Retirement Plan and Postretirement Benefits (Tables)

12 Months Ended

Dec. 31, 2014

Compensation and Retirement Disclosure [Abstract]

Schedule of Amounts Recognized in Balance Sheet

Amounts receivable from (payable to) NV Energy are included on the Consolidated Balance Sheets and consist of the following as of December 31(in millions):

	2014			2013
Qualified Pension Plan:
Other assets	$	—		$	13
Other long-term liabilities	(23		)	—
Non-Qualified Pension Plans:
Other current liabilities	(1		)	(4		)
Other long-term liabilities	(9		)	(8		)
Other Postretirement Plans -
Other long-term liabilities	1			(7		)