XML 29 R56.htm IDEA: XBRL DOCUMENT v2.4.0.8
Rate Matters and Regulation Rate Matters and Regulation (Details) (USD $)
3 Months Ended
Jun. 30, 2014
Section 206 Complaint [Member]
 
Reduction of Revenue $ 1,000,000
Regional Haze [Member]
 
Estimated Environmental Capital Costs $ 1,100,000,000