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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 | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Fair Value Assets Measured on Recurring Basis Unobservable Input Reconciliation Calculation Rollforward |  |  |  |
Balance at beginning of period | $ 714 | $ 730 | $ 697 | $ 837
Total gains (losses) included in: net income | 10 | 11 | 36 | 15
Total gains (losses) included in: OCI | 2 | (1) | 6 | (3)
Transfers into Level 3 | 2 | 25 | 20 | 34
Transfers out of Level 3 | (115) | (26) | (162) | (141)
Purchases | 72 | 91 | 188 | 205
Sales | (72) | (23) | (165) | (132)
Issues | 0 | 0 | 0 | 0
Settlements | (3) | (30) | (10) | (38)
Balance at end of period | 610 | 777 | 610 | 777
Fair Value Liabilities Measured on Recurring Basis Unobservable Input Reconciliation Calculation |  |  |  |
Balance at the beginning of the period | (251) | (262) | (224) | (286)
Total gains (losses) included in: net income | (12) | 1 | (40) | 24
Total gains (losses) included in: OCI | 0 | 0 | 0 | 0
Transfers into Level 3 | (175) | 0 | (175) | 0
Transfers out of Level 3 | 0 | 0 | 0 | 0
Purchases | 0 | 0 | 0 | 0
Sales | 0 | 0 | 0 | 0
Issues | 0 | 0 | 0 | (1)
Settlements | 1 | 1 | 2 | 3
Balance at the end of the period | (437) | (260) | (437) | (260)
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) | 12 | (4) | 39
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 | 5 | 11 | 31 | 15
Fair value assets and liabilities measured on recurring basis, gain (loss) included in earnings |  |  |  |
Change in unrealized gain (loss) | 4 | 13 | 8 | 15
Net Investment Income |  |  |  |
Fair Value Assets Measured on Recurring Basis Unobservable Input Reconciliation Calculation Rollforward |  |  |  |
Total gains (losses) included in: net income | 5 |  | 5 |
Interest credited to contractholder funds |  |  |  |
Fair value assets and liabilities measured on recurring basis, gain (loss) included in earnings |  |  |  |
Change in unrealized gain (loss) | (7) |  | (43) | 19
Life contract benefits |  |  |  |
Fair value assets and liabilities measured on recurring basis, gain (loss) included in earnings |  |  |  |
Change in unrealized gain (loss) | (5) | 1 | 3 | 5
Municipal |  |  |  |
Fair Value Assets Measured on Recurring Basis Unobservable Input Reconciliation Calculation Rollforward |  |  |  |
Balance at beginning of period | 68 | 96 | 70 | 101
Total gains (losses) included in: net income | 0 | 0 | 0 | 1
Total gains (losses) included in: OCI | 1 | 0 | 2 | (1)
Transfers into Level 3 | 0 | 0 | 0 | 0
Transfers out of Level 3 | (5) | 0 | (5) | (2)
Purchases | 0 | 10 | 0 | 10
Sales | (1) | 0 | (3) | (2)
Issues | 0 | 0 | 0 | 0
Settlements | 0 | 0 | (1) | (1)
Balance at end of period | 63 | 106 | 63 | 106
Corporate - public |  |  |  |
Fair Value Assets Measured on Recurring Basis Unobservable Input Reconciliation Calculation Rollforward |  |  |  |
Balance at beginning of period | 90 | 77 | 70 | 108
Total gains (losses) included in: net income | 0 | 0 | 0 | 0
Total gains (losses) included in: OCI | 1 | (1) | 2 | (2)
Transfers into Level 3 | 0 | 0 | 0 | 4
Transfers out of Level 3 | (40) | 0 | (40) | (5)
Purchases | 0 | 0 | 20 | 0
Sales | (5) | 0 | (5) | (26)
Issues | 0 | 0 | 0 | 0
Settlements | 0 | 0 | (1) | (3)
Balance at end of period | 46 | 76 | 46 | 76
Corporate - privately placed |  |  |  |
Fair Value Assets Measured on Recurring Basis Unobservable Input Reconciliation Calculation Rollforward |  |  |  |
Balance at beginning of period | 90 | 215 | 90 | 224
Total gains (losses) included in: net income | 1 | (2) | (1) | (2)
Total gains (losses) included in: OCI | 0 | 0 | 2 | (1)
Transfers into Level 3 | 0 | 20 | 15 | 20
Transfers out of Level 3 | (2) | (10) | (2) | (29)
Purchases | 1 | 2 | 1 | 15
Sales | 0 | (3) | (13) | (3)
Issues | 0 | 0 | 0 | 0
Settlements | (1) | (27) | (3) | (29)
Balance at end of period | 89 | 195 | 89 | 195
ABS - CDO |  |  |  |
Fair Value Assets Measured on Recurring Basis Unobservable Input Reconciliation Calculation Rollforward |  |  |  |
Balance at beginning of period | 6 | 10 | 6 | 99
Total gains (losses) included in: net income | 0 | 0 | 0 | 0
Total gains (losses) included in: OCI | 0 | 0 | 0 | 0
Transfers into Level 3 | 1 | 0 | 1 | 0
Transfers out of Level 3 | 0 | 0 | 0 | (89)
Purchases | 3 | 0 | 3 | 0
Sales | 0 | 0 | 0 | 0
Issues | 0 | 0 | 0 | 0
Settlements | 0 | (1) | 0 | (1)
Balance at end of period | 10 | 9 | 10 | 9
ABS - consumer and other |  |  |  |
