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Income Taxes	6 Months Ended
Income Taxes	Jun. 30, 2014
Income Tax Disclosure [Abstract]
Income Taxes	6. INCOME TAXES Income tax provisions for interim (quarterly) periods are based on an estimated annual effective income tax rate calculated separately from the effect of significant, infrequent or unusual items. Income tax expense was $29 million for the three months ended June 30, 2014 compared to $23 million for the three months ended June 30, 2013. The increase in income tax expense was primarily driven by an increase in earnings. Income tax expense was $33 million for the six months ended June 30, 2014 compared to $25 million for the six months ended June 30, 2013. The increase in income tax expense was primarily driven by the the one-time benefit of approximately $16 million included in the six months ended June 30, 2013 in connection with the American Taxpayer Relief Act, which was partially offset by an increase in discrete benefits in the six months ended June 30, 2014.

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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