Subsequent Events (Details) $ / shares in Units, $ in Millions	Apr. 30, 2018 USD ($) $ / shares
Subsequent Event [Line Items]
Termination fee \| $	$ 175
Disposal Group, Disposed of by Sale \| ASG
Subsequent Event [Line Items]
Transaction price per share \| $ / shares	$ 63.00

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