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Cash Flow Information (Tables)
 12 Months Ended
Dec. 31, 2017
Supplemental Cash Flow Elements [Abstract]  
Schedule Of Cash Flow Supplemental Disclosures Table
Supplemental disclosures of cash paid for interest and income taxes and non-cash investing and financing information is as follows:
 
Years Ended December 31,
(in millions)
2017
 
2016
 
2015
Cash paid (received) during the period for:
 
 
 
 
 
Interest
$
178.9

 
$
163.0

 
$
162.3

Less amount capitalized
23.9

 
38.5

 
36.1

Cash interest, net
$
155.0

 
$
124.5

 
$
126.2

Income taxes
$
(70.1
)
 
$
(65.4
)
 
$
193.3