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Debt
 3 Months Ended
Mar. 31, 2018
Debt Disclosure [Abstract]  
Debt
Debt

Significant long-term debt issuances and borrowings during the three months ended March 31, 2018 were as follows:
 
Principal Amount
 
Interest Rate
 
Maturity Date
 
(millions)
 
 
 
 
FPL - First mortgage bonds
$
1,000

 
3.95
%
 
2048
NEECH - Debentures
$
800

 
Variable

(a) 
2019
———————————————
(a)
Variable rate is based on an underlying index plus a margin.