XML 100 R86.htm IDEA: XBRL DOCUMENT v3.10.0.1
Income Taxes (Deferred Tax Valuation Allowance) (Details) - Valuation Allowance of Deferred Tax Assets - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Movement in Deferred Tax Valuation Allowances [Roll Forward]      
Balance at beginning of year $ 72.4 $ 62.3 $ 63.7
Additions charged to provision for income taxes 0.9 12.9 0.3
Deferred tax assets realized or written-off (5.9) (2.8) (1.4)
Other, net 0.0 0.0 (0.3)
Balance at end of year 73.5 72.4 62.3
Expirations Of State Net Operating Losses [Member]      
Movement in Deferred Tax Valuation Allowances [Roll Forward]      
Current year acquisitions $ 6.1 $ 0.0 $ 0.0