v2.4.0.6

Subsequent Events (Details) (Share Repurchases, USD $) In Billions, unless otherwise specified | 1 Months Ended
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Apr. 30, 2012
Share Repurchases |
Subsequent Event |
Additional authorization for repurchase of ordinary shares | $ 2.5

X
- Definition The amount authorized by an entity's Board of Directors under a stock repurchase plan. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramAuthorizedAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration