Divestitures and Held for Sale - Schedule of Major Classes of Assets and Liabilities Held for Sale (Detail) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Discontinued Operations and Disposal Groups [Abstract]
Accounts receivable, net	$ 648.0	$ 794.7
Inventories, net	620.3	836.4
Prepaid expenses and other	85.4	87.6
Property, plant and equipment, net	635.3	310.1
Goodwill	1,700.0	2,189.6
Other intangible assets, net	2,892.5	2,652.1
Other assets	30.9	23.8
Current assets held-for-sale	6,612.4	6,894.3
Property, plant and equipment, net		429.0
Goodwill		1,497.5
Other intangible assets, net		1,384.3
Other assets		10.9
Noncurrent assets held-for-sale		3,321.7
Accounts payable	421.5	534.8
Accrued compensation	79.0	101.6
Other accrued liabilities	265.5	433.0
Deferred income taxes	372.3	570.1
Other liabilities	74.4	71.8
Current liabilities held-for-sale	1,212.7	1,711.3
Deferred income taxes	$ 0.0	0.0
Other liabilities		12.8
Noncurrent liabilities held-for-sale		$ 12.8