Supplementary Data Supplemental Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2017

Supplemental Cash Flow Information [Abstract]

Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]

Supplemental Cash Flow Information

	Years ended December 31,
	2017		2016		2015
Cash paid for interest	$	82.3	$	78.8	$	74.5
Cash paid for income taxes, net of refunds 1	228.4		244.1		231.9

1 Refunds of $31.9, $26.6 and $13.0 were received for the years ended December 31, 2017, 2016 and 2015, respectively.