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Accounting Changes and Error Corrections (DAC) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2023 | Mar. 31, 2022 | Dec. 31, 2022 | Dec. 31, 2021 | Jan. 01, 2021 | Dec. 31, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Deferred policy acquisition costs | $ 4,257 | $ 3,906 | $ 4,128 |  |  |
Life Insurance Product Line [Member] | Americas [Member] | Other Segments |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Deferred policy acquisition costs | 2,109 | 1,981 | 2,087 | $ 1,947 |  |
Deferred Policy Acquisition Cost, Capitalization | 57 | 70 |  |  |  |
Deferred Policy Acquisition Costs, Amortization Expense | (35) | (36) |  |  |  |
Deferred Policy Acquisition Costs, Foreign Currency Translation Gain (Loss) | 0 | 0 |  |  |  |
Life Insurance Product Line [Member] | CANADA | Other Segments |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Deferred policy acquisition costs | 171 | 192 | 171 | 191 |  |
Deferred Policy Acquisition Cost, Capitalization | 3 | 2 |  |  |  |
Deferred Policy Acquisition Costs, Amortization Expense | (3) | (3) |  |  |  |
Deferred Policy Acquisition Costs, Foreign Currency Translation Gain (Loss) | 0 | 2 |  |  |  |
Life Insurance Product Line [Member] | EMEA [Member] | Other Segments |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Deferred policy acquisition costs | 309 | 278 | 294 | 270 |  |
Deferred Policy Acquisition Cost, Capitalization | 25 | 15 |  |  |  |
Deferred Policy Acquisition Costs, Amortization Expense | (10) | (11) |  |  |  |
Deferred Policy Acquisition Costs, Foreign Currency Translation Gain (Loss) | 0 | 4 |  |  |  |
Life Insurance Product Line [Member] | Asia Pacific [Member] | Other Segments |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Deferred policy acquisition costs | 1,044 | 1,061 | 1,043 | 1,056 |  |
Deferred Policy Acquisition Cost, Capitalization | 19 | 34 |  |  |  |
Deferred Policy Acquisition Costs, Amortization Expense | (15) | (23) |  |  |  |
Deferred Policy Acquisition Costs, Foreign Currency Translation Gain (Loss) | (3) | (6) |  |  |  |
Insurance, Other | Americas [Member] | Other Segments |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Deferred policy acquisition costs | 330 | 298 | 341 | 312 |  |
Deferred Policy Acquisition Cost, Capitalization | 0 | 6 |  |  |  |
Deferred Policy Acquisition Costs, Amortization Expense | (11) | (20) |  |  |  |
Deferred Policy Acquisition Costs, Foreign Currency Translation Gain (Loss) | 0 | 0 |  |  |  |
Insurance, Other | CANADA | Other Segments |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Deferred policy acquisition costs | 0 | 0 | 0 | 0 |  |
Deferred Policy Acquisition Cost, Capitalization | 0 | 0 |  |  |  |
Deferred Policy Acquisition Costs, Amortization Expense | 0 | 0 |  |  |  |
Deferred Policy Acquisition Costs, Foreign Currency Translation Gain (Loss) | 0 | 0 |  |  |  |
Insurance, Other | EMEA [Member] | Other Segments |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Deferred policy acquisition costs | 0 | 0 | 0 | 0 |  |
Deferred Policy Acquisition Cost, Capitalization | 0 | 0 |  |  |  |
Deferred Policy Acquisition Costs, Amortization Expense | 0 | 0 |  |  |  |
Deferred Policy Acquisition Costs, Foreign Currency Translation Gain (Loss) | 0 | 0 |  |  |  |
Insurance, Other | Asia Pacific [Member] | Other Segments |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Deferred policy acquisition costs | 289 | 91 | 188 | 81 |  |
Deferred Policy Acquisition Cost, Capitalization | 108 | 13 |  |  |  |
Deferred Policy Acquisition Costs, Amortization Expense | (6) | (3) |  |  |  |
Deferred Policy Acquisition Costs, Foreign Currency Translation Gain (Loss) | $ (1) | $ 0 |  |  |  |
Accounting Standards Update 2018-12 |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Deferred policy acquisition costs |  |  | 4,128 | 3,860 |  |
Accounting Standards Update 2018-12 | Life Insurance Product Line [Member] | Americas [Member] | Other Segments |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Deferred policy acquisition costs |  |  | 2,087 | 1,947 |  |
Deferred Policy Acquisition Cost, Capitalization |  |  | 284 | 254 |  |
Deferred Policy Acquisition Costs, Amortization Expense |  |  | (144) | (123) |  |
Deferred Policy Acquisition Costs, Foreign Currency Translation Gain (Loss) |  |  | 0 | 0 |  |
Accounting Standards Update 2018-12 | Life Insurance Product Line [Member] | CANADA | Other Segments |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Deferred policy acquisition costs |  |  | 171 | 191 |  |
Deferred Policy Acquisition Cost, Capitalization |  |  | 10 | 8 |  |
