Commitments and Contingencies Litigation (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended	1 Months Ended
Feb. 26, 2011	Nov. 30, 2010
Compensatory Damages [Member]
Loss Contingencies [Line Items]
Litigation settlement		$ 2.75
Punitive Damages [Member]
Loss Contingencies [Line Items]
Litigation settlement	$ 24.75	$ 40.00

This element represents the gross amount awarded, to be received by, or to be remitted to the entity in settlement of litigation occurring during the period.

No definition available.

Name:	us-gaap_LitigationSettlementGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration