XML 32 R53.htm IDEA: XBRL DOCUMENT v3.20.1
Fair Value of Financial Instruments - Estimated Carrying Amounts and Fair Value of Financial Instruments Not Carried at Fair Value (Details) - USD ($)
$ in Millions
Mar. 31, 2020
Dec. 31, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions    
Long-term debt, including current portion $ 6,592 $ 6,042
Carrying Amount    
Fair Value, Balance Sheet Grouping, Financial Statement Captions    
Notes receivable 10 11
Long-term debt, including current portion 6,510 5,956
Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions    
Notes receivable 7 8
Long-term debt, including current portion 6,634 6,504
Fair Value | Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions    
Long-term debt, including current portion 5,967 6,388
Fair Value | Level 3    
Fair Value, Balance Sheet Grouping, Financial Statement Captions    
Long-term debt, including current portion $ 667 $ 116