Quarterly report pursuant to Section 13 or 15(d)

Leases - Subleases (Details)

v3.20.2
Leases - Subleases (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Leases [Abstract]          
Sublease Payments Receivable in 2020 $ 0   $ 0   $ 9
Sublease Income, Fixed 9 $ 23 61 $ 81  
Sublease Income, Variable 1 5 24 15  
Sublease Income, Total $ 10 $ 28 $ 85 $ 96