Business Segments (Tables)

6 Months Ended

Jun. 30, 2018

Segment Reporting Information [Line Items]

Business Segment Data

Business segment information is presented in the following tables. Segment assets presented exclude intercompany assets.

	Three Months Ended June 30, 2018
	Electric		Gas				Total
	Utilities and		Utilities and		Commercial		Reportable
(in millions)	Infrastructure		Infrastructure		Renewables		Segments		Other			Eliminations			Consolidated
Unaffiliated revenues	$	5,215	$	294	$	119	$	5,628	$	15		$	—		$	5,643
Intersegment revenues	8		24		—		32		17			(49		)	—
Total revenues	$	5,223	$	318	$	119	$	5,660	$	32		$	(49	)	$	5,643
Segment income (loss)(a)(b)	$	575	$	28	$	38	$	641	$	(136	)	$	—		$	505
Add back noncontrolling interests															2
Loss from discontinued operations, net of tax															(5		)
Net income															$	502
Segment assets	$	121,947	$	11,437	$	4,233	$	137,617	$	2,461		$	181		$	140,259

	Three Months Ended June 30, 2017
	Electric		Gas				Total
	Utilities and		Utilities and		Commercial		Reportable
(in millions)	Infrastructure		Infrastructure		Renewables		Segments		Other			Eliminations			Consolidated
Unaffiliated revenues	$	5,150	$	279	$	110	$	5,539	$	16		$	—		$	5,555
Intersegment revenues	8		22		—		30		19			(49		)	—
Total revenues	$	5,158	$	301	$	110	$	5,569	$	35		$	(49	)	$	5,555
Segment income (loss)(b)	$	729	$	27	$	26	$	782	$	(94	)	$	—		$	688
Add back noncontrolling interests															3
Loss from discontinued operations, net of tax															(2		)
Net income															$	689

	Six Months Ended June 30, 2018
	Electric		Gas				Total
	Utilities and		Utilities and		Commercial		Reportable
(in millions)	Infrastructure		Infrastructure		Renewables		Segments		Other			Eliminations			Consolidated
Unaffiliated revenues	$	10,530	$	997	$	220	$	11,747	$	31		$	—		$	11,778
Intersegment revenues	16		48		—		64		36			(100		)	—
Total revenues	$	10,546	$	1,045	$	220	$	11,811	$	67		$	(100	)	$	11,778
Segment income (loss)(a)(b)(c)(d)	$	1,325	$	144	$	58	$	1,527	$	(402	)	$	—		$	1,125
Add back noncontrolling interests															4
Loss from discontinued operations, net of tax															(5		)
Net income															$	1,124

	Six Months Ended June 30, 2017
	Electric		Gas				Total
	Utilities and		Utilities and		Commercial		Reportable
(in millions)	Infrastructure		Infrastructure		Renewables		Segments		Other			Eliminations			Consolidated
Unaffiliated revenues	$	10,090	$	927	$	238	$	11,255	$	29		$	—		$	11,284
Intersegment revenues	15		44		—		59		39			(98		)	—
Total revenues	$	10,105	$	971	$	238	$	11,314	$	68		$	(98	)	$	11,284
Segment income (loss)(b)	$	1,364	$	160	$	51	$	1,575	$	(171	)	$	—		$	1,404
Add back noncontrolling interests															4
Loss from discontinued operations, net of tax															(2		)
Net income															$	1,406

(a) Electric Utilities and Infrastructure includes regulatory and legislative impairment charges related to rate case orders, settlements or other actions of regulators or legislative bodies. See Note 3 for additional information.

(b) Other includes costs to achieve the Piedmont acquisition.

(c) Gas Utilities and Infrastructure includes an impairment of the investment in Constitution Pipeline Company, LLC (Constitution). See Note 3 for additional information.

(d) Other includes the loss on the sale of the retired Beckjord Generating Station (Beckjord) described below and a valuation allowance recorded against the alternative minimum tax credits subject to sequestration. See Note 17 for additional information on the valuation allowance.

Duke Energy Ohio [Member]

Segment Reporting Information [Line Items]

Business Segment Data

	Three Months Ended June 30, 2018
	Electric		Gas		Total
	Utilities and		Utilities and		Reportable
(in millions)	Infrastructure		Infrastructure		Segments		Other			Eliminations			Consolidated
Total revenues	$	346	$	103	$	449	$	10		$	—		$	459
Segment income (loss)/Net income	39		18		57		(11		)	—			46
Segment assets	$	5,336	$	2,727	$	8,063	$	40		$	(2	)	$	8,101

	Three Months Ended June 30, 2017
	Electric		Gas		Total
	Utilities and		Utilities and		Reportable
(in millions)	Infrastructure		Infrastructure		Segments		Other			Consolidated
Total revenues	$	329	$	100	$	429	$	8		$	437
Segment income (loss)/Net income	22		17		39		(9		)	30

	Six Months Ended June 30, 2018
	Electric		Gas		Total
	Utilities and		Utilities and		Reportable
(in millions)	Infrastructure		Infrastructure		Segments		Other			Consolidated
Total revenues	$	682	$	277	$	959	$	24		$	983
Segment income (loss)/Net income(a)	72		52		124		(103		)	21

	Six Months Ended June 30, 2017
	Electric		Gas		Total
	Utilities and		Utilities and		Reportable
(in millions)	Infrastructure		Infrastructure		Segments		Other			Consolidated
Total revenues	$	665	$	270	$	935	$	20		$	955
Segment income (loss)/Net income	46		42		88		(16		)	72

(a)    Other includes the loss on the sale of Beckjord.