Long-Term Debt and Financing Arrangements - Additional Information (Detail) - Antidilutive Securities, Name [Domain] - Range [Domain] - USD ($) $ in Millions	Jul. 04, 2015	Jan. 03, 2015
Debt Instrument [Line Items]
Long-term debt fair value adjustment	$ 13.8
Commercial paper borrowings outstanding	416.2	$ 0.0
Commercial paper borrowings capacity	2,000.0
Notes payable due 2021
Debt Instrument [Line Items]
Unamortized gain on terminated swap	$ 9.2
Stated interest rate	3.40%
Notes payable due 2021 | Fixed-to-Floating Interest Rate Swaps Terminated
Debt Instrument [Line Items]
Unamortized gain on terminated swap	$ 11.8
Notes payable due 2021 | Fixed to Floating Interest Rate Swap
Debt Instrument [Line Items]
Debt instrument, face amount	400.0
Unamortized gain on terminated swap	0.3
Notes Payable due 2022 [Member]
Debt Instrument [Line Items]
Long-term Debt	754.3
Debt Instrument, Unamortized Discount	$ 0.5
Notes payable due 2028
Debt Instrument [Line Items]
Stated interest rate	7.05%
Notes payable due 2028 | Fixed to Floating Interest Rate Swap
Debt Instrument [Line Items]
Debt instrument, face amount	$ 150.0
Unamortized gain on terminated swap	2.3
Notes payable due 2040
Debt Instrument [Line Items]
Unamortized gain on terminated swap	0.2
Long-term Debt	$ 37.0
Stated interest rate	5.20%
Notes payable due 2040 | Fixed to Floating Interest Rate Swap
Debt Instrument [Line Items]
Debt instrument, face amount	$ 400.0
Notes 5 Point 75 Percent due 2053 [Member]
Debt Instrument [Line Items]
Long-term Debt	$ 400.0
Stated interest rate	5.75%	5.75%
Notes 5 Point 75 Percent due 2053 [Member] | Fixed to Floating Interest Rate Swap
Debt Instrument [Line Items]
Unamortized gain on terminated swap	$ 1.9
New Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Current Borrowing Capacity	$ 1,500.0