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Equity (Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |
Accumulated other comprehensive income (loss), beginning | $ (153) | $ (218) | $ 0
Other comprehensive income (loss), before reclassifications | 31 | 52 | (260)
Amounts reclassified from AOCI | 6 | 16 | 23
Total other comprehensive income (loss), net of tax | 37 | 68 | (237)
Less other comprehensive (income) loss attributable to noncontrolling interests | (10) | (3) | 19
Accumulated other comprehensive income (loss), ending | (126) | (153) | (218)
AOCI Including Portion Attributable to Noncontrolling Interest, Net Of Tax | 0 |  |
Net Unrealized Gains on Cash Flow Hedges |  |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |
Accumulated other comprehensive income (loss), beginning | 22 | 20 | 14
Other comprehensive income (loss), before reclassifications | 0 | 0 | 0
Amounts reclassified from AOCI | 1 | 2 | 6
Total other comprehensive income (loss), net of tax | 1 | 2 | 6
Less other comprehensive (income) loss attributable to noncontrolling interests | 0 | 0 | 0
Accumulated other comprehensive income (loss), ending | 23 | 22 | 20
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 | (39) | (69) | 5
Other comprehensive income (loss), before reclassifications | (3) | 17 | (84)
Amounts reclassified from AOCI | 5 | 13 | 10
Total other comprehensive income (loss), net of tax | 2 | 30 | (74)
Less other comprehensive (income) loss attributable to noncontrolling interests | 0 | 0 | 0
Accumulated other comprehensive income (loss), ending | (37) | (39) | (69)
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 | (79) | (101) | 25
Other comprehensive income (loss), before reclassifications | 60 | 21 | (133)
Amounts reclassified from AOCI | 0 | 1 | 7
Total other comprehensive income (loss), net of tax | 60 | 22 | (126)
Less other comprehensive (income) loss attributable to noncontrolling interests | 0 | 0 | 0
Accumulated other comprehensive income (loss), ending | (19) | (79) | (101)
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 | (64) | (74) | (49)
Other comprehensive income (loss), before reclassifications | (27) | 13 | (44)
Amounts reclassified from AOCI | 0 | 0 | 0
Total other comprehensive income (loss), net of tax | (27) | 13 | (44)
Less other comprehensive (income) loss attributable to noncontrolling interests | (10) | (3) | 19
Accumulated other comprehensive income (loss), ending | (101) | (64) | (74)
AOCI Including Portion Attributable to Noncontrolling Interest, Net Of Tax | 0 |  |
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 | 7 | 6 | 5
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
Accumulated other comprehensive income (loss), ending | 8 | $ 7 | $ 6
AOCI Including Portion Attributable to Noncontrolling Interest, Net Of Tax | $ 0 |  |

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