Income Taxes Income Taxes (Tables)

12 Months Ended

Dec. 31, 2016

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)	2016			2015
Depreciation	$	229.5		$	256.3
Deferred revenue	15.8			13.9
Intangibles	8.9			16.2
Gain on debt redemption	25.7			38.5
State taxes	30.2			32.0
Other	31.5			27.5
Deferred tax liabilities	341.6			384.4
Claims and insurance	(149.6		)	(165.7		)
Net operating loss carryforwards	(302.9		)	(302.4		)
Employee benefit accruals	(201.8		)	(221.9		)
Sale/Leaseback transaction	(99.9		)	(107.0		)
Other	(46.0		)	(54.4		)
Deferred tax assets	(800.2		)	(851.4		)
Valuation allowance	461.7			470.5
Net deferred tax assets	(338.5		)	(380.9		)
Net deferred tax liability	$	3.1		$	3.5

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:

	2016		2015		2014
Federal statutory rate	35.0	%	35.0	%	35.0	%
State income taxes, net	2.9	%	(50.0	)%	(4.9	)%
Foreign tax rate differential	(3.3	)%	43.2	%	1.4	%
Permanent differences	6.9	%	(88.6	)%	(6.4	)%
Valuation allowance	(13.0	)%	(243.2	)%	(31.9	)%
Benefit from intraperiod tax allocation under ASC 740	—	%	265.9	%	—	%
Net change in unrecognized tax benefits	(10.2	)%	(11.4	)%	17.8	%
Benefit from settlement of litigation & audits	—	%	54.5	%	1.6	%
Other, net (primarily prior year return to provision)	(5.7	)%	110.5	%	6.6	%
Effective tax rate	12.6	%	115.9	%	19.2	%

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

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

(in millions)	2016			2015			2014
Current:
Federal	$	(1.7	)	$	(0.8	)	$	(23.6	)
State	(0.7		)	(1.6		)	3.7
Foreign	5.9			7.1			4.0
Current income tax provision (benefit)	$	3.5		$	4.7		$	(15.9	)
Deferred:
Federal	$	—		$	(8.7	)	$	—
State	—			(3.0		)	—
Foreign	(0.4		)	1.9			(0.2		)
Deferred income tax benefit	$	(0.4	)	$	(9.8	)	$	(0.2	)
Income tax provision (benefit)	$	3.1		$	(5.1	)	$	(16.1	)
Based on the income (loss) before income taxes:
Domestic	$	3.9		$	(33.2	)	$	(106.2	)
Foreign	20.7			28.8			22.4
Income (Loss) before income taxes	$	24.6		$	(4.4	)	$	(83.8	)

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)		2016			2015
Unrecognized tax benefits at January 1		$	30.6		$	23.1
Increases related to:
	Tax positions taken during a prior period	17.3			11.5
	Tax positions taken during the current period	0.4			0.3
Decreases related to:
	Tax positions taken during a prior period	—			—
	Lapse of applicable statute of limitations	(3.0		)	(3.2		)
	Settlements with taxing authorities	—			(1.1		)
Unrecognized tax benefits at December 31		$	45.3		$	30.6

Summary of Income Tax Examinations [Table Text Block]

Tax years that remain subject to examination for our major tax jurisdictions as of December 31, 2016:

Statute remains open	2005-2015
Tax years currently under examination/exam completed	2005-2013
Tax years not examined	2014-2016