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Tracking Stock (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | ||||||
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Sep. 30, 2012
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Jun. 30, 2013
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Mar. 31, 2013
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Dec. 31, 2012
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Jun. 30, 2012
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Dec. 31, 2011
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Sep. 30, 2011
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| Tracking Stock [Abstract] | |||||||
| Stockholders' Equity Note, Stock Split, Conversion Ratio | 0.05 | ||||||
| Cash and Cash Equivalents, at Carrying Value | $ 1,448 | $ 1,448 | $ 2,660 | $ 790 | $ 847 | $ 790 | |
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Ventures Group [Member]
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| Tracking Stock [Abstract] | |||||||
| Cash and Cash Equivalents, at Carrying Value | 857 | 1,961 | 0 | 0 | |||
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Interactive Group [Member]
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| Tracking Stock [Abstract] | |||||||
| Cash and Cash Equivalents, at Carrying Value | $ 591 | $ 699 | $ 790 | $ 847 |
| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
This item represents the conversion ratio used in the calculation of a stock split. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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