Commitments and Contingencies (Tables)

3 Months Ended

Mar. 31, 2024

Commitments and Contingencies Disclosure [Abstract]

Lease, Cost

	Three Months Ended March 31
(Millions of Dollars)	2024		2023
Operating leases
PPA capacity payments	$	13	$	13
Other operating leases (a)	1		1
Total operating lease expense (b)	$	14	$	14

(a)Includes immaterial short-term lease expense for 2024 and 2023.

(b)PPA capacity payments are included in electric fuel and purchased power on the statements of income. Expense for other operating leases is included in operating and maintenance expense and electric fuel and purchased power.

Lessee, Operating Lease, Liability, Maturity

Commitments under operating leases as of March 31, 2024:

(Millions of Dollars)	PPA Operating Leases		Other Operating Leases		Total Operating Leases
Total minimum obligation	$	439	$	49	$	488
Interest component of obligation	(81)		(12)		(93)
Present value of minimum obligation	$	358	$	37	395
Less current portion					(33)
Noncurrent operating lease liabilities					$	362