Debt - DCSP Financing Arrangements (FY) (Details) |
3 Months Ended | 6 Months Ended | 12 Months Ended | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
|
Oct. 31, 2024
USD ($)
|
Jun. 30, 2025
USD ($)
|
Jun. 30, 2024
USD ($)
|
Jun. 30, 2025
USD ($)
|
Jun. 30, 2024
USD ($)
|
Dec. 31, 2024
USD ($)
|
Dec. 31, 2023
USD ($)
|
Dec. 31, 2022
USD ($)
|
Jun. 30, 2023
MW
|
Jun. 06, 2023
MW
|
|
| Lessor, Lease, Description [Line Items] | ||||||||||
| Electrical power expected to be received in phases | MW | 78 | 78 | ||||||||
| Property, plant and equipment | $ 18,585,117,000 | $ 18,585,117,000 | $ 12,880,005,000 | $ 3,600,786,000 | ||||||
| Term of contract | 14 years | 14 years | ||||||||
| Interest expense | 256,162,000 | $ 67,097,000 | 513,533,000 | $ 107,600,000 | $ 349,203,000 | $ 26,967,000 | $ 8,374,000 | |||
| DCSP Financing Obligation | ||||||||||
| Lessor, Lease, Description [Line Items] | ||||||||||
| Interest rate | 15.00% | 15.00% | ||||||||
| Interest income | 6,000,000 | 9,000,000 | $ 0 | |||||||
| Interest expense | 8,000,000 | 12,000,000 | 3,000,000 | |||||||
| DCSP Note Receivable | ||||||||||
| Lessor, Lease, Description [Line Items] | ||||||||||
| Financing receivable | 288,000,000 | 288,000,000 | $ 224,000,000 | |||||||
| Financing receivable, term | 7 years | 7 years | ||||||||
| Financing receivable, stated rate | 13.00% | 13.00% | ||||||||
| DCSP Note Receivable | DCSP Financing Obligation | ||||||||||
| Lessor, Lease, Description [Line Items] | ||||||||||
| Financing receivable | $ 237,000,000 | $ 237,000,000 | $ 116,000,000 | |||||||
| DCSP Note Receivable | Unfunded Loan Commitment | ||||||||||
| Lessor, Lease, Description [Line Items] | ||||||||||
| Financing receivable | $ 305,000,000 | |||||||||
| Critical Infrastructure Assets | ||||||||||
| Lessor, Lease, Description [Line Items] | ||||||||||
| Property, plant and equipment | $ 116,000,000 | |||||||||