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Employee Benefit Plans - Composition of Pension Plan Assets (Detail) - USD ($) $ in Millions | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | --- | ---
Foreign Pension Plans, Defined Benefit |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Pension plan assets | $ 371.5 | $ 372.0 | $ 414.8
United States Pension Plans of US Entity, Defined Benefit |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Pension plan assets | 13.6 | 13.9 | $ 15.5
Defined Benefit Pension Plans |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Pension plan assets | 385.2 | 385.9 |
Defined Benefit Pension Plans | Other Defined Benefit Pension Plans |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Pension plan assets | 11.7 | 11.2 |
Level 1 | Defined Benefit Pension Plans |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Pension plan assets | 141.0 | 135.8 |
Level 1 | Defined Benefit Pension Plans | Other Defined Benefit Pension Plans |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Pension plan assets | 3.5 | 3.5 |
Level 2 | Defined Benefit Pension Plans |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Pension plan assets | 13.7 | 13.9 |
Level 3 | Defined Benefit Pension Plans |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Pension plan assets | 230.5 | 236.2 |
Level 3 | Defined Benefit Pension Plans | Other Defined Benefit Pension Plans |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Pension plan assets | 8.2 | 7.7 |
Germany | Defined Benefit Pension Plans | Foreign Pension Plans, Defined Benefit |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Pension plan assets | 217.0 | 223.1 |
Germany | Level 3 | Defined Benefit Pension Plans | Foreign Pension Plans, Defined Benefit |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Pension plan assets | 217.0 | 223.1 |
Canada | Defined Benefit Pension Plans | Local Currency Equities Member | Foreign Pension Plans, Defined Benefit |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Pension plan assets | 14.8 | 9.6 |
Canada | Defined Benefit Pension Plans | Non Local Currency Equities | Foreign Pension Plans, Defined Benefit |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Pension plan assets | 19.7 | 23.3 |
Canada | Defined Benefit Pension Plans | Local Currency Fixed Income | Foreign Pension Plans, Defined Benefit |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Pension plan assets | 59.5 | 50.6 |
Canada | Defined Benefit Pension Plans | Global Mutual Fund | Foreign Pension Plans, Defined Benefit |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Pension plan assets |  | 6.8 |
Canada | Defined Benefit Pension Plans | Cash And Other | Foreign Pension Plans, Defined Benefit |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Pension plan assets | 0.4 | 0.5 |
Canada | Level 1 | Defined Benefit Pension Plans | Local Currency Equities Member | Foreign Pension Plans, Defined Benefit |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Pension plan assets | 14.8 | 9.6 |
Canada | Level 1 | Defined Benefit Pension Plans | Non Local Currency Equities | Foreign Pension Plans, Defined Benefit |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Pension plan assets | 19.7 | 23.3 |
Canada | Level 1 | Defined Benefit Pension Plans | Local Currency Fixed Income | Foreign Pension Plans, Defined Benefit |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Pension plan assets | 59.5 | 50.6 |
Canada | Level 1 | Defined Benefit Pension Plans | Global Mutual Fund | Foreign Pension Plans, Defined Benefit |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Pension plan assets |  | 6.8 |
Canada | Level 1 | Defined Benefit Pension Plans | Cash And Other | Foreign Pension Plans, Defined Benefit |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Pension plan assets | 0.4 | 0.5 |
Norway | Defined Benefit Pension Plans | Local Currency Equities Member | Foreign Pension Plans, Defined Benefit |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Pension plan assets | 1.6 | 2.0 |
Norway | Defined Benefit Pension Plans | Non Local Currency Equities | Foreign Pension Plans, Defined Benefit |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Pension plan assets | 4.1 | 3.6 |
Norway | Defined Benefit Pension Plans | Local Currency Fixed Income | Foreign Pension Plans, Defined Benefit |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Pension plan assets | 23.2 | 24.5 |
Norway | Defined Benefit Pension Plans | Cash And Other | Foreign Pension Plans, Defined Benefit |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Pension plan assets | 9.9 | 7.9 |
Norway | Defined Benefit Pension Plans | Non Local Currency Fixed Income | Foreign Pension Plans, Defined Benefit |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Pension plan assets | 5.4 | 4.7 |
Norway | Defined Benefit Pension Plans | Real Estate | Foreign Pension Plans, Defined Benefit |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Pension plan assets | 4.2 | 4.2 |
Norway | Level 1 | Defined Benefit Pension Plans | Local Currency Equities Member | Foreign Pension Plans, Defined Benefit |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Pension plan assets | 1.6 | 2.0 |
Norway | Level 1 | Defined Benefit Pension Plans | Non Local Currency Equities | Foreign Pension Plans, Defined Benefit |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Pension plan assets | 4.1 | 3.6 |
Norway | Level 1 | Defined Benefit Pension Plans | Local Currency Fixed Income | Foreign Pension Plans, Defined Benefit |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Pension plan assets | 23.2 | 24.5 |
Norway | Level 1 | Defined Benefit Pension Plans | Cash And Other | Foreign Pension Plans, Defined Benefit |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Pension plan assets | 8.8 | 6.7 |
Norway | Level 1 | Defined Benefit Pension Plans | Non Local Currency Fixed Income | Foreign Pension Plans, Defined Benefit |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Pension plan assets | 5.4 | 4.7 |
Norway | Level 3 | Defined Benefit Pension Plans | Cash And Other | Foreign Pension Plans, Defined Benefit |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Pension plan assets | 1.1 | 1.2 |
Norway | Level 3 | Defined Benefit Pension Plans | Real Estate | Foreign Pension Plans, Defined Benefit |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Pension plan assets | 4.2 | 4.2 |
United States | Defined Benefit Pension Plans | CMRT | United States Pension Plans of US Entity, Defined Benefit |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Pension plan assets | 13.7 | 13.9 |
United States | Level 2 | Defined Benefit Pension Plans | CMRT | United States Pension Plans of US Entity, Defined Benefit |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Pension plan assets | $ 13.7 | $ 13.9 |

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