Fair Value Assets Measured on Recurring Basis Unobservable Input Reconciliation Calculation Rollforward |  |  |  |
Balance at beginning of period | 81 | 62 | 63 | 48
Total gains (losses) included in: net income | 0 | 0 | 0 | 0
Total gains (losses) included in: OCI | 0 | 0 | 0 | 1
Transfers into Level 3 | 0 | 5 | 0 | 10
Transfers out of Level 3 | (68) | (16) | (115) | (16)
Purchases | 43 | 30 | 121 | 75
Sales | (12) | (7) | (22) | (42)
Issues | 0 | 0 | 0 | 0
Settlements | (1) | (1) | (4) | (3)
Balance at end of period | 43 | 73 | 43 | 73
Residential mortgage-backed securities (“RMBS”) |  |  |  |
Fair Value Assets Measured on Recurring Basis Unobservable Input Reconciliation Calculation Rollforward |  |  |  |
Balance at beginning of period |  |  | 0 |
Total gains (losses) included in: net income | 0 |  | 0 |
Total gains (losses) included in: OCI | 0 |  | 0 |
Transfers into Level 3 | 1 |  | 1 |
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 | 0 | 1 | 0
Commercial mortgage-backed securities (“CMBS”) |  |  |  |
Fair Value Assets Measured on Recurring Basis Unobservable Input Reconciliation Calculation Rollforward |  |  |  |
Balance at beginning of period | 35 | 27 | 26 | 26
Total gains (losses) included in: net income | 0 | 0 | 0 | 0
Total gains (losses) included in: OCI | 0 | 0 | 0 | 0
Transfers into Level 3 | 0 | 0 | 3 | 0
Transfers out of Level 3 | 0 | 0 | 0 | 0
Purchases | 0 | 0 | 6 | 1
Sales | 0 | 0 | 0 | 0
Issues | 0 | 0 | 0 | 0
Settlements | (1) | (1) | (1) | (1)
Balance at end of period | 34 | 26 | 34 | 26
Fixed income securities |  |  |  |
Fair Value Assets Measured on Recurring Basis Unobservable Input Reconciliation Calculation Rollforward |  |  |  |
Balance at beginning of period | 370 | 487 | 325 | 606
Total gains (losses) included in: net income | 1 | (2) | (1) | (1)
Total gains (losses) included in: OCI | 2 | (1) | 6 | (3)
Transfers into Level 3 | 2 | 25 | 20 | 34
Transfers out of Level 3 | (115) | (26) | (162) | (141)
Purchases | 47 | 42 | 151 | 101
Sales | (18) | (10) | (43) | (73)
Issues | 0 | 0 | 0 | 0
Settlements | (3) | (30) | (10) | (38)
Balance at end of period | 286 | 485 | 286 | 485
Equity securities |  |  |  |
Fair Value Assets Measured on Recurring Basis Unobservable Input Reconciliation Calculation Rollforward |  |  |  |
Balance at beginning of period | 303 | 242 | 341 | 210
Total gains (losses) included in: net income | 10 | 13 | 38 | 16
Total gains (losses) included in: OCI | 0 | 0 | 0 | 0
Transfers into Level 3 | 0 | 0 | 0 | 0
Transfers out of Level 3 | 0 | 0 | 0 | 0
Purchases | 20 | 49 | 22 | 79
Sales | (14) | (13) | (82) | (14)
Issues | 0 | 0 | 0 | 0
Settlements | 0 | 0 | 0 | 0
Balance at end of period | 319 | 291 | 319 | 291
Short-term investments |  |  |  |
Fair Value Assets Measured on Recurring Basis Unobservable Input Reconciliation Calculation Rollforward |  |  |  |
Balance at beginning of period | 40 | 0 | 30 | 20
Total gains (losses) included in: net income | 0 | 0 | 0 | 0
Total gains (losses) included in: OCI | 0 | 0 | 0 | 0
Transfers into Level 3 | 0 | 0 | 0 | 0
Transfers out of Level 3 | 0 | 0 | 0 | 0
Purchases | 5 | 0 | 15 | 25
Sales | (40) | 0 | (40) | (45)
Issues | 0 | 0 | 0 | 0
Settlements | 0 | 0 | 0 | 0
Balance at end of period | 5 | 0 | 5 | 0
Free-standing derivatives, net |  |  |  |
Fair Value Assets Measured on Recurring Basis Unobservable Input Reconciliation Calculation Rollforward |  |  |  |
Balance at beginning of period | 1 | 1 | 1 | 1
Total gains (losses) included in: net income | (1) | 0 | (1) | 0
Total gains (losses) included in: OCI | 0 | 0 | 0 | 0
Transfers into Level 3 | 0 | 0 | 0 | 0
Transfers out of Level 3 | 0 | 0 | 0 | 0
Purchases | 0 | 0 | 0 | 0
Sales | 0 | 0 | 0 | 0
Issues | 0 | 0 | 0 | 0
Settlements | 0 | 0 | 0 | 0
Balance at end of period | 0 | 1 | 0 | 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 | (251) | (262) | (224) | (286)
Total gains (losses) included in: net income | (12) | 1 | (40) | 24
Total gains (losses) included in: OCI | 0 | 0 | 0 | 0
Transfers into Level 3 | (175) | 0 | (175) | 0
Transfers out of Level 3 | 0 | 0 | 0 | 0
Purchases | 0 | 0 | 0 | 0
Sales | 0 | 0 | 0 | 0
Issues | 0 | 0 | 0 | (1)
Settlements | 1 | 1 | 2 | 3
Balance at the end of the period | $ (437) | $ (260) | $ (437) | $ (260)

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- Definition Amount of gain (loss) recognized in income from asset and liability measured at fair value on recurring basis using unobservable input (level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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