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Income Taxes	3 Months Ended
Income Taxes	Mar. 31, 2014
Income Tax Disclosure [Abstract]
Income Taxes	6. INCOME TAXES Income tax provisions for interim (quarterly) periods are based on estimated annual income taxes calculated separately from the effect of significant, infrequent or unusual items. Income tax expense was $4 million for the three months ended March 31, 2014 compared to $2 million for the three months ended March 31, 2013. The increase in income tax expense was primarily driven by the one-time benefit of approximately $16 million included in the three months ended March 31, 2013 in connection with the American Taxpayer Relief Act of 2012 that was signed into law in January 2013. The increase was partially offset by discrete benefits of $12 million in the three months ended March 31, 2014, including a favorable change in uncertain tax positions.

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

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