Shareholders' Equity - Stock Repurchase (Details) - Subsequent Event [Member] - October 2015 Stock Repurchase Program [Member] $ in Millions	Oct. 23, 2015 USD ($)
Subsequent Event [Line Items]
Stock Repurchase Program, Authorized Amount	$ 500
Accelerated stock repurchase agreement October 23, 2015
Subsequent Event [Line Items]
Stock Repurchase Program, Authorized Amount	$ 200

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration