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Financial Instruments and Fair Value - Estimated Fair Value of Financial Instruments (Details) - USD ($)
Dec. 31, 2021
Dec. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Collateral amount $ 0 $ 7,000,000
Prepayments and other current assets | Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Other financial instruments in asset positions(a) $ 35,000,000 $ 1,000,000