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Taxes (Tables)
12 Months Ended
May 31, 2017
Income Tax And Non Income Tax Disclosure [Abstract]  
Schedule of income from continuing operations
The components of earnings from continuing operations before income taxes for the fiscal years ended May 31 are:
 
2017
 
2016
 
2015
United States
$
78.7

 
$
62.1

 
$
27.4

Non-United States
9.2

 
6.6

 
2.5

Total
$
87.9

 
$
68.7

 
$
29.9

Schedule of income tax expense (benefit)
The provision for income taxes from continuing operations for the fiscal years ended May 31 consists of the following components: 
 
2017
 
2016
 
2015
Federal
 

 
 

 
 

Current
$
8.3

 
$
(4.0
)
 
$
3.3

Deferred
17.7

 
19.2

 
5.3

Total federal
$
26.0

 
$
15.2

 
$
8.6

State and local
 

 
 

 
 

Current
$
1.8

 
$
4.1

 
$
1.2

Deferred
2.2

 
1.8

 
0.9

Total state and local
$
4.0

 
$
5.9

 
$
2.1

Non-United States
 

 
 

 
 

Current
$
5.4

 
$
4.1

 
$
4.7

Deferred

 
(0.5
)
 
(1.0
)
Total non-United States
$
5.4

 
$
3.6

 
$
3.7

Total
 

 
 

 
 

Current
$
15.5

 
$
4.2

 
$
9.2

Deferred
19.9

 
20.5

 
5.2

 Total current and deferred
$
35.4

 
$
24.7

 
$
14.4

Schedule of effective income tax rate reconciliation
A reconciliation of the significant differences between the effective income tax rate and the federal statutory rate on earnings from continuing operations before income taxes for the fiscal years ended May 31 is as follows:
 
2017
 
2016
 
2015
Computed federal statutory provision
35.0
 %
 
35.0
 %
 
35.0
 %
State income tax provision, net of federal income tax benefit
3.3

 
3.7

 
4.2

Difference in effective tax rates on earnings of foreign subsidiaries
0.0

 
1.2

 
3.7

Charitable contributions
(0.3
)
 
(0.4
)
 
(1.1
)
Tax credits
(0.5
)
 
(0.3
)
 
(0.5
)
Valuation allowances
0.1

 
(0.7
)
 
2.4

Uncertain Positions
2.9

 
3.9

 
11.5

Other - net
(0.2
)
 
(6.4
)
 
(7.0
)
Effective tax rates
40.3
 %
 
36.0
 %
 
48.2
 %
Total provision for income taxes
$
35.4

 
$
24.7

 
$
14.4

Schedule of deferred tax assets and liabilities
The significant components for deferred income taxes for the fiscal years ended May 31, including deferred income taxes related to discontinued operations, are as follows: 
 
2017
 
2016
Deferred tax assets
 

 
 

Tax uniform capitalization
$
9.5

 
$
6.2

Prepublication expenses
14.8

 
26.4

Inventory reserves
24.6

 
25.1

Allowance for doubtful accounts
3.3

 
4.2

Other reserves
26.0

 
26.3

Post-retirement, post-employment and pension obligations
12.5

 
15.9

Tax carryforwards
31.1

 
32.2

Lease accounting
(0.4
)
 
(0.4
)
Other - net
10.2

 
12.0

Gross deferred tax assets
131.6

 
147.9

Valuation allowance
(26.8
)
 
(28.4
)
Total deferred tax assets
$
104.8

 
$
119.5

Deferred tax liabilities
 

 
 

Prepaid expenses
(0.4
)
 
(0.6
)
Depreciation and amortization
(50.7
)
 
(50.4
)
Total deferred tax liability
$
(51.1
)
 
$
(51.0
)
Total net deferred tax assets
$
53.7

 
$
68.5

Schedule of unrecognized tax benefits rollforward
A reconciliation of the unrecognized tax benefits for the fiscal years ended May 31 is as follows: 
Gross unrecognized benefits at May 31, 2014
$
14.4

Decreases related to prior year tax positions
(0.7
)
Increase related to prior year tax positions

Increases related to current year tax positions
3.6

Settlements during the period

Lapse of statute of limitation

Gross unrecognized benefits at May 31, 2015
$
17.3

Decreases related to prior year tax positions
(6.2
)
Increase related to prior year tax positions
4.3

Increases related to current year tax positions
5.4

Settlements during the period
(2.9
)
Lapse of statute of limitation

Gross unrecognized benefits at May 31, 2016
$
17.9

Decreases related to prior year tax positions
(6.3
)
Increase related to prior year tax positions
0.1

Increases related to current year tax positions
3.0

Settlements during the period
(0.6
)
Lapse of statute of limitation

Gross unrecognized benefits at May 31, 2017
$
14.1