Income Taxes Income Taxes (Tables)

12 Months Ended

Dec. 31, 2015

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)	2015			2014
Depreciation	$	256.3		$	259.6
Deferred revenue	13.9			14.7
Intangibles	16.2			22.3
Gain on debt redemption	38.5			51.3
Other	92.8			87.0
Deferred tax liabilities	417.7			434.9
Claims and insurance	(165.7		)	(168.8		)
Net operating loss carryforwards	(302.4		)	(316.4		)
Employee benefit accruals	(255.2		)	(273.8		)
Other	(161.4		)	(169.0		)
Deferred tax assets	(884.7		)	(928.0		)
Valuation allowance	470.5			494.5
Net deferred tax assets	(414.2		)	(433.5		)
Net deferred tax liability	$	3.5		$	1.4

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:

	2015		2014		2013
Federal statutory rate	35.0	%	35.0	%	35.0	%
State income taxes, net	(50.0	)%	(4.9	)%	(2.4	)%
Foreign tax rate differential	43.2	%	1.4	%	(0.1	)%
Permanent differences	(88.6	)%	(6.4	)%	2.0	%
Valuation allowance	(243.2	)%	(31.9	)%	(30.9	)%
Benefit from intraperiod tax allocation under ASC 740	265.9	%	—	%	32.2	%
Net (increase) decrease in unrecognized tax benefits	(11.4	)%	17.8	%	0.6	%
Benefit from settlement of litigation & audits	54.5	%	1.6	%	—	%
Other, net (primarily prior year return to provision)	110.5	%	6.6	%	(1.0	)%
Effective tax rate	115.9	%	19.2	%	35.4	%

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

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

(in millions)	2015			2014			2013
Current:
Federal	$	(0.8	)	$	(23.6	)	$	(14.5	)
State	(1.6		)	3.7			1.4
Foreign	7.1			4.0			9.6
Current income tax provision (benefit)	$	4.7		$	(15.9	)	$	(3.5	)
Deferred:
Federal	$	(8.7	)	$	—		$	(41.7	)
State	(3.0		)	—			—
Foreign	1.9			(0.2		)	(0.7		)
Deferred income tax benefit	$	(9.8	)	$	(0.2	)	$	(42.4	)
Income tax benefit	$	(5.1	)	$	(16.1	)	$	(45.9	)
Based on the income (loss) before income taxes:
Domestic	$	(33.2	)	$	(106.2	)	$	(152.8	)
Foreign	28.8			22.4			23.3
Loss before income taxes	$	(4.4	)	$	(83.8	)	$	(129.5	)

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)		2015			2014
Unrecognized tax benefits at January 1		$	23.1		$	27.6
Increases related to:
	Tax positions taken during a prior period	11.5			11.6
	Tax positions taken during the current period	0.3			0.5
Decreases related to:
	Tax positions taken during a prior period	—			(5.6		)
	Lapse of applicable statute of limitations	(3.2		)	(9.9		)
	Settlements with taxing authorities	(1.1		)	(1.1		)
Unrecognized tax benefits at December 31		$	30.6		$	23.1

Summary of Income Tax Examinations [Table Text Block]

Tax years that remain subject to examination for our major tax jurisdictions as of December 31, 2015:

Statute remains open	2005-2013
Tax years currently under examination/exam completed	2005-2013
Tax years not examined	2014-2015