Comprehensive Income

9 Months Ended

Sep. 30, 2015

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Comprehensive Income

Comprehensive Income

Other comprehensive income refers to revenues, expenses, gains and losses that under generally accepted accounting principles are included in comprehensive income, a component of equity within the Consolidated Balance Sheets, rather than net income on the Consolidated Statements of Income. Under existing accounting standards, other comprehensive income may include, among other things, unrecognized gains and losses and prior service credit related to pension and other postretirement benefit plans.

The following tables provide the components of accumulated other comprehensive (loss) / income (AOCI) by component (in millions):

	Pension and Retiree Health and Welfare Benefit Itemsa			Equity Method Investments			Total
Balance at December 31, 2014	$	—		$	(2	)	$	(2	)
Other comprehensive income before reclassifications	—			(1		)	(1		)
Amounts reclassified from AOCI	—			—			—
Balance at September 30, 2015	$	—		$	(3	)	$	(3	)
Balance at December 31, 2013	$	251		$	(6	)	$	245
Other comprehensive income before reclassifications	—			4			4
Amounts reclassified from AOCI	(1		)	—			(1		)
Balance at September 30, 2014	$	250		$	(2	)	$	248

^a Amounts are net of tax.

Reclassifications out of AOCIb
	Three Months Ended September 30,
Details about Accumulated Other Comprehensive Income Components	2015			2014			Income Statement Line Item
Amortization of pension and retiree health and welfare benefit items
Actuarial losses	$	(1	)	$	—		c
Prior service credits	1			1			c
	—			1			Total before tax
	—			—			Tax benefit / (expense)
Total reclassifications for the period	$	—		$	1		Net of tax
	Nine Months Ended September 30,
Details about Accumulated Other Comprehensive Income Components	2015			2014			Income Statement Line Item
Amortization of pension and retiree health and welfare benefit items
Actuarial losses	$	(3	)	$	(1	)	c
Prior service credits	2			2			c
	(1		)	1			Total before tax
	1			—			Tax benefit / (expense)
Total reclassifications for the period	$	—		$	1		Net of tax

^b Amounts in parenthesis indicate debits to the income statement.

^c This accumulated other comprehensive income component is included in the computation of net periodic pension cost and retiree health and welfare (see Note 8 for additional details).