Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020	Mar. 31, 2021
Operating Loss Carryforwards [Line Items]
Income tax expense	$ 2.6	$ 12.0	$ 3.7	$ 2.3
Operating loss carryforwards, US						$ 96.0
Reduced deferred tax asset carryforward					$ 69.6
CARES Act
Operating Loss Carryforwards [Line Items]
Deferred employer payroll tax obligation	10.9		10.9
CARES Act | Accrued Liabilities
Operating Loss Carryforwards [Line Items]
Deferred employer payroll tax obligation	5.4		5.4
CARES Act | Other Liabilities
Operating Loss Carryforwards [Line Items]
Deferred employer payroll tax obligation	$ 5.5		$ 5.5
Domestic Tax Authority
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards					170.3
Foreign Tax Authority
Operating Loss Carryforwards [Line Items]
Foreign operating loss carryforward					$ 112.6
Foreign Tax Authority | Energy Segment
Operating Loss Carryforwards [Line Items]
Foreign operating loss carryforward						$ 29.3