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BENEFIT PLANS - Reconciliation of Funded Status of Basic Employee Defined-Benefit Pension Plans (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Other Postretirement Benefit Plans, Defined Benefit |  |  |  |  |
Projected benefit obligation: |  |  |  |  |
Benefit obligation, beginning of year |  | $ 37 |  | $ 36 |
Service cost |  | 0 |  | 0 | $ 0
Interest cost |  | 1 |  | 1 | 1
Actuarial (gain) loss |  | 4 |  | 4 |
Benefits and expenses paid |  | (3) |  | (4) |
Effect of foreign exchange rate changes |  | 0 |  | 0 |
Benefit obligation, end of year |  | 39 |  | 37 | 36
Plan assets: |  |  |  |  |
Fair value of plan assets, beginning of year |  | 0 |  | 0 |
Actual return on plan assets |  | 0 |  | 0 |
Employer contributions |  | 3 |  | 4 |
Benefits and expenses paid |  | (3) |  | (4) |
Effect of foreign exchange rate changes |  | 0 |  | 0 |
Fair value of plan assets, end of year |  | 0 |  | 0 | 0
Funded status of the plans | [1] | (39) |  | (37) |
Amounts recognized in accumulated other comprehensive income: |  |  |  |  |
Net actuarial (gain) loss |  | 12 |  | 9 |
Prior service (credit) cost |  | 0 |  | 0 |
Total included in accumulated other comprehensive income |  | 12 |  | 9 |
Japan | Pension Plan |  |  |  |  |
Projected benefit obligation: |  |  |  |  |
Benefit obligation, beginning of year |  | 396 |  | 341 |
Service cost |  | 22 |  | 19 | 20
Interest cost |  | 7 |  | 7 | 6
Actuarial (gain) loss |  | 17 |  | 35 |
Benefits and expenses paid |  | (11) |  | (11) |
Effect of foreign exchange rate changes |  | 5 |  | 5 |
Benefit obligation, end of year |  | 436 |  | 396 | 341
Plan assets: |  |  |  |  |
Fair value of plan assets, beginning of year |  | 289 |  | 270 |
Actual return on plan assets |  | 24 |  | (9) |
Employer contributions |  | 38 |  | 34 |
Benefits and expenses paid |  | (11) |  | (11) |
Effect of foreign exchange rate changes |  | 4 |  | 5 |
Fair value of plan assets, end of year |  | 344 |  | 289 | 270
Funded status of the plans | [1] | (92) |  | (107) |
Amounts recognized in accumulated other comprehensive income: |  |  |  |  |
Net actuarial (gain) loss |  | 92 |  | 95 |
Prior service (credit) cost |  | (2) |  | (2) |
Total included in accumulated other comprehensive income |  | 90 |  | 93 |
Accumulated benefit obligation |  | 390 |  | 356 |
U.S. | Pension Plan |  |  |  |  |
Projected benefit obligation: |  |  |  |  |
Benefit obligation, beginning of year |  | 875 |  | 908 |
Service cost |  | 23 |  | 27 | 24
Interest cost |  | 20 |  | 31 | 40
Actuarial (gain) loss |  | 163 | [2] | (69) |
Benefits and expenses paid |  | (23) |  | (22) |
Effect of foreign exchange rate changes |  | 0 |  | 0 |
Benefit obligation, end of year |  | 1,058 |  | 875 | 908
Plan assets: |  |  |  |  |
Fair value of plan assets, beginning of year |  | 465 |  | 448 |
Actual return on plan assets |  | 98 |  | (30) |
Employer contributions |  | 104 |  | 69 |
Benefits and expenses paid |  | (23) |  | (22) |
Effect of foreign exchange rate changes |  | 0 |  | 0 |
Fair value of plan assets, end of year |  | 644 |  | 465 | $ 448
Funded status of the plans | [1] | (414) |  | (410) |
Amounts recognized in accumulated other comprehensive income: |  |  |  |  |
Net actuarial (gain) loss |  | 259 |  | 174 |
Prior service (credit) cost |  | (4) |  | (4) |
Total included in accumulated other comprehensive income |  | 255 |  | 170 |
Accumulated benefit obligation |  | 886 |  | 746 |
U.S. | Pension Plan | Funded Plan |  |  |  |  |
Plan assets: |  |  |  |  |
Employer contributions |  | $ 95 |  | $ 60 |
[1] | Recognized in other liabilities in the consolidated balance sheets
[2] | Actuarial losses increased due to lower discount rates at the end of 2019. Also, additional funds were contributed to the U.S. funded defined benefit plan in 2019. The Company contributed $95 million in 2019 compared to $60 million in 2018.

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- Definition Amount, before tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (i-k) -URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669646-108580 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669686-108580 + Details
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- Definition Amount, before tax, of accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit. + 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 (j) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669686-108580 + Details
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- Definition Amount, before tax, of accumulated other comprehensive (income) loss for cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669686-108580 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 (j) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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- Definition Amount of increase (decrease) in plan assets of defined benefit plan from actual return (loss) determined by change in fair value of plan assets adjusted for contributions, benefit payments, and other expenses. + 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)(1) -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 + Details
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- Definition Amount of payment to participant of defined benefit plan which decreases benefit obligation. 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 20 -Section 50 -Paragraph 1 -Subparagraph (a)(6) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 2: 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 + Details
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