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Leases Operating Lease Right-Of-Use Assets (Details)
$ in Millions
Dec. 31, 2020
USD ($)
Lessor, Operating Lease, Payments, Fiscal Year Maturity [Abstract]  
Lessor, Operating Lease, Payment to be Received, Year One $ 14
Lessor, Operating Lease, Payment to be Received, Year Two 14
Lessor, Operating Lease, Payment to be Received, Year Three 14
Lessor, Operating Lease, Payment to be Received, Year Four 14
Lessor, Operating Lease, Payment to be Received, Year Five 14
Lessor, Operating Lease, Payment to be Received, after Year Five 227
Total Minimum Future Lease Receipts $ 297