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Fair Value Measurements and Other Financial Instruments - Carrying Amounts and Estimated Fair Values of Debt (Parenthetical) (Detail) - USD ($) $ in Millions | 6 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jun. 30, 2016 | Dec. 31, 2015 | Jan. 01, 2016
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |
Unamortized debt issuance costs |  |  | $ 36
Term Loan A Due July 2017 [Member] |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |
Debt maturity month and year, Term loan | 2017-07 | 2017-07 |
Term Loan A Due July 2019 [Member] |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |
Debt maturity month and year, Term loan | 2019-07 | 2019-07 |
6.50% Senior Notes Due December 2020 [Member] |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |
Debt interest rate | 6.50% | 6.50% |
Debt maturity month and year, Senior notes | 2020-12 | 2020-12 |
4.875% Senior Notes due December 2022 [Member] |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |
Debt interest rate | 4.875% | 4.875% |
Debt maturity month and year, Senior notes | 2022-12 | 2022-12 |
5.25% Senior Notes Due April 2023 [Member] |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |
Debt interest rate | 5.25% | 5.25% |
Debt maturity month and year, Senior notes | 2023-04 | 2023-04 |
4.50% Senior Notes due September 2023 [Member] |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |
Debt interest rate | 4.50% | 4.50% |
Debt maturity month and year, Senior notes | 2023-09 | 2023-09 |
5.125% Senior Notes due December 2024 [Member] |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |
Debt interest rate | 5.125% | 5.125% |
Debt maturity month and year, Senior notes | 2024-12 | 2024-12 |
5.50% Senior Notes due September 2025 [Member] |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |
Debt interest rate | 5.50% | 5.50% |
Debt maturity month and year, Senior notes | 2025-09 | 2025-09 |
6.875% Senior Notes Due July 2033 [Member] |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |
Debt interest rate | 6.875% | 6.875% |
Debt maturity month and year, Senior notes | 2033-07 | 2033-07 |

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- Definition Line of credit facility maturity month and year. + References No definition available. + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + 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 The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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