Long-Term Debt and Financing Arrangements - Additional Information (Detail) (USD $)	Jun. 28, 2014	Dec. 28, 2013	Jun. 29, 2013
Debt Instrument [Line Items]
Unamortized gain on terminated swap	$ 17,600,000
Long-term debt fair value adjustment	14,800,000
Commercial paper borrowings outstanding	474,200,000	368,000,000
Commercial paper borrowings capacity	2,000,000,000		2,000,000,000
Notes payable due 2021
Debt Instrument [Line Items]
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	13,600,000
Notes payable due 2021 | Fixed to Floating Interest Rate Swap
Debt Instrument [Line Items]
Debt instrument, face amount	400,000,000
Unamortized gain on terminated swap	300,000
Notes Payable due 2022 [Member]
Debt Instrument [Line Items]
Long-term Debt	800,000,000
Debt Instrument, Unamortized Discount	600,000
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	150,000,000
Unamortized gain on terminated swap	8,000,000
Notes payable due 2040
Debt Instrument [Line Items]
Unamortized gain on terminated swap	300,000
Long-term Debt	34,200,000
Stated interest rate	5.20%
Notes payable due 2040 | Fixed to Floating Interest Rate Swap
Debt Instrument [Line Items]
Debt instrument, face amount	400,000,000
Unamortized gain on terminated swap	22,600,000
Notes 5 Point 75 Percent due 2053 [Member]
Debt Instrument [Line Items]
Long-term Debt	400,000,000
Stated interest rate	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	$ 1,100,000