Consolidated Statements of Comprehensive Income - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income		$ 3,579	$ 1,082	$ 3,571
Other Comprehensive Income, net of tax
Pension and OPEB adjustments	[1]	7	6	9
Net unrealized losses on cash flow hedges	[1]	(68)	(138)	(47)
Reclassification into earnings from cash flow hedges	[1]	13	11	6
Unrealized (losses) gains on available-for-sale securities	[1]	(8)	3	8
Other Comprehensive Loss, net of tax	[1]	(56)	(118)	(24)
Comprehensive Income		3,523	964	3,547
Add: Comprehensive Loss Attributable to Noncontrolling Interests		319	306	177
Comprehensive Income Attributable to Duke Energy Corporation		3,842	1,270	3,724
Less: Preferred Dividends		106	107	41
Comprehensive Income Available to Duke Energy Corporation Common Stockholders		$ 3,736	$ 1,163	$ 3,683

[1] Net of income tax impacts of approximately $17 million and $35 million for the years ended December 31, 2021, and 2020, respectively. Tax impacts are immaterial for other periods presented.