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SCHEDULE II Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
SEC Schedule, 12-09, Allowance, Credit Loss |  |  |
Allowance for valuation and qualifying accounts |  |  |
Balance at Beginning of Period | $ 81 | $ 31 | $ 35
Additions | (2) | 56 | 9
Deductions | 25 | 12 | 13
Balance at End of Period | 54 | 81 | 31
SEC Schedule, 12-09, Allowance, Credit Loss | Cumulative Effect, Period of Adoption, Adjusted Balance |  |  |
Allowance for valuation and qualifying accounts |  |  |
Balance at Beginning of Period |  | 37 |
Balance at End of Period |  |  | 37
Tax-Related valuation allowance |  |  |
Allowance for valuation and qualifying accounts |  |  |
Balance at Beginning of Period | 298 | 189 | 228
Additions |  | 109 |
Deductions | 238 |  | 39
Balance at End of Period | $ 60 | $ 298 | $ 189

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- Definition Amount of valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column B)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column E)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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