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Accounting Principles and Practices (Narrative) (Details) $ in Millions | Dec. 31, 2015 USD ($)
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Accounting Standard Update 2015-03 [Member] | Other Current Assets [Member] |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |
Deferred financing costs | $ 4
Accounting Standard Update 2015-03 [Member] | Other Noncurrent Assets [Member] |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |
Deferred financing costs | 33
Accounting Standard Update 2015-03 [Member] | Long-term Debt [Member] |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |
Deferred financing costs | (37)
New Accounting Pronouncement, Early Adoption, Effect [Member] | Non-current Deferred Tax Asset [Member] |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |
Deferred income tax asset, net | 92
New Accounting Pronouncement, Early Adoption, Effect [Member] | Non-current Deferred Tax Liabilities [Member] |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |
Deferred income tax asset, net | $ (139)

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