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Employee Benefit Plans (Tables)
 12 Months Ended
Nov. 30, 2018
Defined Benefit Plan Disclosure [Line Items]  
Schedule of Accumulated Benefit Obligations in Excess of Fair Value of Plan Assets
Information regarding pension plans with accumulated benefit obligations in excess of plan assets is as follows:
 
2018
 
2017
 
(Dollars in millions)
U.S. Pension Plans:
 
 
 
Projected benefit obligation
$
247.7

 
$
275.9

Accumulated benefit obligation
$
247.7

 
$
275.9

Fair value of plan assets
$
206.9

 
$
216.5

Non-U.S. Pension Plans:
 
 
 
Projected benefit obligation
$
11.8

 
$
12.2

Accumulated benefit obligation
$
8.6

 
$
8.5

Fair value of plan assets
$
0.6

 
$
0.7
Schedule of Allocation of Plan Assets
Asset allocation at November 30, 2018, target allocation for 2018, and expected long-term rate of return by asset category are as follows:
Asset Category
Target
Allocation
 
Percentage of Plan Assets
At November 30,
2018
2018
 
2017
Equity securities
58
%
 
52
%
 
54
%
Fixed income securities
18
%
 
16
%
 
16
%
Collective trusts and other
24
%
 
32
%
 
30
%
Total
100
%
 
100
%
 
100
%
Schedule of Changes in Fair Value of Plan Assets [Table Text Block]

The following table summarizes, by level within the fair value hierarchy, the U.S. defined benefit plans’ assets at November 30, 2018 and November 30, 2017:
 
 
Total
 
Level 1
 
Level 2
 
Level 3
2018
 
 
 
(Dollars in millions)
 
 
Money market funds
 
$
0.1

 
$
0.1

 
$
—

 
$
—

Registered investment companies:
 
 
 
 
 
 
 
 
Equity mutual funds
 
108.4

 
108.4

 
—

 
—

Fixed income mutual funds
 
33.1

 
33.1

 
—

 
—

Total registered investment companies
 
$
141.6

 
$
141.6

 
$
—

 
$
—

Collective trust funds:
 
 
 
 
 
 
 
 
Core property collective
 
25.8

 
 
 
 
 
 
Structured credit collective
 
26.4

 
 
 
 
 
 
Energy debt collective
 
13.1

 
 
 
 
 
 
Total collective trust funds measured at NAV
 
65.3

 
 
 
 
 
 
 
 
$
206.9

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2017
 
 
 
 
 
 
 
 
Money market funds
 
$
0.1

 
$
0.1

 
$
—

 
$
—

Registered investment companies:
 
 
 
 
 
 
 
 
Equity mutual funds
 
117.6

 
117.6

 
—

 
—

Fixed income mutual funds
 
31.9

 
31.9

 
—

 
—

Total registered investment companies
 
149.5

 
149.5

 
—

 
—

Real estate partnerships
 
0.3

 
—

 
—

 
0.3

 
 
$
149.9

 
$
149.6

 
$
—

 
0.3

Collective trust funds:
 
 
 
 
 
 
 
 
Core property collective
 
23.7

 
 
 
 
 
 
Structured credit collective
 
30.6

 
 
 
 
 
 
Energy debt collective
 
12.3

 
 
 
 
 
 
Total collective trust funds measured at NAV
 
66.6

 
 
 
 
 
 
 
 
$
216.5

 
 
 
 
 
 
Reconciliation of Level 3 Measurements
A reconciliation of the beginning and ending Level 3 measurements is as follows:
 
Real Estate
Partnerships
 
(Dollars in millions)
Balance November 30, 2016
$
0.3

Redemptions
—

Unrealized net gains or losses included in funded status
—

Balance November 30, 2017
0.3

Redemptions
(0.2
)
Realized net gains or losses included in funded status
(0.1
)
Balance November 30, 2018
$
—
Schedule of the Plan's Investments With a Reported NAV
The following table summarizes the Plan’s investments with a reported NAV, which are measured at NAV as a practical expedient to estimate fair value and are not classified in the fair value hierarchy as of November 30, 2018 and 2017:
 
