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Debt - Summary of Long-Term Debt (Detail) - USD ($) $ in Millions | Sep. 26, 2015 | Dec. 31, 2014 | Nov. 30, 2014
--- | --- | --- | ---
Debt Instrument [Line Items] |  |  |  |
Long-term debt, total | $ 1,979.5 |  | $ 1,718.7 |
Less — Current portion | (16.9) | [1] | (243.7) |
Long-term debt | 1,962.6 | [1] | 1,475.0 |
Other |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term debt, total | 7.6 |  | 0.0 |
Credit Agreement — Term Loan Facility | Term Loan Facility |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term debt, total | $ 496.9 |  | $ 0.0 |
Weighted Average Interest Rate | 1.65% |  |  |
8.125% Senior Notes due 2020 | Senior notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term debt, stated coupon rate | 8.125% |  | 8.125% |
Long-term debt, total | $ 0.0 |  | $ 243.7 |
Weighted Average Interest Rate |  |  | 8.25% |
4.75% Senior Notes due 2023 | Senior notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term debt, stated coupon rate | 4.75% |  | 4.75% |
Long-term debt, total | $ 500.0 |  | $ 500.0 |
Weighted Average Interest Rate | 4.75% |  | 4.75% |
5.375% Senior Notes due 2024 | Senior notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term debt, stated coupon rate | 5.375% |  | 5.375% |
Long-term debt, total | $ 325.0 |  | $ 325.0 |
Weighted Average Interest Rate | 5.375% |  | 5.375% |
5.25% Senior Notes due 2025 | Senior notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term debt, stated coupon rate | 5.25% |  | 5.25% | 5.25%
Long-term debt, total | $ 650.0 |  | $ 650.0 |
Weighted Average Interest Rate | 5.25% |  | 5.25% |
[1] | Unaudited.

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- Definition Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13,16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + 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 Amount of long-term debt and capital lease obligation due after one year or beyond the normal operating cycle, if longer. + 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) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section H + Details
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