Employee Benefit Plans - Fair values of pension plan assets (Detail) - USD ($)
$ in Thousands |
Nov. 27, 2016 |
Nov. 29, 2015 |
| Level 1 Inputs [Member] |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Fair value of plan assets |
$ 2,676
|
$ 1,706
|
| Level 2 Inputs [Member] |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Fair value of plan assets |
833,302
|
835,125
|
| Significant Unobservable Inputs (Level 3) [Member] |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Fair value of plan assets |
1,344
|
1,720
|
| Cash and cash equivalents [Member] | Level 1 Inputs [Member] |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Fair value of plan assets |
2,676
|
1,706
|
| Cash and cash equivalents [Member] | Level 2 Inputs [Member] |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Fair value of plan assets |
0
|
0
|
| Cash and cash equivalents [Member] | Significant Unobservable Inputs (Level 3) [Member] |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Fair value of plan assets |
0
|
0
|
| U.S. large cap [Member] | Level 1 Inputs [Member] |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Fair value of plan assets |
0
|
0
|
| U.S. large cap [Member] | Level 2 Inputs [Member] |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Fair value of plan assets |
190,811
|
185,526
|
| U.S. large cap [Member] | Significant Unobservable Inputs (Level 3) [Member] |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Fair value of plan assets |
0
|
0
|
| U.S. small cap [Member] | Level 1 Inputs [Member] |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Fair value of plan assets |
0
|
0
|
| U.S. small cap [Member] | Level 2 Inputs [Member] |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Fair value of plan assets |
37,434
|
31,935
|
| U.S. small cap [Member] | Significant Unobservable Inputs (Level 3) [Member] |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Fair value of plan assets |
0
|
0
|
| International [Member] | Level 1 Inputs [Member] |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Fair value of plan assets |
0
|
0
|
| International [Member] | Level 2 Inputs [Member] |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Fair value of plan assets |
144,241
|
133,298
|
| International [Member] | Significant Unobservable Inputs (Level 3) [Member] |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Fair value of plan assets |
0
|
0
|
| Fixed income securities [Member] | Level 1 Inputs [Member] |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Fair value of plan assets |
0
|
0
|
| Fixed income securities [Member] | Level 2 Inputs [Member] |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Fair value of plan assets |
395,995
|
415,228
|
| Fixed income securities [Member] | Significant Unobservable Inputs (Level 3) [Member] |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Fair value of plan assets |
0
|
0
|
| Real estate [Member] | Level 1 Inputs [Member] |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Fair value of plan assets |
0
|
0
|
| Real estate [Member] | Level 2 Inputs [Member] |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Fair value of plan assets |
53,783
|
58,364
|
| Real estate [Member] | Significant Unobservable Inputs (Level 3) [Member] |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Fair value of plan assets |
0
|
0
|
| Private equity [Member] | Level 1 Inputs [Member] |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Fair value of plan assets |
0
|
0
|
| Private equity [Member] | Level 2 Inputs [Member] |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Fair value of plan assets |
0
|
0
|
| Private equity [Member] | Significant Unobservable Inputs (Level 3) [Member] |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Fair value of plan assets |
1,344
|
1,720
|
| Hedge funds [Member] | Level 1 Inputs [Member] |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Fair value of plan assets |
0
|
0
|
| Hedge funds [Member] | Level 2 Inputs [Member] |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Fair value of plan assets |
7,337
|
7,488
|
| Hedge funds [Member] | Significant Unobservable Inputs (Level 3) [Member] |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Fair value of plan assets |
0
|
0
|
| Other [Member] | Level 1 Inputs [Member] |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Fair value of plan assets |
0
|
0
|
| Other [Member] | Level 2 Inputs [Member] |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Fair value of plan assets |
3,701
|
3,286
|
| Other [Member] | Significant Unobservable Inputs (Level 3) [Member] |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Fair value of plan assets |
0
|
0
|
| Fair Value [Member] |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Fair value of plan assets |
837,322
|
838,551
|
| Fair Value [Member] | Cash and cash equivalents [Member] |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Fair value of plan assets |
2,676
|
1,706
|
| Fair Value [Member] | U.S. large cap [Member] |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Fair value of plan assets |
190,811
|
185,526
|
| Fair Value [Member] | U.S. small cap [Member] |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Fair value of plan assets |
37,434
|
31,935
|
| Fair Value [Member] | International [Member] |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Fair value of plan assets |
144,241
|
133,298
|
| Fair Value [Member] | Fixed income securities [Member] |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Fair value of plan assets |
395,995
|
415,228
|
| Fair Value [Member] | Real estate [Member] |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Fair value of plan assets |
53,783
|
58,364
|
| Fair Value [Member] | Private equity [Member] |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Fair value of plan assets |
1,344
|
1,720
|
| Fair Value [Member] | Hedge funds [Member] |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Fair value of plan assets |
7,337
|
7,488
|
| Fair Value [Member] | Other [Member] |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Fair value of plan assets |
$ 3,701
|
$ 3,286
|