Intangible Assets, Net - Summary of Intangible Assets (Detail) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Intangibles And Other Assets Net [Line Items]
Intangible assets - Cost	$ 631.3	$ 580.1
Total intangible assets - Cost	918.9	861.7
Intangible assets - Cost	287.6	281.6
Intangible assets - Accumulated Amortization	155.0	102.7
Intangible assets- Net	476.3	477.4
Total intangible assets - Net	763.9	759.0
Intangible assets- Net	287.6	281.6
Customer Relationships [Member]
Intangibles And Other Assets Net [Line Items]
Intangible assets - Cost	580.8	552.3
Intangible assets - Accumulated Amortization	138.9	94.3
Intangible assets- Net	441.9	458.0
Patents [Member]
Intangibles And Other Assets Net [Line Items]
Intangible assets - Cost	15.2
Intangible assets - Accumulated Amortization	0.6
Intangible assets- Net	14.6
Trademarks [Member]
Intangibles And Other Assets Net [Line Items]
Intangible assets - Cost	1.2	1.1
Intangible assets - Accumulated Amortization	0.2	0.1
Intangible assets- Net	1.0	1.0
Information Technology [Member]
Intangibles And Other Assets Net [Line Items]
Intangible assets - Cost	27.4	20.5
Intangible assets - Accumulated Amortization	11.8	6.3
Intangible assets- Net	15.6	14.2
Other [Member]
Intangibles And Other Assets Net [Line Items]
Intangible assets - Cost	6.7	6.2
Intangible assets - Accumulated Amortization	3.5	2.0
Intangible assets- Net	3.2	4.2
Rights [Member]
Intangibles And Other Assets Net [Line Items]
Intangible assets - Cost	24.5	24.5
Intangible assets- Net	24.5	24.5
Trademarks [Member]
Intangibles And Other Assets Net [Line Items]
Intangible assets - Cost	263.1	257.1
Intangible assets- Net	$ 263.1	$ 257.1