XML 123 R96.htm IDEA: XBRL DOCUMENT v3.19.2
Leases - Undiscounted Cash Flows to be Received Under Tolling Arrangements Accounted for as Sales-type Leases (Details)
$ in Millions
Jun. 30, 2019
USD ($)
Lessor, Lease, Description [Line Items]  
2019 (remaining) $ 7
2020 14
2021 14
2022 13
2023 12
Thereafter 135
Total undiscounted cash flows 195
Lease receivable 106
Difference between undiscounted cash flows and discounted cash flows 89
MISSISSIPPI POWER CO  
Lessor, Lease, Description [Line Items]  
2019 (remaining) 7
2020 14
2021 14
2022 13
2023 12
Thereafter 135
Total undiscounted cash flows 195
Lease receivable 106
Difference between undiscounted cash flows and discounted cash flows $ 89