Benefit Plans

6 Months Ended

Jun. 30, 2021

Retirement Benefits [Abstract]

Benefit Plans

BENEFIT PLANS

Pension Expense

The following table presents net periodic benefit (credit) / cost information relating to the Pension Plans combined:

	For the Three Months Ended				For the Six Months Ended
	June 30,				June 30,
	2021		2020		2021		2020
	(In Thousands)				(In Thousands)
Components of net periodic benefit (credit) / cost:
Service cost	$	2,335	$	2,068	$	4,669	$	4,136
Interest cost	3,915		5,538		7,830		11,076
Expected return on plan assets	(10,454)		(9,445)		(20,908)		(18,890)
Amortization of prior service cost	736		919		1,472		1,838
Amortization of actuarial loss	1,382		2,028		2,764		4,057
Net periodic benefit (credit) / cost	$	(2,086)	$	1,108	$	(4,173)	$	2,217

The components of net periodic benefit (credits) / costs other than service costs are included in "Other income, net" in the Unaudited Condensed Consolidated Statements of Operations.

In addition, AES Indiana provides postretirement health care benefits to certain active or retired employees and the spouses of certain active or retired employees. These postretirement health care benefits and the related unfunded obligation of $4.4 million and $4.3 million at June 30, 2021 and December 31, 2020, respectively, were not material to the Financial Statements in the periods covered by this report.