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BENEFIT PLANS - Weighted-Average Actuarial Assumptions (Detail)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Other Postretirement Benefit Plans, Defined Benefit      
Weighted-average actuarial assumptions:      
Discount rate - net periodic benefit cost 4.25% 3.75% 4.25%
Discount rate - benefit obligations 3.25% 4.25% 3.75%
Health care cost trend rates [1] 7.50% 7.40% 5.40%
Defined benefit plan, ultimate health care cost trend rate 3.80% 4.10% 4.50%
Defined benefit plan number of years that rate reaches ultimate trend rate 54 years 61 years 77 years
Japan | Pension Plan      
Weighted-average actuarial assumptions:      
Discount rate - net periodic benefit cost 1.25% 1.25% 1.25%
Discount rate - benefit obligations 0.75% 1.25% 1.25%
Expected long-term return on plan assets 2.00% 2.00% 2.00%
U.S. | Pension Plan      
Weighted-average actuarial assumptions:      
Discount rate - net periodic benefit cost 4.25% 3.75% 4.25%
Discount rate - benefit obligations 3.25% 4.25% 3.75%
Expected long-term return on plan assets 6.25% 6.50% 6.75%
Rate of compensation increase 4.00% 4.00% 4.00%
[1] For the years 2019, 2018 and 2017, the health care cost trend rates are expected to trend down to 3.8% in 54 years, 4.1% in 61 years, and 4.5% in 77 years, respectively.