XML 111 R100.htm IDEA: XBRL DOCUMENT v3.7.0.1
Shareholders' Equity (Details) - USD ($)
3 Months Ended
Jan. 03, 2017
Mar. 31, 2017
Mar. 31, 2016
Business Acquisition Equity Interests Issued Or Issuable [Line Items]      
Number of shares authorized to be repurchased   7,400,000  
Purchase of treasury stock   $ 0 $ 91,400,000
Treasury Stock, Shares, Acquired     2,700,000
Treasury Stock Acquired, Average Cost Per Share     $ 33.98
Common stock reissued   1,600,000  
City Securities [Member]      
Business Acquisition Equity Interests Issued Or Issuable [Line Items]      
Stock Issued During Period Shares Acquisitions 200,000