Document and Entity Information	6 Months Ended
	Jun. 30, 2011	Aug. 04, 2011
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	Jun. 30, 2011
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		294,602,077
Document fiscal year focus	2011
Document fiscal period focus	Q2
PEC
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
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