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Employee Benefit Plans (Tables)
 12 Months Ended
Nov. 25, 2018
Retirement Benefits [Abstract]  
Schedule of benefit obligations in excess of fair value of plan assets
The following tables summarize activity of the Company's defined benefit pension plans and postretirement benefit plans:
 
Pension Benefits
 
Postretirement Benefits
 
2018
 
2017
 
2018
 
2017
 
(Dollars in thousands)
Change in benefit obligation:
 
 
 
 
 
 
 
Benefit obligation at beginning of year
$
1,243,852

 
$
1,191,934

 
$
98,675

 
$
112,451

Service cost(1)
3,602

 
3,427

 
113

 
172

Interest cost
36,070

 
36,853

 
2,718

 
3,148

Plan participants' contribution
570

 
570

 
4,105

 
4,376

Actuarial (gain) loss(1)(2)
(69,602
)
 
65,669

 
(6,353
)
 
(5,516
)
Net curtailment loss
113

 
132

 
—

 
—

Impact of foreign currency changes
(6,983
)
 
15,545

 
—

 
—

Plan settlements
(63
)
 
(410
)
 
—

 
—

Net benefits paid
(70,839
)
 
(69,868
)
 
(16,351
)
 
(15,956
)
Benefit obligation at end of year
$
1,136,720

 
$
1,243,852

 
$
82,907

 
$
98,675

 
 
 
 
 
 
 
 
Change in plan assets:
 
 
 
 
 
 
 
Fair value of plan assets at beginning of year
948,706

 
837,322

 
—

 
—

Actual (loss) return on plan assets(3)
(36,468
)
 
117,188

 
—

 
—

Employer contribution(4)
122,492

 
52,386

 
12,246

 
11,580

Plan participants' contributions
570

 
570

 
4,105

 
4,376

Plan settlements
(63
)
 
(410
)
 
—

 
—

Impact of foreign currency changes
(5,822
)
 
11,518

 
—

 
—

Net benefits paid
(70,839
)
 
(69,868
)
 
(16,351
)
 
(15,956
)
Fair value of plan assets at end of year
958,576

 
948,706

 
—

 
—

Unfunded status at end of year
$
(178,144
)
 
$
(295,146
)
 
$
(82,907
)
 
$
(98,675
)
_____________
(1)
Classification of service cost and actuarial loss related to U.S. and U.K. pension plans for 2017 have been conformed to the 2018 presentation.
(2)
2018 actuarial gains and 2017 actuarial losses in the Company's pension benefit plans resulted from changes in discount rate assumptions. Changes in financial markets during 2018 including an increase in corporate bond yield indices, resulted in a decrease in benefit obligations. Changes in financial markets during 2017 including a decrease in corporate bond yield indices, resulted in an increase in benefit obligations.
(3)
The decrease in return on plan assets in the Company's pension benefit plans in 2018 was primarily due to worse-than-expected asset performance of U.S. and international equity securities.
(4)
The increase in employer contributions to the Company's pension benefit plans is due to additional planned contributions made during the year.
Schedule of amounts recognized in balance sheet
Amounts recognized in the Company's consolidated balance sheets as of November 25, 2018 and November 26, 2017, consist of the following:
 
Pension Benefits
 
Postretirement Benefits
 
2018
 
2017
 
2018
 
2017
 
(Dollars in thousands)
Unfunded status recognized on the balance sheet:
 
 
 
 
 
 
 
Prepaid benefit cost
$
22,738

 
$
24,644

 
$
—

 
$
—

Accrued benefit liability – current portion
(9,390
)
 
(9,316
)
 
(8,725
)
 
(9,427
)
Accrued benefit liability – long-term portion
(191,491
)
 
(310,474
)
 
(74,182
)
 
(89,248
)
 
$
(178,143
)
 
$
(295,146
)
 
$
(82,907
)
 
$
(98,675
)
 
 
 
 
 
 
 
 
Accumulated other comprehensive loss:
 
 
 
 
 
 
 
Net actuarial loss
$
(365,424
)
 
$
(362,602
)
 
$
(14,652
)
 
