Income Taxes (Tables)

9 Months Ended

Sep. 30, 2012

Income Taxes Disclosure [Line Items]

Schedule of effective income tax rate reconciliation

	Three months ended September 30				Nine months ended September 30
	2012		2011		2012		2011
Progress Energy	32.8	%	37.8	%	34.7	%	36.9	%
PEC	31.9	%	33.4	%	31.6	%	34.2	%
PEF	35.9	%	37.0	%	36.9	%	37.0	%

Schedule of excise taxes [Tables]

	Three months ended September 30				Nine months ended September 30
(in millions)	2012		2011		2012		2011
PEC	$	33	$	33	$	85	$	86
PEF		62		63		156		159
Progress Energy	$	95	$	96	$	241	$	245

PEC [Member]

Income Taxes Disclosure [Line Items]

Schedule of effective income tax rate reconciliation

	Three months ended September 30				Nine months ended September 30
	2012		2011		2012		2011
Progress Energy	32.8	%	37.8	%	34.7	%	36.9	%
PEC	31.9	%	33.4	%	31.6	%	34.2	%
PEF	35.9	%	37.0	%	36.9	%	37.0	%

Schedule of excise taxes [Tables]

	Three months ended September 30				Nine months ended September 30
(in millions)	2012		2011		2012		2011
PEC	$	33	$	33	$	85	$	86
PEF		62		63		156		159
Progress Energy	$	95	$	96	$	241	$	245

PEF [Member]

Income Taxes Disclosure [Line Items]

Schedule of effective income tax rate reconciliation

	Three months ended September 30				Nine months ended September 30
	2012		2011		2012		2011
Progress Energy	32.8	%	37.8	%	34.7	%	36.9	%
PEC	31.9	%	33.4	%	31.6	%	34.2	%
PEF	35.9	%	37.0	%	36.9	%	37.0	%

Schedule of excise taxes [Tables]

	Three months ended September 30				Nine months ended September 30
(in millions)	2012		2011		2012		2011
PEC	$	33	$	33	$	85	$	86
PEF		62		63		156		159
Progress Energy	$	95	$	96	$	241	$	245