Condensed Consolidated Statements of Operations and Comprehensive Income - Piedmont - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Regulated natural gas	$ 2,152	$ 2,724	$ 2,008
Nonregulated electric and other	291	285	294
Total operating revenues	29,060	28,768	24,621
Operating Expenses
Operation, maintenance and other	5,625	5,734	5,703
Depreciation and amortization	5,253	5,086	4,762
Property and other taxes	1,400	1,466	1,355
Impairment of assets and other charges	85	434	353
Total operating expenses	22,042	22,778	19,133
Gains on Sales of Other Assets and Other, net	52	22	12
Operating Income	7,070	6,012	5,500
Equity in earnings of unconsolidated affiliates	113	113	62
Other income and expenses, net	598	392	636
Total other income and expenses	711	505	698
Interest Expense	3,014	2,439	2,207
Income From Continuing Operations Before Income Taxes	4,767	4,078	3,991
Income Tax Expense From Continuing Operations	438	300	268
Net Income Attributable to Duke Energy Corporation	2,841	2,550	3,908
Comprehensive Income Attributable to Duke Energy Corporation	2,975	2,713	3,842
Piedmont
Regulated natural gas	1,603	2,100	1,555
Nonregulated electric and other	25	24	14
Total operating revenues	1,628	2,124	1,569
Operating Expenses
Cost of natural gas	430	1,015	569
Operation, maintenance and other	344	368	327
Depreciation and amortization	237	222	213
Property and other taxes	59	57	55
Impairment of assets and other charges	(4)	18	10
Total operating expenses	1,066	1,680	1,174
Gains on Sales of Other Assets and Other, net	0	4	0
Operating Income	562	448	395
Equity in earnings of unconsolidated affiliates	9	8	9
Other income and expenses, net	57	46	55
Total other income and expenses	66	54	64
Interest Expense	165	140	119
Income From Continuing Operations Before Income Taxes	463	362	340
Income Tax Expense From Continuing Operations	84	39	30
Net Income Attributable to Duke Energy Corporation	379	323	310
Comprehensive Income Attributable to Duke Energy Corporation	$ 379	$ 323	$ 310