(171)	$ (70)	(171)
Net unrealized gains (losses) on cash flow hedges. noncontrolling interest
Accumulated Other Comprehensive Income (Loss) [Line Items]
Ending balance		0		0
Net unrealized gains (losses) on available for sale securities, noncontrolling interest
Accumulated Other Comprehensive Income (Loss) [Line Items]
Ending balance		0		0
Defined benefit pension and other benefits plans, noncontrolling interest
Accumulated Other Comprehensive Income (Loss) [Line Items]
Ending balance		0		0
Net unrealized gains (losses) on foreign currency translation, noncontrolling interest
Accumulated Other Comprehensive Income (Loss) [Line Items]
Ending balance		(17)		(17)
Other comprehensive income (loss) related to equity method investees, noncontrolling interest
Accumulated Other Comprehensive Income (Loss) [Line Items]
Ending balance		0		0
Total, noncontrolling interest
Accumulated Other Comprehensive Income (Loss) [Line Items]
Ending balance		$ (17)		$ (17)