Employee Benefit Plans - Composition of Pension Plan Assets (Detail) (Defined Benefit Pension Plans, USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Plan assets	$ 496.6	$ 460.6
Other Pension Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Plan assets	22.0	19.5
Germany
Defined Benefit Plan Disclosure [Line Items]
Plan assets	247.5	224.8
Canada | Local Currency Equities
Defined Benefit Plan Disclosure [Line Items]
Plan assets	24.0	22.4
Canada | Foreign Equities
Defined Benefit Plan Disclosure [Line Items]
Plan assets	33.0	30.3
Canada | Local Currency Fixed Income
Defined Benefit Plan Disclosure [Line Items]
Plan assets	44.7	38.0
Canada | Global Mutual Fund
Defined Benefit Plan Disclosure [Line Items]
Plan assets	6.1	5.6
Canada | Cash and Other
Defined Benefit Plan Disclosure [Line Items]
Plan assets	0.5	2.1
Norway | Local Currency Equities
Defined Benefit Plan Disclosure [Line Items]
Plan assets	2.0	3.2
Norway | Foreign Equities
Defined Benefit Plan Disclosure [Line Items]
Plan assets	5.2	5.2
Norway | Local Currency Fixed Income
Defined Benefit Plan Disclosure [Line Items]
Plan assets	35.0	40.9
Norway | Cash and Other
Defined Benefit Plan Disclosure [Line Items]
Plan assets	13.2	7.6
Norway | Foreign Fixed Income
Defined Benefit Plan Disclosure [Line Items]
Plan assets	3.6	4.8
Norway | Real estate
Defined Benefit Plan Disclosure [Line Items]
Plan assets	4.8	5.5
United States | CMRT
Defined Benefit Plan Disclosure [Line Items]
Plan assets	55.0	50.7
Level 1
Defined Benefit Plan Disclosure [Line Items]
Plan assets	180.1	171.8
Level 1 | Other Pension Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Plan assets	13.6	12.3
Level 1 | Canada | Local Currency Equities
Defined Benefit Plan Disclosure [Line Items]
Plan assets	24.0	22.4
Level 1 | Canada | Foreign Equities
Defined Benefit Plan Disclosure [Line Items]
Plan assets	33.0	30.3
Level 1 | Canada | Local Currency Fixed Income
Defined Benefit Plan Disclosure [Line Items]
Plan assets	44.7	38.0
Level 1 | Canada | Global Mutual Fund
Defined Benefit Plan Disclosure [Line Items]
Plan assets	6.1	5.6
Level 1 | Canada | Cash and Other
Defined Benefit Plan Disclosure [Line Items]
Plan assets	0.5	2.1
Level 1 | Norway | Local Currency Equities
Defined Benefit Plan Disclosure [Line Items]
Plan assets	2.0	3.2
Level 1 | Norway | Foreign Equities
Defined Benefit Plan Disclosure [Line Items]
Plan assets	5.2	5.2
Level 1 | Norway | Local Currency Fixed Income
Defined Benefit Plan Disclosure [Line Items]
Plan assets	35.0	40.9
Level 1 | Norway | Cash and Other
Defined Benefit Plan Disclosure [Line Items]
Plan assets	12.4	7.0
Level 1 | Norway | Foreign Fixed Income
Defined Benefit Plan Disclosure [Line Items]
Plan assets	3.6	4.8
Level 2
Defined Benefit Plan Disclosure [Line Items]
Plan assets	55.0	50.7
Level 2 | United States | CMRT
Defined Benefit Plan Disclosure [Line Items]
Plan assets	55.0	50.7
Level 3 Inputs
Defined Benefit Plan Disclosure [Line Items]
Plan assets	261.5	238.1	200.6
Level 3 Inputs | Other Pension Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Plan assets	8.4	7.2
Level 3 Inputs | Germany
Defined Benefit Plan Disclosure [Line Items]
Plan assets	247.5	224.8
Level 3 Inputs | Norway | Cash and Other
Defined Benefit Plan Disclosure [Line Items]
Plan assets	0.8	0.6
Level 3 Inputs | Norway | Real estate
Defined Benefit Plan Disclosure [Line Items]
Plan assets	$ 4.8	$ 5.5