Business Segments (Tables)

12 Months Ended

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Segment Reporting Information [Line Items]

Business Segment Data

		Year Ended December 31, 2013
								Total
		Regulated		International		Commercial		Reportable
(in millions)		Utilities		Energy		Power		Segments		Other		Eliminations		Total
Unaffiliated revenues(a)(b)(c)		$	20,871	$	1,546	$	2,106	$	24,523	$	75	$	―	$	24,598
Intersegment revenues			39		―		39		78		88		(166)		―
	Total revenues	$	20,910	$	1,546	$	2,145	$	24,601	$	163	$	(166)	$	24,598
Interest expense		$	986	$	86	$	64	$	1,136	$	417	$	(7)	$	1,546
Depreciation and amortization			2,323		100		250		2,673		135		―		2,808
Equity in earnings of unconsolidated affiliates			(1)		110		7		116		6		―		122
Income tax expense (benefit)			1,522		166		(104)		1,584		(323)		―		1,261
Segment income(a)(b)(c)(d)(e)(f)(g)			2,504		408		(3)		2,909		(261)		―		2,648
Add back noncontrolling interest component															11
Income from discontinued operations, net of tax															17
Net income														$	2,676
Capital investments expenditures and acquisitions		$	5,049	$	67	$	268	$	5,384	$	223	$	―	$	5,607
Segment assets			99,884		4,998		6,955		111,837		2,754		188		114,779
(a)	In May 2013, Duke Energy Ohio implemented revised customer rates approved by the PUCO. This increase impacts Regulated Utilities. See Note 4 for additional information about the revised customer rates.
(b)	In June 2013, Duke Energy Progress implemented revised customer rates approved by the NCUC. This increase impacts Regulated Utilities. See Note 4 for additional information about the revised customer rates.
(c)	In September 2013, Duke Energy Carolinas implemented revised rates approved by the NCUC and the PSCSC. This increase impacts Regulated Utilities. See Note 4 for additional information about the revised customer rates.
(d)	Regulated Utilities recorded charges related to Duke Energy Florida's Crystal River Unit 3. See Note 4 for additional information about the Crystal River Unit 3 charges.
(e)	Regulated Utilities recorded an impairment charge related to Duke Energy Progress' Shearon Harris Nuclear Station (Harris) site. Regulated Utilities also recorded an impairment charge related to Duke Energy Florida's proposed nuclear plant in Levy County, Florida (Levy) site. See Note 4 for additional information about the Harris site and Levy site impairments.
(f)	Other includes after-tax costs to achieve the merger with Progress Energy. See Notes 2 and 25 for additional information about the merger and related costs.
(g)	Other includes gain from the sale of Duke Energy's ownership interest in DukeNet. See Note 12 for additional information on the sale of DukeNet.

		Year Ended December 31, 2012
								Total
		Regulated		International		Commercial		Reportable
(in millions)		Utilities		Energy		Power		Segments		Other		Eliminations		Total
Unaffiliated revenues		$	16,042	$	1,549	$	2,020	$	19,611	$	13	$	―	$	19,624
Intersegment revenues			38		―		58		96		47		(143)		―
	Total revenues	$	16,080	$	1,549	$	2,078	$	19,707	$	60	$	(143)	$	19,624
Interest expense		$	806	$	77	$	63	$	946	$	296	$	―	$	1,242
Depreciation and amortization			1,827		99		228		2,154		135		―		2,289
Equity in earnings of unconsolidated affiliates			(5)		134		14		143		5		―		148
Income tax expense (benefit)			942		149		(8)		1,083		(378)		―		705
Segment income(a)(b)			1,744		439		87		2,270		(538)		―		1,732
Add back noncontrolling interest component															14
Income from discontinued operations, net of tax															36
Net income														$	1,782
Capital investments expenditures and acquisitions		$	4,220	$	551	$	1,038	$	5,809	$	149	$	―	$	5,958
Segment assets			98,162		5,406		6,992		110,560		3,126		170		113,856
(a)	Regulated Utilities recorded charges related to Duke Energy Indiana's IGCC project. See Note 4 for additional information about these charges. Regulated Utilities also recorded the reversal of expenses of $60 million related to a prior year Voluntary Opportunity Plan in accordance with Duke Energy Carolinas' 2011 rate case. See Note 19 for additional information about these expenses.
(b)	Other includes after-tax costs to achieve the merger with Progress Energy. See Notes 2 and 25 for additional information about the merger and related costs.

		Year Ended December 31, 2011
		Regulated		International		Commercial Power		Total Reportable
(in millions)		Utilities		Energy		Energy		Segments(a)		Other		Eliminations		Total
Unaffiliated revenues		$	10,586	$	1,467	$	2,480	$	14,533	$	(4)	$	―	$	14,529
Intersegment revenues			33		―		11		44		48		(92)		―
	Total revenues	$	10,619	$	1,467	$	2,491	$	14,577	$	44	$	(92)	$	14,529
Interest expense		$	568	$	47	$	87	$	702	$	157	$	―	$	859
Depreciation and amortization			1,383		90		230		1,703		103		―		1,806
Equity in earnings of unconsolidated affiliates			―		145		6		151		9		―		160
Income tax expense (benefit)			674		196		(2)		868		(116)		―		752
Segment income(a)(b)			1,181		466		134		1,781		(76)		―		1,705
Add back noncontrolling interest component															8
Income from discontinued operations, net of tax															1
Net income														$	1,714
Capital investments expenditures and acquisitions		$	3,717	$	114	$	492	$	4,323	$	141	$	―	$	4,464
Segment assets			47,977		4,539		6,939		59,455		2,961		110		62,526
(a)	Regulated Utilities recorded charges related to Duke Energy Indiana's IGCC project. See Note 4 for additional information about these charges.
(b)	Commercial Power recorded charges to write-down the carrying value of certain emission allowances. See Note 11 for additional information about these charges.

