Income Taxes (Tables)

12 Months Ended

Dec. 31, 2019

Income Tax Disclosure [Abstract]

Components of Deferred Tax Liabilities (Assets)

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

(in millions)	2019			2018
Depreciation	$	99.5		$	109.0
Right of use - leases		93.7			—
Deferred revenue		6.3			9.3
Intangibles		3.4			6.0
State taxes		19.6			19.9
Other		16.0			15.2
Deferred tax liabilities		238.5			159.4
Claims and insurance		(89.9	)		(84.8	)
Net operating loss carryforwards		(210.7	)		(199.9	)
Employee benefit accruals		(94.8	)		(88.9	)
Sale/leaseback transactions		(55.5	)		(54.5	)
Lease liabilities		(93.8	)		—
Other		(28.4	)		(20.6	)
Deferred tax assets		(573.1	)		(448.7	)
Valuation allowance		334.0			291.1
Net deferred tax assets		(239.1	)		(157.6	)
Net deferred tax (asset) liability	$	(0.6	)	$	1.8

Reconciliation between Federal Statutory Tax Rate and Consolidated Effective Tax Rate

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

	2019			2018			2017
Federal statutory rate		21.0	%		21.0	%		35.0	%
State income taxes, net		(0.7	%)		14.1	%		(2.8	)%
Foreign tax rate differential		(2.6	%)		12.1	%		(10.0	)%
Permanent differences		(0.6	%)		8.3	%		(8.9	)%
Valuation allowance		(17.7	)%		(17.5	)%		(48.6	)%
Benefit from intraperiod tax allocation under ASC 740		—	%		—	%		73.5	%
Net change in unrecognized tax benefits		0.6	%		(0.9	)%		0.5	%
Other, net (primarily prior year return to provision)		4.0	%		(1.6	)%		1.6	%
Effective tax rate		4.0	%		35.5	%		40.3	%

Summary of Income Tax Provision (Benefit)

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

(in millions)	2019			2018			2017
Current:
Federal	$	—		$	—		$	(0.9	)
State		(3.3	)		5.4			0.8
Foreign		2.0			6.8			6.0
Current income tax expense (benefit)		(1.3	)		12.2			5.9
Deferred:
Federal		—			—			(13.3	)
State		—			—			—
Foreign		(3.0	)		(1.1	)		0.1
Deferred income tax benefit		(3.0	)		(1.1	)		(13.2	)
Income tax expense (benefit)		(4.3	)		11.1			(7.3	)
Based on the income (loss) before income taxes:
Domestic		(104.7	)		13.6			(30.5	)
Foreign		(3.6	)		17.7			12.4
Income (Loss) before income taxes	$	(108.3	)	$	31.3		$	(18.1	)

Schedule of Unrecognized Tax Benefits Roll Forward

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

(in millions)	2019			2018
Unrecognized tax benefits at January 1	$	59.2		$	56.8
Increases related to:
Tax positions taken during a prior period		—			7.1
Tax positions taken during the current period		0.5			0.4
Decreases related to:
Tax positions taken during a prior period		(0.1	)		(0.1	)
Lapse of applicable statute of limitations		(1.1	)		(4.8	)
Settlements with taxing authorities		—			(0.2	)
Unrecognized tax benefits at December 31	$	58.5		$	59.2

Summary of Tax Years Remain Subject to Examination

Tax years that remain subject to examination for our major tax jurisdictions as of December 31, 2019:

Statute remains open	2005-2018
Tax years currently under examination/exam completed	2005-2013
Tax years not examined	2014-2019