November 30,
 
2018
 
2017
 
(Dollars in millions)
SEI Structured Credit Collective Fund(a)
$
26.4

 
$
30.6

SEI Energy Debt Collective Investment Trust(b)
$
13.1

 
$
12.3

SEI Core Property Collective Investment Trust(c)
$
25.8

 
$
23.7



(a)
The SEI Structured Credit Collective Fund seeks to provide high general returns by investing in collateralized debt obligations (“CDO’s”) and other structured credit instruments. This fund requires a two-year non-redemption period after which investments can be redeemed at any time; however, a 90 day redemption notification period is required. The Plan has satisfied all funding obligations related to this investment and has surpassed the two-year non-redemption period.
(b)
The SEI Energy Debt Collective Investment Trust seeks to generate high total returns by primarily investing in debt securities of U.S. and international energy companies denominated in U.S. dollars. This trust will invest in investment grade bonds, below investment grade bonds, loans, rights issues, or equities of U.S. companies. Equity investments will be limited. In most cases, equity investments will be attached to a debt investment for extending credit or if received in a restructuring, though the Sub-Adviser is permitted to add-on to an existing equity position through a secondary market transaction.
(c)
The SEI Core Property Collective Investment Trust, seeks both current income and long-term capital appreciation through investing in underlying funds that acquire, manage, and dispose of commercial real estate properties. This trust expects to invest at least 85% of its assets in open-end core underlying funds focused on properties in the U.S. with "core" meaning high-quality, low-leveraged, income-generating office, industrial, retail, and multi-family properties, generally fully-leased to credit-worthy companies and governmental entities. Up to 5% of this trust's net assets may be invested in liquid real estate strategies (publicly-traded REITs) for cash management purposes and the fund may have up to a 15% allocation to non-core sectors and strategies.
Schedule of Expected Benefit Payments
Estimated future benefit payments for the retiree health care plans are as follows:
 
Benefit
Payments
 
(Dollars in millions)
2019
$
0.6

2020
0.6

2021
0.6

2022
0.6

2023
0.5

2024 - 2028
2.1
Pension Plan [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Changes in Projected Benefit Obligations, Fair Value of Plan Assets, and Funded Status of Plan [Table Text Block]
Changes in benefit obligations and plan assets are as follows:
 
2018
 
2017
 
(Dollars in millions)
Change in Benefit Obligation:
 
 
 
Benefit obligation at beginning of year
$
288.1

 
$
280.8

Service cost
2.6

 
2.8

Interest cost
9.0

 
9.3

Actuarial loss (gain)
(21.6
)
 
14.0

Settlement
—

 
(0.4
)
Benefits and expenses paid net of retiree contributions
(18.1
)
 
(19.6
)
Exchange rate changes
(0.5
)
 
1.2

Benefit Obligation at End of Year
259.5

 
288.1

 
 
 
 
Change in Plan Assets:
 
 
 
Fair value of plan assets at beginning of year
217.2

 
197.1

Actual return on assets
2.1

 
32.3

Employer contributions
6.3

 
7.6

Exchange rate changes
—

 
0.1

Benefits and expenses paid
(18.1
)
 
(19.9
)
Fair Value of Plan Assets at End of Year
207.5

 
217.2

Funded Status at November 30
$
(52.0
)
 
$
(70.9
)
Amounts Recognized in the Consolidated Balance Sheets:
 
 
 
Current liability
$
(0.4
)
 
$
(0.4
)
Non-current liability
(51.6
)
 
(70.5
)
Net Amount Recognized
$
(52.0
)
 
$
(70.9
)
Schedule of Net Periodic Benefit Cost Not yet Recognized [Table Text Block]
As of November 30, 2018 and 2017, the amounts included in Accumulated Other Comprehensive Income (Loss) that have not yet been recognized in net periodic benefit cost consist of:
 
2018
 
2017
 
(Dollars in millions)
Net actuarial loss
$
(119.7
)
 
$
(133.2
)


The after-tax amount of unrecognized net actuarial loss at November 30, 2018 was $105.1 million. The estimated net loss for defined benefit plans that will be amortized from Accumulated Other Comprehensive Loss during 2019 is $4.6 million.
Schedule of Net Benefit Costs [Table Text Block]
Net Periodic Benefit Cost 

Net periodic benefit cost (income) consisted of the following for the years ended November 30:
 
2018
 
2017
 
2016
 
(Dollars in millions)
Net Periodic Benefit Cost:
 
 
 
 
 
