Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
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| Income Tax Uncertainties [Abstract] | |||
| Balance at beginning of year | $ 75 | $ 70 | $ 71 |
| Additions based on tax positions related to the current year | 7 | 5 | 9 |
| Additions for tax positions of prior years | 7 | 14 | 2 |
| Reductions for tax positions of prior years | (1) | (3) | |
| Lapse of statute and settlements | (5) | (11) | (12) |
| Balance at end of year | 83 | 75 | 70 |
| Unrecognized Tax Benefits that Would Impact Effective Tax Rate | 66 | 61 | 56 |
| Reasonably possible change in unrecognized tax benefit within 12 months | 3 | ||
| Accrued interest and penalties related to uncertain tax positions | $ 25 | $ 23 | $ 20 |
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- References No definition available.
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- Definition The amount of the unrecognized tax benefit of a position taken for which it is reasonably possible that the total amount thereof will significantly increase or decrease within twelve months of the balance sheet date. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of unrecognized tax benefits. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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