Expected Infrastructure Investments

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- Definition

Expected Infrastructure Investments, Period

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- Definition

Expenditures for cost recovery program.

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Expenditures For Cost Recovery Program Incurred

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Incremental Energy Savings Goal, Next Twelve Months, Percent

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Incremental Energy Savings Goal, Percent

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- Definition

Incremental Energy Savings Goal, Thereafter, Percent

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- Definition

Number of Supply Components

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- Definition

Public Utilities, Approved Rate Increase (Decrease) Due to Change in Tax Rate, Amount

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- Definition

Public Utilities, Requested Electric Vehicle Program, Charging Equipment Rebates Amortization Period

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Public Utilities, Requested Electric Vehicle Program, Cost of Charging Equipment Rebates

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Public Utilities, Requested Electric Vehicle Program, Number of Commercial Charging Equipment Rebates

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Public Utilities, Requested Electric Vehicle Program, Number of Residential Charging Equipment Rebates

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Public Utilities, Tax Cuts and Jobs Act of 2017, Impact on Base Rate

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Recovery period for expenditures for cost recovery program.

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Recovery Program, Amortization Period

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- Definition

Regulatory matters.

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Amount of public utility's approved rate increase (decrease) by regulatory agency.

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Regulatory Matters - Maryland and New Jersey (Details) $ in Millions						3 Months Ended	36 Months Ended
	Mar. 26, 2018 USD ($)	Jan. 19, 2018 USD ($) rebate	Dec. 12, 2016 USD ($)	Jul. 16, 2015	Feb. 27, 2013 USD ($)	Mar. 31, 2018 component	Dec. 31, 2020 USD ($)	Dec. 31, 2017 USD ($)	Feb. 15, 2018 USD ($)
Maryland
Regulatory Matters [Line Items]
Expected infrastructure investments					$ 2,700.0
Period of expected infrastructure investments					15 years
New Jersey
Regulatory Matters [Line Items]
Number of supply components \| component						2,000,000
PE \| Maryland
Regulatory Matters [Line Items]
Recovery period for expenditures for cost recovery program						3 years
Incremental energy savings goal in the next 12 months (percent)				0.97%
Incremental energy savings goal per year (percent)				0.00%
Incremental energy savings goal thereafter (percent)				2.00%
Expenditures for cost recovery program incurred								$ 60.0
Amortization period						5 years
PE \| MPSC
Regulatory Matters [Line Items]
Number of residential charging equipment rebates \| rebate		2,000
Number of commercial charging equipment rebates \| rebate		259
Cost of charging equipment rebates		$ 12.0
Charging equipment rebates amortization period		5 years
JCP&L \| NJBPU \| New Jersey
Regulatory Matters [Line Items]
Approved amount of annual increase (decrease)	$ (28.6)		$ 80.0
Approved rider due to change in tax rate	$ 1.3
Scenario, Forecast \| PE \| Maryland
Regulatory Matters [Line Items]
Recovery period for expenditures for cost recovery program							3 years
Expenditures for cost recovery program							$ 116.0
Minimum \| PE \| MPSC \| Maryland
Regulatory Matters [Line Items]
Impact on base rate									$ 7.0
Maximum \| PE \| MPSC \| Maryland
Regulatory Matters [Line Items]
Impact on base rate									$ 8.0