XML 57 R45.htm IDEA: XBRL DOCUMENT v3.10.0.1
Major Accounting Policies - Research and Development (Details) - Nu Scale Power - Cost-sharing agreement, research and development activities
$ in Millions
1 Months Ended
May 31, 2014
USD ($)
Research and Development  
Recovery of Direct Costs $ 217
Cost reimbursement (as a percent) 43.00%