XML 139 R96.htm IDEA: XBRL DOCUMENT v3.6.0.2
LONG-TERM DEBT - Schedule of Long-term Debt Maturities (Details)
$ in Millions
Dec. 31, 2016
USD ($)
Debt Instrument [Line Items]  
2017 $ 745.0
2018 960.0
2019 800.0
2020 295.0
2021 871.3
Thereafter 5,665.3
Total 9,336.6
The Connecticut Light And Power Company [Member]  
Debt Instrument [Line Items]  
2017 250.0
2018 300.0
2019 250.0
2020 0.0
2021 0.0
Thereafter 1,990.3
Total 2,790.3
NSTAR Electric Company [Member]  
Debt Instrument [Line Items]  
2017 400.0
2018 0.0
2019 0.0
2020 0.0
2021 0.0
Thereafter 1,700.0
Total 2,100.0
Public Service Company Of New Hampshire [Member]  
Debt Instrument [Line Items]  
2017 70.0
2018 110.0
2019 150.0
2020 0.0
2021 371.3
Thereafter 375.0
Total 1,076.3
Western Massachusetts Electric Company [Member]  
Debt Instrument [Line Items]  
2017 0.0
2018 0.0
2019 0.0
2020 95.0
2021 250.0
Thereafter 220.0
Total $ 565.0