Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2014

Accounting Policies [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss)

The following table summarizes the changes in Accumulated other comprehensive loss by component for the years ended December 31, 2014 and 2013:

	Changes in Accumulated Other Comprehensive Loss by Component (a)
	Net Unrealized Gain/(Loss) on Derivatives			Net Unrealized Gain/(Loss) on Investments			Benefit Obligations (b)			Foreign Currency Translation			Total
	(In millions)
Balance, January 1, 2013	$	(4	)	$	(8	)	$	(148	)	$	2		$	(158	)
Other comprehensive income (loss) before reclassifications	—			2			13			(2		)	13
Amounts reclassified from accumulated other comprehensive income	—			—			9			—			9
Net current-period other comprehensive income (loss)	—			2			22			(2		)	22
Balance, December 31, 2013	$	(4	)	$	(6	)	$	(126	)	$	—		$	(136	)
Other comprehensive income (loss) before reclassifications	—			1			(25		)	(2		)	(26		)
Amounts reclassified from accumulated other comprehensive income	—			—			7			—			7
Net current-period other comprehensive income (loss)	—			1			(18		)	(2		)	(19		)
Balance, December 31, 2014	$	(4	)	$	(5	)	$	(144	)	$	(2	)	$	(155	)

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(a)All amounts are net of tax.

(b) The amounts reclassified from accumulated other comprehensive income (loss) are included in the computation of the net periodic pension and other postretirement benefit costs (see Note 18 to the Consolidated Financial Statements "Retirement Benefits and Trusteed Assets").

Schedule of Finite-Lived Intangible Assets by Major Class

The Company has certain intangible assets relating to emission allowances, renewable energy credits and non-utility contracts as shown below:

	December 31, 2014		December 31, 2013
	(In millions)
Emission allowances	$	1	$	2
Renewable energy credits	45		51
Contract intangible assets	122		126
	168		179
Less accumulated amortization	57		45
Intangible assets, net	111		134
Less current intangible assets	9		12
	$	102	$	122

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

The following table summarizes the estimated amortization expense expected to be recognized during each year through 2019:

Estimated amortization expense	(In millions)
2015	$	12
2016	$	11
2017	$	8
2018	$	8
2019	$	6