Goodwill and Other Intangible Assets, Net - Schedule of Other Intangible Assets and Related Amortization Periods (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Jun. 30, 2018
Intangible Assets [Line Items]
Intangible assets, Gross Carrying Amount	$ 10,829.6	$ 10,725.4
Accumulated Amortization	(630.0)	(630.3)
Intangible assets, Net Book value	10,199.6	10,095.1
Trade Names [Member]
Intangible Assets [Line Items]
Indefinite life, Net Book Value	8,563.6	8,533.2
Trade Names [Member]
Intangible Assets [Line Items]
Gross Carrying Amount	190.7	171.4
Accumulated Amortization	(35.7)	(29.8)
Net Book Value	$ 155.0	141.6
Trade Names [Member] | Minimum [Member]
Intangible Assets [Line Items]
Amortization periods	2 years
Trade Names [Member] | Maximum [Member]
Intangible Assets [Line Items]
Amortization periods	15 years
Capitalized Software [Member]
Intangible Assets [Line Items]
Gross Carrying Amount	$ 485.8	503.3
Accumulated Amortization	(302.9)	(323.6)
Net Book Value	$ 182.9	179.7
Capitalized Software [Member] | Minimum [Member]
Intangible Assets [Line Items]
Amortization periods	3 years
Capitalized Software [Member] | Maximum [Member]
Intangible Assets [Line Items]
Amortization periods	12 years
Patents and Intellectual Property [Member]
Intangible Assets [Line Items]
Gross Carrying Amount	$ 152.0	136.6
Accumulated Amortization	(81.4)	(66.4)
Net Book Value	$ 70.6	70.2
Patents and Intellectual Property [Member] | Minimum [Member]
Intangible Assets [Line Items]
Amortization periods	3 years
Patents and Intellectual Property [Member] | Maximum [Member]
Intangible Assets [Line Items]
Amortization periods	14 years
Customer Relationships & Distributor Channels [Member]
Intangible Assets [Line Items]
Gross Carrying Amount	$ 1,324.7	1,271.9
Accumulated Amortization	(159.6)	(150.0)
Net Book Value	$ 1,165.1	1,121.9
Customer Relationships & Distributor Channels [Member] | Minimum [Member]
Intangible Assets [Line Items]
Amortization periods	3 years
Customer Relationships & Distributor Channels [Member] | Maximum [Member]
Intangible Assets [Line Items]
Amortization periods	30 years
Other [Member]
Intangible Assets [Line Items]
Gross Carrying Amount	$ 112.8	109.0
Accumulated Amortization	(50.4)	(60.5)
Net Book Value	$ 62.4	$ 48.5
Other [Member] | Minimum [Member]
Intangible Assets [Line Items]
Amortization periods	3 years
Other [Member] | Maximum [Member]
Intangible Assets [Line Items]
Amortization periods	5 years