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Segment Information (Reconciliation of Depreciation and Amortization from Segment to Consolidated) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Depreciation, Depletion and Amortization [Abstract]      
Depreciation, Depletion and Amortization, Nonproduction $ 387 $ 309 $ 361
Americas [Member]      
Depreciation, Depletion and Amortization [Abstract]      
Depreciation, Depletion and Amortization, Nonproduction 199 206 191
Canada Segment Reporting Information [Member]      
Depreciation, Depletion and Amortization [Abstract]      
Depreciation, Depletion and Amortization, Nonproduction 18 5 14
EMEA [Member]      
Depreciation, Depletion and Amortization [Abstract]      
Depreciation, Depletion and Amortization, Nonproduction 62 26 44
Asia Pacific [Member]      
Depreciation, Depletion and Amortization [Abstract]      
Depreciation, Depletion and Amortization, Nonproduction 90 54 90
Corporate And Other Segment Reporting Information [Member]      
Depreciation, Depletion and Amortization [Abstract]      
Depreciation, Depletion and Amortization, Nonproduction 18 18 22
Life Insurance Product Line [Member] | Americas [Member]      
Depreciation, Depletion and Amortization [Abstract]      
Depreciation, Depletion and Amortization, Nonproduction 150 147 126
Life Insurance Product Line [Member] | Canada Segment Reporting Information [Member]      
Depreciation, Depletion and Amortization [Abstract]      
Depreciation, Depletion and Amortization, Nonproduction 18 5 14
Life Insurance Product Line [Member] | EMEA [Member]      
Depreciation, Depletion and Amortization [Abstract]      
Depreciation, Depletion and Amortization, Nonproduction 61 25 43
Life Insurance Product Line [Member] | Asia Pacific [Member]      
Depreciation, Depletion and Amortization [Abstract]      
Depreciation, Depletion and Amortization, Nonproduction 61 42 81
Insurance, Other [Member] | Americas [Member]      
Depreciation, Depletion and Amortization [Abstract]      
Depreciation, Depletion and Amortization, Nonproduction 49 59 65
Insurance, Other [Member] | Canada Segment Reporting Information [Member]      
Depreciation, Depletion and Amortization [Abstract]      
Depreciation, Depletion and Amortization, Nonproduction 0 0 0
Insurance, Other [Member] | EMEA [Member]      
Depreciation, Depletion and Amortization [Abstract]      
Depreciation, Depletion and Amortization, Nonproduction 1 1 1
Insurance, Other [Member] | Asia Pacific [Member]      
Depreciation, Depletion and Amortization [Abstract]      
Depreciation, Depletion and Amortization, Nonproduction $ 29 $ 12 $ 9