Annual report pursuant to Section 13 and 15(d)

FAIR VALUE OF FINANCIAL INSTRUMENTS (Fair Value Of Assets And Liabilities) (Details)

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FAIR VALUE OF FINANCIAL INSTRUMENTS (Fair Value Of Assets And Liabilities) (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Assets:    
Cash equivalents $ 187.6 $ 543.4
Derivative Asset 45.8 91.5
Total Asset 233.4 634.9
Liabilities:    
Derivative Liability 4.3 3.7
Total Liability 4.3 3.7
Fair Value, Inputs, Level 1 [Member]    
Assets:    
Cash equivalents 0.0 0.8
Derivative Asset 0.0 0.0
Total Asset 0.0 0.8
Liabilities:    
Derivative Liability 0.0 0.0
Total Liability 0.0 0.0
Fair Value, Inputs, Level 2 [Member]    
Assets:    
Cash equivalents 187.6 542.6
Derivative Asset 0.0 0.1
Total Asset 187.6 542.7
Liabilities:    
Derivative Liability 3.2 3.7
Total Liability 3.2 3.7
Fair Value, Inputs, Level 3 [Member]    
Assets:    
Cash equivalents 0.0 0.0
Derivative Asset 45.8 91.4
Total Asset 45.8 91.4
Liabilities:    
Derivative Liability 1.1 0.0
Total Liability $ 1.1 $ 0.0