Leases (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Lessee, Lease, Description [Line Items]
Operating Lease, Cost		$ 12	$ 10
Lessee, Operating Lease, Liability, to be Paid		389
Lessee, Operating Lease, Liability, Undiscounted Excess Amount		(61)
Operating Lease, Liability		328
Operating Lease, Liability, Current		(36)		$ (36)
Operating lease liabilities		292		$ 301
PPAs
Lessee, Lease, Description [Line Items]
Operating Lease, Cost		11	9
Lessee, Operating Lease, Liability, to be Paid		347
Lessee, Operating Lease, Liability, Undiscounted Excess Amount		(52)
Operating Lease, Liability		295
Property, Plant and Equipment, Other Types
Lessee, Lease, Description [Line Items]
Operating Lease, Cost	[1]	1	$ 1
Lessee, Operating Lease, Liability, to be Paid		42
Lessee, Operating Lease, Liability, Undiscounted Excess Amount		(9)
Operating Lease, Liability		$ 33

[1] Includes immaterial short-term lease expense.