Supplementary Cash Flow Information (Tables)

3 Months Ended

Mar. 31, 2018

Supplemental Cash Flow Information [Abstract]

Schedule of cash flow, supplemental disclosures

Net cash paid (received) during the period for interest, net of capitalized interest, and income taxes are presented below:

	Three Months Ended March 31,
	2018			2017
Net cash paid (received) during the period for:
Interest, net of capitalized interest	$	32.8		$	45.1
Income taxes	(7.5		)	0.1

Schedule of non-cash investing and financing activities

Non-cash investing and financing activities are presented below:

	Three Months Ended March 31,
	2018		2017
Capital investments	$	20.0	$	21.6
Issuance of restricted stock and restricted stock units	3.7		3.8