Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract]
Net income		$ 1,234	$ 1,323	$ 1,232	$ 2,964
Other Comprehensive Loss, net of tax
Pension and OPEB adjustments	[1]	1	(2)	1	1
Net unrealized losses on cash flow hedges	[1]	(83)	(16)	(159)	(62)
Reclassification into earnings from cash flow hedges	[1]	4	1	8	4
Unrealized (losses) gains on available-for-sale securities	[1]	(2)	2	5	10
Other Comprehensive Loss, net of tax	[1]	(80)	(15)	(145)	(47)
Comprehensive Income		1,154	1,308	1,087	2,917
Add: Comprehensive Loss Attributable to Noncontrolling Interests		70	19	220	110
Comprehensive Income Attributable to Duke Energy		1,224	1,327	1,307	3,027
Less: Preferred Dividends		39	15	93	27
Comprehensive Income Available to Duke Energy Corporation Common Stockholders		$ 1,185	$ 1,312	$ 1,214	$ 3,000

[1] Net of income tax impacts of approximately $24 million for the three months ended September 30, 2020, and $43 million and $14 million for the nine months ended September 30, 2020, and 2019, respectively. All other periods presented include immaterial income tax impacts.