Stockholder's Equity (Stock Repurchase Program) (Details) - USD ($) $ in Millions	Nov. 10, 2015	Jan. 01, 2016
Share Repurchase [Line Items]
Stock Repurchase Initiation Date	Nov. 10, 2015
Stock Repurchase Authorized Dollar Amount	$ 400.0
Remaining authorized repurchase amount		$ 400.0

Amount remaining of a stock repurchase plan authorized.

No definition available.

Name:	us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant