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Income Taxes (Net Operating Losses and Credits) (Details) - USD ($) $ in Millions | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Operating Loss Carryforwards [Line Items] |  |
U.S. Federal Tax credits | $ 7 | $ 7
Federal Tax Authority |  |
Operating Loss Carryforwards [Line Items] |  |
Net Operating Loss Carryforward, Subject to Expiration | 2 |
U.S. Federal Tax credits | 7 |
Foreign Tax Authority |  |
Operating Loss Carryforwards [Line Items] |  |
Net Operating Loss Carryforward, Subject to Expiration | 3 |
Net Operating Loss Carryforward, Not Subject to Expiration | 34 |
State and local jurisdiction |  |
Operating Loss Carryforwards [Line Items] |  |
Net Operating Loss Carryforward, Subject to Expiration | $ 1 |

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards that are not subject to expiration dates. + References No definition available. + Details
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- Definition Amount, before allocation of a valuation allowances, of deferred tax assets attributable to deductible tax credit carryforwards including, but not limited to, research, foreign, general business, alternative minimum tax, and other deductible tax credit carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32621-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32559-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Carryforwards -URI http://asc.fasb.org/extlink&oid=6506874 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32632-109319 + Details
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