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Fair Value of Assets and Liabilities - Rollforward of level 3 assets and liabilities held at fair value on a recurring basis during the period (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Fair Value Assets Measured on Recurring Basis Unobservable Input Reconciliation Calculation Rollforward |  |
Balance at beginning of period | $ 697 | $ 837
Total gains (losses) included in: net income | 26 | 4
Total gains (losses) included in: OCI | 4 | (2)
Transfers into Level 3 | 18 | 9
Transfers out of Level 3 | (47) | (115)
Purchases | 116 | 114
Sales | (93) | (109)
Issues | 0 | 0
Settlements | (7) | (8)
Balance at end of period | 714 | 730
Fair Value Liabilities Measured on Recurring Basis Unobservable Input Reconciliation Calculation |  |
Balance at the beginning of the period | (224) | (286)
Total gains (losses) included in: net income | (28) | 23
Total gains (losses) included in: OCI | 0 | 0
Transfers into Level 3 | 0 | 0
Transfers out of Level 3 | 0 | 0
Purchases | 0 | 0
Sales | 0 | 0
Issues | 0 | (1)
Settlements | 1 | 2
Balance at the end of the period | (251) | (262)
Fair value assets and liabilities measured on recurring basis, gain (loss) included in earnings |  |
Total realized and unrealized gains (losses) included in net income, recurring Level 3 assets and liabilities | (2) | 27
Free-standing derivatives | 1 | 1
Realized capital gains (losses) |  |
Fair Value Assets Measured on Recurring Basis Unobservable Input Reconciliation Calculation Rollforward |  |
Total gains (losses) included in: net income | 26 | 4
Fair value assets and liabilities measured on recurring basis, gain (loss) included in earnings |  |
Change in unrealized gain (loss) | 4 | 2
Interest credited to contractholder funds |  |
Fair Value Assets Measured on Recurring Basis Unobservable Input Reconciliation Calculation Rollforward |  |
Total gains (losses) included in: net income |  | 19
Fair value assets and liabilities measured on recurring basis, gain (loss) included in earnings |  |
Change in unrealized gain (loss) | (36) | 19
Life contract benefits |  |
Fair value assets and liabilities measured on recurring basis, gain (loss) included in earnings |  |
Change in unrealized gain (loss) | 8 | 4
Municipal |  |
Fair Value Assets Measured on Recurring Basis Unobservable Input Reconciliation Calculation Rollforward |  |
Balance at beginning of period | 70 | 101
Total gains (losses) included in: net income | 0 | 1
Total gains (losses) included in: OCI | 1 | (1)
Transfers into Level 3 | 0 | 0
Transfers out of Level 3 | 0 | (2)
Purchases | 0 | 0
Sales | (2) | (2)
Issues | 0 | 0
Settlements | (1) | (1)
Balance at end of period | 68 | 96
Corporate - public |  |
Fair Value Assets Measured on Recurring Basis Unobservable Input Reconciliation Calculation Rollforward |  |
Balance at beginning of period | 70 | 108
Total gains (losses) included in: net income | 0 | 0
Total gains (losses) included in: OCI | 1 | (1)
Transfers into Level 3 | 0 | 4
Transfers out of Level 3 | 0 | (5)
Purchases | 20 | 0
Sales | 0 | (26)
Issues | 0 | 0
Settlements | (1) | (3)
Balance at end of period | 90 | 77
Corporate - privately placed |  |
Fair Value Assets Measured on Recurring Basis Unobservable Input Reconciliation Calculation Rollforward |  |
Balance at beginning of period | 90 | 224
Total gains (losses) included in: net income | (2) | 0
Total gains (losses) included in: OCI | 2 | (1)
Transfers into Level 3 | 15 | 0
Transfers out of Level 3 | 0 | (19)
Purchases | 0 | 13
Sales | (13) | 0
Issues | 0 | 0
Settlements | (2) | (2)
Balance at end of period | 90 | 215
ABS - CDO |  |
