Employee Benefit Plans - Schedule of Funded Status (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Amounts recognized in the Consolidated Balance Sheets:
Noncurrent	$ (249.4)	$ (169.3)
U.S. Defined Benefit Pension Plans
Change in benefit obligation:
Balance at beginning of the year	62.0	69.1
Interest cost	2.9	2.4	2.7
Actuarial loss (gain)	9.9	(5.6)
Benefits paid	(4.6)	(3.9)
Balance at end of the year	70.2	62.0	69.1
Change in plan assets:
Fair value at beginning of the year	54.9	50.7
Actual return on plan assets	2.0	7.0
Employer contributions	1.3	1.1
Benefits paid	(4.6)	(3.9)
Fair value at end of year	53.6	54.9	50.7
Funded status	(16.6)	(7.1)
Amounts recognized in the Consolidated Balance Sheets:
Current	(0.3)	(0.3)
Noncurrent	(16.3)	(6.8)
Total	(16.6)	(7.1)
Total amount recognized in balance sheet	22.9	21.8
Accumulated benefit obligations (“ABO”)	70.2	62.0
Accumulated other comprehensive loss:
Accumulated other comprehensive loss—Actuarial loss	39.5	28.9
Foreign Pension Plan Defined Benefit
Change in benefit obligation:
Balance at beginning of the year	604.9	591.5
Service cost	9.9	13.1	10.4
Interest cost	22.2	21.6	22.8
Participants’ contributions	2.0	1.9
Actuarial loss (gain)	122.2	(2.5)
Change in currency exchange rates	(75.3)	4.6
Benefits paid	(26.7)	(25.3)
Balance at end of the year	659.2	604.9	591.5
Change in plan assets:
Fair value at beginning of the year	441.6	409.9
Actual return on plan assets	40.7	28.5
Employer contributions	20.4	27.3
Participants’ contributions	2.0	1.9
Change in currency exchange rates	(52.5)	(0.7)
Benefits paid	(26.7)	(25.3)
Fair value at end of year	425.5	441.6	409.9
Funded status	(233.7)	(163.3)
Amounts recognized in the Consolidated Balance Sheets:
Pension asset		0.6
Current	(0.6)	(1.4)
Noncurrent	(233.1)	(162.5)
Total	(233.7)	(163.3)
Total amount recognized in balance sheet	20.8	0.3
Accumulated benefit obligations (“ABO”)	627.5	560.0
Accumulated other comprehensive loss:
Accumulated other comprehensive loss—Actuarial loss	252.3	160.8
Accumulated other comprehensive income (loss) - Prior service credit	2.2	2.8
Accumulated other comprehensive loss, Total	254.5	163.6
OPEB
Change in benefit obligation:
Balance at beginning of the year	15.1	22.7
Service cost	0.1	0.3	0.3
Interest cost	0.6	0.7	0.8
Actuarial loss (gain)	1.4	(2.2)
Plan amendment		(4.4)
Curtailment		(0.1)
Change in currency exchange rates	(0.6)	(0.8)
Benefits paid	(1.2)	(1.1)
Balance at end of the year	15.4	15.1	22.7
Change in plan assets:
Benefits paid	(1.2)	(1.1)
Funded status	(15.4)	(15.1)
Amounts recognized in the Consolidated Balance Sheets:
Current	(1.3)	(1.4)
Noncurrent	(14.1)	(13.7)
Total	(15.4)	(15.1)
Total amount recognized in balance sheet	(22.8)	(26.1)
Accumulated other comprehensive loss:
Accumulated other comprehensive loss—Actuarial loss	3.2	1.6
Accumulated other comprehensive income (loss) - Prior service credit	(10.6)	(12.6)
Accumulated other comprehensive loss, Total	$ (7.4)	$ (11.0)