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Insurance (Liabilities for Guarantees) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Universal and Variable Life Contracts | Secondary Guarantees | Foreign Currency Translation |  |  |
Movement In Guaranteed Benefit Liability Gross Rollforward |  |  |
Incurred guaranteed benefits | $ (268) | $ (260) | $ 125
Direct and Assumed |  |  |
Movement In Guaranteed Benefit Liability Gross Rollforward |  |  |
Balance at January 1, | 6,450 | 6,441 | 5,548
Incurred guaranteed benefits | (179) | 226 | 1,063
Paid guaranteed benefits | (217) | (185) | (170)
Liabilities for Guarantees on Long-Duration Contracts, Other Liability Adjustments |  | (32) |
Balance at December 31, | 6,054 | 6,450 | 6,441
Direct and Assumed | Secondary Guarantees |  |  |
Movement In Guaranteed Benefit Liability Gross Rollforward |  |  |
Balance at January 1, | 4,126 | 4,265 | 3,762
Incurred guaranteed benefits | (261) | (37) | 602
Paid guaranteed benefits | (120) | (102) | (99)
Balance at December 31, | 3,745 | 4,126 | 4,265
Direct and Assumed | Secondary Guarantees | MetLife Poland and Greece |  |  |
Movement In Guaranteed Benefit Liability Gross Rollforward |  |  |
Liabilities for Guarantees on Long-Duration Contracts, Other Liability Adjustments |  | 0 |
Direct and Assumed | Paid-Up Guarantees |  |  |
Movement In Guaranteed Benefit Liability Gross Rollforward |  |  |
Balance at January 1, | 404 | 408 | 427
Incurred guaranteed benefits | 104 | 43 | 26
Paid guaranteed benefits | (44) | (47) | (45)
Balance at December 31, | 464 | 404 | 408
Direct and Assumed | Paid-Up Guarantees | MetLife Poland and Greece |  |  |
Movement In Guaranteed Benefit Liability Gross Rollforward |  |  |
Liabilities for Guarantees on Long-Duration Contracts, Other Liability Adjustments |  | 0 |
Direct and Assumed | Guaranteed Minimum Death and Withdrawal Benefit [Member] |  |  |
Movement In Guaranteed Benefit Liability Gross Rollforward |  |  |
Balance at January 1, | 743 | 639 | 465
Incurred guaranteed benefits | 247 | 133 | 195
Paid guaranteed benefits | (39) | (29) | (21)
Balance at December 31, | 951 | 743 | 639
Direct and Assumed | Guaranteed Minimum Death and Withdrawal Benefit [Member] | MetLife Poland and Greece |  |  |
Movement In Guaranteed Benefit Liability Gross Rollforward |  |  |
Liabilities for Guarantees on Long-Duration Contracts, Other Liability Adjustments |  | 0 |
Direct and Assumed | Guaranteed Minimum Income Benefit |  |  |
Movement In Guaranteed Benefit Liability Gross Rollforward |  |  |
Balance at January 1, | 1,177 | 1,129 | 894
Incurred guaranteed benefits | (269) | 87 | 240
Paid guaranteed benefits | (14) | (7) | (5)
Balance at December 31, | 894 | 1,177 | 1,129
Direct and Assumed | Guaranteed Minimum Income Benefit | MetLife Poland and Greece |  |  |
Movement In Guaranteed Benefit Liability Gross Rollforward |  |  |
Liabilities for Guarantees on Long-Duration Contracts, Other Liability Adjustments |  | (32) |
Ceded |  |  |
Movement In Guaranteed Benefit Liability Gross Rollforward |  |  |
Balance at January 1, | 748 | 724 | 640
Incurred guaranteed benefits | 53 | 83 | 125
Paid guaranteed benefits | (48) | (59) | (41)
Liabilities for Guarantees on Long-Duration Contracts, Other Liability Adjustments |  | 0 |
Balance at December 31, | 753 | 748 | 724
Ceded | Secondary Guarantees |  |  |
Movement In Guaranteed Benefit Liability Gross Rollforward |  |  |
Balance at January 1, | 451 | 427 | 349
Incurred guaranteed benefits | 29 | 57 | 96
Paid guaranteed benefits | (24) | (33) | (18)
Balance at December 31, | 456 | 451 | 427
Ceded | Secondary Guarantees | MetLife Poland and Greece |  |  |
Movement In Guaranteed Benefit Liability Gross Rollforward |  |  |
Liabilities for Guarantees on Long-Duration Contracts, Other Liability Adjustments |  | 0 |
Ceded | Paid-Up Guarantees |  |  |
Movement In Guaranteed Benefit Liability Gross Rollforward |  |  |
Balance at January 1, | 288 | 292 | 281
