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Equity (Accumulated Other Comprehensive Income) (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]
Accumulated other comprehensive income (loss), beginning	$ 0	$ (92)	$ (169)
Other comprehensive income (loss), before reclassifications	(260)	84	63
Amounts reclassified from AOCI	23	7	11
Total other comprehensive income (loss), net of tax	(237)	91	74
Less other comprehensive (income) loss attributable to noncontrolling interests	19	1	(7)
AOCI Impact of Disposal of a Business			10
Accumulated other comprehensive income (loss), ending	(218)	0	(92)
AOCI Including Portion Attributable to Noncontrolling Interest, Net Of Tax	(14)
Net Unrealized Gains (Losses) on Cash Flow Hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Accumulated other comprehensive income (loss), beginning	14	8	(27)
Other comprehensive income (loss), before reclassifications	0	0	0
Amounts reclassified from AOCI	6	6	12
Total other comprehensive income (loss), net of tax	6	6	12
Less other comprehensive (income) loss attributable to noncontrolling interests	0	0	0
AOCI Impact of Disposal of a Business			23
Accumulated other comprehensive income (loss), ending	20	14	8
AOCI Including Portion Attributable to Noncontrolling Interest, Net Of Tax	0
Net Unrealized Gains (Losses) on Available for Sale Securities
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Accumulated other comprehensive income (loss), beginning	5	20	11
Other comprehensive income (loss), before reclassifications	(84)	(11)	12
Amounts reclassified from AOCI	10	(4)	(3)
Total other comprehensive income (loss), net of tax	(74)	(15)	9
Less other comprehensive (income) loss attributable to noncontrolling interests	0	0	0
AOCI Impact of Disposal of a Business			0
Accumulated other comprehensive income (loss), ending	(69)	5	20
AOCI Including Portion Attributable to Noncontrolling Interest, Net Of Tax	0
Defined Benefit Pension and Other Benefits Plans
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Accumulated other comprehensive income (loss), beginning	25	(75)	(114)
Other comprehensive income (loss), before reclassifications	(133)	95	37
Amounts reclassified from AOCI	7	5	2
Total other comprehensive income (loss), net of tax	(126)	100	39
Less other comprehensive (income) loss attributable to noncontrolling interests	0	0	0
AOCI Impact of Disposal of a Business			0
Accumulated other comprehensive income (loss), ending	(101)	25	(75)
AOCI Including Portion Attributable to Noncontrolling Interest, Net Of Tax	0
Net Unrealized Gains (Losses) on Foreign Currency Translation
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Accumulated other comprehensive income (loss), beginning	(49)	(49)	(42)
Other comprehensive income (loss), before reclassifications	(44)	(1)	13
Amounts reclassified from AOCI	0	0	0
Total other comprehensive income (loss), net of tax	(44)	(1)	13
Less other comprehensive (income) loss attributable to noncontrolling interests	19	1	(7)
AOCI Impact of Disposal of a Business			(13)
Accumulated other comprehensive income (loss), ending	(74)	(49)	(49)
AOCI Including Portion Attributable to Noncontrolling Interest, Net Of Tax	(14)
Other Comprehensive Income Related to Equity Method Investees
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Accumulated other comprehensive income (loss), beginning	5	4	3
Other comprehensive income (loss), before reclassifications	1	1	1
Amounts reclassified from AOCI	0	0	0
Total other comprehensive income (loss), net of tax	1	1	1
Less other comprehensive (income) loss attributable to noncontrolling interests	0	0	0
AOCI Impact of Disposal of a Business			0
Accumulated other comprehensive income (loss), ending	6	$ 5	$ 4
AOCI Including Portion Attributable to Noncontrolling Interest, Net Of Tax	$ 0

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