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Capital Stock, Earnings Per Share And Stock Issuance Capital Stock, Earnings Per Share And Stock Issuance (Details) - USD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Aug. 11, 2017 | Nov. 30, 2019 | Nov. 30, 2018 | Nov. 30, 2017
Class of Stock [Line Items] |  |  |  |
Maximum percentage of votes a holder of shares of Common Stock may cast out of the votes entitled to be cast by all holders of shares of Common Stock |  | 10.00% |  |
Stock repurchase program, authorized amount |  | $ 0.0 | $ 0.0 | $ 554.0
Minimum [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Minimum percentage a holder must acquire of each class of common stock not to be subject to our redemption rights |  | 90.00% |  |
Minimum percentage of votes a holder must control out of the votes entitled to be cast by all holders of shares of Common Stock to trigger the automatic conversion, on a share-for-share basis, of all shares of Common Stock Non-Voting into shares of Common Stock |  | 50.00% |  |
RB Foods [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Stock Repurchase Program, Remaining Authorized Repurchase Amount | 6,350,000 |  |  |
Stock repurchase program, authorized amount | $ 554.0 |  |  |
Over-Allotment Option [Member] | RB Foods [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Stock Repurchase Program, Remaining Authorized Repurchase Amount | 800,000 |  |  |

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