Supplemental Cash Flow and Noncash Investing Transactions (Tables)

12 Months Ended

Dec. 31, 2014

Supplemental Cash Flow Elements [Abstract]

Supplemental Cash Flow Information

	2014		2013		2012
Supplemental Cash Flow Information (in millions)
Interest paid (1)	$	142.6	$	148.7	$	162.3
Income taxes paid, net	18.7		7.4		11.1

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(1) Interest paid consisted of interest on debt obligations, interest rate swaps (net of interest received), and capital leases. The interest expense we capitalized as part of the cost of construction of major assets was immaterial for all periods presented.