Divestitures and Held for Sale - Schedule of Major Classes of Assets and Liabilities Held for Sale (Detail) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Discontinued Operations and Disposal Groups [Abstract]
Accounts receivable, net	$ 0.0	$ 98.9
Inventories	0.0	161.1
Prepaid expenses and other current assets	0.0	23.6
Property, plant and equipment, net	0.0	215.4
Goodwill	0.0	38.7
Other intangible assets, net	0.0	699.8
Other assets	0.0	6.3
Current assets held for sale	0.0	1,243.8
Accounts payable	0.0	84.6
Accrued compensation	0.0	23.2
Other accrued liabilities	0.0	27.1
Deferred income taxes	0.0	152.7
Other liabilities	0.0	4.8
Current liabilities held for sale	$ 0.0	$ 292.4