Consolidated Statements Of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income (Loss)	$ 77.7	$ 77.7
Income, net of tax	77.7	77.7
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	69.0	76.9
Deferred income tax expense (benefit)	(1.2)	(1.3)
Stock compensation expense	8.5	8.3
Changes in assets and liabilities:
Change in receivables	2.9	9.0
Change in other current assets	(13.4)	(11.6)
Change in deferred charges, net	0.2	0.7
Change in other assets and liabilities	(11.6)	(1.5)
Change in payables and other current liabilities	(9.7)	(1.9)
Net cash provided by operating activities	122.4	156.3
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(27.9)	(34.3)
Payments for (Proceeds from) Short-term Investments	0.0	(0.8)
Proceeds from Divestiture of Interest in Joint Venture	0.7	0.0
Net cash used in investing activities	(27.2)	(35.1)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from issuance of other long-term debt	100.0	0.0
Repayments of other long-term debt (term loan and capital lease obligations)	(216.0)	(2.0)
Proceeds from Asset Securitization Facility	503.8	449.0
Repayments of Asset Securitization Facility	(398.8)	(478.0)
Repurchase of common shares	(43.7)	(38.0)
Proceeds from exercise of stock options	0.4	0.3
Payments of Dividends	(17.0)	(15.5)
Excess tax benefit from share-based payment arrangements	0.0	1.0
Net cash (used in) provided by financing activities	(71.3)	(83.2)
Net (decrease) increase in cash and cash equivalents	23.9	38.0
Cash and cash equivalents at beginning of period	138.8	204.7
Cash and cash equivalents at end of period	$ 162.7	$ 242.7