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Variable Annuity and Insurance Guarantees - Liability Rollforward (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
GMDB and GGU    
Changes in additional liabilities for variable annuity and insurance guarantees    
Beginning Balance $ 24 $ 16
Incurred claims 12 10
Paid claims (3) (6)
Ending Balance 33 20
GMIB    
Changes in additional liabilities for variable annuity and insurance guarantees    
Beginning Balance 6 7
Incurred claims 1 1
Paid claims (1) (1)
Ending Balance 6 7
GMWB    
Changes in additional liabilities (contra liabilities) for variable annuity and insurance guarantees    
Beginning balance [1] 3,049 1,462
Incurred claims [1] (793) 2,219
Ending balance [1] 2,256 3,681
GMAB    
Changes in additional liabilities (contra liabilities) for variable annuity and insurance guarantees    
Beginning balance [1] 1 (39)
Incurred claims [1] (15) 63
Ending balance [1] (14) 24
UL    
Changes in additional liabilities for variable annuity and insurance guarantees    
Beginning Balance 916 758
Incurred claims 106 172
Paid claims (27) (34)
Ending Balance $ 995 $ 896
[1] The incurred claims for GMWB and GMAB include the change in the fair value of the liabilities (contra liabilities) less paid claims.