Schedule II - Valuation and Qualifying Accounts (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Movement in Valuation and Qualifying Accounts
Balance at Beginning of Period	$ 70.0		$ 126.1		$ 79.6
Charged to Costs and Expenses	43.8		55.3		93.2
Charged to Other Accounts	0		0		0
Deductions	41.6	[1]	111.4	[1]	46.7	[1]
Balance at End of Period	72.2		70.0		126.1
Deferred Tax Assets, Net	(6,762)		(6,820)
Deferred tax assets, loss and credit carryforwards	1,657		2,228
Customers
Movement in Valuation and Qualifying Accounts
Balance at Beginning of Period	52.2		46.6		42.0
Charged to Costs and Expenses	24.1		36.0		34.6
Charged to Other Accounts	0		0		0
Deductions	27.4		30.4		30.0
Balance at End of Period	48.9		52.2		46.6
All others
Movement in Valuation and Qualifying Accounts
Balance at Beginning of Period	17.8		79.5		37.6
Charged to Costs and Expenses	19.7		19.3		58.6
Charged to Other Accounts	0		0		0
Deductions	14.2		81.0		16.7
Balance at End of Period	23.3		17.8		79.5
Tax valuation allowance
Movement in Valuation and Qualifying Accounts
Balance at Beginning of Period	1,380.0	[2]	1,016.5	[2]	0
Charged to Costs and Expenses	0		363.5	[2]	1,016.5	[2]
Charged to Other Accounts	0		0		0
Deductions	1,351.0	[3]	0		0
Balance at End of Period	29.0		1,380.0	[2]	1,016.5	[2]
Edison Mission Energy
Movement in Valuation and Qualifying Accounts
Deferred Tax Assets, Net			220
Deferred tax assets, loss and credit carryforwards			1,600
Southern California Edison
Movement in Valuation and Qualifying Accounts
Balance at Beginning of Period	65.5		74.9		75.0
Charged to Costs and Expenses	43.7		55.3		46.6
Charged to Other Accounts	0		0		0
Deductions	41.6	[1]	64.7	[1]	46.7	[1]
Balance at End of Period	67.6		65.5		74.9
Deferred Tax Assets, Net	(8,399)		(7,473)
Deferred tax assets, loss and credit carryforwards	205		427
Southern California Edison | Customers
Movement in Valuation and Qualifying Accounts
Balance at Beginning of Period	52.2		46.6		42.0
Charged to Costs and Expenses	24.1		36.0		34.6
Charged to Other Accounts	0		0		0
Deductions	27.4		30.4		30.0
Balance at End of Period	48.9		52.2		46.6
Southern California Edison | All others
Movement in Valuation and Qualifying Accounts
Balance at Beginning of Period	13.3		28.3		33.0
Charged to Costs and Expenses	19.6		19.3		12.0
Charged to Other Accounts	0		0		0
Deductions	14.2		34.3		16.7
Balance at End of Period	$ 18.7		$ 13.3		$ 28.3

[1] Accounts written off, net.

[2] Edison International recorded deferred tax assets of $2.2 billion related to net operating losses and tax carryforwards that pertain to Edison International's consolidated or combined federal and state tax returns, including approximately $1.6 billion related to EME. Edison International continues to consolidate EME for federal and certain combined state tax returns. EME's Plan of Reorganization, filed in December 2013 ("December Plan of Reorganization"), provides for the transfer of EIX's ownership interest to the creditors, which would result in a tax deconsolidation of EME. Under federal and state tax regulations, the tax deconsolidation of EME would reduce the amounts of net operating loss and tax credits carryforwards that Edison International would be eligible to use in future periods. As a result of the EME's December Plan of Reorganization, which would result in a tax deconsolidation of EME, Edison International has recorded a $1.380 billion valuation allowance based on the estimated amount of such benefits as calculated under the applicable federal and state tax regulations as of December 31, 2013. The deferred income tax benefits recognized by Edison International less the valuation allowance for amounts that would no longer be available upon tax deconsolidation of EME was approximately $220 million.

[3] On April 1, 2014, under the Amended Plan of Reorganization, EME emerged from bankruptcy free of liabilities but remained an indirect wholly-owned subsidiary of Edison International, which will continue to be consolidated with Edison International for income tax purposes. Edison International anticipates realization of the federal and California tax benefits before they expire. Therefore, the valuation allowance on federal and California tax benefits that Edison International recorded in 2013 was released in 2014. The remaining valuation allowance is related to non California state tax benefits.