Deferred Policy Acquisition Costs, Amortization Expense |  |  | (17) | (13) |  |
Deferred Policy Acquisition Costs, Foreign Currency Translation Gain (Loss) |  |  | (13) | 1 |  |
Accounting Standards Update 2018-12 | Life Insurance Product Line [Member] | EMEA [Member] | Other Segments |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Deferred policy acquisition costs |  |  | 294 | 270 |  |
Deferred Policy Acquisition Cost, Capitalization |  |  | 83 | 42 |  |
Deferred Policy Acquisition Costs, Amortization Expense |  |  | (38) | (24) |  |
Deferred Policy Acquisition Costs, Foreign Currency Translation Gain (Loss) |  |  | (21) | (12) |  |
Accounting Standards Update 2018-12 | Life Insurance Product Line [Member] | Asia Pacific [Member] | Other Segments |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Deferred policy acquisition costs |  |  | 1,043 | 1,056 |  |
Deferred Policy Acquisition Cost, Capitalization |  |  | 86 | 83 |  |
Deferred Policy Acquisition Costs, Amortization Expense |  |  | (67) | (55) |  |
Deferred Policy Acquisition Costs, Foreign Currency Translation Gain (Loss) |  |  | (32) | (18) |  |
Accounting Standards Update 2018-12 | Insurance, Other | Americas [Member] | Other Segments |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Deferred policy acquisition costs |  |  | 341 | 312 | $ 368 |
Deferred Policy Acquisition Cost, Capitalization |  |  | 87 | 8 |  |
Deferred Policy Acquisition Costs, Amortization Expense |  |  | (58) | (64) |  |
Deferred Policy Acquisition Costs, Foreign Currency Translation Gain (Loss) |  |  | 0 | 0 |  |
Accounting Standards Update 2018-12 | Insurance, Other | CANADA | Other Segments |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Deferred policy acquisition costs |  |  | 0 | 0 | 0 |
Deferred Policy Acquisition Cost, Capitalization |  |  | 0 | 0 |  |
Deferred Policy Acquisition Costs, Amortization Expense |  |  | 0 | 0 |  |
Deferred Policy Acquisition Costs, Foreign Currency Translation Gain (Loss) |  |  | 0 | 0 |  |
Accounting Standards Update 2018-12 | Insurance, Other | EMEA [Member] | Other Segments |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Deferred policy acquisition costs |  |  | 0 | 0 | 0 |
Deferred Policy Acquisition Cost, Capitalization |  |  | 0 | 0 |  |
Deferred Policy Acquisition Costs, Amortization Expense |  |  | 0 | 0 |  |
Deferred Policy Acquisition Costs, Foreign Currency Translation Gain (Loss) |  |  | 0 | 0 |  |
Accounting Standards Update 2018-12 | Insurance, Other | Asia Pacific [Member] | Other Segments |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Deferred policy acquisition costs |  |  | 188 | 81 | $ 41 |
Deferred Policy Acquisition Cost, Capitalization |  |  | 121 | 49 |  |
Deferred Policy Acquisition Costs, Amortization Expense |  |  | (13) | (8) |  |
Deferred Policy Acquisition Costs, Foreign Currency Translation Gain (Loss) |  |  | $ (1) | $ (1) |  |
Accounting Standards Update 2018-12 | Cumulative Effect, Period of Adoption, Adjustment | Life Insurance Product Line [Member] | Americas [Member] | Other Segments |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Deferred policy acquisition costs |  |  |  |  |  | $ 0
Accounting Standards Update 2018-12 | Cumulative Effect, Period of Adoption, Adjustment | Life Insurance Product Line [Member] | CANADA | Other Segments |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Deferred policy acquisition costs |  |  |  |  |  | 0
Accounting Standards Update 2018-12 | Cumulative Effect, Period of Adoption, Adjustment | Life Insurance Product Line [Member] | EMEA [Member] | Other Segments |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Deferred policy acquisition costs |  |  |  |  |  | 0
Accounting Standards Update 2018-12 | Cumulative Effect, Period of Adoption, Adjustment | Life Insurance Product Line [Member] | Asia Pacific [Member] | Other Segments |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Deferred policy acquisition costs |  |  |  |  |  | 0
Accounting Standards Update 2018-12 | Cumulative Effect, Period of Adoption, Adjustment | Insurance, Other | Americas [Member] | Other Segments |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Deferred policy acquisition costs |  |  |  |  |  | 114
Accounting Standards Update 2018-12 | Cumulative Effect, Period of Adoption, Adjustment | Insurance, Other | CANADA | Other Segments |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Deferred policy acquisition costs |  |  |  |  |  | 0
Accounting Standards Update 2018-12 | Cumulative Effect, Period of Adoption, Adjustment | Insurance, Other | EMEA [Member] | Other Segments |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Deferred policy acquisition costs |  |  |  |  |  | 0
