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Income Taxes Income Taxes (Tables)
12 Months Ended
Dec. 31, 2018
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)
2018
2017
Depreciation
$
109.0

$
148.0

Deferred revenue
9.3

14.4

Intangibles
6.0

6.4

Gain on debt redemption

7.9

State taxes
19.9

22.1

Other
15.2

10.6

  Deferred tax liabilities
159.4

209.4

Claims and insurance
(84.8
)
(98.2
)
Net operating loss carryforwards
(199.9
)
(228.0
)
Employee benefit accruals
(88.9
)
(88.8
)
Sale/leaseback transactions
(54.5
)
(64.7
)
Other
(20.6
)
(31.7
)
  Deferred tax assets
(448.7
)
(511.4
)
Valuation allowance
291.1

305.1

  Net deferred tax assets
(157.6
)
(206.3
)
Net deferred tax liability
$
1.8

$
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:


2018
2017
2016
Federal statutory rate
21.0
 %
35.0
 %
35.0
 %
State income taxes, net
14.1
 %
(2.8
)%
2.9
 %
Foreign tax rate differential
12.1
 %
(10.0
)%
(3.3
)%
Permanent differences
8.3
 %
(8.9
)%
6.9
 %
Valuation allowance
(17.5
)%
(48.6
)%
(13.0
)%
Benefit from intraperiod tax allocation under ASC 740
 %
73.5
 %
 %
Net change in unrecognized tax benefits
(0.9
)%
0.5
 %
(10.2
)%
Other, net (primarily prior year return to provision)
(1.6
)%
1.6
 %
(5.7
)%
Effective tax rate
35.5
 %
40.3
 %
12.6
 %
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]
The income tax provision (benefit) consisted of the following:

(in millions)
2018
2017
2016
Current:
 
 
 
Federal
$

$
(0.9
)
$
(1.7
)
State
5.4

0.8

(0.7
)
Foreign
6.8

6.0

5.9

Current income tax expense
12.2

5.9

3.5

 
 
 
 
Deferred:
 
 
 
Federal

(13.3
)

State



Foreign
(1.1
)
0.1

(0.4
)
Deferred income tax benefit
(1.1
)
(13.2
)
(0.4
)
 
 
 
 
Income tax expense (benefit)
11.1

(7.3
)
3.1


 
 
 
Based on the income (loss) before income taxes:
 
 
 
Domestic
13.6

(30.5
)
3.9

Foreign
17.7

12.4

20.7

Income (Loss) before income taxes
$
31.3

$
(18.1
)
$
24.6

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)
2018
2017
Unrecognized tax benefits at January 1
$
56.8

$
45.3

 
 
 
 
Increases related to:
 
 
 
Tax positions taken during a prior period
7.1

11.8

 
Tax positions taken during the current period
0.4

0.4

 
 
 
 
Decreases related to:
 
 
 
Tax positions taken during a prior period
(0.1
)

 
Lapse of applicable statute of limitations
(4.8
)
(0.7
)
 
Settlements with taxing authorities
(0.2
)

 
 
 
 
Unrecognized tax benefits at December 31
$
59.2

$
56.8

Summary of Income Tax Examinations [Table Text Block]
Tax years that remain subject to examination for our major tax jurisdictions as of December 31, 2018:

Statute remains open
 
2005-2017
Tax years currently under examination/exam completed
 
2005-2013
Tax years not examined
 
2014-2018