Quarterly report pursuant to Section 13 or 15(d)

Basis Of Financial Statement Presentation (Narrative II) (Details)

v3.8.0.1
Basis Of Financial Statement Presentation (Narrative II) (Details) - USD ($)
$ in Millions
3 Months Ended
Jan. 01, 2018
Mar. 31, 2018
Accounting Standards Update 2016-01 [Member]    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Quantification of the effect of adopting the new accounting standard or change in accounting principle expected $ 0.3  
Equity securities without readily determinable fair values $ 2.4  
Accounting Standards Update 2016-02 [Member]    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Quantification of the effect of adopting the new accounting standard or change in accounting principle expected   $ 150.4