$
(21,878
)
Net prior service benefit
351

 
419

 
—

 
—

 
$
(365,073
)
 
$
(362,183
)
 
$
(14,652
)
 
$
(21,878
)
Schedule of accumulated benefit obligations in excess of fair value of plan assets
Information for the Company's defined benefit plans with an accumulated or projected benefit obligation in excess of plan assets is as follows:
 
Pension Benefits
 
2018
 
2017
 
(Dollars in thousands)
Accumulated benefit obligations in excess of plan assets:
 
 
 
Aggregate accumulated benefit obligation
$
986,084

 
$
1,091,856

Aggregate fair value of plan assets
792,427

 
775,859

 
 
 
 
Projected benefit obligations in excess of plan assets:
 
 
 
Aggregate projected benefit obligation
$
1,028,074

 
$
1,131,873

Aggregate fair value of plan assets
827,193

 
812,082
Schedule of defined benefit plans disclosures
The components of the Company's net periodic benefit cost were as follows:
 
Pension Benefits
 
Postretirement Benefits
 
2018
 
2017
 
2016
 
2018
 
2017
 
2016
 
(Dollars in thousands)
Net periodic benefit cost:
 
 
 
 
 
 
 
 
 
 
 
Service cost(1)
$
3,602

 
$
3,427

 
$
2,701

 
$
113

 
$
172

 
$
200

Interest cost
36,070

 
36,853

 
37,819

 
2,718

 
3,148

 
3,223

Expected return on plan assets(1)
(48,830
)
 
(42,033
)
 
(42,889
)
 
—

 
—

 
—

Amortization of prior service benefit
(65
)
 
(62
)
 
(61
)
 
—

 
—

 
—

Amortization of actuarial gain / loss
12,650

 
13,489

 
12,036

 
872

 
1,271

 
2,967

Curtailment (gain) loss
38

 
106

 
(140
)
 
—

 
—

 
—

Net settlement (gain) loss
(102
)
 
126

 
49

 
—

 
—

 
—

Net periodic benefit cost
3,363

 
11,906

 
9,515

 
3,703

 
4,591

 
6,390

Changes in accumulated other comprehensive loss:
 
 
 
 
 
 
 
 
 
 
 
Actuarial loss (gain)
15,373

 
(9,785
)
 
32,187

 
(6,354
)
 
(5,516
)
 
5,556

Amortization of prior service benefit
65

 
62

 
61

 
—

 
—

 
—

Amortization of actuarial gain / loss
(12,650
)
 
(13,489
)
 
(12,036
)
 
(872
)
 
(1,271
)
 
(2,967
)
Curtailment gain
—

 
—

 
173

 
—

 
—

 
—

Net settlement gain (loss)
102

 
(126
)
 
(49
)
 
—

 
—

 
—

Total recognized in accumulated other comprehensive loss
2,890

 
(23,338
)
 
20,336

 
(7,226
)
 
(6,787
)
 
2,589

Total recognized in net periodic benefit cost and accumulated other comprehensive loss
$
6,253

 
$
(11,432
)
 
$
29,851

 
$
(3,523
)
 
$
(2,196
)
 
$
8,979

_____________
(1)
Classification of service cost and expected return on plan assets related to U.S. and U.K. pension plans for 2017 and 2016 have been conformed to the 2018 presentation.
Schedule of assumptions used
Assumptions used in accounting for the Company's benefit plans were as follows:
 
Pension Benefits
 
Postretirement Benefits
 
2018
 
2017
 
2016
 
2018
 
2017
 
2016
Weighted-average assumptions used to determine net periodic benefit cost:
 
 
 
 
 
 
 
 
 
 
 
Discount rate
3.4%
 
3.8%
 
4.0%
 
3.4%
 
3.7%
 
3.8%
Expected long-term rate of return on plan assets
5.4%
 
5.8%
 
5.9%
 
 
 
 
 
 
Rate of compensation increase
3.4%
 
3.4%
 
3.4%
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Weighted-average assumptions used to determine benefit obligations:
 
 
 
 
 
 
 
 
 
 
 
