Divestitures and Held for Sale - Schedule of Major Classes of Assets and Liabilities Held for Sale (Detail) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Discontinued Operations and Disposal Groups [Abstract]
Accounts receivable, net	$ 411.7	$ 794.7
Inventories, net	338.7	836.4
Prepaid expenses and other	40.4	87.6
Property, plant and equipment, net	515.9	291.9
Goodwill	954.4	1,966.3
Other intangible assets, net	1,270.8	2,364.1
Other assets	9.4	29.4
Current assets held for sale	3,541.3	6,370.4
Property, plant and equipment, net		447.2
Goodwill		1,720.8
Other intangible assets, net		1,672.3
Other assets		1.9
Noncurrent assets held for sale		3,842.2
Accounts payable	256.7	534.8
Accrued compensation	57.0	101.6
Other accrued liabilities	152.9	434.0
Deferred income taxes	170.3	526.0
Other liabilities	13.5	64.9
Current liabilities held for sale	$ 650.4	1,661.3
Deferred income taxes		228.3
Other liabilities		14.2
Noncurrent liabilities held for sale		$ 242.5