Consolidated Statements of Equity - Progress Energy Carolinas (USD $) In Millions	Total	Progress Energy Carolinas [Member]	Common Stock [Member]	Common Stock [Member] Progress Energy Carolinas [Member]	Unearned ESOP Common Stock [Member] Progress Energy Carolinas [Member]	Retained Earnings [Member]	Retained Earnings [Member] Progress Energy Carolinas [Member]	Accumulated Net Gain Loss From Designated Or Qualifying Cash Flow Hedges [Member]	Accumulated Net Gain Loss From Designated Or Qualifying Cash Flow Hedges [Member] Progress Energy Carolinas [Member]	Parent [Member]	Parent [Member] Progress Energy Carolinas [Member]	Noncontrolling Interest [Member]		Noncontrolling Interest [Member] Progress Energy Carolinas [Member]
Balance at Dec. 31, 2009	$ 21,886	$ 4,660	$ 1	$ 2,108	$ (12)	$ 1,460	$ 2,588	$ (22)	$ (27)	$ 21,750	$ 4,657	$ 136		$ 3
Cumulative effect of change in accounting principle		(2)												(2)
Net income	1,323	602				1,320	603			1,320	603	3		(1)
Other comprehensive income	373	(6)						4	(6)	374	(6)	(1)
Allocation of ESOP shares		22		10	12						22
Stock-based compensation expense		12		12							12
Dividends paid to parent		(100)					(100)				(100)
Preferred stock dividends at stated rate		(3)					(3)				(3)
Tax dividend		(5)					(5)				(5)
Balance at Dec. 31, 2010	22,653	5,180	1	2,130		1,496	3,083	(18)	(33)	22,522	5,180	131
Net income	513	131
Balance at Mar. 31, 2011
Balance at Dec. 31, 2010	22,653	5,180	1	2,130		1,496	3,083	(18)	(33)	22,522	5,180	131
Net income	1,714	516				1,706	516			1,706	516	8
Other comprehensive income	(243)	(38)						(53)	(38)	(236)	(38)	(7)
Stock-based compensation expense		18		18							18
Dividends paid to parent		(585)					(585)				(585)
Preferred stock dividends at stated rate		(3)					(3)				(3)
Balance at Dec. 31, 2011	22,865	5,088	1	2,148		1,873	3,011	(71)	(71)	22,772	5,088	93
Balance at Sep. 30, 2011
Net income	290	79
Balance at Dec. 31, 2011	22,865	5,088	1
Net income	299	52
Balance at Mar. 31, 2012
Balance at Dec. 31, 2011	22,865	5,088	1	2,148		1,873	3,011	(71)	(71)	22,772	5,088	93
Cumulative effect of change in accounting principle	82											82	[1]
Net income	1,782	272				1,768	272			1,768	272	12
Other comprehensive income	(76)	71						(29)	71	(72)	71	(4)
Stock-based compensation expense		11		11							11
Dividends paid to parent		(310)					(310)				(310)
Preferred stock dividends at stated rate		(3)					(3)				(3)
Tax dividend		(2)					(2)				(2)
Balance at Dec. 31, 2012	40,941	5,127	1	2,159		1,889	2,968	(100)		40,863	5,127	78
Balance at Sep. 30, 2012
Net income	437	93
Balance at Dec. 31, 2012	$ 40,941	$ 5,127	$ 1

[1] Refer to Note 2 for further information on the deconsolidation of DS Cornerstone, LLC.