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Changes in Carrying Amount of Wireless Licenses (Detail) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | ||
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Mar. 31, 2013
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Dec. 31, 2012
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Mar. 31, 2013
Wireless Licenses
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| Wireless Licenses, Goodwill and Other Intangible Assets [Line Items] | |||
| Beginning balance | $ 75,645 | $ 77,744 | $ 77,744 |
| Capitalized interest on wireless licenses | 133 | ||
| Reclassifications, adjustments and other | (2,232) | ||
| Ending balance | $ 75,645 | $ 77,744 | $ 75,645 |
| X | ||||||||||
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- Definition
The change during the reporting period in the carrying value of indefinite-lived intangible assets. The change could be the result of new indefinite-lived intangible assets acquired, indefinite-lived intangible assets impairment during the period, indefinite-lived intangible assets written off related to the sale of a business, or other adjustments to indefinite-lived intangible assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Carrying amount (original costs adjusted for previously recognized amortization and impairment) as of the balance sheet date for the capitalized costs to acquire rights under a license arrangement (for example, to sell specified products in a specified territory) having an indefinite period of benefit. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of interest capitalized during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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