v2.4.0.6

Subsequent Events (Details) (Share Repurchases, USD $) In Billions, unless otherwise specified	1 Months Ended
	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