v3.26.1
Future Policy Benefits (Assumption Explanations) (Details) - Other Segments - USD ($)
Jun. 30, 2026
Jun. 30, 2025
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 $ 15,200,000,000 $ 14,800,000,000
Future Policy Benefits Actual To Expected Variance (25,000,000) (68,000,000)
Impact Of Updating Discount Rate Recognized In OCI (85,000,000) 72,000,000
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 3,600,000,000 3,600,000,000
Future Policy Benefits Actual To Expected Variance (4,000,000) (5,000,000)
Impact Of Updating Discount Rate Recognized In OCI (5,000,000) 98,000,000
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 2,000,000,000 1,700,000,000
Future Policy Benefits Actual To Expected Variance 11,000,000 4,000,000
Impact Of Updating Discount Rate Recognized In OCI 29,000,000 83,000,000
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 5,600,000,000 5,200,000,000
Future Policy Benefits Actual To Expected Variance 5,000,000 (24,000,000)
Impact Of Updating Discount Rate Recognized In OCI (38,000,000) 122,000,000
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 11,000,000,000 10,100,000,000
Future Policy Benefits Actual To Expected Variance (3,000,000) (3,000,000)
Impact Of Updating Discount Rate Recognized In OCI (130,000,000) (100,000,000)
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 4,500,000,000 4,600,000,000
Future Policy Benefits Actual To Expected Variance 0 0
Impact Of Updating Discount Rate Recognized In OCI (55,000,000) (122,000,000)
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 10,800,000,000 9,100,000,000
Future Policy Benefits Actual To Expected Variance 10,000,000 6,000,000
Impact Of Updating Discount Rate Recognized In OCI 139,000,000 51,000,000
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 21,300,000,000 15,800,000,000
Future Policy Benefits Actual To Expected Variance 39,000,000 5,000,000
Impact Of Updating Discount Rate Recognized In OCI (902,000,000) (995,000,000)
Changes In Cash Flow Assumptions $ 0 $ 0