Consolidated Balance Sheets - SPPC - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 1,086	$ 1,108
Trade receivables, net	1,613	1,785
Inventories	902	882
Other current assets	796	814
Total current assets	4,972	5,243
Regulatory assets	4,182	4,155
Other assets	1,076	1,008
Total assets	84,246	83,618
Current liabilities:
Accounts payable	1,246	1,564
Accrued interest	486	469
Accrued property, income and other taxes	377	372
Regulatory Liability, Current	434	402
Other current liabilities	961	896
Total current liabilities	6,428	6,089
Regulatory liabilities	2,676	2,631
Deferred income taxes	12,797	12,685
Other long-term liabilities	2,843	2,854
Total liabilities	$ 61,122	$ 61,083
Commitments and contingencies
Equity:
Common stock	$ 0	$ 0
Additional paid-in capital	6,403	6,403
Retained earnings	17,396	16,906
Total shareholder's equity	22,990	22,401
Total liabilities and equity	84,246	83,618
Sierra Pacific Power Company [Member]
Current assets:
Cash and cash equivalents	135	106
Trade receivables, net	99	124
Inventories	39	39
Other current assets	20	13
Total current assets	293	282
Public Utilities, Property, Plant and Equipment, Net	2,770	2,766
Regulatory assets	430	432
Other assets	7	7
Total assets	3,500	3,487
Current liabilities:
Accounts payable	97	127
Accrued interest	16	15
Accrued property, income and other taxes	13	13
Regulatory Liability, Current	90	78
Long-term Debt and Financial and Capital Lease Obligations, Current	453	453
Customer Deposits, Current	17	17
Other current liabilities	14	11
Total current liabilities	700	714
Long-term Debt and Financial and Capital Lease Obligations	749	749
Regulatory liabilities	229	230
Deferred income taxes	580	570
Other long-term liabilities	149	148
Total liabilities	$ 2,407	$ 2,411
Commitments and contingencies
Equity:
Common stock	$ 0	$ 0
Additional paid-in capital	1,111	1,111
Retained earnings	(18)	(35)
Total shareholder's equity	1,093	1,076
Total liabilities and equity	$ 3,500	$ 3,487