Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2013

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Stock-Based Compensation Expense

The following table sets forth stock-based compensation expense recognized for the three and six months endedJune 30, 2013 and 2012. Of the 2013 amount, $2 million was included as part of merger transaction costs. These costs were recorded as part of general and administrative expense on the Company's consolidated statements of comprehensive income (loss).

	Three Months Ended June 30				Six Months Ended June 30
	2013		2012		2013		2012
	(in millions)
Stock-based compensation expense	$	2	$	2	$	3	$	3