Fair Value of Financial Instruments - Assets and Liabilities Carrying at Fair Value Measured on a Recurring Basis (Details) - USD ($) $ in Millions | Mar. 31, 2020 | Dec. 31, 2019 |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | $ 21,140 | $ 23,726 |
Derivative investments, at fair value | 188 | 587 |
Total financial assets at fair value | 2,592 | 2,811 |
Funds withheld for reinsurance receivables, at fair value | 2,050 | 2,172 |
Level 1 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash and cash equivalents | 776 | 969 |
Equity securities | 365 | 387 |
Derivative investments, at fair value | 0 | 0 |
Derivative Liability | 2 | |
Other invested assets | | 0 |
Total financial assets at fair value | 1,734 | 1,997 |
Total financial liabilities at fair value | 2 | 0 |
FHLB common stock | 0 | 0 |
Commercial mortgage loans | 0 | 0 |
Residential mortgage loans | 0 | 0 |
Policy loans, included in other invested assets | 0 | 0 |
Affiliated other invested assets | 0 | 0 |
Bank Owned Life Insurance | | 0 |
Funds withheld for reinsurance receivables, at fair value | | 0 |
Total assets carried on balance sheet at amounts other than fair value | 0 | 0 |
Investment contracts, included in contractholder funds | 0 | 0 |
Debt | 0 | 0 |
Total liabilities carried on balance sheet at amounts other than fair value | 0 | 0 |
Level 2 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash and cash equivalents | 0 | 0 |
Equity securities | 549 | 614 |
Derivative investments, at fair value | 188 | 587 |
Derivative Liability | 0 | |
Other invested assets | | 0 |
Total financial assets at fair value | 20,783 | 23,693 |
Total financial liabilities at fair value | (18) | 33 |
FHLB common stock | 65 | 62 |
Commercial mortgage loans | 0 | 0 |
Residential mortgage loans | 0 | 0 |
Policy loans, included in other invested assets | 0 | 0 |
Affiliated other invested assets | 0 | 0 |
Bank Owned Life Insurance | | 0 |
Funds withheld for reinsurance receivables, at fair value | | 0 |
Total assets carried on balance sheet at amounts other than fair value | 65 | 62 |
Investment contracts, included in contractholder funds | 0 | 0 |
Debt | 537 | 578 |
Total liabilities carried on balance sheet at amounts other than fair value | 537 | 578 |
Level 3 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash and cash equivalents | 0 | 0 |
Equity securities | 1 | 1 |
Derivative investments, at fair value | 0 | 0 |
Derivative Liability | 0 | |
Other invested assets | | 46 |
Total financial assets at fair value | 2,592 | 2,811 |
Total financial liabilities at fair value | 5,244 | 5,204 |
FHLB common stock | 0 | 0 |
Commercial mortgage loans | 507 | 435 |
Residential mortgage loans | 1,297 | 848 |
Policy loans, included in other invested assets | 19 | 14 |
Affiliated other invested assets | 26 | 28 |
Bank Owned Life Insurance | 264 | 129 |
Funds withheld for reinsurance receivables, at fair value | | 1 |
Total assets carried on balance sheet at amounts other than fair value | 2,113 | 1,455 |
Investment contracts, included in contractholder funds | 19,915 | 19,285 |
Debt | 0 | 0 |
Total liabilities carried on balance sheet at amounts other than fair value | 19,915 | 19,285 |
Fair Value | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash and cash equivalents | 776 | 969 |
Equity securities | 915 | 1,002 |
Derivative investments, at fair value | 188 | 587 |
Derivative Liability | 2 | |
Other invested assets | | 46 |
Total financial assets at fair value | 25,109 | 28,501 |
Total financial liabilities at fair value | 5,228 | 5,237 |
FHLB common stock | 65 | 62 |
Commercial mortgage loans | 507 | 435 |
Residential mortgage loans | 1,297 | 848 |
Policy loans, included in other invested assets | 19 | 14 |
Affiliated other invested assets | 26 | 28 |
Bank Owned Life Insurance | 264 | 129 |
Funds withheld for reinsurance receivables, at fair value | | 1 |
Total assets carried on balance sheet at amounts other than fair value | 2,178 | 1,517 |
Investment contracts, included in contractholder funds | 19,915 | 19,285 |
Debt | 537 | 578 |
Total liabilities carried on balance sheet at amounts other than fair value | 20,452 | 19,863 |
Carrying Value | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash and cash equivalents | 776 | 969 |
Equity securities | 915 | 1,002 |
Derivative investments, at fair value | 188 | 587 |
Derivative Liability | 2 | |
Other invested assets | | 46 |
Total financial assets at fair value | 25,109 | 28,501 |
Total financial liabilities at fair value | 5,228 | 5,237 |
FHLB common stock | 65 | 62 |
Commercial mortgage loans | 487 | 422 |
Residential mortgage loans | 1,282 | 845 |
Policy loans, included in other invested assets | 29 | 28 |
Affiliated other invested assets | 28 | 28 |
Bank Owned Life Insurance | 264 | 129 |
Funds withheld for reinsurance receivables, at fair value | | 1 |
Total assets carried on balance sheet at amounts other than fair value | 2,155 | 1,515 |
Investment contracts, included in contractholder funds | 22,923 | 22,449 |
Debt | 543 | 542 |
Total liabilities carried on balance sheet at amounts other than fair value | 23,466 | 22,991 |
Fixed indexed annuities | Level 1 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 0 | 0 |
Fixed indexed annuities | Level 2 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 0 | 0 |
Fixed indexed annuities | Level 3 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 3,303 | 3,235 |
Fixed indexed annuities | Fair Value | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 3,303 | 3,235 |
Fixed indexed annuities | Carrying Value | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 3,303 | 3,235 |
Reinsurance related embedded derivative | Level 1 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 0 | 0 |
Reinsurance related embedded derivative | Level 2 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | (18) | 33 |
Reinsurance related embedded derivative | Level 3 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 0 | 0 |
Reinsurance related embedded derivative | Fair Value | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | (18) | 33 |
Reinsurance related embedded derivative | Carrying Value | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | (18) | 33 |
Preferred shares reimbursement feature embedded derivative | Level 1 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 0 | 0 |
Preferred shares reimbursement feature embedded derivative | Level 2 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 0 | 0 |
Preferred shares reimbursement feature embedded derivative | Level 3 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 37 | 16 |
