Long-Term Debt and Financing Arrangements (Detail) (USD $)	Jun. 28, 2014	Dec. 28, 2013	Jun. 29, 2013
Debt Instrument [Line Items]
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
Long-term Debt, Gross	3,858,000,000	3,809,300,000
Less: Current maturities of long-term debt	(8,700,000)	(9,900,000)
Long-term debt	3,849,300,000	3,799,400,000
Convertible notes payable due in 2018 (junior subordinated)
Debt Instrument [Line Items]
Stated interest rate	4.25%	4.25%
Long-term Debt, Gross	632,500,000	632,500,000
Notes 2 Point 25 Percent due 2018 [Member]
Debt Instrument [Line Items]
Stated interest rate	2.25%
Long-term debt, interest rate		2.25%
Long-term Debt, Gross	345,000,000	345,000,000
Notes payable due 2021
Debt Instrument [Line Items]
Stated interest rate	3.40%
Long-term debt, interest rate		3.40%
Long-term Debt, Gross	395,700,000	382,200,000
Notes Payable due 2022 [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	799,400,000	799,400,000
Notes Payable Maturities 2022 [Member]
Debt Instrument [Line Items]
Stated interest rate	2.90%
Long-term debt, interest rate		2.90%
Notes payable due 2028
Debt Instrument [Line Items]
Stated interest rate	7.05%
Long-term debt, interest rate		7.05%
Long-term Debt, Gross	156,800,000	147,700,000
Notes payable due 2040
Debt Instrument [Line Items]
Stated interest rate	5.20%
Long-term debt, interest rate		5.20%
Long-term Debt, Gross	342,900,000	317,400,000
Notes 5 Point 75 Percent Due 2052 [Member]
Debt Instrument [Line Items]
Stated interest rate	5.75%
Long-term debt, interest rate		5.75%
Long-term Debt, Gross	750,000,000	750,000,000
Notes 5 Point 75 Percent due 2053 [Member]
Debt Instrument [Line Items]
Stated interest rate	5.75%
Long-term debt, interest rate		5.75%
Long-term Debt, Gross	401,100,000	400,000,000
Other, payable in varying amounts through 2021
Debt Instrument [Line Items]
Long-term Debt, Gross	34,600,000	35,100,000
Other, payable in varying amounts through 2021 | Minimum [Member]
Debt Instrument [Line Items]
Stated interest rate	0.00%	0.00%
Other, payable in varying amounts through 2021 | Maximum [Member]
Debt Instrument [Line Items]
Stated interest rate	6.62%	7.14%
Committed Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility Committed Borrowing Capacity			500,000,000
New Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Current Borrowing Capacity			1,500,000,000
Fixed to Floating Interest Rate Swap | Notes payable due 2021
Debt Instrument [Line Items]
Debt instrument, face amount	400,000,000
Fixed to Floating Interest Rate Swap | Notes payable due 2028
Debt Instrument [Line Items]
Debt instrument, face amount	150,000,000
Fixed to Floating Interest Rate Swap | Notes payable due 2040
Debt Instrument [Line Items]
Debt instrument, face amount	$ 400,000,000