Employee Benefit Plans

3 Months Ended

Mar. 31, 2015

Compensation and Retirement Disclosure [Abstract]

Pension and Other Postretirement Benefits Disclosure [Text Block]

Employee Benefit Plans

CenterPoint Houston’s employees participate in CenterPoint Energy’s postretirement benefit plan. CenterPoint Houston’s net periodic cost includes the following components relating to postretirement benefits:

	Three Months Ended March 31,
	2015			2014
	(in millions)
Interest cost	$	3		$	4
Expected return on plan assets	(2		)	(1		)
Amortization of loss	1			—
Amortization of transition obligation	—			1
Net periodic cost	$	2		$	4

CenterPoint Houston expects to contribute approximately $7 million to its postretirement benefit plan in 2015, of which $2 million was contributed during the three months ended March 31, 2015.