Comprehensive Income (Tables)

3 Months Ended

Mar. 31, 2013

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

Schedule of Accumulated Other Comprehensive Income (Loss)

The following table provides the components of accumulated other comprehensive loss by component (in millions):

	Defined Benefit Pension Itemsa			Equity Method Investments			Total
Balance at December 31, 2012	$	(241	)	$	(4	)	$	(245	)
Other comprehensive income before reclassifications	—			(2		)	(2		)
Amounts reclassified from accumulated other comprehensive income	3			—			3
Balance at March 31, 2013	$	(238	)	$	(6	)	$	(244	)

^a Amounts are net of tax.

Reclassifications out of Accumulated Other Comprehensive Loss
	Three Months Ended March 31,
Details about Accumulated Other Comprehensive Loss Components	2013			Income Statement Line Item
Amortization of defined benefit pension items
Actuarial losses	$	5		b
	5			Total before tax
	(2		)	Tax expense
Total reclassifications for the period	$	3		Net of tax

^b This accumulated other comprehensive loss component is included in the computation of net periodic pension cost (see Note 8 for additional details).