Income Taxes Income Taxes (Tables)

12 Months Ended

Dec. 31, 2017

Income Tax Disclosure [Abstract]

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

Deferred tax liabilities (assets) were comprised of the following at December 31:

(in millions)	2017			2016
Depreciation	$	148.0		$	229.5
Deferred revenue	14.4			15.8
Intangibles	6.4			8.9
Gain on debt redemption	7.9			25.7
State taxes	22.1			30.2
Other	10.6			31.5
Deferred tax liabilities	209.4			341.6
Claims and insurance	(98.2		)	(149.6		)
Net operating loss carryforwards	(228.0		)	(302.9		)
Employee benefit accruals	(88.8		)	(201.8		)
Sale/Leaseback transaction	(64.7		)	(99.9		)
Other	(31.7		)	(46.0		)
Deferred tax assets	(511.4		)	(800.2		)
Valuation allowance	305.1			461.7
Net deferred tax assets	(206.3		)	(338.5		)
Net deferred tax liability	$	3.1		$	3.1

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

A reconciliation between income taxes at the federal statutory rate and the consolidated effective tax rate follows:

	2017		2016		2015
Federal statutory rate	35.0	%	35.0	%	35.0	%
State income taxes, net	(2.8	)%	2.9	%	(50.0	)%
Foreign tax rate differential	(10.0	)%	(3.3	)%	43.2	%
Permanent differences	(8.9	)%	6.9	%	(88.6	)%
Valuation allowance	(48.6	)%	(13.0	)%	(243.2	)%
Benefit from intraperiod tax allocation under ASC 740	73.5	%	—	%	265.9	%
Net change in unrecognized tax benefits	0.5	%	(10.2	)%	(11.4	)%
Benefit from settlement of litigation & audits	—	%	—	%	54.5	%
Other, net (primarily prior year return to provision)	1.6	%	(5.7	)%	110.5	%
Effective tax rate	40.3	%	12.6	%	115.9	%

Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]

The income tax provision (benefit) consisted of the following:

(in millions)	2017			2016			2015
Current:
Federal	$	(0.9	)	$	(1.7	)	$	(0.8	)
State	0.8			(0.7		)	(1.6		)
Foreign	6.0			5.9			7.1
Current income tax expense	$	5.9		$	3.5		$	4.7
Deferred:
Federal	$	(13.3	)	$	—		$	(8.7	)
State	—			—			(3.0		)
Foreign	0.1			(0.4		)	1.9
Deferred income tax benefit	$	(13.2	)	$	(0.4	)	$	(9.8	)
Income tax expense (benefit)	$	(7.3	)	$	3.1		$	(5.1	)
Based on the income (loss) before income taxes:
Domestic	$	(30.5	)	$	3.9		$	(33.2	)
Foreign	12.4			20.7			28.8
Income (Loss) before income taxes	$	(18.1	)	$	24.6		$	(4.4	)

Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]

A rollforward of the total amount of unrecognized tax benefits for the years ended December 31 is as follows:

(in millions)		2017			2016
Unrecognized tax benefits at January 1		$	45.3		$	30.6
Increases related to:
	Tax positions taken during a prior period	11.8			17.3
	Tax positions taken during the current period	0.4			0.4
Decreases related to:
	Tax positions taken during a prior period	—			—
	Lapse of applicable statute of limitations	(0.7		)	(3.0		)
	Settlements with taxing authorities	—			—
Unrecognized tax benefits at December 31		$	56.8		$	45.3

Summary of Income Tax Examinations [Table Text Block]

Tax years that remain subject to examination for our major tax jurisdictions as of December 31, 2017:

Statute remains open	2005-2016
Tax years currently under examination/exam completed	2005-2013
Tax years not examined	2014-2017