Supplemental cash flow information (Tables)
 9 Months Ended
Sep. 30, 2016
Supplemental Cash Flow Information [Abstract]  
Schedule of Cash Flow, Supplemental Disclosures
 
Nine Months 
 Ended September 30,
(In millions)
2016
 
2015
Cash paid for:
 
 
 
Interest
15.8

 
15.3

Income taxes, net
55.3

 
34.8