Other accrued liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Other Liabilities Disclosure [Abstract]
Payrolls and commissions	$ 110.6	$ 102.7
Accrued vacations	47.1	51.1
Income taxes	35.3	22.6
Taxes other than income taxes	25.4	32.7
Cost reduction (work-force reductions)	21.2	33.0
Postretirement	19.3	20.7
Accrued interest	6.1	4.9
Other	84.2	62.2
Total other accrued liabilities	$ 349.2	$ 329.9	[1]

[1] Changed to conform to the current-year presentation. See Note 5.