|
Segment Information (Details Textuals) (USD $)
In Millions, unless otherwise specified |
6 Months Ended | |
|---|---|---|
|
Jun. 30, 2011
|
Sep. 30, 2012
customers
|
|
| Entity Information [Line Items] | ||
| Number of Electric Utility Customers | 2,100,000 | |
| Number of Gas Utility Customers | 1,200,000 | |
| Number of Citizens Gas Customers | 17,000 | |
| Current State and Local Tax Expense (Benefit) | $ 88 |