Shareholders' Equity (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended	6 Months Ended
	Jan. 04, 2016	Jun. 30, 2016	Jun. 30, 2016
Business Acquisition Equity Interests Issued Or Issuable [Line Items]
Number of shares authorized to be repurchased		8,000,000	8,000,000
Purchase of treasury stock		$ 3.7	$ 95.1
Treasury Stock, Shares, Acquired		100,000	2,800,000
Treasury Stock Acquired, Average Cost Per Share		$ 29.70	$ 33.79
Common stock reissued			2,300,000
Eaton Partners [Member]
Business Acquisition Equity Interests Issued Or Issuable [Line Items]
Stock Issued During Period Shares Acquisitions	300,000