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Investment and other income (expense), net (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Investment and other income, net
Interest income	$ 6	$ 14	$ 8
Interest expense	(1)	(4)	(5)
Change in fair value of other financial liability	0	0	22
Net realized gain (loss) on foreign exchange contracts with Vivendi	2	(7)	(2)
Investment and other income (expense), net	$ 7	$ 3	$ 23

Aggregate impact of foreign currency derivatives on earnings for the period. Includes impact of foreign currency cash flow hedge ineffectiveness and the ineffectiveness of fair value hedging derivatives and full change in fair value of the foreign currency derivatives not designated as hedging instruments.

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- Definition

Interest expense on all other items not previously classified. For example, includes dividends associated with redeemable preferred stock of a subsidiary that is treated as a liability in the parent's consolidated balance sheet.

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