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Basis of Presentation and Significant Accounting Policies - Goodwill (Details)
$ in Millions
3 Months Ended 9 Months Ended 12 Months Ended
Dec. 31, 2022
USD ($)
reportingUnit
Sep. 30, 2022
reportingUnit
Dec. 31, 2022
USD ($)
reportingUnit
Dec. 31, 2021
USD ($)
reportingUnit
Dec. 31, 2020
USD ($)
Segment Reporting Information [Line Items]          
Number of reporting units | reportingUnit 5 3 3 3  
Goodwill impairment $ 64   $ 64 $ 0 $ 0
European Transportation          
Segment Reporting Information [Line Items]          
Goodwill impairment     $ 64    
Operating Segments | European Transportation          
Segment Reporting Information [Line Items]          
Number of reporting units | reportingUnit 4        
Goodwill impairment $ 64