Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements (Details)

v3.20.4
Fair Value Measurements (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Liabilities:    
Debt, fair value $ 9,011 $ 8,378
Level 1    
Liabilities:    
Debt, fair value 0 0
Level 2    
Liabilities:    
Debt, fair value 9,011 8,378
Level 3    
Liabilities:    
Debt, fair value $ 0 $ 0