Divestitures and Held for Sale - Schedule of Major Classes of Assets and Liabilities Held for Sale (Detail) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Discontinued Operations and Disposal Groups [Abstract]
Accounts receivable, net	$ 247.8
Inventories, net	235.6
Prepaid expenses and other	17.3
Property, plant and equipment, net	165.2	$ 4.0
Goodwill	911.4
Other intangible assets, net	1,066.4
Other assets	10.4
Total Assets	2,654.1	$ 4.0
Accounts payable	101.1
Accrued compensation	13.1
Other accrued liabilities	81.6
Short-term debt and current portion long-term debt	0.3
Other noncurrent liabilities	13.2
Total Liabilities	$ 209.3