Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 30, 2012	Sep. 30, 2011	Jun. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Income Tax Disclosure [Abstract]
Effective tax rate benefit	14.00%	11.10%		9.00%	2861.50%
Italian tax settlement expense			$ 6
Reversal of U.S. valuation allowance			87
Unrecognized tax benefits	6			6
Unrecognized tax benefits that would impact effective tax rate	4			4
Cumulative interest and penalties	2			2
Significant change in unrecognized tax benefits is reasonably possible, amount of unrecorded benefit	$ 1			$ 1

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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This element represents the total of accruals as of the date of the statement of financial position for interest recognized for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity and the amount of statutory penalties for a tax position claimed or expected to be claimed by the entity, in its tax return, that does not meet the minimum statutory threshold to avoid payment of penalties.

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- Definition

The amount of the change in the period in the valuation allowance for a specified deferred tax asset.

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