Benefit Plans - Reconciliations of Benefit Obligations, Fair Value of Plan Assets and Funded Status of Pension Plans and Other Post-Retirement Plans (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Change in benefit obligations
Service cost		$ 0.2
Change in plan assets
Fair value of plan assets end of year	572.3	575.2
U.S. Pension Plans
Change in benefit obligations
Benefit obligation beginning of year	394.3	572.1
Service cost	15.6	12.9	10.3
Interest cost	14.3	28.2	28.6
Amendments	0	0.4
Benefit obligations assumed in Merger	0	10.8
Actuarial loss	(56.9)	128.8
Translation (gain) loss	0	0
Benefits paid	(20.4)	(358.9)
Benefit obligation end of year	346.9	394.3	572.1
Change in plan assets
Fair value of plan assets beginning of year	326.2	408.8
Actual return on plan assets	(28.9)	43.9
Plan assets acquired in Merger	0	7.6
Company contributions	8.9	224.8
Translation gain (loss)	0	0
Benefits paid	(20.4)	(358.9)
Fair value of plan assets end of year	285.8	326.2	408.8
Funded status
Plan assets less than benefit obligation	(61.1)	(68.1)
Non-US Pension Plans
Change in benefit obligations
Benefit obligation beginning of year	460.8	89.5
Service cost	8.4	3.3	2.2
Interest cost	17.9	7.5	4.1
Amendments	0	0
Benefit obligations assumed in Merger	0	338.6
Actuarial loss	(16.6)	26.6
Translation (gain) loss	9.7	1.5
Benefits paid	(18.2)	(6.2)
Benefit obligation end of year	462.0	460.8	89.5
Change in plan assets
Fair value of plan assets beginning of year	249.0	10.9
Actual return on plan assets	28.6	6.4
Plan assets acquired in Merger	0	227.3
Company contributions	21.9	10.4
Translation gain (loss)	5.2	0.2
Benefits paid	(18.2)	(6.2)
Fair value of plan assets end of year	286.5	249.0	10.9
Funded status
Plan assets less than benefit obligation	(175.5)	(211.9)
Post-retirement
Change in benefit obligations
Benefit obligation beginning of year	59.3	35.1
Service cost	0.3	0.2	0.2
Interest cost	1.9	1.9	1.9
Amendments	0	0
Benefit obligations assumed in Merger	0	16.7
Actuarial loss	(15.9)	8.2
Translation (gain) loss	0	0
Benefits paid	(3.2)	(2.8)
Benefit obligation end of year	42.4	59.3	35.1
Change in plan assets
Fair value of plan assets beginning of year	0	0
Actual return on plan assets	0	0
Plan assets acquired in Merger	0	0
Company contributions	3.2	2.8
Translation gain (loss)	0	0
Benefits paid	(3.2)	(2.8)
Fair value of plan assets end of year	0	0	0
Funded status
Plan assets less than benefit obligation	$ (42.4)	$ (59.3)