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LONG-TERM DEBT (Details) $ in Millions			3 Months Ended
	Apr. 10, 2019 USD ($)	May 22, 2017 USD ($)	Mar. 31, 2019 USD ($)	Jul. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 19, 2016 USD ($)	Jul. 01, 2016 USD ($)	Dec. 24, 2014
PSE&G
Long-term debt
Stated interest rate								11.30%
One Communications Debt
Long-term debt
Financing costs		$ 0.3
Outstanding debt			$ 30.9
Unamortized financing costs			0.2
One Communications Debt | Minimum
Long-term debt
Percentage of notional amount required for hedging arrangement		30.00%
One Communications Debt | Minimum | Three month LIBOR
Long-term debt
Basis spread on variable rate (as a percent)		2.50%
One Communications Debt | Maximum | Three month LIBOR
Long-term debt
Basis spread on variable rate (as a percent)		2.75%
Viya Debt
Long-term debt
Term loan assumed							$ 60.0
Net leverage ratio							3.5
Stated interest rate					4.00%		4.00%
Financing costs					$ 0.9
Intercompany debt limit			75.0
Outstanding debt			60.0
Unamortized financing costs			0.7
Revolver loan | Credit facility
Long-term debt
Maximum borrowing capacity			225.0
Maximum investment in unrestricted subsidiaries			400.0
Borrowings outstanding			$ 0.0
Revolver loan | Credit facility | Minimum
Long-term debt
Commitment fee (as a percent)			0.175%
Revolver loan | Credit facility | Minimum | LIBOR
Long-term debt
Basis spread on variable rate (as a percent)			1.50%
Revolver loan | Credit facility | Minimum | Base rate
Long-term debt
Basis spread on variable rate (as a percent)			0.50%
Revolver loan | Credit facility | Maximum
Long-term debt
Commitment fee (as a percent)			0.25%
Revolver loan | Credit facility | Maximum | LIBOR
Long-term debt
Basis spread on variable rate (as a percent)			1.75%
Revolver loan | Credit facility | Maximum | Base rate
Long-term debt
Basis spread on variable rate (as a percent)			0.75%
Letter of credit sub-facility | Credit facility
Long-term debt
Maximum borrowing capacity			$ 10.0
Swingline sub-facility | Credit facility
Long-term debt
Maximum borrowing capacity			$ 10.0
Base rate before one-week or one-month LIBOR (as a percent)			1.00%
Swingline sub-facility | Credit facility | Federal Funds Effective Rate
Long-term debt
Basis spread on variable rate (as a percent)			0.50%
Term loans | Credit facility
Long-term debt
Maximum borrowing capacity			$ 200.0
Mobility Funds | Letter of credit sub-facility | Credit facility
Long-term debt
Maximum borrowing capacity			25.0
Ahana Operations | Series A Notes
Long-term debt
Secured debt principal amount						$ 20.6
Stated interest rate						4.427%
Ahana Operations | Series B Notes
Long-term debt
Secured debt principal amount						$ 45.2
Stated interest rate						5.327%
Ahana Operations | Series A and Series B Notes
Long-term debt
Financing costs						$ 2.8
Overdraft Facility | One Communications Debt
Long-term debt
Borrowings outstanding			0.0
Cash flow hedge | Interest rate swap
Long-term debt
Notional amount			$ 9.3	$ 11.0
Interest rate (as a percent)				1.874%
Subsequent event | Revolver loan | New Credit facility
Long-term debt
Maximum borrowing capacity	$ 200.0
Net leverage ratio	1.75
Subsequent event | Revolver loan | New Credit facility | Minimum
Long-term debt
Commitment fee (as a percent)	0.15%
Subsequent event | Revolver loan | New Credit facility | Minimum | LIBOR
Long-term debt
Basis spread on variable rate (as a percent)	1.25%
Subsequent event | Revolver loan | New Credit facility | Minimum | Base rate
Long-term debt
Basis spread on variable rate (as a percent)	0.25%
Subsequent event | Revolver loan | New Credit facility | Maximum
Long-term debt
Commitment fee (as a percent)	0.375%
Subsequent event | Revolver loan | New Credit facility | Maximum | LIBOR
Long-term debt
Basis spread on variable rate (as a percent)	2.25%
Subsequent event | Revolver loan | New Credit facility | Maximum | Base rate
Long-term debt
Basis spread on variable rate (as a percent)	1.25%
Subsequent event | Letter of credit sub-facility | New Credit facility
Long-term debt
Maximum borrowing capacity	$ 75.0
Performance letters of credit issued and outstanding	8.0
Subsequent event | Swingline sub-facility | New Credit facility
Long-term debt
Maximum borrowing capacity	$ 10.0
Base rate before one-week or one-month LIBOR (as a percent)	1.00%
Subsequent event | Swingline sub-facility | New Credit facility | Federal Funds Effective Rate
Long-term debt
Basis spread on variable rate (as a percent)	0.50%

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The debt covenant maximum for which the entity's investment in unrestricted subsidiaries under a credit facility.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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