Document and Entity Information	9 Months Ended
	Sep. 30, 2012	Nov. 05, 2012
Document and Entity Information [Line Items]
Entity registrant name	PROGRESS ENERGY INC
Entity central index key	0001094093
Document type	10-Q
Document period end date	Sep. 30, 2012
Amendment flag	false
Entity current reporting status	Yes
Entity voluntary filers	No
Current fiscal year end date	--12-31
Entity filer category	Large Accelerated Filer
Entity well known seasoned issuer	Yes
Entity common stock shares outstanding		100
Document fiscal year focus	2012
Document fiscal period focus	Q3
PEC [Member]
Document and Entity Information [Line Items]
Entity registrant name	Carolina Power & Light Co
Entity central index key	0000017797
Current fiscal year end date	--12-31
Entity filer category	Non-accelerated Filer
PEF [Member]
Document and Entity Information [Line Items]
Entity registrant name	Florida Power Corp
Entity central index key	0000037637
Current fiscal year end date	--12-31
Entity filer category	Non-accelerated Filer