XML 52 R38.htm IDEA: XBRL DOCUMENT v3.4.0.3
Debt (Details)
3 Months Ended
Apr. 28, 2016
USD ($)
Apr. 21, 2016
USD ($)
Mar. 31, 2016
USD ($)
Feb. 20, 2014
USD ($)
item
Debt        
Repayments of commercial paper   $ 129,737,500    
Facility        
Debt        
Number of future advance promissory notes | item       2
Aggregate borrowings including capitalized interest     $ 1,191,234,000  
Facility | Maximum        
Debt        
Aggregate borrowings       $ 3,057,069,461
Capitalized interest       $ 335,471,604
Rural Utilities Service Guaranteed Loans        
Debt        
Additional advances $ 74,435,000   $ 7,998,000  
First Mortgage Bonds Series 2016A        
Debt        
Principal amount   $ 250,000,000    
Interest rate (as a percent)   4.25%