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Future Policy Benefits (Assumption Explanations) (Details) - Other Segments - USD ($) | 6 Months Ended
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Jun. 30, 2024 | Jun. 30, 2023
Life Insurance Product Line [Member] | Americas [Member] |  |
Liability for Future Policy Benefit, by Product Segment [Line Items] |  |
Net Liability For Future Policy Benefits At Original Discount Rate | $ 11,900,000,000 | $ 11,100,000,000
Future Policy Benefits Actual To Expected Variance | (103,000,000) | (34,000,000)
Impact Of Updating Discount Rate Recognized In OCI | $ (863,000,000) | $ 307,000,000
Future Policy Benefits Actual To Expected Variance Increase Decrease | 0.9% decrease | 0.3% increase
Impact Of Updating Discount Rate Recognized In OCI Increase Decrease | 7.1% decrease | 2.8% increase
Changes In Cash Flow Assumptions | $ 0 | $ 0
Life Insurance Product Line [Member] | CANADA |  |
Liability for Future Policy Benefit, by Product Segment [Line Items] |  |
Net Liability For Future Policy Benefits At Original Discount Rate | 3,500,000,000 | 3,500,000,000
Future Policy Benefits Actual To Expected Variance | (6,000,000) | 0
Impact Of Updating Discount Rate Recognized In OCI | $ (243,000,000) | $ 184,000,000
Future Policy Benefits Actual To Expected Variance Increase Decrease | 0.2% decrease | None
Impact Of Updating Discount Rate Recognized In OCI Increase Decrease | 6.8% decrease | 5.5% increase
Changes In Cash Flow Assumptions | $ 0 | $ 0
Life Insurance Product Line [Member] | EMEA [Member] |  |
Liability for Future Policy Benefit, by Product Segment [Line Items] |  |
Net Liability For Future Policy Benefits At Original Discount Rate | 1,400,000,000 | 1,300,000,000
Future Policy Benefits Actual To Expected Variance | 5,000,000 | 7,000,000
Impact Of Updating Discount Rate Recognized In OCI | $ 66,000,000 | $ 73,000,000
Future Policy Benefits Actual To Expected Variance Increase Decrease | 0.4% increase | 0.6% increase
Impact Of Updating Discount Rate Recognized In OCI Increase Decrease | 4.6% decrease | 6.0% decrease
Changes In Cash Flow Assumptions | $ 0 | $ 0
Life Insurance Product Line [Member] | Asia Pacific [Member] |  |
Liability for Future Policy Benefit, by Product Segment [Line Items] |  |
Net Liability For Future Policy Benefits At Original Discount Rate | 4,700,000,000 | 4,400,000,000
Future Policy Benefits Actual To Expected Variance | 29,000,000 | (23,000,000)
Impact Of Updating Discount Rate Recognized In OCI | $ (167,000,000) | $ 30,000,000
Future Policy Benefits Actual To Expected Variance Increase Decrease | 0.6% decrease | 0.5% decrease
Impact Of Updating Discount Rate Recognized In OCI Increase Decrease | 3.6% decrease | 0.7% increase
Changes In Cash Flow Assumptions | $ 0 | $ 0
Insurance, Other | Americas [Member] |  |
Liability for Future Policy Benefit, by Product Segment [Line Items] |  |
Net Liability For Future Policy Benefits At Original Discount Rate | 7,600,000,000 | 4,200,000,000
Future Policy Benefits Actual To Expected Variance | (3,000,000) | (5,000,000)
Impact Of Updating Discount Rate Recognized In OCI | $ (194,000,000) | $ (37,000,000)
Future Policy Benefits Actual To Expected Variance Increase Decrease | 0.1% decrease | 0.1% decrease
Impact Of Updating Discount Rate Recognized In OCI Increase Decrease | 3.6% decrease | 0.9% increase
Changes In Cash Flow Assumptions | $ 0 | $ 0
Insurance, Other | CANADA |  |
Liability for Future Policy Benefit, by Product Segment [Line Items] |  |
Net Liability For Future Policy Benefits At Original Discount Rate | 4,100,000,000 | 51,000,000,000
Future Policy Benefits Actual To Expected Variance | 0 | (7,000,000)
Impact Of Updating Discount Rate Recognized In OCI | $ (77,000,000) | $ (1,000,000)
Future Policy Benefits Actual To Expected Variance Increase Decrease | None | 13.2% decrease
Impact Of Updating Discount Rate Recognized In OCI Increase Decrease | 296.2% increase (1) | 2% increase
Changes In Cash Flow Assumptions | $ 0 | $ 0
Insurance, Other | EMEA [Member] |  |
Liability for Future Policy Benefit, by Product Segment [Line Items] |  |
Net Liability For Future Policy Benefits At Original Discount Rate | 6,700,000,000 | 6,300,000,000
Future Policy Benefits Actual To Expected Variance | 4,000,000 | 14,000,000,000
Impact Of Updating Discount Rate Recognized In OCI | $ 289,000,000 | $ 259,000,000
Future Policy Benefits Actual To Expected Variance Increase Decrease | 0.1% increase | 0.3% decrease
Impact Of Updating Discount Rate Recognized In OCI Increase Decrease | 4.7% decrease | 4.63% decrease
Changes In Cash Flow Assumptions | $ 0 | $ 0
Insurance, Other | Asia Pacific [Member] |  |
Liability for Future Policy Benefit, by Product Segment [Line Items] |  |
Net Liability For Future Policy Benefits At Original Discount Rate | 10,700,000,000 | 5,900,000,000
Future Policy Benefits Actual To Expected Variance | 1,000,000 | 1,000,000
Impact Of Updating Discount Rate Recognized In OCI | $ (107,000,000) | $ (169,000,000)
Future Policy Benefits Actual To Expected Variance Increase Decrease | None | None
Impact Of Updating Discount Rate Recognized In OCI Increase Decrease | 1.8% decrease | 2.7% increase
Changes In Cash Flow Assumptions | $ 0 | $ 0

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