Derivatives and Financial Instruments - Recorded Amounts and Estimated Fair Values of Long-term Debt and Derivative Financial Instruments (Detail) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
Sep. 26, 2015	Dec. 31, 2014
Derivative [Line Items]
Total debt	$ 4,986.4
Recorded Amount
Derivative [Line Items]
Variable rate debt	1,274.2	$ 997.4
Fixed rate debt	3,712.2	2,006.7
Total debt	4,986.4	3,004.1
Fair Value
Derivative [Line Items]
Variable rate debt	1,274.2	997.4
Fixed rate debt	3,782.1	2,070.4
Total debt	5,056.3	3,067.8
Interest Rate Swap [Member]
Derivative [Line Items]
Unrealized Gain (Loss) on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss)	$ (6.1)	$ (7.0)

Represents the aggregate of total long-term debt, including current maturities and short-term debt.

No definition available.

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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 portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate.

+ References

No definition available.

+ Details

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- Definition

The portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a rate subject to change from time to time.

+ References

No definition available.

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- Definition

Amount of unrealized gain (loss) related to the increase or decrease in fair value of interest rate derivatives designated as cash flow hedging instruments, which was recorded in accumulated other comprehensive income to the extent that the cash flow hedge was determined to be effective.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4C

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959

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