Schedule Of Revenue And Long-Lived Assets, By Geographical Area

The following table includes information by geographic segment.
(in millions)		U.S.		Latin America(a)		Consolidated
2013
Consolidated revenues		$	23,053	$	1,545	$	24,598
Consolidated long-lived assets			78,581		2,781		81,362
2012
Consolidated revenues		$	18,078	$	1,546	$	19,624
Consolidated long-lived assets			79,144		2,467		81,611
2011
Consolidated revenues		$	13,062	$	1,467	$	14,529
Consolidated long-lived assets			45,920		2,612		48,532
(a)	Change in amounts of long-lived assets in Latin America includes foreign currency translation adjustments on property, plant and equipment and other long-lived asset balances.

Schedule of Net Loss for Other Segment

	Years Ended December 31,
(in millions)	2013			2012	2011
Duke Energy Carolinas	$	(97)	$	(169)	$	(46)
Progress Energy		(241)		(379)		(273)
Duke Energy Progress		(46)		(139)		(18)
Duke Energy Florida		(24)		(58)		(16)
Duke Energy Indiana		(16)		(27)		(12)

Duke Energy Ohio [Member]

Segment Reporting Information [Line Items]

Business Segment Data

		Year Ended December 31, 2013
(in millions)		Regulated Utilities		Commercial Power		Total Reportable Segments		Other		Eliminations		Total
Unaffiliated revenues(a)		$	1,765	$	1,480	$	3,245	$	―	$	―	$	3,245
Intersegment revenues			―		32		32		―		(32)		―
	Total revenues	$	1,765	$	1,512	$	3,277	$	―	$	(32)	$	3,245
Interest expense		$	74	$	4	$	78	$	―	$	―	$	78
Depreciation and amortization			200		154		354		―		―		354
Income tax expense (benefit)			91		(14)		77		(2)		―		75
Segment income/consolidated net income			151		(20)		131		(29)		―		102
Capital expenditures			375		58		433		―		―		433
Segment assets			6,649		4,170		10,819		99		(155)		10,763
(a)	Duke Energy Ohio earned approximately 37 percent of its consolidated operating revenues from PJM Interconnection, LLC (PJM) in 2013, all of which is included in the Commercial Power segment. These revenues relate to the sale of capacity and electricity from Commercial Power's nonregulated generation assets.

		Year Ended December 31, 2012
(in millions)		Regulated Utilities		Commercial Power		Total Reportable Segments		Other		Eliminations		Total
Unaffiliated revenues(a)		$	1,745	$	1,407	$	3,152	$	―	$	―	$	3,152
Intersegment revenues			1		51		52		―		(52)		―
	Total revenues	$	1,746	$	1,458	$	3,204	$	―	$	(52)	$	3,152
Interest expense		$	61	$	28	$	89	$	―	$	―	$	89
Depreciation and amortization			179		159		338		―		―		338
Income tax expense (benefit)			91		25		116		(18)		―		98
Segment income/consolidated net income			159		50		209		(34)		―		175
Capital expenditures			427		87		514		―		―		514
Segment assets			6,434		4,175		10,609		117		(166)		10,560
(a)	Duke Energy Ohio earned approximately 36 percent of its consolidated operating revenues from PJM in 2012, all of which is included in the Commercial Power segment. These revenues relate to the sale of capacity and electricity from Commercial Power's nonregulated generation assets.

		Year Ended December 31, 2011
(in millions)		Regulated Utilities		Commercial Power		Total Reportable Segments		Other		Eliminations		Total
Unaffiliated revenues(a)		$	1,474	$	1,707	$	3,181	$	―	$	―	$	3,181
Intersegment revenues			―		4		4		―		(4)		―
	Total revenues	$	1,474	$	1,711	$	3,185	$	―	$	(4)	$	3,181
Interest expense		$	68	$	36	$	104	$	―	$	―	$	104
Depreciation and amortization			168		167		335		―		―		335
Income tax expense (benefit)			98		6		104		(8)		―		96
Segment income/consolidated net income(b)			133		78		211		(17)		―		194
Capital expenditures			375		124		499		―		―		499
Segment assets			6,293		4,740		11,033		259		(353)		10,939
(a)	Duke Energy Ohio earned approximately 24 percent of its consolidated operating revenues from PJM in 2011, all of which is included in the Commercial Power segment. These revenues relate to the sale of capacity and electricity from Commercial Power's nonregulated generation assets.
(b)	Commercial Power recorded charges during the year ended December 31, 2011, to write-down the carrying value of certain emission allowances. See Note 11 for additional information.