Divestitures and Planned Divestitures - Schedule of Major Classes of Assets and Liabilities Held for Sale (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Discontinued Operations and Disposal Groups [Abstract]
Accounts receivable, net		$ 164.4
Inventories, net		311.6
Prepaid expenses and other		24.3
Property, plant and equipment, net	$ 4.0	224.9
Goodwill		762.5
Other intangible assets		244.5
Other assets		13.5
Total Assets Held for Sale	$ 4.0	1,745.7
Accounts payable		88.2
Accrued compensation		35.3
Other accrued liabilities		81.6
Short-term debt and current portion long-term debt		4.3
Other noncurrent liabilities		131.1
Total Liabilities Held for Sale		$ 340.5