Segment Information (Details 1) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Corporate and Other segment loss
Corporate and other expenses	$ (272)	$ (222)	$ (298)
Interest expense, net	(221)	(141)	(125)
Loss on early extinguishment of debt	(40)
Gain on investments	0	6	4
Acquisition-related costs	0	(134)	(18)
Total corporate and other expenses	$ (533)	$ (491)	$ (437)

This element represents sum of total expenses not attributable to operating segments.

No definition available.

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- Definition

This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

+ References

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-Paragraph 59

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-SubTopic 10

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The net realized gain (loss) on investments sold during the period, not including gains (losses) on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity, which, for cash flow reporting, is a component of proceeds from investing activities.

+ References

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Amount represents the difference between the fair value of the payments made and the carrying amount of the debt at the time of its extinguishment.

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The cost of borrowed funds accounted for as interest that was charged against earnings during the period.

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This element represents a sum total of expenses not separately reflected on the income statement for the period.

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