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Income Taxes (Narratives) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Income Tax Examination |  |  |
Income taxes receivable | $ 147 | $ 174 |
Net operating loss carryforwards | 221 | 177 |
Unrecognized tax benefits | 44 | 45 | $ 61
Unrecognized tax benefits that would impact tax rate | 38 | 38 |
Tax benefits interest expense for unpaid taxes | 3 | 3 | $ 4
Unrecognized tax benefits interest and penalties accrued | 15 | 19 |
Unrecognized tax benefits that may be recognized during the next twelve month period | $ 1 |  |
Recognition period | 12 months |  |
Federal and State |  |  |
Income Tax Examination |  |  |
Net operating loss carryforwards | $ 90 | 68 |
State |  |  |
Income Tax Examination |  |  |
Valuation allowance against net operating loss deferred tax assets | 48 | 48 |
Foreign |  |  |
Income Tax Examination |  |  |
Foreign net operating loss carryforwards resulting in deferred tax assets | $ 131 | $ 110 |

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible foreign operating loss carryforwards. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32621-109319 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32632-109319 + Details
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- Definition Carrying amount as of the balance sheet date of income taxes previously overpaid to tax authorities (such as U.S. Federal, state and local tax authorities) representing refunds of overpayments or recoveries based on agreed-upon resolutions of disputes. Also called income tax refund receivable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(8)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(10)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 + Details
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