XML 100 R93.htm IDEA: XBRL DOCUMENT v3.21.2
Debt - Narrative (Details) - USD ($)
$ in Millions
Jun. 30, 2021
Jan. 15, 2021
Dec. 31, 2020
Debt Disclosure [Abstract]      
Accrued interest compounded and added to principal   $ 21  
Unpaid cash interest compounded to principal   $ 10  
Debt due within one year $ 546   $ 6,177