Legal Proceedings (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013
Loss Contingencies [Line Items]
Class Action Lawsuit Members	22,500
Pending Litigation Settlement	$ 90
Legal Reserve [Member] \| Maximum [Member]
Loss Contingencies [Line Items]
Loss contingency, range of possible loss not accrued	$ 400

The difference between the maximum amount of estimated loss and the amount recorded as of the balance sheet date.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Interpretation (FIN)

-Number 14

-Paragraph 3

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Name:	us-gaap_LossContingencyRangeOfPossibleLossPortionNotAccrued
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant