Summary of Financial Instruments Carrying and Fair Values (Detail) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Mar. 01, 2032	Feb. 01, 2032	Dec. 30, 2017
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Document Period End Date	Jun. 30, 2018
Investments, Fair Value Disclosure	$ 7.8			$ 7.9
Long-term debt, including current maturities	3,810.1			3,805.7
Long-term Debt, Fair Value	3,925.6			3,991.0
Sensitivity Analysis of Fair Value, Contingent Consideration Liability, Impact of 10 Percent Adverse Change in Discount Rate				8.0
Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments, Fair Value Disclosure	7.6			7.6
Long-term debt, including current maturities	$ 3,810.1			$ 3,805.7
Scenario, Forecast [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Business Combination, Contingent Consideration Percent of Sales, Liability, Noncurrent		3.00%
Business Combination, Contingent Consideration, Liability, Noncurrent			$ 114.0
Scenario, Forecast [Member] | Minimum [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Business Combination, Contingent Consideration Percent of Sales, Liability, Noncurrent			2.50%
Scenario, Forecast [Member] | Maximum [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Business Combination, Contingent Consideration Percent of Sales, Liability, Noncurrent			3.50%