Subsequent Event (Details) - Jul. 17, 2015 - Interest Rate Swap [Member] - Subsequent Event [Member] - USD ($) $ in Millions	Total
Minimum [Member]
Subsequent Event [Line Items]
Derivative, Fixed Interest Rate	1.00%
Derivative, Notional Amount	$ 115
Maximum [Member]
Subsequent Event [Line Items]
Derivative, Fixed Interest Rate	2.70%
Derivative, Notional Amount	$ 235

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.

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