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Future Policy Benefits (Undiscounted and Discounted) (Details) - Other Segments - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Life Insurance Product Line [Member] | Americas [Member] |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance | $ 178,510 | $ 170,430
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance | 84,652 | 78,930
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance | 189,168 | 180,256
Liability For Future Policy Benefit Expected Future Policy Benefit Discounted Before Reinsurance | 83,317 | 77,378
Life Insurance Product Line [Member] | Canada Segment Reporting Information [Member] |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance | 56,133 | 52,991
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance | 22,816 | 20,421
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance | 58,139 | 55,949
Liability For Future Policy Benefit Expected Future Policy Benefit Discounted Before Reinsurance | 22,966 | 20,382
Life Insurance Product Line [Member] | EMEA [Member] |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance | 25,934 | 24,517
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance | 14,822 | 13,368
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance | 25,796 | 24,050
Liability For Future Policy Benefit Expected Future Policy Benefit Discounted Before Reinsurance | 14,251 | 12,646
Life Insurance Product Line [Member] | Asia Pacific [Member] |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance | 94,535 | 91,399
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance | 39,119 | 37,600
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance | 90,475 | 87,632
Liability For Future Policy Benefit Expected Future Policy Benefit Discounted Before Reinsurance | 33,406 | 31,927
Insurance, Other [Member] | Americas [Member] |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance | 2,963 | 3,163
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance | 1,893 | 1,946
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance | 11,031 | 9,129
Liability For Future Policy Benefit Expected Future Policy Benefit Discounted Before Reinsurance | 6,474 | 5,206
Insurance, Other [Member] | Canada Segment Reporting Information [Member] |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance | 4,572 | 4,811
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance | 3,080 | 3,095
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance | 4,310 | 4,681
Liability For Future Policy Benefit Expected Future Policy Benefit Discounted Before Reinsurance | 2,917 | 3,015
Insurance, Other [Member] | EMEA [Member] |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance | 91,783 | 55,241
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance | 52,894 | 33,115
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance | 93,278 | 57,744
Liability For Future Policy Benefit Expected Future Policy Benefit Discounted Before Reinsurance | 53,719 | 34,611
Insurance, Other [Member] | Asia Pacific [Member] |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance | 4,016 | 3,018
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance | 3,026 | 2,462
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance | 11,077 | 8,636
Liability For Future Policy Benefit Expected Future Policy Benefit Discounted Before Reinsurance | $ 7,090 | $ 6,126

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