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Income Taxes (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2019 | Jun. 30, 2019 | Dec. 31, 2018
Income Tax Disclosure [Abstract] |  |  |
Income tax rate | 23.20% | 24.30% |
Decrease in income tax percentage | 0.034 | 0.006 |
Unrecognized tax benefits | $ 50 | $ 50 | $ 85
Unrecognized tax benefits that would impact the effective tax rate | 43 | 43 | 59
Unrecognized tax benefits that would impact deferred taxes | 7 | 7 | $ 26
Possible decrease in unrecognized tax benefits | $ 20 | $ 20 |

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- Definition Unrecognized Tax Benefits that Would Impact Deferred Tax Rate + References No definition available. + Details
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- Definition Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d)(3) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 + Details
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