SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

3 Months Ended

Mar. 31, 2017

Accounting Policies [Abstract]

Schedule of Accounts, Notes, Loans and Financing Receivable

The total provision for uncollectible accounts and for uncollectible hardship accounts, which is included in the total provision, is included in Receivables, Net on the balance sheets, and was as follows:

	Total Provision for Uncollectible Accounts				Uncollectible Hardship
(Millions of Dollars)	As of March 31, 2017		As of December 31, 2016		As of March 31, 2017		As of December 31, 2016
Eversource	$	203.2	$	200.6	$	118.0	$	119.9
CL&P	88.7		86.4		69.8		67.7
NSTAR Electric	52.6		54.8		23.7		26.2
PSNH	10.4		9.9		—		—
WMECO	14.2		15.5		8.2		9.9

State Of Connecticut Gross Earnings Taxes

These gross receipts taxes are shown separately with collections in Operating Revenues and with payments in Taxes Other Than Income Taxes on the statements of income as follows:

	For the Three Months Ended
(Millions of Dollars)	March 31, 2017		March 31, 2016
Eversource	$	42.2	$	42.2
CL&P	33.9		36.0

Schedule of Supplemental Cash Flow Information

Non-cash investing activities include plant additions included in Accounts Payable as follows:

(Millions of Dollars)	As of March 31, 2017		As of March 31, 2016
Eversource	$	220.5	$	125.6
CL&P	104.2		52.6
NSTAR Electric	29.8		11.7
PSNH	28.7		26.8
WMECO	19.6		10.7