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Basis Of Presentation Recently Adopted Accounting Pronouncements (Details) - USD ($) $ in Millions | 9 Months Ended
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Sep. 30, 2016 | Sep. 30, 2015
New Accounting Pronouncements [Abstract] |  |
Cumulative Effect of New Accounting Principle in Period of Adoption | $ 5 |
Payments Related to Tax Withholding for Share-based Compensation | $ (6) | $ (5)

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- Definition New Accounting Pronouncements [Abstract] + References No definition available. + Details
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- Definition Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption. + References No definition available. + Details
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- Definition Amount of cash outflow to satisfy an employee's income tax withholding obligation as part of a net-share settlement of a share-based award. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3291-108585 + Details
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