Long-Term Debt and Financing Arrangements - Additional Information (Detail) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Dec. 30, 2017	Apr. 01, 2017	Jan. 01, 2017
Debt Instrument [Line Items]
Commercial Paper Current Borrowing Capacity			$ 2,000.0
Deferred Finance Costs, Net	$ (34.6)
Long-term Debt	$ 3,810.1	$ 3,805.7
Document Period End Date	Jun. 30, 2018
Debt instrument, face amount	$ 3,840.0
Debt Instrument, Unamortized Discount	(0.6)
Deferred (Gain) Loss on Discontinuation of Fair Value Hedge	(5.3)
Long-term debt fair value adjustment	10.6
Commercial paper borrowings outstanding	1,100.0	0.0
Commercial paper borrowings capacity	3,000.0	3,000.0	$ 3,000.0
Long-term Debt, Current Maturities	(978.9)	(977.5)
Long-term Debt, Excluding Current Maturities	$ 2,831.2	2,828.2
sub-limit on revolving credit facility		400.0		$ 400.0
Notes 2 Point 45 Percent due 2018 [Member] [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	2.45%
Deferred Finance Costs, Net	$ (0.7)
Long-term Debt	631.8	630.9
Debt instrument, face amount	632.5
Notes 2 Point 45 Percent due 2018 [Member] [Member] | Fixed-to-Floating Interest Rate Swaps Terminated
Debt Instrument [Line Items]
Deferred (Gain) Loss on Discontinuation of Fair Value Hedge	0.0
Long-term debt fair value adjustment	0.0
Notes 2 Point 45 Percent due 2018 [Member] [Member] | Fixed to Floating Interest Rate Swap
Debt Instrument [Line Items]
Debt Instrument, Unamortized Discount	0.0
Notes 1 Point 62 Percent due 2018 [Member]
Debt Instrument [Line Items]
Deferred Finance Costs, Net	(0.4)
Long-term Debt	344.6	344.1
Debt instrument, face amount	$ 345.0
Stated interest rate	1.62%
Notes 1 Point 62 Percent due 2018 [Member] | Fixed-to-Floating Interest Rate Swaps Terminated
Debt Instrument [Line Items]
Deferred (Gain) Loss on Discontinuation of Fair Value Hedge	$ 0.0
Long-term debt fair value adjustment	0.0
Notes 1 Point 62 Percent due 2018 [Member] | Fixed to Floating Interest Rate Swap
Debt Instrument [Line Items]
Debt Instrument, Unamortized Discount	$ 0.0
Notes payable due 2021
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	3.40%
Long-term Debt	$ 410.6	412.1
Notes 3 Point 4 Percent Due in 2021 [Member]
Debt Instrument [Line Items]
Deferred Finance Costs, Net	(1.1)
Notes 3 Point 4 Percent Due in 2021 [Member] | Fixed-to-Floating Interest Rate Swaps Terminated
Debt Instrument [Line Items]
Deferred (Gain) Loss on Discontinuation of Fair Value Hedge	11.8
Long-term debt fair value adjustment	0.0
Notes 3 Point 4 Percent Due in 2021 [Member] | Fixed to Floating Interest Rate Swap
Debt Instrument [Line Items]
Debt instrument, face amount	400.0
Debt Instrument, Unamortized Discount	(0.1)
Notes Payable due 2022 [Member]
Debt Instrument [Line Items]
Debt instrument, face amount	754.3
Debt Instrument, Unamortized Discount	$ (0.3)
Notes Payable Maturities 2022 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	2.90%
Deferred Finance Costs, Net	$ (2.7)
Long-term Debt	751.3	750.9
Notes Payable Maturities 2022 [Member] | Fixed-to-Floating Interest Rate Swaps Terminated
Debt Instrument [Line Items]
Deferred (Gain) Loss on Discontinuation of Fair Value Hedge	0.0
Long-term debt fair value adjustment	$ 0.0
Notes payable due 2028
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	7.05%
Deferred Finance Costs, Net	$ 0.0
Long-term Debt	171.5	172.6
Notes payable due 2028 | Fixed to Floating Interest Rate Swap
Debt Instrument [Line Items]
Debt instrument, face amount	150.0
Deferred (Gain) Loss on Discontinuation of Fair Value Hedge	10.9
Long-term debt fair value adjustment	10.6
Notes 7 Point 05 Percent Due in 2028 [Member] | Fixed to Floating Interest Rate Swap
Debt Instrument [Line Items]
Debt Instrument, Unamortized Discount	$ 0.0
Notes payable due 2040
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	5.20%
Deferred Finance Costs, Net	$ (3.0)
Long-term Debt	364.1	363.3
Debt Instrument, Unamortized Discount	(0.2)
Deferred (Gain) Loss on Discontinuation of Fair Value Hedge	32.7
Long-term debt fair value adjustment	0.0
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 2052 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	5.75%
Deferred Finance Costs, Net	$ (18.7)
Long-term Debt	731.3	731.0
Debt instrument, face amount	750.0
Notes 5 Point 75 Percent Due 2052 [Member] | Fixed-to-Floating Interest Rate Swaps Terminated
Debt Instrument [Line Items]
Deferred (Gain) Loss on Discontinuation of Fair Value Hedge	0.0
Long-term debt fair value adjustment	0.0
Notes 5 Point 75 Percent Due 2052 [Member] | Fixed to Floating Interest Rate Swap
Debt Instrument [Line Items]
Debt Instrument, Unamortized Discount	$ 0.0
Notes 5 Point 75 Percent due 2053 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	5.75%
Deferred Finance Costs, Net	$ (8.0)
Long-term Debt	396.7	396.6
Debt instrument, face amount	400.0
Notes 5 Point 75 Percent due 2053 [Member] | Fixed to Floating Interest Rate Swap
Debt Instrument [Line Items]
Debt Instrument, Unamortized Discount	0.0
Deferred (Gain) Loss on Discontinuation of Fair Value Hedge	4.7
Long-term debt fair value adjustment	0.0
Notes Payable, Other Payables [Member]
Debt Instrument [Line Items]
Deferred Finance Costs, Net	0.0
Long-term Debt	8.2	4.2
Debt instrument, face amount	8.2
Notes Payable, Other Payables [Member] | Fixed-to-Floating Interest Rate Swaps Terminated
Debt Instrument [Line Items]
Deferred (Gain) Loss on Discontinuation of Fair Value Hedge	0.0
Long-term debt fair value adjustment	0.0
Notes Payable, Other Payables [Member] | Fixed to Floating Interest Rate Swap
Debt Instrument [Line Items]
Debt Instrument, Unamortized Discount	0.0
Net Investment Hedging [Member]
Debt Instrument [Line Items]
Commercial paper borrowings outstanding	924.5
2017 Credit Agreement [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Current Borrowing Capacity		1,250.0
Line of Credit Facility, Maximum Borrowing Capacity				$ 1,250.0
New Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Current Borrowing Capacity	$ 1,750.0	$ 1,750.0
Maximum [Member] | Notes Payable, Other Payables [Member]
Debt Instrument [Line Items]
Stated interest rate	3.38%	3.38%