Quarterly report pursuant to Section 13 or 15(d)

Leases - Subleases (Details)

v3.20.2
Leases - Subleases (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Leases [Abstract]          
Sublease Payments Receivable in 2020 $ 1   $ 1   $ 9
Sublease Income, Total 23 $ 31 75 $ 68  
Sublease Income, Variable $ 8 $ 5 $ 23 $ 10