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Debt, Lease Financing, Fair Value and Debt Covenants (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2017 | Mar. 31, 2016 | Dec. 31, 2016
Secured Debt [Member] | Term Loan [Member] | Level 1 [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Fair value of debt instrument | $ 1,500 |  | $ 1,500
Senior Notes [Member] | Senior Notes due 2020 [Member] | Level 1 [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Fair value of debt instrument | 903 |  | 841
Senior Notes [Member] | Senior Notes due 2022 [Member] | Level 1 [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Fair value of debt instrument | $ 605 |  | 544
Lease Financing [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Weighted average interest rate | 14.00% |  |
Assets recorded under capital lease obligations | $ 21 |  | 21
Accumulated amortization related to assets recorded under capital lease obligations | 7 |  | $ 6
Lease Financing [Member] | Maximum [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Payments on capital leases | $ 1 | $ 1 |

X
- Definition Amount before accumulated depreciation of leased physical assets used in the normal conduct of business to produce goods and services. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6455314&loc=d3e45014-112735 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition The total charge for the use of long-lived depreciable assets subject to a lease meeting the criteria for capitalization. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6455314&loc=d3e45014-112735 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 2) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Weighted average interest rate of debt outstanding. + References No definition available. + Details
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Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References No definition available. + Details
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Balance Type: | credit
Period Type: | instant

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- Definition The cash outflow for the obligation for a lease meeting the criteria for capitalization (with maturities exceeding one year or beyond the operating cycle of the entity, if longer). + 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 (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3291-108585 + Details
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Period Type: | duration

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- Details
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- Details
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- Details
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- Details
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