XML 51 R36.htm IDEA: XBRL DOCUMENT v3.8.0.1
Supplemental Cash Flow Information (Tables)
 12 Months Ended
Dec. 31, 2017
Supplemental Cash Flow Information [Abstract]  
Supplemental Disclosure of Cash Flow Information
  
Years ended December 31
In millions
2017
2016
2015
Cash paid for interest, net
$
107.2

$
143.4

$
76.9

Cash paid for income taxes, net
362.1

145.1

182.8