Acquisitions and Dispositions (Tables)

9 Months Ended

Sep. 30, 2016

Business Combinations [Abstract]

Schedule of Business Acquisitions, by Acquisition [Table Text Block]

The preliminary purchase price allocation of the Piedmont acquisition is estimated as follows:

(in millions)
Current assets	$	500
Property, plant and equipment, net	4,710
Goodwill	3,380
Other long-term assets	810
Total assets	9,400
Current liabilities, including current maturities of long-term debt	590
Long-term liabilities	1,810
Long-term debt	2,000
Total liabilities	4,400
Total purchase price	$	5,000

Income Statement Disclosures

The following table presents the results of discontinued operations for the three and nine months ended September 30, 2015.

	Three Months Ended						Nine Months Ended
	September 30, 2015						September 30, 2015
				Duke						Duke
	Duke			Energy			Duke			Energy
(in millions)	Energy			Ohio			Energy			Ohio
Operating Revenues	$	—		$	—		$	543		$	412
Loss on disposition	(5		)	(4		)	(42		)	(48		)
(Loss) Income before income taxes(a)	$	(5	)	$	(4	)	$	62		$	48
Income tax (benefit) expense	(1		)	(2		)	29			25
(Loss) Income from discontinued operations of the Midwest Generation Disposal Group	(4		)	(2		)	33			23
Other, net of tax(b)	(1		)	—			(4		)	—
(Loss) Income From Discontinued Operations, net of tax	$	(5	)	$	(2	)	$	29		$	23

(a) The (Loss) Income before income taxes includes the pretax impact of an $81 million charge for the agreement in principle reached in a lawsuit related to the Midwest Generation Disposal Group for the nine months ended September 30, 2015. Refer to Note 5 for further information related to the lawsuit.

(b) Relates to discontinued operations of businesses not related to the Midwest Generation Disposal Group and includes indemnifications provided for certain legal, tax and environmental matters, and foreign currency translation adjustments.

Business Acquisition, Pro Forma Information [Table Text Block]

The following unaudited pro forma financial information reflects the combined results of operations of Duke Energy and Piedmont. The unaudited pro forma financial information has been presented for illustrative purposes only and is not necessarily indicative of the consolidated results of operations that would have been achieved or the future consolidated results of operations of Duke Energy. This information is preliminary in nature and subject to change.

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
(in millions)	2016		2015		2016		2015
Revenues	$	6,958	$	6,627	$	18,688	$	19,021
Net income attributable to Duke Energy Corporation	1,180		897		2,552		2,352