Discount rate
4.1%
 
3.4%
 
3.8%
 
4.2%
 
3.4%
 
3.7%
Rate of compensation increase
3.4%
 
3.4%
 
3.4%
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Assumed health care cost trend rates were as follows:
 
 
 
 
 
 
 
 
 
 
 
Health care trend rate assumed for next year
 
 
 
 
 
 
5.9%
 
6.3%
 
6.4%
Rate trend to which the cost trend is assumed to decline
 
 
 
 
 
 
4.4%
 
4.4%
 
4.4%
Year that rate reaches the ultimate trend rate
 
 
 
 
 
 
2037
 
2037
 
2038
Fair values of pension plan assets
The fair value of the Company's pension plan assets by asset class are as follows:
 
Year Ended November 25, 2018
Asset Class
Total
 
Quoted Prices in Active Markets for Identical Assets (Level 1)
 
Significant Observable Inputs
(Level 2)
 
Significant Unobservable Inputs
(Level 3)
 
(Dollars in thousands)
Cash and cash equivalents
$
3,818

 
$
3,818

 
$
—

 
$
—

Equity securities(1)
 
 

 

 

U.S. large cap
91,663

 
—

 
91,663

 
—

U.S. small cap
10,871

 
—

 
10,871

 
—

International
86,974

 
—

 
86,974

 
—

Fixed income securities(2)
714,034

 
—

 
714,034

 
—

Other alternative investments


 


 

 

Real estate(3)
35,265

 
—

 
35,265

 
—

Private equity(4)
383

 
—

 
—

 
383

Hedge fund(5)
11,389

 
—

 
11,389

 
—

Other(6)
4,179

 
—

 
4,179

 
—

Total investments at fair value
$
958,576

 
$
3,818

 
$
954,375

 
$
383

 
Year Ended November 26, 2017
Asset Class
Total
 
Quoted Prices in Active Markets for Identical Assets (Level 1)
 
Significant Observable Inputs
(Level 2)
 
Significant Unobservable Inputs
(Level 3)
 
(Dollars in thousands)
Cash and cash equivalents
$
1,164

 
$
1,164

 
$
—

 
$
—

Equity securities(1)
 
 
 
 
 
 
 
U.S. large cap
209,568

 
—

 
209,568

 
—

U.S. small cap
42,874

 
—

 
42,874

 
—

International
141,924

 
—

 
141,924

 
—

Fixed income securities(2)
463,617

 
—

 
463,617

 
—

Other alternative investments
 
 
 
 
 
 
 
Real estate(3)
69,546

 
—

 
69,546

 
—

Private equity(4)
764

 
—

 
—

 
764

Hedge fund(5)
14,934

 
—

 
14,934

 
—

Other(6)
4,315

 
—

 
4,315

 
—

Total investments at fair value
$
948,706

 
$
1,164

 
$
946,778

 
$
764

_____________
(1)
Primarily comprised of equity index funds that track various market indices.
(2)
Predominantly includes bond index funds that invest in long-term U.S. government and investment grade corporate bonds.
(3)
Primarily comprised of investments in U.S. Real Estate Investment Trusts.
(4)
Represents holdings in a diversified portfolio of private equity funds and direct investments in companies located primarily in North America. Fair values are determined by investment fund managers using primarily unobservable market data.
(5)
Primarily invested in a diversified portfolio of equities, bonds, alternatives and cash with a low tolerance for capital loss.
(6)
Primarily relates to accounts held and managed by a third-party insurance company for employee-participants in Belgium. Fair values are based on accumulated plan contributions plus a contractually-guaranteed return plus a share of any incremental investment fund profits.
Schedule of expected benefit payments
The Company's estimated future benefit payments to participants, which reflect expected future service, as appropriate are anticipated to be paid as follows:
 
Pension Benefits
 
Postretirement Benefits
 
Total
 
(Dollars in thousands)
2019
$
68,292

 
$
10,413

 
$
78,705

2020
67,640

 
9,995

 
77,635

2021
68,115

 
9,633

 
77,748

2022
69,933

 
9,172

 
79,105

2023
70,040

 
8,579

 
78,619

2024-2028
355,238

 
34,622

 
389,860