Incurred guaranteed benefits | 33 | 30 | 43
Paid guaranteed benefits | (32) | (34) | (32)
Balance at December 31, | 289 | 288 | 292
Ceded | Paid-Up Guarantees | MetLife Poland and Greece |  |  |
Movement In Guaranteed Benefit Liability Gross Rollforward |  |  |
Liabilities for Guarantees on Long-Duration Contracts, Other Liability Adjustments |  | 0 |
Ceded | Guaranteed Minimum Death and Withdrawal Benefit [Member] |  |  |
Movement In Guaranteed Benefit Liability Gross Rollforward |  |  |
Balance at January 1, | 0 | (2) | 0
Incurred guaranteed benefits | (8) | (6) | (11)
Paid guaranteed benefits | 8 | 8 | 9
Balance at December 31, | 0 | 0 | (2)
Ceded | Guaranteed Minimum Death and Withdrawal Benefit [Member] | MetLife Poland and Greece |  |  |
Movement In Guaranteed Benefit Liability Gross Rollforward |  |  |
Liabilities for Guarantees on Long-Duration Contracts, Other Liability Adjustments |  | 0 |
Ceded | Guaranteed Minimum Income Benefit |  |  |
Movement In Guaranteed Benefit Liability Gross Rollforward |  |  |
Balance at January 1, | 9 | 7 | 10
Incurred guaranteed benefits | (1) | 2 | (3)
Paid guaranteed benefits | 0 | 0 | 0
Balance at December 31, | 8 | 9 | 7
Ceded | Guaranteed Minimum Income Benefit | MetLife Poland and Greece |  |  |
Movement In Guaranteed Benefit Liability Gross Rollforward |  |  |
Liabilities for Guarantees on Long-Duration Contracts, Other Liability Adjustments |  | 0 |
Net |  |  |
Movement In Guaranteed Benefit Liability Gross Rollforward |  |  |
Balance at January 1, | 5,702 | 5,717 | 4,908
Incurred guaranteed benefits | (232) | 143 | 938
Paid guaranteed benefits | (169) | (126) | (129)
Liabilities for Guarantees on Long-Duration Contracts, Other Liability Adjustments |  | (32) |
Balance at December 31, | 5,301 | 5,702 | 5,717
Net | Secondary Guarantees |  |  |
Movement In Guaranteed Benefit Liability Gross Rollforward |  |  |
Balance at January 1, | 3,675 | 3,838 | 3,413
Incurred guaranteed benefits | (290) | (94) | 506
Paid guaranteed benefits | (96) | (69) | (81)
Balance at December 31, | 3,289 | 3,675 | 3,838
Net | Secondary Guarantees | MetLife Poland and Greece |  |  |
Movement In Guaranteed Benefit Liability Gross Rollforward |  |  |
Liabilities for Guarantees on Long-Duration Contracts, Other Liability Adjustments |  | 0 |
Net | Paid-Up Guarantees |  |  |
Movement In Guaranteed Benefit Liability Gross Rollforward |  |  |
Balance at January 1, | 116 | 116 | 146
Incurred guaranteed benefits | 71 | 13 | (17)
Paid guaranteed benefits | (12) | (13) | (13)
Balance at December 31, | 175 | 116 | 116
Net | Paid-Up Guarantees | MetLife Poland and Greece |  |  |
Movement In Guaranteed Benefit Liability Gross Rollforward |  |  |
Liabilities for Guarantees on Long-Duration Contracts, Other Liability Adjustments |  | 0 |
Net | Guaranteed Minimum Death and Withdrawal Benefit [Member] |  |  |
Movement In Guaranteed Benefit Liability Gross Rollforward |  |  |
Balance at January 1, | 743 | 641 | 465
Incurred guaranteed benefits | 255 | 139 | 206
Paid guaranteed benefits | (47) | (37) | (30)
Balance at December 31, | 951 | 743 | 641
Net | Guaranteed Minimum Death and Withdrawal Benefit [Member] | MetLife Poland and Greece |  |  |
Movement In Guaranteed Benefit Liability Gross Rollforward |  |  |
Liabilities for Guarantees on Long-Duration Contracts, Other Liability Adjustments |  | 0 |
Net | Guaranteed Minimum Income Benefit |  |  |
Movement In Guaranteed Benefit Liability Gross Rollforward |  |  |
Balance at January 1, | 1,168 | 1,122 | 884
Incurred guaranteed benefits | (268) | 85 | 243
Paid guaranteed benefits | (14) | (7) | (5)
Balance at December 31, | $ 886 | 1,168 | $ 1,122
Net | Guaranteed Minimum Income Benefit | MetLife Poland and Greece |  |  |
Movement In Guaranteed Benefit Liability Gross Rollforward |  |  |
Liabilities for Guarantees on Long-Duration Contracts, Other Liability Adjustments |  | $ (32) |

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