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BENEFIT PLANS - COMPONENTS OF NET PERIODIC BENEFIT COSTS (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Aug. 17, 2019 | Aug. 18, 2018 | Aug. 17, 2019 | Aug. 18, 2018
Pension Benefits |  |  |  |
Components of net periodic benefit cost: |  |  |  |
Service cost | $ 7 | $ 5 | $ 17 | $ 21
Interest cost | 32 | 31 | 73 | 73
Expected return on plan assets | (41) | (40) | (97) | (94)
Amortization of: |  |  |  |
Actuarial loss (gain) | 15 | 16 | 31 | 41
Net periodic benefit cost | 13 | 12 | 24 | 41
Other Benefits |  |  |  |
Components of net periodic benefit cost: |  |  |  |
Service cost | 2 | 2 | 4 | 4
Interest cost | 2 | 2 | 4 | 4
Amortization of: |  |  |  |
Prior service cost | (2) | (3) | (5) | (6)
Actuarial loss (gain) | $ (2) | (2) | (5) | (5)
Net periodic benefit cost |  | $ (1) | $ (2) | $ (3)

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- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(4) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=118257860&loc=d3e4179-114921 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920 + Details
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