Acquisitions - Allocation of Purchase Price to Fair Value of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Millions	Apr. 01, 2017	Dec. 31, 2016	Aug. 11, 2016
Business Acquisition [Line Items]
Goodwill	$ 1,184.3	$ 1,175.4
S&D Acquisition [Member]
Business Acquisition [Line Items]
Cash	1.7	1.7
Accounts receivable	51.4	51.4
Inventories	62.5	62.5
Prepaid expenses and other assets	2.3	2.3
Property, plant & equipment	92.2	92.9
Goodwill	117.8	117.1
Intangible assets	119.0	119.0
Other assets	2.2	2.2
Accounts payable and accrued liabilities	(46.9)	(46.7)
Deferred tax liabilities	(43.1)	(43.3)
Other long-term liabilities	(5.5)	(5.5)
Total	353.6	353.6	$ 353.6
Eden Acquisition [Member]
Business Acquisition [Line Items]
Cash	19.6	19.6
Accounts receivable	95.4	95.4
Inventories	17.7	17.7
Prepaid expenses and other assets	6.2	6.2
Property, plant & equipment	107.1	107.1
Goodwill	300.5	299.7
Intangible assets	213.2	213.2
Other assets	2.8	2.8
Deferred tax assets	19.5	19.5
Current maturities of long-term debt	(2.7)	(2.7)
Accounts payable and accrued liabilities	(128.3)	(128.3)
Long-term debt	(3.1)	(3.1)
Deferred tax liabilities	(48.5)	(49.5)
Other long-term liabilities	(23.1)	(21.3)
Total	576.3	$ 576.3
Scenario, Adjustment [Member] | S&D Acquisition [Member]
Business Acquisition [Line Items]
Property, plant & equipment	(0.7)
Goodwill	0.7
Accounts payable and accrued liabilities	(0.2)
Deferred tax liabilities	0.2
Scenario, Adjustment [Member] | Eden Acquisition [Member]
Business Acquisition [Line Items]
Goodwill	0.8
Deferred tax liabilities	1.0
Other long-term liabilities	$ (1.8)