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Leases - Other Information (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Leases [Abstract]      
ROU Assets - operating leases, net $ 257   $ 223
Short-term lease liability - operating leases 7   7
Long-term lease liability - operating leases 260   227
Total lease liability 267   $ 234
Cash paid for operating leases $ 10 $ 7  
Weighted average remaining lease term (in years) 24 years   25 years
Weighted average discount rate (as a percentage) 4300000.00%   4400000.00%