Long-Term Debt and Financing Arrangements (Detail) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Apr. 01, 2017	Jun. 29, 2019	Jun. 30, 2018	Mar. 01, 2019	Feb. 15, 2019	Dec. 29, 2018	Sep. 29, 2018
Debt Instrument [Line Items]
Liabilities, Fair Value Adjustment				$ 9.6
Document Period End Date				Jun. 29, 2019
Debt Issuance Costs, Net	$ 36.7			$ 36.7
Long-term Debt	3,912.2			3,912.2				$ 3,822.3
Short-term Debt, Maximum Amount Outstanding During Period			$ 3,000.0
Commercial Paper	1,454.2			1,454.2				373.0
Proceeds from Issuance of Long-term Debt	0.7	$ 0.0		496.2	$ 0.0
Proceeds from (Repayments of) Long-term Debt and Capital Securities	0.0	0.0		400.0	0.0
Debt instrument, face amount	3,954.3			3,954.3
Less: Current maturities of long-term debt	(3.1)			(3.1)				$ (2.5)
Debt Instrument, Unamortized Discount	2.0			2.0
Notes 3 Point 4 Percent Due in 2021 [Member]
Debt Instrument [Line Items]
Debt Issuance Costs, Net	$ 0.8			$ 0.8
Stated interest rate	3.40%			3.40%
Long-term debt, interest rate								3.40%
Notes 2 Point 25 Percent due 2018 [Member]
Debt Instrument [Line Items]
Stated interest rate								2.90%
Notes 3 Point 4 Percent Due in 2021 [Member] [Member]
Debt Instrument [Line Items]
Debt Issuance Costs, Net	$ 3.1			$ 3.1
Long-term Debt	$ 496.2			$ 496.2				$ 0.0
Stated interest rate	3.40%			3.40%
Long-term debt, interest rate								3.40%
Notes Payable due 2022 [Member]
Debt Instrument [Line Items]
Debt instrument, face amount	$ 754.3			$ 754.3
Debt Instrument, Unamortized Discount	0.2			0.2
Notes payable due 2028
Debt Instrument [Line Items]
Debt Issuance Costs, Net	0.0			0.0
Long-term Debt	$ 169.4			$ 169.4				$ 170.4
Stated interest rate	7.05%			7.05%
Long-term debt, interest rate								7.05%
Notes 4 Point 25 Percent Due 2028 [Member]
Debt Instrument [Line Items]
Debt Issuance Costs, Net	$ 4.2			$ 4.2
Long-term Debt	$ 495.5			$ 495.5				$ 495.7
Stated interest rate	4.25%			4.25%
Long-term debt, interest rate								4.25%
Notes payable due 2040
Debt Instrument [Line Items]
Liabilities, Fair Value Adjustment				$ 0.0
Debt Issuance Costs, Net	$ 2.9			2.9
Long-term Debt	$ 365.7			$ 365.7				$ 364.9
Stated interest rate	5.20%			5.20%
Long-term debt, interest rate								5.20%
Debt Instrument, Unamortized Discount	$ 0.2			$ 0.2
Notes 4 Point 85 Percent Due 2048 [Member] [Member]
Debt Instrument [Line Items]
Liabilities, Fair Value Adjustment				0.0
Debt Issuance Costs, Net	5.5			5.5
Long-term Debt	$ 494.0			$ 494.0				$ 494.4
Stated interest rate	4.85%			4.85%
Long-term debt, interest rate								4.85%
Debt Instrument, Unamortized Discount	$ 0.5			$ 0.5
Notes 5 Point 75 Percent due 2053 [Member]
Debt Instrument [Line Items]
Long-term debt, interest rate								5.75%
Notes 7 Point 08 Percent due 2053 [Member] [Member]
Debt Instrument [Line Items]
Debt Issuance Costs, Net	0.0			0.0
Long-term Debt	$ 0.0			$ 0.0				$ 396.7
Stated interest rate	7.08%			7.08%
Proceeds from (Repayments of) Long-term Debt and Capital Securities				$ 405.7
Gain (Loss) on Extinguishment of Debt				3.2
Debt instrument, face amount	$ 0.0			0.0
Long-term debt, interest rate								7.08%
Write off of Deferred Debt Issuance Cost				7.8
Other, payable in varying amounts through 2021
Debt Instrument [Line Items]
Debt Issuance Costs, Net	0.0			0.0
