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Accumulated Other Comprehensive Income (Loss) - Other Comprehensive Income (Loss) Reclassification Adjustments (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Pretax change before reclassifications | $ (1,168) | $ (160) | $ 108
Reclassifications out of AOCI | 143 | (14) | (6)
Tax effect | 249 | 42 | (21)
Total other comprehensive (loss) income, net of tax | (776) | (132) | 81
Unrealized Gains (Losses) on Debt Securities |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Pretax change before reclassifications | (1,182) | (169) | 125
Reclassifications out of AOCI | 137 | (20) | (8)
Tax effect | 264 | 46 | (29)
Total other comprehensive (loss) income, net of tax | (781) | (143) | 88
Foreign Currency Translation Adjustment |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Pretax change before reclassifications | (43) | (2) | 14
Reclassifications out of AOCI | 0 | 0 | 0
Tax effect | 1 | 1 | 0
Total other comprehensive (loss) income, net of tax | (42) | (1) | 14
Pension Benefit Adjustment |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Pretax change before reclassifications | 57 | 11 | (31)
Reclassifications out of AOCI | 6 | 6 | 2
Tax effect | (16) | (5) | 8
Total other comprehensive (loss) income, net of tax | $ 47 | $ 12 | $ (21)

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- Definition Amount before tax and reclassification adjustments of other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 50 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=124431353&loc=SL124442411-227067 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 20 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 17 -URI https://asc.fasb.org/extlink&oid=118261656&loc=d3e32136-110900 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 50 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=124431353&loc=SL124442407-227067 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI https://asc.fasb.org/extlink&oid=126968391&loc=SL7669686-108580 + Details
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