Regulatory Matters - Minnesota Solar Energy Standard (Details) - MPUC [Member]
|
Dec. 31, 2019
MW
|
| Regulatory Matters [Line Items] |
|
| Minnesota Solar Energy Standard - Overall Mandate Percentage |
1.50%
|
| Minnesota Solar Energy Standard - Camp Ripley Project [Member] | Minnesota Power [Member] |
|
| Regulatory Matters [Line Items] |
|
| Generating Capacity Owned (MW) |
10
|
| Minnesota Solar Energy Standard - Community Solar Garden Project - Purchased Output [Member] | Minnesota Power [Member] |
|
| Regulatory Matters [Line Items] |
|
| Generating Capacity Counterparty Owned (MW) |
1
|
| Minnesota Solar Energy Standard - Community Solar Garden Project - Owned and Operated [Member] | Minnesota Power [Member] |
|
| Regulatory Matters [Line Items] |
|
| Generating Capacity Owned (MW) |
0.04
|
| Minimum [Member] |
|
| Regulatory Matters [Line Items] |
|
| Minnesota Solar Energy Standard - Overall Mandate Percentage |
1.50%
|
| Minnesota Solar Energy Standard - Small Scale Solar Mandate Percentage |
10.00%
|
| Maximum [Member] |
|
| Regulatory Matters [Line Items] |
|
| Minnesota Solar Energy Standard - Qualifying Capacity for Small Scale Solar Mandate (MW) |
0.04
|