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DERIVATIVE FINANCIAL INSTRUMENTS - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Feb. 23, 2020 | Feb. 24, 2019 | Nov. 25, 2018 | Feb. 23, 2020 | Feb. 24, 2019 | Nov. 24, 2019 | Aug. 25, 2019 | May 26, 2019 | Aug. 26, 2018 | May 27, 2018
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |  |  |  |  |
Period to hedge portion of anticipated consumption of commodity inputs (up to) |  |  |  | 36 months |  |  |  |  |  |
Gain recognized in other comprehensive income | $ (0.3) | $ (1.8) |  | $ (3.0) | $ 46.2 |  |  |  |  |
Deferred gain in AOCI upon settlement of contracts | 7,863.9 | $ 7,451.5 | $ 7,303.3 | 7,863.9 | $ 7,451.5 | $ 7,690.6 | $ 7,516.8 | $ 7,463.7 | $ 3,815.0 | $ 3,756.6
Setoff amounts applied against total derivative assets | 1.0 |  |  | 1.0 |  |  |  | 0.5 |  |
Setoff amounts applied against total derivative liabilities | 3.0 |  |  | 3.0 |  |  |  | 0.4 |  |
Prepaid expenses and other current assets |  |  |  |  |  |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |  |  |  |  |
Amounts representing a right to reclaim cash collateral | 4.0 |  |  | 4.0 |  |  |  |  |  |
Amounts representing an obligation to return cash collateral |  |  |  |  |  |  |  | 0.1 |  |
Cash flow hedge, Pinnacle |  |  |  |  |  |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |  |  |  |  |
Gain recognized in other comprehensive income |  |  | $ 47.5 |  |  |  |  |  |  |
Commodity contracts | Purchase contracts |  |  |  |  |  |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |  |  |  |  |
Notional value of contracts | 91.3 |  |  | 91.3 |  |  |  | 140.1 |  |
Commodity contracts | Sales contracts |  |  |  |  |  |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |  |  |  |  |
Notional value of contracts | 62.0 |  |  | 62.0 |  |  |  | 18.5 |  |
Foreign exchange contracts |  |  |  |  |  |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |  |  |  |  |
Notional value of contracts | 97.6 |  |  | 97.6 |  |  |  | 88.2 |  |
Accumulated Gain (Loss), Net, Cash Flow Hedge |  |  |  |  |  |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |  |  |  |  |
Deferred gain in AOCI upon settlement of contracts | 29.9 |  |  | 29.9 |  |  |  | $ 34.0 |  |
Accumulated Gain (Loss), Net, Cash Flow Hedge | Cash flow hedge, Pinnacle |  |  |  |  |  |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |  |  |  |  |
Deferred gain in AOCI upon settlement of contracts | $ 42.9 |  |  | $ 42.9 |  |  |  |  |  |

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