Consolidated Statements of Equity - Progress Energy (USD $) In Millions, unless otherwise specified		Total	Progress Energy [Member]		Common Stock [Member]	Common Stock [Member] Progress Energy [Member]	Additional Paid-In Capital [Member]	Additional Paid-In Capital [Member] Progress Energy [Member]	Unearned ESOP Common Stock [Member] Progress Energy [Member]	Retained Earnings [Member]	Retained Earnings [Member] Progress Energy [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 [Member]	Accumulated Defined Benefit Plans Adjustment [Member]	Accumulated Defined Benefit Plans Adjustment [Member] Progress Energy [Member]	Parent [Member]	Parent [Member] Progress Energy [Member]	Noncontrolling Interest [Member]		Noncontrolling Interest [Member] Progress Energy [Member]
Balance at Dec. 31, 2009		$ 21,886	$ 9,455		$ 1	$ 6,862	$ 20,661	$ 11	$ (12)	$ 1,460	$ 2,675	$ (22)	$ (35)	$ (336)	$ (52)	$ 21,750	$ 9,449	$ 136		$ 6
Cumulative effect of change in accounting principle			(2)																	(2)
Net income		1,323	863							1,320						1,320		3
Net income			859	[1]							856						856			3
Other comprehensive income		373	(38)									4	(28)	276	(10)	374	(38)	(1)
Common stock issuances, including dividend reinvestment and employee benefits		362	461		0	461	362									362	461
Allocation of ESOP shares			21			9			12								21
Common stock dividends			(726)								(726)						(726)
Distributions to noncontrolling interests		10	(2)																	(2)
Other			(1)																	(1)
Notes To Reconciliation Of Total Equity [Abstract]
Net income attributable to preferred shareholders of subsidiaries excluded from reconciliation of total equity			4
Balance at Dec. 31, 2010		22,653	10,027		1	7,332	21,023			1,496	2,805	(18)	(63)	(60)	(62)	22,522	10,023	131		4
Net income		513	185
Balance at Mar. 31, 2011
Balance at Dec. 31, 2010		22,653	10,027			7,332	21,023	11		1,496	2,805	(18)	(63)	(60)	(62)	22,522	10,023	131		4
Net income		1,714	582							1,706						1,706		8
Net income			578	[1]							575						575			3
Other comprehensive income		(243)	(40)									(53)	(79)	(49)	39	(236)	(40)	(7)
Common stock issuances, including dividend reinvestment and employee benefits		109	91			86	109	5								109	91
Common stock dividends			(628)								(628)						(628)
Distributions to noncontrolling interests		26	(3)																	(3)
Notes To Reconciliation Of Total Equity [Abstract]
Net income attributable to preferred shareholders of subsidiaries excluded from reconciliation of total equity			4
Balance at Dec. 31, 2011		22,865	10,025		1	7,418	21,132	16		1,873	2,752	(71)	(142)	(109)	(23)	22,772	10,021	93		4
Balance at Sep. 30, 2011
Net income		290	(74)
Balance at Dec. 31, 2011		22,865	10,025		1
Net income		299	152
Balance at Mar. 31, 2012
Balance at Dec. 31, 2011		22,865	10,025		1	7,418	21,132	16		1,873	2,752	(71)	(142)	(109)	(23)	22,772	10,021	93		4
Cumulative effect of change in accounting principle		82																82	[2]
Net income		1,782	407							1,768						1,768		12
Net Income (Loss) Available to Common Stockholders	[3]	1,780
Net income			403	[1]							400						400			3
Other comprehensive income		(76)	98									(29)	100	19	(2)	(72)	98	(4)
Common stock issuances, including dividend reinvestment and employee benefits		76	31			18	76	13								76	31
Common stock dividends			(369)								(369)						(369)
Distributions to noncontrolling interests		23	(2)																	(2)
Recapitalization for merger with Duke Energy						(7,436)		7,436
Other			(1)																	(1)
Notes To Reconciliation Of Total Equity [Abstract]
Net income attributable to preferred shareholders of subsidiaries excluded from reconciliation of total equity			4
Balance at Dec. 31, 2012		40,941	10,185		1		39,279	7,465		1,889	2,783	(100)	(42)	(90)	(25)	40,863	10,181	78		4
Balance at Sep. 30, 2012
Net income		437	34
Balance at Dec. 31, 2012		$ 40,941	$ 10,185		$ 1

[1] For the year ended December 31, 2012, consolidated net income of $407 million includes $4 million attributable to preferred shareholders of subsidiaries. For the year ended December 31, 2011, consolidated net income of $582 million includes $4 million attributable to preferred shareholders of subsidiaries. For the year ended December 31, 2010, consolidated net income of $863 million includes $4 million attributable to preferred shareholders of subsidiaries. Income attributable to preferred shareholders of subsidiaries is not a component of total equity and is excluded from the table above.

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

[3] For the year ended December 31, 2012, consolidated net income of $1,782 million includes $2 million attributable to preferred shareholders of subsidiaries. Income attributable to preferred shareholders of subsidiaries is not a component of total equity and is excluded from the table above.