Organization and Basis of Presentation (Tables)

9 Months Ended

Sep. 30, 2016

Organization And Basis Of Presentation [Line Items]

Schedule of Utility Inventory

The components of inventory are presented in the tables below.

	September 30, 2016
			Duke				Duke		Duke		Duke		Duke
	Duke		Energy		Progress		Energy		Energy		Energy		Energy
(in millions)	Energy		Carolinas		Energy		Progress		Florida		Ohio		Indiana
Materials and supplies	$	2,312	$	760	$	1,139	$	781	$	358	$	85	$	236
Coal held for electric generation	743		256		277		101		177		18		186
Oil, gas and other fuel held for electric generation	296		37		237		116		121		7		2
Total inventory	$	3,351	$	1,053	$	1,653	$	998	$	656	$	110	$	424

	December 31, 2015
			Duke				Duke		Duke		Duke		Duke
	Duke		Energy		Progress		Energy		Energy		Energy		Energy
(in millions)	Energy		Carolinas		Energy		Progress		Florida		Ohio		Indiana
Materials and supplies	$	2,389	$	785	$	1,133	$	776	$	357	$	81	$	301
Coal held for electric generation	1,114		451		370		192		178		16		267
Oil, gas and other fuel held for electric generation	307		40		248		120		128		8		2
Total inventory	$	3,810	$	1,276	$	1,751	$	1,088	$	663	$	105	$	570

Schedule of Excise Taxes

Excise taxes accounted for on a gross basis as both operating revenues and property and other taxes on the Condensed Consolidated Statements of Operations were as follows.

	Three Months Ended September 30,				Nine Months Ended September 30,
(in millions)	2016		2015		2016		2015
Duke Energy	$	107	$	109	$	285	$	308
Duke Energy Carolinas	6		9		21		27
Progress Energy	65		67		161		174
Duke Energy Progress	4		4		13		12
Duke Energy Florida	61		63		148		162
Duke Energy Ohio	26		24		77		80
Duke Energy Indiana	10		9		26		27

Unbilled Revenues [Member]

Organization And Basis Of Presentation [Line Items]

Schedule Of Unbilled Revenues With Restricted Receivables

Unbilled revenues, which are included within Receivables and Receivables of variable interest entities (VIEs) on the Condensed Consolidated Balance Sheets, are presented in the following table.

(in millions)	September 30, 2016		December 31, 2015
Duke Energy	$	800	$	748
Duke Energy Carolinas	318		283
Progress Energy	195		172
Duke Energy Progress	96		102
Duke Energy Florida	99		70
Duke Energy Ohio	2		3
Duke Energy Indiana	36		31

Duke Energy Ohio [Member] | Unbilled Revenues [Member]

Organization And Basis Of Presentation [Line Items]

Schedule Of Unbilled Revenues With Restricted Receivables

These receivables for unbilled revenues are shown in the table below.

(in millions)	September 30, 2016		December 31, 2015
Duke Energy Ohio	$	72	$	71
Duke Energy Indiana	109		97

Duke Energy Indiana [Member] | Unbilled Revenues [Member]

Organization And Basis Of Presentation [Line Items]

Schedule Of Unbilled Revenues With Restricted Receivables

These receivables for unbilled revenues are shown in the table below.

(in millions)	September 30, 2016		December 31, 2015
Duke Energy Ohio	$	72	$	71
Duke Energy Indiana	109		97