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Fair Value - Separate Accounts Fair Value (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Fair Value, Separate Account Investment [Line Items] |  |
Separate accounts assets | $ 3,228 | $ 5,087
Separate accounts liabilities | (3,228) | (5,087)
Recurring |  |
Fair Value, Separate Account Investment [Line Items] |  |
Separate accounts assets | 3,313 | 5,017
Recurring | Other payables |  |
Fair Value, Separate Account Investment [Line Items] |  |
Separate accounts liabilities | (85) |
Recurring | Other receivables |  |
Fair Value, Separate Account Investment [Line Items] |  |
Separate accounts assets |  | 70
Recurring | Cash and cash equivalents |  |
Fair Value, Separate Account Investment [Line Items] |  |
Separate accounts assets | 156 | 188
Recurring | Debt securities |  |
Fair Value, Separate Account Investment [Line Items] |  |
Separate accounts assets | 2,677 | 4,281
Recurring | Equity securities |  |
Fair Value, Separate Account Investment [Line Items] |  |
Separate accounts assets | 0 | 1
Recurring | Common/collective trusts |  |
Fair Value, Separate Account Investment [Line Items] |  |
Separate accounts assets | 480 | 547
Recurring | Level 1 |  |
Fair Value, Separate Account Investment [Line Items] |  |
Separate accounts assets | 714 | 1,235
Recurring | Level 1 | Cash and cash equivalents |  |
Fair Value, Separate Account Investment [Line Items] |  |
Separate accounts assets | 2 | 2
Recurring | Level 1 | Debt securities |  |
Fair Value, Separate Account Investment [Line Items] |  |
Separate accounts assets | 712 | 1,233
Recurring | Level 1 | Equity securities |  |
Fair Value, Separate Account Investment [Line Items] |  |
Separate accounts assets | 0 | 0
Recurring | Level 1 | Common/collective trusts |  |
Fair Value, Separate Account Investment [Line Items] |  |
Separate accounts assets | 0 | 0
Recurring | Level 2 |  |
Fair Value, Separate Account Investment [Line Items] |  |
Separate accounts assets | 2,599 | 3,782
Recurring | Level 2 | Cash and cash equivalents |  |
Fair Value, Separate Account Investment [Line Items] |  |
Separate accounts assets | 154 | 186
Recurring | Level 2 | Debt securities |  |
Fair Value, Separate Account Investment [Line Items] |  |
Separate accounts assets | 1,965 | 3,048
Recurring | Level 2 | Equity securities |  |
Fair Value, Separate Account Investment [Line Items] |  |
Separate accounts assets | 0 | 1
Recurring | Level 2 | Common/collective trusts |  |
Fair Value, Separate Account Investment [Line Items] |  |
Separate accounts assets | 480 | 547
Recurring | Level 3 |  |
Fair Value, Separate Account Investment [Line Items] |  |
Separate accounts assets | 0 | 0
Recurring | Level 3 | Cash and cash equivalents |  |
Fair Value, Separate Account Investment [Line Items] |  |
Separate accounts assets | 0 | 0
Recurring | Level 3 | Debt securities |  |
Fair Value, Separate Account Investment [Line Items] |  |
Separate accounts assets | 0 | 0
Recurring | Level 3 | Equity securities |  |
Fair Value, Separate Account Investment [Line Items] |  |
Separate accounts assets | 0 | 0
Recurring | Level 3 | Common/collective trusts |  |
Fair Value, Separate Account Investment [Line Items] |  |
Separate accounts assets | $ 0 | $ 0

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