Income Taxes - Components of Net Deferred Tax Assets Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Deferred tax assets:
Compensation and benefits	$ 32.8	$ 32.5
Defined benefit plans	84.4	83.9
Capitalized inventories	12.1	10.9
Accounts receivable	7.7	7.5
Other accrued expenses	23.7	17.2
Net operating loss and other tax carryforwards	39.9	15.8
Valuation allowance	(19.7)	(12.0)
Miscellaneous	6.1	3.7
Total deferred tax assets	187.0	159.5
Deferred tax liabilities:
LIFO inventories	(8.2)	(9.3)
Fixed assets	(48.5)	(60.6)
Identifiable intangible assets	(194.6)	(205.0)
Investment in partnership	(129.8)
Miscellaneous	(0.2)	(1.7)
Total deferred tax liabilities	(381.3)	(276.6)
Net deferred tax liability	(194.3)	(117.1)
Net deferred tax liability
Other current assets		33.8
Other current liabilities		(2.4)
Other assets	7.4	2.1
Deferred income taxes	(201.7)	(150.6)
Net deferred tax liability	$ (194.3)	$ (117.1)