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Impairment Charges (Components Of Fair Values In Relation To Their Respective Carrying Values) (Details)
$ in Millions
12 Months Ended
Dec. 31, 2018
USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Goodwill, Fair Value Disclosure $ 833.8
Fair Value Inputs, Long Term Growth Rate, Debt-free Cash Flow 3.00%
Less than 100%  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Goodwill, Fair Value Disclosure $ 180.7
Fair Value Inputs, Long Term Growth Rate, Debt-free Cash Flow 3.00%
101% - 300%  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Goodwill, Fair Value Disclosure $ 502.5
Fair Value Inputs, Long Term Growth Rate, Debt-free Cash Flow 3.00%
301% - 600%  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Goodwill, Fair Value Disclosure $ 150.6
Fair Value Inputs, Long Term Growth Rate, Debt-free Cash Flow 3.00%
Minimum  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
10-year Compound Annual Growth Rate Range for Sales 1.80%
Discount Rate 8.50%
Minimum | Less than 100%  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
10-year Compound Annual Growth Rate Range for Sales 4.70%
Discount Rate 9.00%
Minimum | 101% - 300%  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Fair Value over Carrying Value divided by Carrying Value (as a percent) 101.00%
10-year Compound Annual Growth Rate Range for Sales 1.80%
Discount Rate 8.50%
Minimum | 301% - 600%  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Fair Value over Carrying Value divided by Carrying Value (as a percent) 301.00%
10-year Compound Annual Growth Rate Range for Sales 5.70%
Discount Rate 9.00%
Maximum  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
10-year Compound Annual Growth Rate Range for Sales 12.40%
Discount Rate 10.00%
Maximum | Less than 100%  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Fair Value over Carrying Value divided by Carrying Value (as a percent) 100.00%
10-year Compound Annual Growth Rate Range for Sales 5.20%
Discount Rate 9.50%
Maximum | 101% - 300%  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Fair Value over Carrying Value divided by Carrying Value (as a percent) 300.00%
10-year Compound Annual Growth Rate Range for Sales 5.00%
Discount Rate 10.00%
Maximum | 301% - 600%  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Fair Value over Carrying Value divided by Carrying Value (as a percent) 600.00%
10-year Compound Annual Growth Rate Range for Sales 12.40%
Discount Rate 10.00%