Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract]
Net Income	$ 748	$ 502	$ 1,641	$ 1,124
Other Comprehensive (Loss) Income, net of tax
Pension and OPEB adjustments	3	1	3	2
Net unrealized (losses) gains on cash flow hedges	(29)	1	(46)	13
Reclassification into earnings from cash flow hedges	2	(2)	3	(1)
Unrealized gains (losses) on available-for-sale securities	4	(2)	8	(5)
Other Comprehensive (Loss) Income, net of tax	(20)	(2)	(32)	9
Comprehensive Income	728	500	1,609	1,133
Less: Comprehensive (Loss) Income Attributable to Noncontrolling Interests	(84)	2	(91)	4
Less: Preferred Dividends	12		12
Comprehensive Income Attributable to Duke Energy Corporation	$ 800	$ 498	$ 1,688	$ 1,129

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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