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Leases (Details)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2019
USD ($)
Sep. 30, 2019
USD ($)
Lessee, Lease, Description [Line Items]    
Lessee, Operating Lease, Term of Contract 108 years 108 years
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year $ 8 $ 8
Operating Lease, Cost 10 31
Short-term Lease, Cost 0 0
Variable Lease, Cost 7 21
Sublease Income 0 (1)
Lease, Cost 17 51
Operating Lease, Payments 10 30
Operating Lease, Right-of-Use Asset 213 213
Operating Lease, Liability, Current 23 23
Operating Lease, Liability, Noncurrent $ 190 $ 190
Operating Lease, Weighted Average Remaining Lease Term 13 years 13 years
Operating Lease, Weighted Average Discount Rate, Percent 4.60% 4.60%
Lessee, Operating Lease, Liability, Payments, Due Year Two $ 32 $ 32
Lessee, Operating Lease, Liability, Payments, Due Year Three 33 33
Lessee, Operating Lease, Liability, Payments, Due Year Four 27 27
Lessee, Operating Lease, Liability, Payments, Due Year Five 21 21
Lessee, Operating Lease, Liability, Payments, Due after Year Five 171 171
Lessee, Operating Lease, Liability, Payments, Due 292 292
Lessee, Operating Lease, Liability, Undiscounted Excess Amount 79 79
Operating Lease, Liability $ 213 $ 213
Minimum [Member]    
Lessee, Lease, Description [Line Items]    
Lessee, Operating Lease, Term of Contract 1 year 1 year
Maximum [Member]    
Lessee, Lease, Description [Line Items]    
Lessee, Operating Lease, Term of Contract 15 years 15 years