Benefit Plans and Other Postretirement Benefits (Tables)

6 Months Ended

Jun. 30, 2025

Components of Net Periodic Benefit Cost (Credit)


	Three Months Ended June 30
	2025		2024		2025		2024
(Millions of Dollars)	Pension Benefits				Postretirement Health Care Benefits
Service cost	$	5	$	5	$	—	$	—
Interest cost (a)	15		14		5		4
Expected return on plan assets (a)	(20)		(19)		(5)		(4)

Amortization of net loss (a)	2		1		1		—

Net periodic benefit cost	2		1		1		—
Effects of regulation	(1)		(4)		—		—
Net benefit cost (credit) recognized for financial reporting	$	1	$	(3)	$	1	$	—


	Six Months Ended June 30
	2025		2024		2025		2024
(Millions of Dollars)	Pension Benefits				Postretirement Health Care Benefits
Service cost	$	10	$	10	$	—	$	—
Interest cost (a)	30		28		10		8
Expected return on plan assets (a)	(40)		(38)		(9)		(8)

Amortization of net loss (a)	3		3		1		1

Net periodic benefit cost	3		3		2		1
Effects of regulation	(2)		(4)		—		—
Net benefit cost (credit) recognized for financial reporting	$	1	$	(1)	$	2	$	1

(a)The components of net periodic cost other than the service cost component are included in the line item “Other income, net” in the consolidated statements of income or capitalized on the consolidated balance sheets as a regulatory asset.

PUBLIC SERVICE CO OF COLORADO 10-Q