Subsequent Event (Details) - Subsequent Event $ / shares in Units, $ in Millions	Dec. 29, 2017 USD ($) $ / shares
Subsequent Event [Line Items]
Settlement payment	$ 80.8
Settlement payment, net of tax	$ 52.8
Settlement payment per basic and diluted share (in dollars per share) \| $ / shares	$ 1.09

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