Service costs for benefits earned
$
2.6

 
$
2.8

 
$
1.8

Interest costs on benefit obligation
9.0

 
9.3

 
9.6

Assumed return on plan assets
(15.7
)
 
(15.3
)
 
(15.3
)
Amortization of net loss
5.4

 
4.9

 
4.6

Curtailment and settlement (gain) loss
—

 
0.4

 
(0.1
)
Total
$
1.3

 
$
2.1

 
$
0.6
Schedule of Assumptions Used
Weighted average assumptions used to measure the benefit obligation for the Company’s defined benefit plans as of November 30, 2018 and 2017 were as follows:
 
Pension Plans
 
2018
 
2017
Weighted Average Assumptions:
 
 
 
Discount rate used for liability determination
4.41
%
 
3.66
%
Annual rates of salary increase (non-U.S. plans)
3.35
%
 
3.47
%

Weighted average assumptions used to measure the net periodic benefit cost for the Company’s defined benefit plans as of November 30, 2018, 2017, and 2016 were as follows:
 
Pension Plans
 
2018
 
2017
 
2016
Weighted Average Assumptions:
 
 
 
 
 
Discount rate used for expense determination
3.66
%
 
4.12
%
 
4.29
%
Assumed long-term rate of return on plan assets
7.68
%
 
7.68
%
 
7.70
%
Annual rates of salary increase (non-U.S. plans)
3.47
%
 
3.44
%
 
3.77
%
Other Postretirement Benefit Plans, Defined Benefit [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Changes in Projected Benefit Obligations, Fair Value of Plan Assets, and Funded Status of Plan [Table Text Block]
Changes in benefit obligations are as follows:
 
2018
 
2017
 
(Dollars in millions)
Change in Benefit Obligation:
 
 
 
Benefit obligation at beginning of year
$
6.9

 
$
6.9

Interest cost
0.2

 
0.2

Actuarial (gain) loss
(0.4
)
 
0.4

Benefits paid net of retiree contributions
(0.8
)
 
(0.6
)
Benefit Obligation at End of Year
5.9

 
6.9

 
 
 
 
Change in Plan Assets:
 
 
 
Fair value of plan assets at beginning of year
—

 
—

Employer contributions
0.8

 
0.6

Benefits and expenses paid, net of retiree contributions
(0.8
)
 
(0.6
)
Fair Value of Plan Assets at End of Year
—

 
—

Funded Status at November 30
$
(5.9
)
 
$
(6.9
)
 
 
 
 
Amounts Recognized in the Consolidated Balance Sheets:
 
 
 
Current liability
$
(0.6
)
 
$
(0.6
)
Non-current liability
(5.3
)
 
(6.3
)
Net Amount Recognized
$
(5.9
)
 
$
(6.9
)
Schedule of Net Periodic Benefit Cost Not yet Recognized [Table Text Block]
As of November 30, 2018 and 2017, the amounts included in Accumulated Other Comprehensive Income (Loss) that have not been recognized in net periodic benefit cost consist of:
 
 
2018
 
2017
 
(Dollars in millions)
Net actuarial gain
$
10.6

 
$
11.1

Prior service credit
$
—

 
$
—


    
The after-tax amount of unrecognized net actuarial gain at November 30, 2018 was $15.7 million. The estimated net gain for post retirement health care plans that will be amortized from Accumulated Other Comprehensive Loss during 2019 is $1.3 million.
Schedule of Net Benefit Costs [Table Text Block]
Net periodic benefit cost (income) consisted of the following for the years ended, November 30:
 
2018
 
2017
 
2016
 
(Dollars in millions)
Interest costs on benefit obligation
$
0.2

 
$
0.2

 
$
0.2

Amortization of net gain
(0.9
)
 
(1.0
)
 
(1.0
)
Total
$
(0.7
)
 
$
(0.8
)
 
$
(0.8
)
Schedule of Assumptions Used
Assumptions 
 
2018
 
2017
 
2016
Weighted Average Assumptions:
 
 
 
 
 
Discount rate used for liability determination
4.41
%
 
3.62
%
 
4.00
%
Discount rate used for expense determination
3.62
%
 
4.00
%
 
4.15
%
Current health care cost trend rate assumed for the next year
7.10
%
 
7.60
%
 
8.00
%
Ultimate trend rate for health care costs
4.50
%
 
4.50
%
 
4.50
%
Year reached
2037

 
2037

 
2037