Pension Plans and Postretirement Benefits Other Than Pensions

3 Months Ended

Mar. 31, 2012

Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]

Pension Plans and Postretirement Benefits Other Than Pensions

Pension Plans and Postretirement Benefits Other Than Pensions

Pension Plans

Edison International made contributions of $7 million during the three months ended March 31, 2012 and expects to make $279 million of additional contributions during the remainder of 2012. In 2012, annual contributions made to most of the pension plans for SCE employees are anticipated to be recovered through CPUC-approved regulatory mechanisms, pending outcome of the 2012 GRC decision. Annual contributions to these plans are expected to be, at a minimum, equal to the related annual expense.

Expense components are:

	Three months ended March 31,
(in millions)	2012			2011
Service cost	$	43		$	43
Interest cost	49			52
Expected return on plan assets	(59		)	(60		)
Amortization of prior service cost	1			2
Amortization of net loss	18			6
Expense under accounting standards	52			43
Regulatory adjustment (deferred)	25			(6		)
Total expense recognized	$	77		$	37

Postretirement Benefits Other Than Pensions

Edison International made contributions of $6 million during the three months ended March 31, 2012 and expects to make $59 million of additional contributions during the remainder of 2012. In 2012, annual contributions made to plans for SCE employees are anticipated to be recovered through CPUC-approved regulatory mechanisms, pending outcome of the 2012 GRC decision. Annual contributions are expected to be, at a minimum, equal to the total annual expense for these plans. Benefits under these plans, with some exceptions, are generally unvested and subject to change.

Expense components are:

	Three months ended March 31,
(in millions)	2012			2011
Service cost	$	13		$	11
Interest cost	30			33
Expected return on plan assets	(27		)	(28		)
Amortization of prior service credit	(9		)	(9		)
Amortization of net loss	12			9
Total expense	$	19		$	16