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Income Taxes - Additional Information (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Income from domestic operations | $ 2,222 | $ 2,644 | $ 1,753
Losses from foreign operations | (102) | 84 | 0
Effective Income Tax Rate Reconciliation, Tax Cuts and Jobs Act, Amount | (6) | 0 | (39)
Current State and Local Tax Expense (Benefit) | 3 | 5 | 4
Deferred Tax Assets, Operating Loss Carryforwards | 11 | 84 |
Deferred Tax Assets, Valuation Allowance | 4 | 4 |
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount | (11) |  |
Effective Income Tax Rate Reconciliation, Disposition of Business, Amount | 8 | 0 | 0
Income Tax Examination, Penalties and Interest Expense | 1 | 1 | 0
Income Tax Examination, Interest Accrued | 0 | $ 0 | 0
Non-insurance carryback [Member] |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount | 6 |  |
Foreign Tax Authority [Member] |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Deferred Tax Assets, Operating Loss Carryforwards | 11 |  |
Deferred Tax Assets, Valuation Allowance | $ 4 |  |
Discontinued Operations, Held-for-sale or Disposed of by Sale [Member] |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Income Taxes Receivable, Current |  |  | $ 5

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- Definition Amount of reported income tax expense (benefit) in excess of (less than) expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operations, attributable to Tax Cuts and Jobs Act. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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