Employee Benefit Plans - Schedule of Funded Status (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Amounts recognized in the Consolidated Balance Sheets:
Pension asset	$ 1.6	$ 1.7
Noncurrent	(240.2)	(216.8)
U.S. Defined Benefit Pension Plans
Change in benefit obligation:
Balance at beginning of the year	66.6	70.2
Interest cost	2.7	2.7	$ 2.9
Actuarial loss (gain)	(2.3)	(2.2)
Benefits paid	(4.2)	(4.1)
Balance at end of the year	62.8	66.6	70.2
Change in plan assets:
Fair value at beginning of the year	47.6	53.6
Actual return on plan assets	2.1	(2.3)
Employer contributions	0.1	0.4
Benefits paid	(4.2)	(4.1)
Fair value at end of year	45.6	47.6	53.6
Funded status	(17.2)	(19.0)
Amounts recognized in the Consolidated Balance Sheets:
Current	(0.2)	(0.3)
Noncurrent	(17.0)	(18.7)
Total recognized in balance sheet	(17.2)	(19.0)
Accumulated other comprehensive income (loss):
Accumulated other comprehensive loss—Actuarial loss	39.3	42.0
Total amount recognized in balance sheet and AOCI	22.1	23.0
Accumulated benefit obligations (“ABO”)	62.8	66.6
Foreign Pension Plan Defined Benefit
Change in benefit obligation:
Balance at beginning of the year	578.9	659.2
Service cost	9.9	11.2	9.9
Interest cost	15.1	15.1	22.2
Participants’ contributions	1.5	1.6
Actuarial loss (gain)	35.6	(10.0)
Change in currency exchange rates	(16.8)	(76.9)
Benefits paid	(20.8)	(21.3)
Balance at end of the year	603.4	578.9	659.2
Change in plan assets:
Fair value at beginning of the year	382.5	425.5
Actual return on plan assets	12.2	10.8
Employer contributions	15.3	17.6
Participants’ contributions	1.5	1.6
Change in currency exchange rates	(8.9)	(51.7)
Benefits paid	(20.8)	(21.3)
Fair value at end of year	381.8	382.5	425.5
Funded status	(221.6)	(196.4)
Amounts recognized in the Consolidated Balance Sheets:
Pension asset	1.6	1.7
Noncurrent	(223.2)	(198.1)
Total recognized in balance sheet	(221.6)	(196.4)
Accumulated other comprehensive income (loss):
Accumulated other comprehensive loss—Actuarial loss	261.2	234.1
Accumulated other comprehensive income (loss) - Prior service credit	1.7	1.9
Accumulated other comprehensive loss, Total	262.9	236.0
Total amount recognized in balance sheet and AOCI	41.3	39.6
Accumulated benefit obligations (“ABO”)	578.8	554.4
OPEB
Change in benefit obligation:
Balance at beginning of the year	12.9	15.4
Service cost	0.1	0.1	0.1
Interest cost	0.5	0.5	0.6
Actuarial loss (gain)	(0.5)	(0.8)
Change in currency exchange rates	0.2	(1.2)
Benefits paid	(1.0)	(1.1)
Balance at end of the year	12.2	12.9	$ 15.4
Change in plan assets:
Benefits paid	(1.0)	(1.1)
Funded status	(12.2)	(12.9)
Amounts recognized in the Consolidated Balance Sheets:
Current	(1.1)	(1.1)
Noncurrent	(11.1)	(11.8)
Total recognized in balance sheet	(12.2)	(12.9)
Accumulated other comprehensive income (loss):
Accumulated other comprehensive loss—Actuarial loss	1.9	2.4
Accumulated other comprehensive income (loss) - Prior service credit	(6.8)	(8.6)
Accumulated other comprehensive loss, Total	(4.9)	(6.2)
Total amount recognized in balance sheet and AOCI	$ (17.1)	$ (19.1)