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Income Taxes - Reconciliation of Total Gross Unrecognized Tax Benefits (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Reconciliation of the Company's total gross unrecognized tax benefits |  |  |
Balance at beginning of the period | $ 93 | $ 99 | $ 87
Additions and reductions for tax positions of prior years | 3 |  | 16
Additions and reductions for tax positions of prior years |  | (20) |
Additions based on tax positions related to the current year | 3 | 11 | 12
Reductions due to settlements |  |  | (16)
Foreign currency translation | (4) |  |
Foreign currency translation |  | 3 |
Balance at ending of the period | 95 | 93 | 99
Unrecognized tax benefits, which if recognized, would impact the Company's effective income tax rate | 75 | 80 | 86
Accrued interest and penalties | 16 | 14 | 11
Interest and penalties included in tax expense | $ 2 | $ 3 | $ 1

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- Definition Amount of unrecognized tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 10B -URI http://asc.fasb.org/extlink&oid=123427490&loc=SL37586934-109318 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121826272&loc=SL6600010-109319 + Details
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- Definition Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=121826272&loc=SL6600010-109319 + Details
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