Income Taxes (Details 3) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Deferred tax assets
Deferred and refundable income taxes	$ 97	$ 104	$ 84
Deferred tax liabilities
Deferred income taxes and other liabilities	(505)	(539)	(584)
Deferred income taxes, net	$ (408)	$ (435)	$ (500)

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Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards, net of deferred tax liability attributable to taxable temporary differences.

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Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

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Amount of deferred tax liability attributable to taxable temporary differences net of deferred tax asset attributable to deductible temporary differences and carryforwards after valuation allowances.

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