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Derivatives - Narrative (Details) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2019 USD ($) swap | Jun. 30, 2018 USD ($) | Jun. 30, 2019 USD ($) swap | Jun. 30, 2018 USD ($) | Dec. 31, 2018 USD ($)
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Carrying value of collateral received to support purchased call options | $ 449,000,000 |  | $ 449,000,000 |  | $ 103,000,000
Total realized/unrealized gains (losses) included in net income for the embedded derivatives related to unlocking of actuarial assumptions |  |  |  | $ 44,000,000 |
Cash Flow Hedges | Designated as Hedging Instrument | Interest rate swaps |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Number of interest rate swaps designated and qualifying as a cash flow hedges | swap | 15 |  | 15 |  |
Notional amount of derivative instrument outstanding | $ 2,140,000,000 |  | $ 2,140,000,000 |  | 2,350,000,000
Gain (loss) reclassified from AOCI into net investment income | 1,000,000 | $ (2,000,000) | (1,000,000) | (1,000,000) |
Gain (loss) on cash flow hedge ineffectiveness recorded in Net Earnings | 0 | $ 0 | 0 | $ 0 |
Collateral receivable supporting interest rate swaps | 76,000,000 |  | 76,000,000 |  | 135,000,000
Other assets | Cash Flow Hedges | Designated as Hedging Instrument | Interest rate swaps |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Net derivatives, at fair value | 54,000,000 |  | 54,000,000 |  | 16,000,000
Other liabilities | Cash Flow Hedges | Designated as Hedging Instrument | Interest rate swaps |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Net derivatives, at fair value | (7,000,000) |  | (7,000,000) |  | $ (46,000,000)
Contract termination | Cash Flow Hedges | Interest rate swaps |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Notional amount of derivative instrument outstanding | $ 138,000,000 |  | $ 138,000,000 |  |

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition The aggregate fair value of assets that are already posted, at the end of the reporting period, as collateral for derivative instruments with credit-risk-related contingent features. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4H -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624258-113959 + Details
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- Definition Amount of right to receive cash collateral under master netting arrangements that have not been offset against derivative liabilities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226016-175313 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109980867&loc=d3e41678-113959 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 + Details
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