Severance Expense Table (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012
Restructuring Cost and Reserve [Line Items]
Severance expense	$ 34	[1]	$ 201	[1]
COBRA and healthcare expense reimbursement	2		19
Accelerated stock compensation expense	5		14
Duke Energy Carolinas [Member]
Restructuring Cost and Reserve [Line Items]
Severance expense	8		63
Progress Energy [Member]
Restructuring Cost and Reserve [Line Items]
Severance expense	19		82
Duke Energy Progress [Member]
Restructuring Cost and Reserve [Line Items]
Severance expense	14		55
Duke Energy Florida [Member]
Restructuring Cost and Reserve [Line Items]
Severance expense	5		27
Duke Energy Ohio [Member]
Restructuring Cost and Reserve [Line Items]
Severance expense	2		21
Duke Energy Indiana [Member]
Restructuring Cost and Reserve [Line Items]
Severance expense	$ 2		$ 18

[1] Includes $5 million and $14 million of accelerated stock award expense and $2 million and $19 million of COBRA and healthcare reimbursement expenses for 2013 and 2012, respectively.