SHARE-BASED PAYMENTS (Tables)

12 Months Ended

Dec. 31, 2018

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Disclosure of Share-based Compensation Arrangements by Share-based Payment

The total compensation expense and associated future income tax benefits recognized by Eversource, CL&P, NSTAR Electric and PSNH for share-based compensation awards were as follows:

Eversource	For the Years Ended December 31,
(Millions of Dollars)	2018		2017		2016
Compensation Expense	$	21.4	$	19.7	$	23.6
Future Income Tax Benefit	5.4		8.0		9.6

	For the Years Ended December 31,
	2018						2017						2016
(Millions of Dollars)	CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH
Compensation Expense	$	7.8	$	7.7	$	2.9	$	7.0	$	7.0	$	3.2	$	9.1	$	8.2	$	3.5
Future Income Tax Benefit	2.0		1.9		0.7		2.9		2.8		1.3		3.7		3.3		1.4

Restricted Stock Units (RSUs)

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary of Share Transactions

A summary of RSU transactions is as follows:

	RSUs (Units)		Weighted Average Grant-Date Fair Value
Outstanding as of December 31, 2017	717,039		$	49.29
Granted	286,315		$	56.69
Shares Issued	(201,386	)	$	55.35
Forfeited	(19,603	)	$	56.78
Outstanding as of December 31, 2018	782,365		$	50.25

Performance Shares

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary of Share Transactions

A summary of performance share transactions is as follows:

	Performance Shares (Units)		Weighted Average Grant-Date Fair Value
Outstanding as of December 31, 2017	510,565		$	55.45
Granted	184,355		$	56.77
Shares Issued	(178,258	)	$	54.98
Forfeited	(17,098	)	$	56.18
Outstanding as of December 31, 2018	499,564		$	56.08