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Summary of Redeemable Noncontrolling Interest (Parenthetical) (Detail) (B.D. Mobile) | Dec. 31, 2011
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B.D. Mobile |
Redeemable Noncontrolling Interest [Line Items] |
Percentage of equity interest of redeemable noncontrolling shareholders | 6.98%

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- Definition The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Details
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Balance Type: | na
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