|
Employee Benefit Plans (Components of Net Periodic Pension Costs) (Details) (USD $)
In Millions, unless otherwise specified
|
3 Months Ended |
9 Months Ended |
|
Sep. 30, 2014
|
Sep. 30, 2013
|
Sep. 30, 2014
|
Sep. 30, 2013
|
|
Qualified Pension Plans [Member]
|
|
|
|
|
| Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] |
|
|
|
|
| Service cost |
$ 34 |
$ 41 |
$ 102 |
$ 125 |
| Interest cost on projected benefit obligation |
86 |
80 |
258 |
240 |
| Expected return on plan assets |
(128) |
(137) |
(383) |
(411) |
| Amortization of actuarial loss (gain) |
37 |
61 |
111 |
183 |
| Amortization of prior service cost (credit) |
(4) |
(2) |
(11) |
(8) |
| Other |
3 |
2 |
6 |
5 |
| Net periodic costs |
28 |
45 |
83 |
134 |
|
Qualified Pension Plans [Member] | Duke Energy Carolinas [Member]
|
|
|
|
|
| Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] |
|
|
|
|
| Service cost |
10 |
12 |
31 |
37 |
| Interest cost on projected benefit obligation |
22 |
20 |
64 |
60 |
| Expected return on plan assets |
(33) |
(37) |
(99) |
(111) |
| Amortization of actuarial loss (gain) |
8 |
15 |
26 |
45 |
| Amortization of prior service cost (credit) |
(2) |
(2) |
(6) |
(5) |
| Other |
1 |
1 |
2 |
2 |
| Net periodic costs |
6 |
9 |
18 |
28 |
|
Qualified Pension Plans [Member] | Progress Energy [Member]
|
|
|
|
|
| Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] |
|
|
|
|
| Service cost |
10 |
15 |
30 |
45 |
| Interest cost on projected benefit obligation |
28 |
29 |
84 |
87 |
| Expected return on plan assets |
(44) |
(50) |
(130) |
(149) |
| Amortization of actuarial loss (gain) |
17 |
26 |
51 |
76 |
| Amortization of prior service cost (credit) |
|
(1) |
(2) |
(3) |
| Other |
1 |
|
2 |
1 |
| Net periodic costs |
12 |
19 |
35 |
57 |
|
Qualified Pension Plans [Member] | Duke Energy Progress [Member]
|
|
|
|
|
| Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] |
|
|
|
|
| Service cost |
6 |
6 |
16 |
17 |
| Interest cost on projected benefit obligation |
13 |
13 |
40 |
38 |
| Expected return on plan assets |
(21) |
(24) |
(64) |
(71) |
| Amortization of actuarial loss (gain) |
8 |
11 |
24 |
34 |
| Amortization of prior service cost (credit) |
|
(1) |
(1) |
(1) |
| Other |
|
1 |
1 |
1 |
| Net periodic costs |
6 |
6 |
16 |
18 |
|
Qualified Pension Plans [Member] | Duke Energy Florida [Member]
|
|
|
|
|
| Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] |
|
|
|
|
| Service cost |
5 |
8 |
15 |
23 |
| Interest cost on projected benefit obligation |
14 |
13 |
43 |
40 |
| Expected return on plan assets |
(21) |
(21) |
(64) |
(65) |
| Amortization of actuarial loss (gain) |
8 |
12 |
24 |
37 |
| Amortization of prior service cost (credit) |
|
(1) |
(1) |
(2) |
| Other |
|
|
1 |
|
| Net periodic costs |
6 |
11 |
18 |
33 |
|
Qualified Pension Plans [Member] | Duke Energy Ohio [Member]
|
|
|
|
|
| Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] |
|
|
|
|
| Service cost |
1 |
1 |
3 |
4 |
| Interest cost on projected benefit obligation |
5 |
5 |
15 |
16 |
| Expected return on plan assets |
(7) |
(7) |
(20) |
(22) |
| Amortization of actuarial loss (gain) |
1 |
3 |
3 |
9 |
| Amortization of prior service cost (credit) |
|
|
|
|
| Other |
|
|
|
|
| Net periodic costs |
0 |
2 |
1 |
7 |
|
Qualified Pension Plans [Member] | Duke Energy Indiana [Member]
|
|
|
|
|
| Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] |
|
|
|
|
| Service cost |
3 |
2 |
7 |
8 |
| Interest cost on projected benefit obligation |
7 |
7 |
22 |
21 |
| Expected return on plan assets |
(10) |
(11) |
(30) |
(33) |
| Amortization of actuarial loss (gain) |
3 |
6 |
9 |
17 |
| Amortization of prior service cost (credit) |
|
|
|
|
| Other |
|
1 |
|
1 |
| Net periodic costs |
3 |
5 |
8 |
14 |
|
Non-Qualified Pension Plans [Member]
|
|
|
|
|
| Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] |
|
|
|
|
| Service cost |
1 |
1 |
2 |
2 |
| Interest cost on projected benefit obligation |
3 |
3 |
10 |
10 |
| Amortization of actuarial loss (gain) |
1 |
1 |
2 |
4 |
| Amortization of prior service cost (credit) |
|
|
|
(1) |
| Net periodic costs |
5 |
5 |
14 |
15 |
|
Non-Qualified Pension Plans [Member] | Duke Energy Carolinas [Member]
|
|
|
|
|
| Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] |
|
|
|
|
| Service cost |
|
|
|
|
| Interest cost on projected benefit obligation |
1 |
|
1 |
1 |
| Amortization of actuarial loss (gain) |
|
|
|
|
| Amortization of prior service cost (credit) |
|
|
|
|
| Net periodic costs |
