Leases (Tables)

12 Months Ended

Dec. 31, 2023

Leases [Abstract]

Lease, Cost [Table Text Block]

	Year Ended December 31,
	2023		2022		2021
	(Millions)
Lease Cost:
Operating lease cost	$	38	$	34	$	35
Variable lease cost	31		26		15
Sublease income	(1)		—		(1)
Total lease cost	$	68	$	60	$	49
Cash paid for operating lease liabilities	$	37	$	33	$	35

	December 31,
	2023		2022
	(Millions)
Other Information:
Right-of-use asset (included in Regulatory assets, deferred charges, and other)	$	159	$	162
Operating lease liabilities:
Current (included in Accrued and other current liabilities)	$	24	$	25
Noncurrent (included in Regulatory liabilities, deferred income, and other)	$	148	$	148
Weighted-average remaining lease term – operating leases (years)	11		13
Weighted-average discount rate – operating leases	4.78%		4.62%

Lessee, Operating Lease, Liability, Maturity [Table Text Block]

At December 31, 2023, the following table represents our operating lease maturities, including renewal provisions that we have assessed as being reasonably certain of exercise, for each of the years ended December 31:

	(Millions)
2024	$	33
2025	27
2026	27
2027	24
2028	19
Thereafter	100
Total future lease payments	230
Less: Amount representing interest	58
Total obligations under operating leases	$	172