Goodwill and Other Intangible Assets, Net - Schedule of Other Intangible Assets and Related Amortization Periods (Detail) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Intangible Assets [Line Items]
Indefinite life, Net Book Value		$ 4,093.1
Gross Carrying Amount	5,516.7	6,365.7
Accumulated Amortization	(914.4)	(778.3)
Net Book Value	4,602.3	5,587.4
Trade Names
Intangible Assets [Line Items]
Indefinite life, Net Book Value	3,239.5	4,093.1
Trade Names
Intangible Assets [Line Items]
Gross Carrying Amount	167.0	170.6
Accumulated Amortization	(45.6)	(36.5)
Net Book Value	$ 121.4	$ 134.1
Trade Names | Minimum
Intangible Assets [Line Items]
Amortization periods		2 years
Trade Names | Maximum
Intangible Assets [Line Items]
Amortization periods	2 years	15 years
Capitalized software
Intangible Assets [Line Items]
Gross Carrying Amount	$ 570.9	$ 552.1
Accumulated Amortization	(417.6)	(373.1)
Net Book Value	$ 153.3	$ 179.0
Capitalized software | Minimum
Intangible Assets [Line Items]
Amortization periods		3 years
Capitalized software | Maximum
Intangible Assets [Line Items]
Amortization periods	3 years	12 years
Patents and intellectual property
Intangible Assets [Line Items]
Gross Carrying Amount	$ 135.1	$ 137.6
Accumulated Amortization	(95.5)	(79.8)
Net Book Value	$ 39.6	$ 57.8
Patents and intellectual property | Minimum
Intangible Assets [Line Items]
Amortization periods		3 years
Patents and intellectual property | Maximum
Intangible Assets [Line Items]
Amortization periods	3 years	14 years
Customer relationships and distributor channels
Intangible Assets [Line Items]
Gross Carrying Amount	$ 1,295.2	$ 1,303.3
Accumulated Amortization	(260.6)	(214.6)
Net Book Value	$ 1,034.6	$ 1,088.7
Customer relationships and distributor channels | Minimum
Intangible Assets [Line Items]
Amortization periods		3 years
Customer relationships and distributor channels | Maximum
Intangible Assets [Line Items]
Amortization periods	3 years	30 years
Other
Intangible Assets [Line Items]
Gross Carrying Amount	$ 109.0	$ 109.0
Accumulated Amortization	(95.1)	(74.3)
Net Book Value	$ 13.9	$ 34.7
Other | Minimum
Intangible Assets [Line Items]
Amortization periods		3 years
Other | Maximum
Intangible Assets [Line Items]
Amortization periods	3 years	5 years