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Debt - Other - Narrative (Details)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2019
USD ($)
Dec. 31, 2019
USD ($)
Line of Credit Facility [Line Items]    
Remaining other short-term borrowings payable $ 6 $ 6
Financing Arrangement [Member]    
Line of Credit Facility [Line Items]    
Funds borrowed for insurance premiums 11  
Repayments to financing company   5
Remaining other short-term borrowings payable $ 6 $ 6