XML 146 R94.htm IDEA: XBRL DOCUMENT v3.8.0.1
LONG-TERM DEBT - Schedule of Long-term Debt Maturities (Details)
$ in Millions
Dec. 31, 2017
USD ($)
Debt Instrument [Line Items]  
2018 $ 961.0
2019 801.0
2020 296.1
2021 922.8
2022 1,188.9
Thereafter 7,643.1
Total 11,812.9
The Connecticut Light And Power Company  
Debt Instrument [Line Items]  
2018 300.0
2019 250.0
2020 0.0
2021 0.0
2022 0.0
Thereafter 2,515.3
Total 3,065.3
NSTAR Electric Company  
Debt Instrument [Line Items]  
2018 0.0
2019 0.0
2020 95.0
2021 250.0
2022 400.0
Thereafter 2,220.0
Total 2,965.0
Public Service Company Of New Hampshire  
Debt Instrument [Line Items]  
2018 110.0
2019 150.0
2020 0.0
2021 371.3
2022 0.0
Thereafter 375.0
Total $ 1,006.3