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Employee Benefit Plans - Fair values of pension plan assets (Details) - USD ($)
$ in Millions
Nov. 27, 2022
Nov. 28, 2021
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets $ 5.7 $ 2.4
Significant Observable Inputs (Level 2) [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 832.8 1,126.6
Significant Unobservable Inputs (Level 3) [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 0.0 0.2
Cash and cash equivalents [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 5.7 2.4
Cash and cash equivalents [Member] | Significant Observable Inputs (Level 2) [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 0.0 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 0.0
U.S. large cap [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 0.0 0.0
U.S. large cap [Member] | Significant Observable Inputs (Level 2) [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 42.8 54.1
U.S. large cap [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 0.0 0.0
U.S. small cap [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 0.0 0.0
U.S. small cap [Member] | Significant Observable Inputs (Level 2) [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 6.6 7.7
U.S. small cap [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 0.0 0.0
International [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 0.0 0.0
International [Member] | Significant Observable Inputs (Level 2) [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 69.8 87.8
International [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 0.0 0.0
Fixed income securities [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 0.0 0.0
Fixed income securities [Member] | Significant Observable Inputs (Level 2) [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 687.7 939.9
Fixed income securities [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 0.0 0.0
Real estate [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 0.0 0.0
Real estate [Member] | Significant Observable Inputs (Level 2) [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 14.5 20.7
Real estate [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 0.0 0.0
Private equity [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets   0.0
Private equity [Member] | Significant Observable Inputs (Level 2) [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   0.2
Hedge funds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 0.0 0.0
Hedge funds [Member] | Significant Observable Inputs (Level 2) [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 7.4 12.5
Hedge funds [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 0.0 0.0
Other [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 0.0 0.0
Other [Member] | Significant Observable Inputs (Level 2) [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 4.0 3.9
Other [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 0.0 0.0
Fair Value [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 838.5 1,129.2
Fair Value [Member] | Cash and cash equivalents [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 5.7 2.4
Fair Value [Member] | U.S. large cap [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 42.8 54.1
Fair Value [Member] | U.S. small cap [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 6.6 7.7
Fair Value [Member] | International [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 69.8 87.8
Fair Value [Member] | Fixed income securities [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 687.7 939.9
Fair Value [Member] | Real estate [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 14.5 20.7
Fair Value [Member] | Private equity [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets   0.2
Fair Value [Member] | Hedge funds [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 7.4 12.5
Fair Value [Member] | Other [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets $ 4.0 $ 3.9