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Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
AOCI roll forward |  |  |
Beginning balance | $ 6,896 | $ 6,864 | $ 7,126
Other comprehensive income (loss), net of tax | (78) | 32 | (86)
Ending balance | 8,254 | 6,896 | 6,864
Unrealized gain (loss) on investment |  | (23) |
Unrealized gain (loss) on investment, tax |  | (8) |
Accumulated Other Comprehensive Income (Loss) [Member] |  |  |
AOCI roll forward |  |  |
Beginning balance | (37) | (69) | 17
Other comprehensive income (loss) before reclassifications, net of tax expense (benefit) | (75) | 35 | (88)
Amounts reclassified from accumulated other comprehensive (income) loss, net of tax (expense) benefit | (3) | (3) | 2
Other comprehensive income (loss), net of tax | (78) | 32 | (86)
Ending balance | (115) | (37) | (69)
Derivative Instruments [Member] |  |  |
AOCI roll forward |  |  |
Beginning balance | 17 | 3 |
Other comprehensive income (loss) before reclassifications, net of tax expense (benefit) | 30 | 16 |
Amounts reclassified from accumulated other comprehensive (income) loss, net of tax (expense) benefit | (3) | (2) | 3
Other comprehensive income (loss), net of tax | 27 | 14 | 3
Ending balance | 44 | 17 | 3
Other comprehensive income (loss) before reclassifications, tax | 10 | 5 | 0
Amounts reclassified from accumulated other comprehensive (income) loss, tax | 1 | (1) | 1
Available-for-Sale Securities [Member] |  |  |
AOCI roll forward |  |  |
Beginning balance | 8 | 19 | 43
Other comprehensive income (loss) before reclassifications, net of tax expense (benefit) | 7 | (11) | (24)
Other comprehensive income (loss), net of tax | 7 | (11) | (24)
Ending balance | 15 | 8 | 19
Other comprehensive income (loss) before reclassifications, tax | 3 | (4) | (8)
Amounts reclassified from accumulated other comprehensive (income) loss, tax | 0 | 0 | 0
Foreign Currency Translation Adjustments [Member] |  |  |
AOCI roll forward |  |  |
Beginning balance | (68) | (94) | (29)
Other comprehensive income (loss) before reclassifications, net of tax expense (benefit) | (111) | 26 | (65)
Other comprehensive income (loss), net of tax | (111) | 26 | (65)
Ending balance | (179) | (68) | (94)
Other comprehensive income (loss) before reclassifications, tax | 0 | 0 | 0
Amounts reclassified from accumulated other comprehensive (income) loss, tax | 0 | 0 | 0
Post - Retirement Benefit Obligations [Member] |  |  |
AOCI roll forward |  |  |
Beginning balance | 6 | 3 | 3
Other comprehensive income (loss) before reclassifications, net of tax expense (benefit) | (1) | 4 | 1
Amounts reclassified from accumulated other comprehensive (income) loss, net of tax (expense) benefit |  | (1) | (1)
Other comprehensive income (loss), net of tax | (1) | 3 |
Ending balance | 5 | 6 | 3
Other comprehensive income (loss) before reclassifications, tax | 0 | 2 | 0
Amounts reclassified from accumulated other comprehensive (income) loss, tax | $ 0 | $ 0 | $ 0

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