Fair Value Assets Measured on Recurring Basis Unobservable Input Reconciliation Calculation Rollforward |  |
Balance at beginning of period | 6 | 99
Total gains (losses) included in: net income | 0 | 0
Total gains (losses) included in: OCI | 0 | 0
Transfers into Level 3 | 0 | 0
Transfers out of Level 3 | 0 | (89)
Purchases | 0 | 0
Sales | 0 | 0
Issues | 0 | 0
Settlements | 0 | 0
Balance at end of period | 6 | 10
ABS - consumer and other |  |
Fair Value Assets Measured on Recurring Basis Unobservable Input Reconciliation Calculation Rollforward |  |
Balance at beginning of period | 63 | 48
Total gains (losses) included in: net income | 0 | 0
Total gains (losses) included in: OCI | 0 | 1
Transfers into Level 3 | 0 | 5
Transfers out of Level 3 | (47) | 0
Purchases | 78 | 45
Sales | (10) | (35)
Issues | 0 | 0
Settlements | (3) | (2)
Balance at end of period | 81 | 62
Commercial mortgage-backed securities (“CMBS”) |  |
Fair Value Assets Measured on Recurring Basis Unobservable Input Reconciliation Calculation Rollforward |  |
Balance at beginning of period | 26 | 26
Total gains (losses) included in: net income | 0 | 0
Total gains (losses) included in: OCI | 0 | 0
Transfers into Level 3 | 3 | 0
Transfers out of Level 3 | 0 | 0
Purchases | 6 | 1
Sales | 0 | 0
Issues | 0 | 0
Settlements | 0 | 0
Balance at end of period | 35 | 27
Fixed income securities |  |
Fair Value Assets Measured on Recurring Basis Unobservable Input Reconciliation Calculation Rollforward |  |
Balance at beginning of period | 325 | 606
Total gains (losses) included in: net income | (2) | 1
Total gains (losses) included in: OCI | 4 | (2)
Transfers into Level 3 | 18 | 9
Transfers out of Level 3 | (47) | (115)
Purchases | 104 | 59
Sales | (25) | (63)
Issues | 0 | 0
Settlements | (7) | (8)
Balance at end of period | 370 | 487
Equity securities |  |
Fair Value Assets Measured on Recurring Basis Unobservable Input Reconciliation Calculation Rollforward |  |
Balance at beginning of period | 341 | 210
Total gains (losses) included in: net income | 28 | 3
Total gains (losses) included in: OCI | 0 | 0
Transfers into Level 3 | 0 | 0
Transfers out of Level 3 | 0 | 0
Purchases | 2 | 30
Sales | (68) | (1)
Issues | 0 | 0
Settlements | 0 | 0
Balance at end of period | 303 | 242
Short-term investments |  |
Fair Value Assets Measured on Recurring Basis Unobservable Input Reconciliation Calculation Rollforward |  |
Balance at beginning of period | 30 | 20
Total gains (losses) included in: net income | 0 | 0
Total gains (losses) included in: OCI | 0 | 0
Transfers into Level 3 | 0 | 0
Transfers out of Level 3 | 0 | 0
Purchases | 10 | 25
Sales | 0 | (45)
Issues | 0 | 0
Settlements | 0 | 0
Balance at end of period | 40 | 0
Free-standing derivatives, net |  |
Fair Value Assets Measured on Recurring Basis Unobservable Input Reconciliation Calculation Rollforward |  |
Balance at beginning of period | 1 | 1
Total gains (losses) included in: net income | 0 | 0
Total gains (losses) included in: OCI | 0 | 0
Transfers into Level 3 | 0 | 0
Transfers out of Level 3 | 0 | 0
Purchases | 0 | 0
Sales | 0 | 0
Issues | 0 | 0
Settlements | 0 | 0
Balance at end of period | 1 | 1
Derivatives embedded in life and annuity contracts |  |
Fair Value Liabilities Measured on Recurring Basis Unobservable Input Reconciliation Calculation |  |
Balance at the beginning of the period | (224) | (286)
Total gains (losses) included in: net income | (28) | 23
Total gains (losses) included in: OCI | 0 | 0
Transfers into Level 3 | 0 | 0
Transfers out of Level 3 | 0 | 0
Purchases | 0 | 0
Sales | 0 | 0
Issues | 0 | (1)
Settlements | 1 | 2
Balance at the end of the period | $ (251) | $ (262)

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