XML 124 R82.htm IDEA: XBRL DOCUMENT v3.20.4
Leases - Maturities of Expected Lease Revenues (Details)
$ in Millions
Dec. 31, 2020
USD ($)
Leases [Abstract]  
2021 $ 93
2022 77
2023 51
2024 35
2025 16
Thereafter 19
Total future lease maturities $ 291