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Fair Value - Changes in Level 3 Financial Assets (Details) - Recurring - Level 3 $ in Millions | 12 Months Ended
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Dec. 31, 2019 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Beginning balance | $ 131
Net realized and unrealized capital gains (losses): |
Included in earnings | (20)
Included in other comprehensive income | 23
Purchases | 18
Sales | (47)
Settlements | (13)
Transfers out of Level 3, net | (4)
Ending balance | 88
Foreign securities |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Beginning balance | 3
Net realized and unrealized capital gains (losses): |
Included in earnings | 0
Included in other comprehensive income | 0
Purchases | 2
Sales | 0
Settlements | (1)
Transfers out of Level 3, net | (4)
Ending balance | 0
U.S. corporate securities |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Beginning balance | 67
Net realized and unrealized capital gains (losses): |
Included in earnings | (33)
Included in other comprehensive income | 18
Purchases | 3
Sales | (6)
Settlements | (12)
Transfers out of Level 3, net | 0
Ending balance | 37
Equity securities |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Beginning balance | 54
Net realized and unrealized capital gains (losses): |
Included in earnings | 13
Included in other comprehensive income | 0
Purchases | 13
Sales | (41)
Settlements | 0
Transfers out of Level 3, net | 0
Ending balance | 39
Redeemable preferred securities |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Beginning balance | 7
Net realized and unrealized capital gains (losses): |
Included in earnings | 0
Included in other comprehensive income | 5
Purchases | 0
Sales | 0
Settlements | 0
Transfers out of Level 3, net | 0
Ending balance | $ 12

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- Definition Fair Value, Assets Measured On Recurring Basis, Unobservable Unput Reconciliation, Net Realized And Unrealized Capital Gaines (Losses) [Abstract] + References No definition available. + Details
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- Definition Amount of gain (loss) recognized in income from asset 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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