Long-term Debt	0.0			0.0				$ 7.9
Debt instrument, face amount	$ 0.0			$ 0.0
Other, payable in varying amounts through 2021 | Minimum [Member]
Debt Instrument [Line Items]
Stated interest rate	0.00%			0.00%				0.00%
Other, payable in varying amounts through 2021 | Maximum [Member]
Debt Instrument [Line Items]
Stated interest rate	4.50%			4.50%				4.50%
5 Year Credit Facility [Member] [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Current Borrowing Capacity									$ 2,000.0
Committed Credit Facility [Member]
Debt Instrument [Line Items]
Amount of Credit Facility Foreign Currency Sublimit									653.3
2018 Credit Agreement [Member] [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Current Borrowing Capacity									$ 1,000.0
Net Investment Hedging [Member]
Debt Instrument [Line Items]
Commercial paper borrowings outstanding								$ 228.9
Commercial Paper	$ 909.5			$ 909.5
Fixed-to-Floating Interest Rate Swaps Terminated | Notes 3 Point 4 Percent Due in 2021 [Member]
Debt Instrument [Line Items]
Liabilities, Fair Value Adjustment				0.0
Fixed-to-Floating Interest Rate Swaps Terminated | Other, payable in varying amounts through 2021
Debt Instrument [Line Items]
Liabilities, Fair Value Adjustment				0.0
Fixed to Floating Interest Rate Swap | Notes 3 Point 4 Percent Due in 2021 [Member]
Debt Instrument [Line Items]
Debt instrument, face amount	400.0			400.0
Debt Instrument, Unamortized Discount	0.1			0.1
Fixed to Floating Interest Rate Swap | Notes 3 Point 4 Percent Due in 2021 [Member] [Member]
Debt Instrument [Line Items]
Liabilities, Fair Value Adjustment				0.0
Proceeds from Issuance of Long-term Debt				496.2
Debt instrument, face amount	500.0			500.0
Debt Instrument, Unamortized Discount	0.7			0.7
Fixed to Floating Interest Rate Swap | Notes payable due 2028
Debt Instrument [Line Items]
Liabilities, Fair Value Adjustment				9.6
Debt instrument, face amount	150.0			150.0
Fixed to Floating Interest Rate Swap | Notes 4 Point 25 Percent Due 2028 [Member]
Debt Instrument [Line Items]
Liabilities, Fair Value Adjustment				0.0
Debt instrument, face amount	500.0			500.0
Debt Instrument, Unamortized Discount	0.3			0.3
Fixed to Floating Interest Rate Swap | Notes payable due 2040
Debt Instrument [Line Items]
Debt instrument, face amount	400.0			400.0
Fixed to Floating Interest Rate Swap | Notes 4 Point 85 Percent Due 2048 [Member] [Member]
Debt Instrument [Line Items]
Debt instrument, face amount	500.0			500.0
Fixed to Floating Interest Rate Swap | Notes 7 Point 08 Percent due 2053 [Member] [Member]
Debt Instrument [Line Items]
Liabilities, Fair Value Adjustment				0.0
Debt Instrument, Unamortized Discount	0.0			0.0
Fixed to Floating Interest Rate Swap | Other, payable in varying amounts through 2021
Debt Instrument [Line Items]
Debt Instrument, Unamortized Discount	0.0			0.0
Cash Flow Hedges
Debt Instrument [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	1.1	$ 7.1		3.2	11.7
Cash Flow Hedges | Notes 7 Point 08 Percent due 2053 [Member] [Member]
Debt Instrument [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net				4.6	$ 4.6
Cash Flow Hedges | Interest Rate Swap [Member]
Debt Instrument [Line Items]
Derivative, Notional Amount	$ 400.0			400.0		$ 250.0	$ 650.0
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net				$ 1.0