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RESTRUCTURING ACTIVITIES - Narrative (Details) - USD ($) $ in Millions | 6 Months Ended | 12 Months Ended
--- | --- | ---
May 26, 2019 | May 26, 2019 | May 27, 2018 | May 28, 2017
Pinnacle Integration Restructuring Plan |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Charges expected to be incurred | $ 360.0 | $ 360.0 |  |
Cash charges | 285.0 | 285.0 |  |
Non-cash charges | 75.0 | 75.0 |  |
Capital expenditures expected to be incurred | 85.0 | 85.0 |  |
Charges incurred or expected to be incurred | 260.1 | 260.1 |  |
Charges that have resulted or will result in cash outflows | 254.0 | 163.5 |  |
Non-cash charges anticipated to be recognized | 6.1 | $ 4.7 |  |
Period over which costs are expected to be incurred |  | 3 years |  |
Restructuring and related cost, incurred cost |  | $ 168.2 |  |
Conagra Restructuring Plan |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Cash charges | 2.4 | 2.4 |  |
Non-cash charges | 1.9 | 1.9 |  |
Charges incurred or expected to be incurred | 4.3 | 4.3 |  |
Charges that have resulted or will result in cash outflows |  | 1.4 |  |
Non-cash charges anticipated to be recognized |  | 0.8 |  |
Restructuring and related cost, incurred cost |  | 2.2 |  |
SCAE Plan |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Cash charges | 321.0 | 321.0 |  |
Non-cash charges | 150.0 | 150.0 |  |
Charges incurred or expected to be incurred | 471.0 | 471.0 |  |
Restructuring and related cost, incurred cost |  | 9.6 | $ 38.0 | $ 63.6
Cumulative pre-tax expenses recognized | 469.9 | 469.9 |  |
Cash charges excluded from cumulative pre-tax expenses | 319.9 | 319.9 |  |
Non-cash charges excluded from cumulative pre-tax expenses | 150.0 | 150.0 |  |
Cost of goods sold | Pinnacle Integration Restructuring Plan |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Charges incurred or expected to be incurred | 5.7 | 5.7 |  |
Restructuring and related cost, incurred cost |  | 3.7 |  |
Cost of goods sold | SCAE Plan |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Cumulative pre-tax expenses recognized | 103.3 | 103.3 |  |
Selling, general and administrative expense | Pinnacle Integration Restructuring Plan |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Charges incurred or expected to be incurred | 254.4 | 254.4 |  |
Restructuring and related cost, incurred cost |  | 164.5 |  |
Selling, general and administrative expense | SCAE Plan |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Cumulative pre-tax expenses recognized | 364.3 | 364.3 |  |
Pension and postretirement non-service income | SCAE Plan |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Cumulative pre-tax expenses recognized | $ 2.3 | $ 2.3 |  |

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