Postretirement Benefit Plans - Other Changes in Plan Assets and Net Periodic Postretirement Cost Recognized in Other Comprehensive Income (Loss) (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net periodic postretirement cost
Interest cost	$ 8.3	$ 9.5
Amortization of prior service cost	0	0	0
Effect of curtailment / Special termination benefit	(1.2)
U.S. Pension Plans [Member]
Net periodic postretirement cost
Service cost	4.9	4.8	5.6
Interest cost	12.1	12.9	13.4
Expected return on plan assets	(19.5)	(18.2)	(18.9)
Amortization of net actuarial loss (gain)	8.3	6.5	3.7
Amortization of prior service cost	0.8	0.9	1.2
Net periodic postretirement cost	6.6	6.9	5.0
Effect of curtailment / Special termination benefit	1.2	0	2.5
Total net periodic postretirement cost	7.8	6.9	7.5
Other changes in plan assets and benefit obligations recognized in other comprehensive loss
Net actuarial (gain) loss	(40.0)	19.8	51.6
Amortization of net actuarial (loss) gain	(8.3)	(6.5)	(3.7)
Amortization of prior service cost	(0.8)	(0.9)	(2.8)
Foreign currency translation	0	0	0
Total change recognized in other comprehensive loss	(49.1)	12.4	45.1
Total impact from net periodic postretirement cost and changes in other comprehensive loss	(41.3)	19.3	52.6
International Pension Plan [Member]
Net periodic postretirement cost
Service cost	1.7	1.0	0.9
Interest cost	2.5	2.5	2.5
Expected return on plan assets	(0.1)	(0.1)	(0.1)
Amortization of net actuarial loss (gain)	0.6	(0.2)	(0.1)
Net periodic postretirement cost	4.7	3.2	3.2
Effect of curtailment / Special termination benefit	0	0	0
Total net periodic postretirement cost	4.7	3.2	3.2
Other changes in plan assets and benefit obligations recognized in other comprehensive loss
Net actuarial (gain) loss	(1.8)	14.8	(1.1)
Amortization of net actuarial (loss) gain	(0.6)	0.2	0.1
Amortization of prior service cost	0	0	0
Foreign currency translation	0.5	0.4	0
Total change recognized in other comprehensive loss	(1.9)	15.4	(1.0)
Total impact from net periodic postretirement cost and changes in other comprehensive loss	2.8	18.6	2.2
Pension [Member]
Net periodic postretirement cost
Service cost	6.6	5.8	6.5
Interest cost	14.6	15.4	15.9
Expected return on plan assets	(19.6)	(18.3)	(19.0)
Amortization of net actuarial loss (gain)	8.9	6.3	3.6
Amortization of prior service cost	0.8	0.9	1.2
Net periodic postretirement cost	11.3	10.1	8.2
Effect of curtailment / Special termination benefit	1.2	0	2.5
Total net periodic postretirement cost	12.5	10.1	10.7
Other changes in plan assets and benefit obligations recognized in other comprehensive loss
Net actuarial (gain) loss	(41.8)	34.6	50.5
Amortization of net actuarial (loss) gain	(8.9)	(6.3)	(3.6)
Amortization of prior service cost	(0.8)	(0.9)	(2.8)
Foreign currency translation	0.5	0.4	0
Total change recognized in other comprehensive loss	(51.0)	27.8	44.1
Total impact from net periodic postretirement cost and changes in other comprehensive loss	(38.5)	37.9	54.8
Others Benefits [Member]
Net periodic postretirement cost
Service cost	2.9	2.5	1.8
Interest cost	8.3	9.5	9.5
Expected return on plan assets	(0.6)	(0.5)	(0.6)
Amortization of net actuarial loss (gain)	4.3	4.6	2.6
Amortization of prior service cost	(0.4)	(0.1)	(0.1)
Total net periodic postretirement cost	14.5	16.0	13.2
Other changes in plan assets and benefit obligations recognized in other comprehensive loss
Net actuarial (gain) loss	(31.1)	22.1	14.5
Prior service cost	(19.0)	(3.1)	0
Amortization of net actuarial (loss) gain	(4.3)	(4.6)	(2.6)
Amortization of prior service cost	0.4	0.1	0.1
Total change recognized in other comprehensive loss	(54.0)	14.5	12.0
Total impact from net periodic postretirement cost and changes in other comprehensive loss	$ (39.5)	$ 30.5	$ 25.2