Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Receivables (net of allowance for doubtful accounts)	$ 14	$ 12
Receivables of VIEs (net of allowance for doubtful accounts)	54	53
Regulatory assets	1,023	877
Other	458	307
Regulatory assets	12,878	11,373
Current maturities of long-term debt	2,319	2,026
Long-Term Debt	$ 45,576	$ 36,842
Common stock, par or stated value	$ 0.001	$ 0.001
Common stock, shares authorized	2,000,000,000	2,000,000,000
Common stock, shares outstanding	700,000,000	688,000,000
Duke Energy Carolinas [Member]
Receivables (net of allowance for doubtful accounts)	$ 2	$ 3
Receivables of VIEs (net of allowance for doubtful accounts)	7	7
Regulatory assets	238	305
Other	37	128
Regulatory assets	3,159	2,766
Current maturities of long-term debt	116	356
Long-Term Debt	9,187	7,711
Progress Energy [Member]
Receivables (net of allowance for doubtful accounts)	6	6
Receivables of VIEs (net of allowance for doubtful accounts)	7	8
Regulatory assets	401	362
Other	148	156
Regulatory assets	5,722	5,435
Current maturities of long-term debt	778	315
Long-Term Debt	$ 15,590	$ 13,999
Common stock, par or stated value	$ 0.01	$ 0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares outstanding	100,000,000	100,000,000
Duke Energy Progress [Member]
Receivables (net of allowance for doubtful accounts)	$ 4	$ 4
Receivables of VIEs (net of allowance for doubtful accounts)	5	5
Regulatory assets	188	264
Other	57	121
Regulatory assets	3,243	2,710
Current maturities of long-term debt	452	2
Long-Term Debt	6,409	6,366
Duke Energy Florida [Member]
Receivables (net of allowance for doubtful accounts)	2	2
Receivables of VIEs (net of allowance for doubtful accounts)	2	3
Regulatory assets	213	98
Other	125	21
Regulatory assets	2,480	2,725
Current maturities of long-term debt	326	13
Long-Term Debt	5,799	4,253
Duke Energy Ohio [Member]
Receivables (net of allowance for doubtful accounts)	2	2
Regulatory assets	37	36
Other	37	110
Regulatory assets	520	497
Current maturities of long-term debt	1	106
Long-Term Debt	$ 1,858	$ 1,467
Common stock, par or stated value	$ 8.50	$ 8.50
Common stock, shares authorized	120,000,000	120,000,000
Common stock, shares outstanding	89,663,086	89,663,086
Duke Energy Indiana [Member]
Receivables (net of allowance for doubtful accounts)	$ 1	$ 1
Regulatory assets	149	102
Other	45	15
Regulatory assets	1,073	716
Current maturities of long-term debt	3	547
Long-Term Debt	$ 3,633	$ 3,071
Common stock, par or stated value	$ 0.01	$ 0.01
Common stock, shares authorized	60,000,000	60,000,000
Common stock, shares outstanding	53,913,701	53,913,701
Variable Interest Entity [Member]
Regulatory assets	$ 50
Regulatory assets	1,142
Current maturities of long-term debt	260	$ 125
Long-Term Debt	3,587	2,197
Variable Interest Entity [Member] | Progress Energy [Member]
Regulatory assets	50
Regulatory assets	1,142
Current maturities of long-term debt	62
Long-Term Debt	1,741	479
Variable Interest Entity [Member] | Duke Energy Florida [Member]
Regulatory assets	50
Other	53
Regulatory assets	1,142
Current maturities of long-term debt	62
Long-Term Debt	$ 1,442	$ 225