Employee Retirement Plans - Narrative (Details)		3 Months Ended	12 Months Ended
	Mar. 20, 2018 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($) installment	Dec. 31, 2018 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2017 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Defined contribution section employees contribution (as a percent)						50.00%
Defined benefit, maximum employees contributions percentage						6.00%
Employee annual salary contributions capped						$ 6,000
Defined benefit, matching contribution amount						300,000	$ 400,000
Deferred contributions	$ 13,100,000
Profit percent	10.00%
Payment period	2 years
Dividend percent	50.00%
Market value of defined benefit plan assets						187,400,000	162,800,000		$ 190,200,000
Percentage of funding ratio								80.00%
Contributions due to payable to plans						32,000,000.0
Net pension cost						6,500,000	4,600,000
Net recognized benefit cost and other comprehensive income						1,400,000	2,100,000
Gain included in other comprehensive income						$ 7,900,000	6,700,000
Benefits increasing with RPI limited, percentage						5.00%
Aggregate expected contributions towards benefit plans						$ 32,000,000.0
Global Marine Personal Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Defined benefit, maximum employees contributions percentage						7.50%
Defined benefit, matching contribution amount						$ 7,000,000.0	3,800,000
Defined benefit, minimum employees contributions percentage						2.00%
Defined benefit, employer matching rate plus an additional fixed contributions percentage (as a percent)						5.00%
Global Marine Systems Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Defined benefit, maximum employees contributions percentage						5.00%
Defined benefit, minimum employees contributions percentage						8.00%
Percentage of pensionable salaries						9.20%
Defined benefit, employer deficit contributions per year						$ 1,400,000
Market value of defined benefit plan assets		$ 2,800,000				183,900,000	160,000,000.0
Percentage of market value of defined benefit plan assets		0.08%
Deficit contributions receivable amount		$ 394,000,000
Percentage of accrued service and projected salaries		99.70%
Percentage of pensionable salaries		20.00%
Fixed Contributions
Defined Benefit Plan Disclosure [Line Items]
Defined benefit, matching contribution amount						6,700,000	2,600,000
Profit-Related Contributions
Defined Benefit Plan Disclosure [Line Items]
Defined benefit, matching contribution amount						$ 300,000	1,200,000
Merchant Navy Officers Pension Fund
Defined Benefit Plan Disclosure [Line Items]
Actuarial valuation assumption used, retail price Inflation rate per year (as a percent)						3.10%
Actuarial valuation assumption used, consumer price Inflation rate per year (as a percent)						2.10%
Actuarial valuation assumption used, pre-retirement return on investment per year (as a percent)						4.75%
Actuarial valuation assumption used, post-retirement return on investment per year (as a percent)						2.60%
Expected rate of pensions increase per year (as a percent)						2.90%
Market value of defined benefit plan assets		$ 3,600,000,000				$ 183,900,000	160,000,000.0
Global Marine Systems (Guernsey) Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Actuarial valuation assumption used, pre-retirement return on investment per year (as a percent)								3.50%
Actuarial valuation assumption used, post-retirement return on investment per year (as a percent)								2.60%
Expected rate of pensions increase per year (as a percent)								3.40%
Market value of defined benefit plan assets								$ 2,600,000
Inflation rate percentage								3.70%
Amount of past service shortfall								$ 1,000,000.0
Percentage of funding ratio								73.00%
Number of annual contributions | installment						6
Amount of annual contributions, through 2024						$ 200,000
Final contribution to plans, expected April 2025						$ 100,000
Global Marine Systems (Guernsey) Pension Plan | Minimum
Defined Benefit Plan Disclosure [Line Items]
Defined contribution section employees contribution (as a percent)						2.00%
Defined benefit, minimum employees contributions percentage						5.00%
Global Marine Systems (Guernsey) Pension Plan | Maximum
Defined Benefit Plan Disclosure [Line Items]
Defined contribution section employees contribution (as a percent)						7.50%
Defined benefit, minimum employees contributions percentage						8.00%
Schuff
Defined Benefit Plan Disclosure [Line Items]
Defined benefit, matching contribution amount						$ 1,800,000	1,200,000
Defined benefit pension plan contribution made by employer						$ 6,200,000	$ 12,200,000
Schuff | Maximum
Defined Benefit Plan Disclosure [Line Items]
Percentage of employees covered under plan						5.00%
Ex Care | Global Marine Personal Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Defined benefit, maximum employees contributions percentage						7.50%
Defined benefit, minimum employees contributions percentage						2.50%
Defined Contribution Plan, Employer Matching Contribution, Tranche One | Schuff
Defined Benefit Plan Disclosure [Line Items]
Defined contribution section employees contribution (as a percent)						100.00%
Defined benefit, maximum employees contributions percentage						1.00%
Defined Contribution Plan, Employer Matching Contribution, Tranche Two | Schuff
Defined Benefit Plan Disclosure [Line Items]
Defined contribution section employees contribution (as a percent)						50.00%
Defined benefit, maximum employees contributions percentage						5.00%
Scenario, Forecast
Defined Benefit Plan Disclosure [Line Items]
Defined benefit, matching contribution amount			$ 3,100,000	$ 7,200,000	$ 7,100,000