Income Taxes Income Taxes (Tables)

12 Months Ended

Dec. 31, 2014

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)	2014			2013
Depreciation	$	259.6		$	295.2
Deferred revenue	14.7			17.2
Intangibles	22.3			29.5
Gain on debt redemption	51.3			64.3
Other	87.0			54.7
Deferred tax liabilities	434.9			460.9
Claims and insurance	(168.8		)	(169.2		)
Net operating loss carryforwards	(316.4		)	(329.1		)
Employee benefit accruals	(273.8		)	(237.9		)
Other	(169.0		)	(176.7		)
Deferred tax assets	(928.0		)	(912.9		)
Valuation allowance	494.5			454.1
Net deferred tax assets	(433.5		)	(458.8		)
Net deferred tax liability	$	1.4		$	2.1

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:

	2014		2013		2012
Federal statutory rate	35.0	%	35.0	%	35.0	%
State income taxes, net	(4.9	)%	(2.4	)%	(1.8	)%
Foreign tax rate differential	1.4	%	(0.1	)%	2.6	%
Permanent differences	(6.4	)%	2.0	%	8.6	%
Valuation allowance	(31.9	)%	(30.9	)%	(39.8	)%
Benefit from intraperiod tax allocation under ASC 740	—	%	32.2	%	—	%
Net (increase) decrease in unrecognized tax benefits	17.8	%	0.6	%	(1.7	)%
Benefit from settlement of Tax Court litigation	1.6	%	—	%	6.4	%
Other, net (including prior year return to provision)	6.6	%	(1.0	)%	0.6	%
Effective tax rate	19.2	%	35.4	%	9.9	%

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

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

(in millions)	2014			2013			2012
Current:
Federal	$	(23.6	)	$	(14.5	)	$	(24.0	)
State	3.7			1.4			2.5
Foreign	4.0			9.6			2.7
Current income tax benefit	$	(15.9	)	$	(3.5	)	$	(18.8	)
Deferred:
Federal	$	—		$	(41.7	)	$	5.5
State	—			—			0.5
Foreign	(0.2		)	(0.7		)	(2.2		)
Deferred income tax provision (benefit)	$	(0.2	)	$	(42.4	)	$	3.8
Income tax benefit	$	(16.1	)	$	(45.9	)	$	(15.0	)
Based on the income (loss) before income taxes:
Domestic	$	(106.2	)	$	(152.8	)	$	(173.8	)
Foreign	22.4			23.3			22.3
Loss before income taxes	$	(83.8	)	$	(129.5	)	$	(151.5	)

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)		2014			2013
Unrecognized tax benefits at January 1		$	27.6		$	29.7
Increases related to:
	Tax positions taken during a prior period	11.6			1.3
	Tax positions taken during the current period	0.5			0.9
Decreases related to:
	Tax positions taken during a prior period	(5.6		)	—
	Lapse of applicable statute of limitations	(9.9		)	(1.2		)
	Settlements with taxing authorities	(1.1		)	(3.1		)
Unrecognized tax benefits at December 31		$	23.1		$	27.6

Summary of Income Tax Examinations [Table Text Block]

Tax years that remain subject to examination for our major tax jurisdictions as of December 31, 2014:

Statute remains open	2005-2012
Tax years currently under examination/exam completed	2005-2012
Tax years not examined	2013-2014