MARKETABLE SECURITIES (Tables)

12 Months Ended

Dec. 31, 2017

Investments, Debt and Equity Securities [Abstract]

Schedule of Available-for-sale Securities Reconciliation

The following is a summary of available-for-sale securities, which are recorded at fair value and are included in current and long-term Marketable Securities on the balance sheets.



	As of December 31,
	2017									2016
Eversource (Millions of Dollars)	Amortized Cost		Pre-Tax Unrealized Gains		Pre-Tax Unrealized Losses			Fair Value		Amortized Cost		Pre-Tax Unrealized Gains		Pre-Tax Unrealized Losses			Fair Value
Debt Securities	$	284.9	$	3.2	$	(1.1	)	$	287.0	$	296.2	$	1.1	$	(2.1	)	$	295.2
Equity Securities	216.1		97.8		(0.1		)	313.8		203.3		62.3		(1.2		)	264.4

Investments Classified by Contractual Maturity Date

As of December 31, 2017, the contractual maturities of available-for-sale debt securities were as follows:



Eversource (Millions of Dollars)	Amortized Cost		Fair Value
Eversource (Millions of Dollars)	Amortized Cost		Fair Value
Less than one year ⁽¹⁾	$	40.2	$	40.1
One to five years	46.7		47.5
Six to ten years	64.7		65.6
Greater than ten years	133.3		133.8
Total Debt Securities	$	284.9	$	287.0


(1)	Amounts in the Less than one year category include securities in the CYAPC and YAEC nuclear decommissioning trusts, which are restricted and are classified in long-term Marketable Securities on the balance sheets.

Marketable Securities Recorded at Fair Value

The following table presents the marketable securities recorded at fair value on a recurring basis by the level in which they are classified within the fair value hierarchy:



Eversource (Millions of Dollars)	As of December 31,
Eversource (Millions of Dollars)	2017		2016
Level 1:
Mutual Funds and Equities	$	313.8	$	274.0
Money Market Funds	23.3		54.8
Total Level 1	$	337.1	$	328.8
Level 2:
U.S. Government Issued Debt Securities (Agency and Treasury)	$	70.2	$	63.0
Corporate Debt Securities	50.9		41.1
Asset-Backed Debt Securities	21.2		18.5
Municipal Bonds	110.7		107.5
Other Fixed Income Securities	10.7		10.3
Total Level 2	$	263.7	$	240.4
Total Marketable Securities	$	600.8	$	569.2