1 |
0 |
1 |
1 |
|
Non-Qualified Pension Plans [Member] | Progress Energy [Member]
|
|
|
|
|
| Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] |
|
|
|
|
| Service cost |
|
1 |
1 |
1 |
| Interest cost on projected benefit obligation |
2 |
1 |
4 |
5 |
| Amortization of actuarial loss (gain) |
|
1 |
1 |
3 |
| Amortization of prior service cost (credit) |
(1) |
|
(1) |
(1) |
| Net periodic costs |
1 |
3 |
5 |
8 |
|
Non-Qualified Pension Plans [Member] | Duke Energy Progress [Member]
|
|
|
|
|
| Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] |
|
|
|
|
| Service cost |
1 |
1 |
1 |
1 |
| Interest cost on projected benefit obligation |
|
|
1 |
1 |
| Amortization of actuarial loss (gain) |
|
1 |
|
1 |
| Amortization of prior service cost (credit) |
|
|
|
|
| Net periodic costs |
1 |
2 |
2 |
3 |
|
Non-Qualified Pension Plans [Member] | Duke Energy Florida [Member]
|
|
|
|
|
| Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] |
|
|
|
|
| Service cost |
|
|
|
|
| Interest cost on projected benefit obligation |
|
|
1 |
1 |
| Amortization of actuarial loss (gain) |
|
1 |
|
1 |
| Amortization of prior service cost (credit) |
|
|
|
|
| Net periodic costs |
0 |
1 |
1 |
2 |
|
Other Post-Retirement Benefit Plans [Member]
|
|
|
|
|
| Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] |
|
|
|
|
| Service cost |
2 |
7 |
7 |
21 |
| Interest cost on projected benefit obligation |
13 |
19 |
38 |
55 |
| Expected return on plan assets |
(3) |
(4) |
(9) |
(11) |
| Amortization of actuarial loss (gain) |
9 |
13 |
29 |
39 |
| Amortization of prior service cost (credit) |
(31) |
(3) |
(94) |
(9) |
| Net periodic costs |
(10) |
32 |
(29) |
95 |
|
Other Post-Retirement Benefit Plans [Member] | Duke Energy Carolinas [Member]
|
|
|
|
|
| Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] |
|
|
|
|
| Service cost |
|
1 |
1 |
2 |
| Interest cost on projected benefit obligation |
3 |
3 |
9 |
9 |
| Expected return on plan assets |
(2) |
(2) |
(6) |
(7) |
| Amortization of actuarial loss (gain) |
1 |
|
2 |
2 |
| Amortization of prior service cost (credit) |
(3) |
(2) |
(8) |
(6) |
| Net periodic costs |
(1) |
0 |
(2) |
0 |
|
Other Post-Retirement Benefit Plans [Member] | Progress Energy [Member]
|
|
|
|
|
| Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] |
|
|
|
|
| Service cost |
1 |
6 |
3 |
17 |
| Interest cost on projected benefit obligation |
6 |
12 |
17 |
35 |
| Expected return on plan assets |
|
|
|
|
| Amortization of actuarial loss (gain) |
10 |
13 |
31 |
42 |
| Amortization of prior service cost (credit) |
(24) |
|
(71) |
(1) |
| Net periodic costs |
(7) |
31 |
(20) |
93 |
|
Other Post-Retirement Benefit Plans [Member] | Duke Energy Progress [Member]
|
|
|
|
|
| Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] |
|
|
|
|
| Service cost |
|
3 |
1 |
9 |
| Interest cost on projected benefit obligation |
3 |
7 |
8 |
19 |
| Expected return on plan assets |
|
|
|
|
| Amortization of actuarial loss (gain) |
8 |
8 |
23 |
26 |
| Amortization of prior service cost (credit) |
(19) |
|
(55) |
(1) |
| Net periodic costs |
(8) |
18 |
(23) |
53 |
|
Other Post-Retirement Benefit Plans [Member] | Duke Energy Florida [Member]
|
|
|
|
|
| Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] |
|
|
|
|
| Service cost |
|
2 |
2 |
6 |
| Interest cost on projected benefit obligation |
3 |
5 |
9 |
13 |
| Expected return on plan assets |
|
|
|
|
| Amortization of actuarial loss (gain) |
3 |
4 |
8 |
12 |
| Amortization of prior service cost (credit) |
(5) |
|
(16) |
|
| Net periodic costs |
1 |
11 |
3 |
31 |
|
Other Post-Retirement Benefit Plans [Member] | Duke Energy Ohio [Member]
|
|
|
|
|
| Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] |
|
|
|
|
| Service cost |
|
|
|
|
| Interest cost on projected benefit obligation |
|
|
1 |
1 |
| Expected return on plan assets |
|
|
|
|
| Amortization of actuarial loss (gain) |
|
|
(1) |
(1) |
| Amortization of prior service cost (credit) |
|
|
|
|
| Net periodic costs |
|
|
0 |
0 |
|
Other Post-Retirement Benefit Plans [Member] | Duke Energy Indiana [Member]
|
|
|
|
|
| Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] |
|
|
|
|
| Service cost |
|
1 |
|
1 |
| Interest cost on projected benefit obligation |
1 |
1 |
4 |
4 |
| Expected return on plan assets |
|
(1) |
(1) |
(1) |
| Amortization of actuarial loss (gain) |
|
1 |
|
1 |
| Amortization of prior service cost (credit) |
|
|
|
|
| Net periodic costs |
$ 1 |
$ 2 |
$ 3 |
$ 5 |