Income Taxes	6 Months Ended
Jun. 30, 2013
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company provides a valuation allowance for deferred tax assets when it is more likely than not that some portion, or all, of its deferred tax assets will not be realized. The Company’s deferred tax asset valuation allowance increased from $4.4 billion as of December 31, 2012 to $4.5 billion as of June 30, 2013, including the impact of comprehensive income for the six months ended June 30, 2013 and changes from other adjustments. These other adjustments include the realization of an income tax expense credit of approximately $22 million recorded for the six months ended June 30, 2013 by the Company as a result of passage of the American Taxpayer Relief Act of 2012. There was no amount of adjustment recorded by the Company during the six months ended June 30, 2012. Under current accounting rules, the Company is required to consider all items (including items recorded in other comprehensive income) in determining the amount of tax benefit that results from a loss from continuing operations and that should be allocated to continuing operations. Due to the significant volatility of items impacting other comprehensive income on a quarterly basis, the Company generally does not record any such tax benefit allocation until all items impacting other comprehensive income are known for the annual period. Thus, any such interim tax benefit allocation may subsequently be subject to reversal.

Income Taxes

6 Months Ended

Jun. 30, 2013

The Company provides a valuation allowance for deferred tax assets when it is more likely than not that some portion, or all, of its deferred tax assets will not be realized. The Company’s deferred tax asset valuation allowance increased from $4.4 billion as of December 31, 2012 to $4.5 billion as of June 30, 2013, including the impact of comprehensive income for the six months ended June 30, 2013 and changes from other adjustments. These other adjustments include the realization of an income tax expense credit of approximately $22 million recorded for the six months ended June 30, 2013 by the Company as a result of passage of the American Taxpayer Relief Act of 2012. There was no amount of adjustment recorded by the Company during the six months ended June 30, 2012.

Under current accounting rules, the Company is required to consider all items (including items recorded in other comprehensive income) in determining the amount of tax benefit that results from a loss from continuing operations and that should be allocated to continuing operations. Due to the significant volatility of items impacting other comprehensive income on a quarterly basis, the Company generally does not record any such tax benefit allocation until all items impacting other comprehensive income are known for the annual period. Thus, any such interim tax benefit allocation may subsequently be subject to reversal.