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Defined Contribution and Defined Benefit Retirement - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined contribution plan expense | $ 7.8 | $ 6.6 | $ 6.5
Defined Benefit Pension Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined benefit fair value of plan assets | 533.9 | 548.2 |
Expected contribution | 19.0 |  |
Expect to recognize unrecognized actuarial gains (losses) | 16.1 |  |
Expect to recognize prior service credit\cost | 0.1 |  |
Defined Benefit Pension Plans | Significant Unobservable Inputs (Level 3) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined benefit fair value of plan assets | 320.5 | 314.8 | 283.5
Defined Benefit Pension Plans | Non U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined benefit plan benefit obligation | 758.1 | 855.8 | 746.4
Defined benefit fair value of plan assets | 481.5 | 494.8 | $ 450.0
Net underfunded status | $ 276.6 | $ 361.0 |
Discount rate | 1.50% | 1.00% |
Long-term return on plan assets | 2.40% | 2.00% | 2.90%
Defined Benefit Pension Plans | U.K. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined benefit plan benefit obligation | $ 13.5 |  |
Defined benefit fair value of plan assets | 15.3 |  |
Defined benefit pension plan assets | $ 1.8 |  |
Defined Benefit Pension Plans | Canada | Equity Securities | Minimum [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Percentage of plan asset allocation | 20.00% |  |
Defined Benefit Pension Plans | Canada | Fixed Income Funds | Minimum [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Percentage of plan asset allocation | 80.00% |  |
Defined Benefit Pension Plans | Norway | Significant Unobservable Inputs (Level 3) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Percentage of plan asset allocation |  | 17.00% |
Defined Benefit Pension Plans | Norway | Equity Securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Long-term return on plan assets | 5.00% |  |
Percentage of plan asset allocation | 15.00% |  |
Defined Benefit Pension Plans | Norway | Fixed Income Funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Long-term return on plan assets | 2.00% |  |
Percentage of plan asset allocation | 62.00% |  |
Defined Benefit Pension Plans | Norway | Real Estate. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined benefit fair value of plan assets | $ 9.1 | $ 7.1 |
Long-term return on plan assets | 4.00% |  |
Percentage of plan asset allocation | 14.00% |  |
Defined Benefit Pension Plans | Norway | Real Estate. | Significant Unobservable Inputs (Level 3) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined benefit fair value of plan assets | $ 9.1 | 7.1 |
Defined Benefit Pension Plans | Norway | Other Investments And Liquid Funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Long-term return on plan assets | 7.00% |  |
Defined Benefit Pension Plans | U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined benefit plan benefit obligation | $ 58.0 | 63.2 | $ 60.6
Defined benefit fair value of plan assets | 52.4 | 53.3 | $ 48.4
Net underfunded status | $ 5.6 | $ 9.9 |
Discount rate | 2.60% | 2.20% |
Long-term return on plan assets | 4.00% | 4.50% | 5.50%
Defined Benefit Pension Plans | U.S. | Equity Securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Long-term return on plan assets | 9.00% |  |
Percentage of plan asset allocation | 33.00% |  |
Defined Benefit Pension Plans | U.S. | Fixed Income Funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Long-term return on plan assets | 3.00% |  |
Percentage of plan asset allocation | 59.00% |  |

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- Definition Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(3) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e2919-114920 + Details
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- Definition Amount of actuarial present value of benefits attributed to service rendered by employee for defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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- Definition Amount included in accumulated other comprehensive (income) loss for prior service cost (credit) expected to be recognized in net periodic benefit cost (credit) for fiscal year following most recent annual statement of financial position. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (s) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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- Definition Amount of contribution expected to be received by defined benefit plan from employer in next fiscal year following current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4587-114921 + Details
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- Definition Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(02) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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- Definition Amount of funded (unfunded) status of defined benefit plan, measured as difference between fair value of plan assets and benefit obligation. Includes, but is not limited to, overfunded (underfunded) status. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123453770&loc=d3e1703-114919 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 + Details
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