Organization and Basis of Presentation (Amounts Attributable to Controlling Interests)(Details) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Organization And Basis Of Presentation [Line Items]
Income (Loss) from Continuing Operations	$ 891	$ 946	$ 2,367	$ 1,902
Income (Loss) from Continuing Operations Attributable to Noncontrolling Interest	3	4	11	12
Income (Loss) from Continuing Operations Attributable to Parent	888	942	2,356	1,890
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	378	62	(578)	82
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Noncontrolling Interest	(8)		(8)	(5)
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	386	62	(570)	87
Net income (loss)	1,269	1,008	1,789	1,984
Net Income (Loss) Attributable to Noncontrolling Interest	(5)	4	3	7
Net Income (Loss) Attributable to Parent	1,274	1,004	1,786	1,977
Progress Energy [Member]
Organization And Basis Of Presentation [Line Items]
Income (Loss) from Continuing Operations	330	328	741	469
Income (Loss) from Continuing Operations Attributable to Noncontrolling Interest	1	1	2	2
Income (Loss) from Continuing Operations Attributable to Parent	329	327	739	467
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest		14	(6)	10
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	0	14	(6)	10
Net income (loss)	330	342	735	479
Net Income (Loss) Attributable to Noncontrolling Interest	1	1	2	2
Net Income (Loss) Attributable to Parent	$ 329	$ 341	$ 733	$ 477