Leases - Future Minimum Lease Payments (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Total operating leases
2025	$ 6.0
2026	5.9
2027	5.8
2028	5.7
2029	2.9
Thereafter	75.9
Total minimum lease payments	102.2
Less: interest	(60.4)
Present value of minimum lease payments	41.8
Less: short-term lease liabilities	(4.3)	$ (4.7)
Long-term operating lease liabilities	37.5	38.8
Finance leases
2025	10.9
2026	10.7
2027	14.8
2028	14.8
2029	15.2
Thereafter	1,116.7
Total minimum lease payments	1,183.1
Less: interest	(879.6)
Present value of minimum lease payments	303.5
Less: short-term lease liabilities	(0.2)
Long-term finance lease liabilities	303.3	145.9
Land lease - utility solar generation
Finance leases
2025	7.3
2026	8.1
2027	12.2
2028	12.4
2029	12.7
Thereafter	954.4
Total minimum lease payments	1,007.1
Less: interest	(749.2)
Present value of minimum lease payments	257.9
Less: short-term lease liabilities	0.0
Long-term finance lease liabilities	257.9	144.8
Land lease - non-utility energy infrastructure solar generation
Finance leases
2025	3.3
2026	2.3
2027	2.3
2028	2.3
2029	2.4
Thereafter	159.7
Total minimum lease payments	172.3
Less: interest	(128.5)
Present value of minimum lease payments	43.8
Less: short-term lease liabilities	0.0
Long-term finance lease liabilities	43.8	0.0
Other
Finance leases
2025	0.3
2026	0.3
2027	0.3
2028	0.1
2029	0.1
Thereafter	2.6
Total minimum lease payments	3.7
Less: interest	(1.9)
Present value of minimum lease payments	1.8
Less: short-term lease liabilities	(0.2)	0.0
Long-term finance lease liabilities	$ 1.6	$ 1.1