XML 75 R62.htm IDEA: XBRL DOCUMENT v3.21.2
Debt (Narrative) (Details) - USD ($)
$ in Millions
Sep. 30, 2021
Dec. 31, 2020
Debt Instrument [Line Items]    
Fair value of long term debt $ 3,515 $ 1,943
Long-term Debt, Maturities, Repayments of Principal in Year Two 400  
Long-term Debt, Maturities, Repayments of Principal in Year Three 734  
Long-term Debt, Maturities, Repayments of Principal in Year Four $ 500