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RETIREMENT AND POSTRETIREMENT BENEFIT PLANS - OBLIGATIONS AND FUNDED STATUS (Details) - USD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Aug. 31, 2018 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Amounts recognized in the consolidated balance sheet: |  |  |  |
Deferred credits and other liabilities — pension and postretirement obligations |  | $ (809) | $ (1,005) |
Changes in plan assets: |  |  |  |
Plan amendments | $ (178) |  |  |
Pension Benefits |  |  |  |
Amounts recognized in the consolidated balance sheet: |  |  |  |
Other assets |  | 60 | 82 |
Accrued liabilities |  | (25) | (5) |
Deferred credits and other liabilities — pension and postretirement obligations |  | (46) | (65) |
Total amount recognized in consolidated balance sheet |  | (11) | 12 |
Accumulated other comprehensive loss included the following after-tax balances: |  |  |  |
Net loss |  | 91 | 59 |
Prior service cost |  | 0 | 0 |
AOCI after-tax balances |  | 91 | 59 |
Changes in the benefit obligation: |  |  |  |
Benefit obligation — beginning of year |  | 391 | 399 |
Service cost — benefits earned during the period |  | 5 | 6 | $ 7
Interest cost on projected benefit obligation |  | 15 | 17 | 18
Actuarial (gain) loss |  | (19) | 14 |
Foreign currency exchange rate gain |  | (3) | 0 |
Liability gain due to curtailment |  | 0 | (2) |
Special termination benefits |  | 0 | 1 |
Benefits paid |  | (40) | (44) |
Settlements |  | 0 | 0 |
Benefit obligation — end of year |  | 349 | 391 | 399
Changes in plan assets: |  |  |  |
Fair value of plan assets — beginning of year |  | 403 | 386 |
Actual return on plan assets |  | (33) | 52 |
Foreign currency exchange rate loss |  | 0 | 0 |
Employer contributions |  | 8 | 9 |
Benefits paid |  | (40) | (44) |
Settlements |  | 0 | 0 |
Plan amendments |  | 0 | 0 |
Fair value of plan assets — end of year |  | 338 | 403 | 386
Funded/(Unfunded) status: |  | (11) | 12 |
Accumulated Benefit Obligation in Excess of Plan Assets |  |  |  |
Projected Benefit Obligation |  | 173 | 161 |
Accumulated Benefit Obligation |  | 169 | 157 |
Fair Value of Plan Assets |  | 98 | 91 |
Plan Assets in Excess of Accumulated Benefit Obligation |  |  |  |
Projected Benefit Obligation |  | 176 | 230 |
Accumulated Benefit Obligation |  | 176 | 230 |
Fair Value of Plan Assets |  | 240 | 312 |
Postretirement Benefits |  |  |  |
Amounts recognized in the consolidated balance sheet: |  |  |  |
Other assets |  | 0 | 0 |
Accrued liabilities |  | (45) | (59) |
Deferred credits and other liabilities — pension and postretirement obligations |  | (763) | (940) |
Total amount recognized in consolidated balance sheet |  | (808) | (999) |
Accumulated other comprehensive loss included the following after-tax balances: |  |  |  |
Net loss |  | 151 | 192 |
Prior service cost |  | (72) | 1 |
AOCI after-tax balances |  | 79 | 193 |
Changes in the benefit obligation: |  |  |  |
Benefit obligation — beginning of year |  | 999 | 950 |
Service cost — benefits earned during the period |  | 23 | 21 | 20
Interest cost on projected benefit obligation |  | 34 | 38 | 39
Actuarial (gain) loss |  | (90) | 61 |
Foreign currency exchange rate gain |  | 0 | 0 |
Liability gain due to curtailment |  | 0 | (9) |
Special termination benefits |  | 0 | 0 |
Benefits paid |  | (57) | (62) |
Settlements |  | 0 | 0 |
Benefit obligation — end of year |  | 808 | 999 | 950
Changes in plan assets: |  |  |  |
Fair value of plan assets — beginning of year |  | 0 | 0 |
Actual return on plan assets |  | 0 | 0 |
Foreign currency exchange rate loss |  | 0 | 0 |
Employer contributions |  | 0 | 0 |
Benefits paid |  | 0 | 0 |
Settlements |  | 0 | 0 |
Plan amendments |  | (101) | 0 |
Fair value of plan assets — end of year |  | 0 | 0 | $ 0
Funded/(Unfunded) status: |  | $ (808) | $ (999) |

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- Definition Amount of increase (decrease) in benefit obligation of defined benefit plan from change in terms of existing plan or initiation of new plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(7) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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- Definition Amount of payment to participant under defined benefit plan which decreases plan assets. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39716-114964 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(5) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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- Definition Amount of foreign currency translation gain (loss) which increases (decreases) plan assets of defined benefit plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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- Definition Amount of cost for actuarial present value of benefits attributed to service rendered by employee for 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)(1) -URI http://asc.fasb.org/extlink&oid=108410482&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=112275985&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)(1) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e2709-114920 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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- Definition Amount of (increase) decrease to benefit obligation of defined benefit plan from irrevocable action relieving primary responsibility for benefit obligation and eliminating risk for obligation and assets used to effect settlement. Includes, but is not limited to, lump-sum cash payment to participant in exchange for right to receive specified benefits, purchase of nonparticipating annuity contract and change from remeasurement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(10) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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- Definition Amount of payment, which decreases plan assets of defined benefit plan, for irrevocable action relieving primary responsibility for benefit obligation and eliminating risk for obligation and assets used to effect settlement. Transaction constituting settlement includes, but is not limited to, making lump-sum cash payment to participant in exchange for their rights to receive specified benefits and purchasing nonparticipating annuity contract. + 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 (b)(8) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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- Definition Amount of increase in benefit obligation for benefits provided to employees payable from defined benefit plan or payable upon retirement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(10) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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- Definition Amount of liability, recognized in statement of financial position, for defined benefit pension and other postretirement plans, classified as current. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109237824&loc=d3e1703-114919 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(20)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109237824&loc=d3e1731-114919 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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