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Accounts Payable and Accrued Liabilities (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Trade payables | $ 4.9 | $ 7.0
Postretirement health and life benefit obligations - current | 11.6 | 14.2
Compensation and benefits payable | 22.2 | 13.1
Provision for Loss on Contracts | 7.0 | 10.0
Operating Lease, Liability, Current | 2.4 | 2.5
Accrued severance payments | 0.0 | 1.4
Other accrued liabilities | 2.5 | 2.5
Accounts payable and accrued liabilities | $ 50.6 | $ 50.7

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