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Investments In Available-For-Sale Securities And Other Cost Investments (Narrative) (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 1 Months Ended | |
|---|---|---|---|
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Mar. 31, 2013
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Mar. 31, 2012
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Jan. 18, 2013
SIRIUS XM [Member]
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| Purchase of shares in equity method investee | 50.0 | ||
| Payments to Acquire Investments | $ 18 | $ 2 | |
| X | ||||||||||
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- Definition
Number of shares purchased in equity method investee No definition available.
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| X | ||||||||||
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- Definition
The cash outflow associated with the purchase of all investments (debt, security, other) during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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