CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Operating revenue:
Electric	$ 2,128,230	$ 2,147,220	$ 2,107,469
Gas	1,086,095	1,168,850	1,011,531
Other	831	2,695	3,217
Total operating revenue	3,215,156	3,318,765	3,122,217
Energy costs:
Purchased electricity	622,288	771,405	773,429
Electric generation fuel	204,956	199,471	268,147
Residential exchange	(73,555)	(71,147)	(75,109)
Purchased gas	538,612	622,088	535,933
Unrealized (gain) loss on derivative instruments, net	(133,606)	11,494	54,095
Utility operations and maintenance	512,765	497,921	486,701
Non-utility expense and other	814	9,442	23,952
Depreciation	337,952	299,597	292,634
Amortization	55,819	72,381	71,572
Conservation amortization	114,177	107,646	90,109
Taxes other than income taxes	319,399	323,527	292,520
Total operating expenses	2,499,621	2,843,825	2,813,983
Operating income	715,535	474,940	308,234
Other income (deductions):
Other income	49,069	58,052	45,196
Other expense	(11,770)	(5,380)	(5,673)
Non-hedged interest rate derivative expense	(4,288)	(28,601)	(7,955)
Interest charges:
AFUDC	22,216	29,949	14,157
Interest expense	(392,216)	(371,910)	(321,167)
Income (loss) before income taxes	378,546	157,050	32,792
Income tax (benefit) expense	104,725	33,760	2,481
Net income (loss)	273,821	123,290	30,311
PUGET SOUND ENERGY, INC.
Operating revenue:
Electric	2,128,230	2,147,220	2,107,469
Gas	1,086,095	1,168,850	1,011,531
Other	1,934	3,733	3,217
Total operating revenue	3,216,259	3,319,803	3,122,217
Energy costs:
Purchased electricity	622,288	771,983	774,007
Electric generation fuel	204,956	199,471	268,147
Residential exchange	(73,555)	(71,147)	(75,109)
Purchased gas	538,612	622,088	535,933
Unrealized (gain) loss on derivative instruments, net	(119,120)	54,146	166,953
Utility operations and maintenance	512,765	497,921	486,701
Non-utility expense and other	9,977	11,147	11,159
Depreciation	337,952	299,597	292,634
Amortization	55,819	72,381	71,572
Conservation amortization	114,177	107,646	90,109
Taxes other than income taxes	319,399	323,527	292,520
Total operating expenses	2,523,270	2,888,760	2,914,626
Operating income	692,989	431,043	207,591
Other income (deductions):
Other income	49,056	58,041	45,153
Other expense	(11,770)	(5,380)	(5,673)
Interest charges:
AFUDC	22,216	29,949	14,157
Interest expense	(246,811)	(231,212)	(234,793)
Interest expense on parent note	(202)	(204)	(218)
Income (loss) before income taxes	505,478	282,237	26,217
Income tax (benefit) expense	149,308	78,117	122
Net income (loss)	$ 356,170	$ 204,120	$ 26,095