Preferred shares reimbursement feature embedded derivative | Fair Value | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 37 | 16 |
Preferred shares reimbursement feature embedded derivative | Carrying Value | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 37 | 16 |
Future Policy Benefits | Level 1 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 0 | 0 |
Future Policy Benefits | Level 2 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 0 | 0 |
Future Policy Benefits | Level 3 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 1,904 | 1,953 |
Future Policy Benefits | Fair Value | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 1,904 | 1,953 |
Future Policy Benefits | Carrying Value | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 1,904 | 1,953 |
Asset-backed securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 4,945 | 5,694 |
Asset-backed securities | Level 1 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 0 | 0 |
Asset-backed securities | Level 2 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 4,183 | 4,866 |
Asset-backed securities | Level 3 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 762 | 828 |
Asset-backed securities | Fair Value | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 4,945 | 5,694 |
Asset-backed securities | Carrying Value | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 4,945 | 5,694 |
Commercial mortgage-backed securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 2,481 | 2,922 |
Commercial mortgage-backed securities | Level 1 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 0 | 0 |
Commercial mortgage-backed securities | Level 2 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 2,456 | 2,895 |
Commercial mortgage-backed securities | Level 3 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 25 | 27 |
Commercial mortgage-backed securities | Fair Value | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 2,481 | 2,922 |
Commercial mortgage-backed securities | Carrying Value | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 2,481 | 2,922 |
Corporates | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 10,451 | 11,597 |
Corporates | Level 1 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 0 | 0 |
Corporates | Level 2 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 9,252 | 10,305 |
Corporates | Level 3 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 1,199 | 1,292 |
Corporates | Fair Value | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 10,451 | 11,597 |
Corporates | Carrying Value | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 10,451 | 11,597 |
Hybrids | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 891 | 1,027 |
Hybrids | Level 1 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 267 | 299 |
Hybrids | Level 2 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 621 | 718 |
Hybrids | Level 3 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 3 | 10 |
Hybrids | Fair Value | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 891 | 1,027 |
Hybrids | Carrying Value | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 891 | 1,027 |
Municipals | Level 1 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 0 | 0 |
Municipals | Level 2 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 1,279 | 1,301 |
Municipals | Level 3 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 39 | 42 |
Municipals | Fair Value | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 1,318 | 1,343 |
Municipals | Carrying Value | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 1,318 | 1,343 |
Residential mortgage-backed securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 870 | 954 |
Residential mortgage-backed securities | Level 1 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 0 | 0 |
Residential mortgage-backed securities | Level 2 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 363 | 408 |
Residential mortgage-backed securities | Level 3 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 507 | 546 |
Residential mortgage-backed securities | Fair Value | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 870 | 954 |
Residential mortgage-backed securities | Carrying Value | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 870 | 954 |
U.S. Government | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 43 | 34 |
U.S. Government | Level 1 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 37 | 28 |
U.S. Government | Level 2 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 6 | 6 |
U.S. Government | Level 3 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 0 | 0 |
U.S. Government | Fair Value | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 43 | 34 |
U.S. Government | Carrying Value | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 43 | 34 |
Foreign Governments | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 141 | 155 |
Foreign Governments | Level 1 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 0 | 0 |
Foreign Governments | Level 2 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 125 | 137 |
Foreign Governments | Level 3 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 16 | 18 |
Foreign Governments | Fair Value | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 141 | 155 |
Foreign Governments | Carrying Value | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 141 | 155 |
Other invested assets | Level 1 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 0 | |
Other invested assets | Level 2 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 0 | |
Other invested assets | Level 3 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 40 | |
Other invested assets | Fair Value | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 40 | |
Other invested assets | Carrying Value | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 40 | |
Funds withheld for reinsurance receivables, at fair value | Level 1 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 289 | 314 |
Funds withheld for reinsurance receivables, at fair value | Level 2 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 1,761 | 1,856 |
Funds withheld for reinsurance receivables, at fair value | Level 3 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 0 | 1 |
Funds withheld for reinsurance receivables, at fair value | Fair Value | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | 2,050 | 2,171 |
Funds withheld for reinsurance receivables, at fair value | Carrying Value | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Available-for-sale Securities | $ 2,050 | $ 2,171 |