XML 114 R97.htm IDEA: XBRL DOCUMENT v3.20.4
Lease Accounting Lessor Accounting (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Leases [Abstract]    
Rental Income, Nonoperating $ 144 $ 149
Lessor, Operating Lease, Payments to be Received, Next Twelve Months 103  
Lessor, Operating Lease, Payments to be Received, Two Years 64  
Lessor, Operating Lease, Payments to be Received, Three Years 8  
Lessor, Operating Lease, Payments to be Received, Four Years 3  
Lessor, Operating Lease, Payments to be Received, Five Years 2  
Lessor, Operating Lease, Payments to be Received, Thereafter 5  
Lessor, Operating Lease, Payments to be Received $ 185