Long-Term Debt and Financing Arrangements - Additional Information (Detail) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Apr. 01, 2017	Jan. 01, 2017	Dec. 31, 2016	Jan. 03, 2015
Debt Instrument [Line Items]
Commercial Paper Current Borrowing Capacity		$ 2,000.0
Deferred Finance Costs, Net	$ (38.0)
Long-term Debt	$ 3,826.7			$ 3,823.1
Document Period End Date	Sep. 30, 2017
Debt instrument, face amount	$ 3,856.9
Debt Instrument, Unamortized Discount	(0.7)
Deferred (Gain) Loss on Discontinuation of Fair Value Hedge	(2.9)
Long-term debt fair value adjustment	11.4
Commercial paper borrowings outstanding	573.1			0.0
Commercial paper borrowings capacity	3,000.0	$ 3,000.0
Long-term Debt, Current Maturities	(8.7)			(7.8)
Long-term Debt, Excluding Current Maturities	$ 3,818.0			$ 3,815.3
sub-limit on revolving credit facility			$ 400.0
Notes 2 Point 45 Percent due 2018 [Member] [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	2.45%			2.45%
Deferred Finance Costs, Net	$ (2.0)
Long-term Debt	630.5			$ 629.2
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 2 Point 25 Percent due 2018 [Member]
Debt Instrument [Line Items]
Deferred Finance Costs, Net	(1.1)
Long-term Debt	343.9			$ 343.1
Debt instrument, face amount	$ 345.0
Stated interest rate	1.62%			2.25%
Notes 2 Point 25 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 2 Point 25 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	412.9			$ 415.2
Notes 3 Point 4 Percent Due in 2021 [Member]
Debt Instrument [Line Items]
Deferred Finance Costs, Net	$ (1.4)
Stated interest rate	3.40%
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	$ 14.5
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	(0.2)
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	(3.2)
Long-term Debt	$ 750.8			$ 750.3
Stated interest rate	2.90%
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	$ 173.1			$ 174.7
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
Deferred (Gain) Loss on Discontinuation of Fair Value Hedge	11.7
Long-term debt fair value adjustment	11.4
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	(3.1)
Long-term Debt	362.9			$ 361.7
Debt Instrument, Unamortized Discount	(0.2)
Deferred (Gain) Loss on Discontinuation of Fair Value Hedge	33.8
Long-term debt fair value adjustment	$ 0.0
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 2052 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage				5.75%
Deferred Finance Costs, Net	(19.1)
Long-term Debt	730.9			$ 730.4
Debt instrument, face amount	$ 750.0
Stated interest rate	5.75%
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	(8.1)
Long-term Debt	396.6			$ 396.5
Debt instrument, face amount	$ 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]
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	25.1			$ 22.0
Debt instrument, face amount	25.1
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	471.3
2017 Credit Agreement [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			$ 1,300.0
New Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Current Borrowing Capacity	$ 1,750.0
Maximum [Member] | Notes Payable, Other Payables [Member]
Debt Instrument [Line Items]
Stated interest rate	2.4275%			2.43%