XML 113 R48.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Revenue Adoption of ASC 606 (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Jan. 01, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Retained earnings $ 1,549.4 $ 1,353.4  
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member]      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Retained earnings     $ 11.4