Stockholders' Equity and Accumulated Other Comprehensive Income (Loss) (Narrative) (Details) $ in Millions	Sep. 30, 2016 USD ($)
Stock Repurchase Program, Authorized Amount	$ 1,100.0
Stock Repurchase Program, Remaining Value Authorized to be Repurchased	$ 255.9

Amount remaining of a stock repurchase plan authorized.

No definition available.

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