Annual report pursuant to Section 13 and 15(d)

Other Non-Current Assets - Equity Method Investments (Details)

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Other Non-Current Assets - Equity Method Investments (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]    
Equity Method Investment, Other than Temporary Impairment   $ 87
Equity method investments $ 81 108
Midship Holdings LLC [Member]    
Schedule of Equity Method Investments [Line Items]    
Equity Method Investment, Other than Temporary Impairment 129  
Equity method investments $ 80 $ 105