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Investments in Unconsolidated Businesses - Additional Information (Detail) (USD $)
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12 Months Ended | ||
|---|---|---|---|
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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| Schedule of Equity Method Investments [Line Items] | |||
| Dividends and repatriations of foreign earnings received | $ 0 | $ 400,000,000 | $ 500,000,000 |
| Goodwill | 24,634,000,000 | 24,139,000,000 | 23,357,000,000 |
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Vodafone Omnitel N.V.
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| Schedule of Equity Method Investments [Line Items] | |||
| Goodwill | $ 1,100,000,000 | $ 1,000,000,000 | |