Accounting Standards Update 2018-12 | Cumulative Effect, Period of Adoption, Adjustment | Insurance, Other | Asia Pacific [Member] | Other Segments |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Deferred policy acquisition costs |  |  |  |  |  | 0
Accounting Standards Update 2018-12 | Cumulative Effect, Period of Adoption, Adjusted Balance | Life Insurance Product Line [Member] | Americas [Member] | Other Segments |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Deferred policy acquisition costs |  |  |  |  |  | 1,816
Accounting Standards Update 2018-12 | Cumulative Effect, Period of Adoption, Adjusted Balance | Life Insurance Product Line [Member] | CANADA | Other Segments |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Deferred policy acquisition costs |  |  |  |  |  | 195
Accounting Standards Update 2018-12 | Cumulative Effect, Period of Adoption, Adjusted Balance | Life Insurance Product Line [Member] | EMEA [Member] | Other Segments |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Deferred policy acquisition costs |  |  |  |  |  | 264
Accounting Standards Update 2018-12 | Cumulative Effect, Period of Adoption, Adjusted Balance | Life Insurance Product Line [Member] | Asia Pacific [Member] | Other Segments |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Deferred policy acquisition costs |  |  |  |  |  | 1,046
Accounting Standards Update 2018-12 | Cumulative Effect, Period of Adoption, Adjusted Balance | Insurance, Other | Americas [Member] | Other Segments |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Deferred policy acquisition costs |  |  |  |  |  | 368
Accounting Standards Update 2018-12 | Cumulative Effect, Period of Adoption, Adjusted Balance | Insurance, Other | CANADA | Other Segments |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Deferred policy acquisition costs |  |  |  |  |  | 0
Accounting Standards Update 2018-12 | Cumulative Effect, Period of Adoption, Adjusted Balance | Insurance, Other | EMEA [Member] | Other Segments |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Deferred policy acquisition costs |  |  |  |  |  | 0
Accounting Standards Update 2018-12 | Cumulative Effect, Period of Adoption, Adjusted Balance | Insurance, Other | Asia Pacific [Member] | Other Segments |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Deferred policy acquisition costs |  |  |  |  |  | 41
Accounting Standards Update 2018-12 | Cumulative Effect, Period of Adoption, Original Balance | Life Insurance Product Line [Member] | Americas [Member] | Other Segments |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Deferred policy acquisition costs |  |  |  |  |  | 1,816
Accounting Standards Update 2018-12 | Cumulative Effect, Period of Adoption, Original Balance | Life Insurance Product Line [Member] | CANADA | Other Segments |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Deferred policy acquisition costs |  |  |  |  |  | 195
Accounting Standards Update 2018-12 | Cumulative Effect, Period of Adoption, Original Balance | Life Insurance Product Line [Member] | EMEA [Member] | Other Segments |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Deferred policy acquisition costs |  |  |  |  |  | 264
Accounting Standards Update 2018-12 | Cumulative Effect, Period of Adoption, Original Balance | Life Insurance Product Line [Member] | Asia Pacific [Member] | Other Segments |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Deferred policy acquisition costs |  |  |  |  |  | 1,046
Accounting Standards Update 2018-12 | Cumulative Effect, Period of Adoption, Original Balance | Insurance, Other | Americas [Member] | Other Segments |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Deferred policy acquisition costs |  |  |  |  |  | 254
Accounting Standards Update 2018-12 | Cumulative Effect, Period of Adoption, Original Balance | Insurance, Other | CANADA | Other Segments |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Deferred policy acquisition costs |  |  |  |  |  | 0
Accounting Standards Update 2018-12 | Cumulative Effect, Period of Adoption, Original Balance | Insurance, Other | EMEA [Member] | Other Segments |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Deferred policy acquisition costs |  |  |  |  |  | 0
Accounting Standards Update 2018-12 | Cumulative Effect, Period of Adoption, Original Balance | Insurance, Other | Asia Pacific [Member] | Other Segments |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Deferred policy acquisition costs |  |  |  |  |  | $ 41

X
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