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EMPLOYEE BENEFITS (Details - Changes in Level 3 fair value measurements) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Changes in Level 3 fair value measurements    
Issuances $ 0 $ 0
Pensions | U.S.    
Changes in Level 3 fair value measurements    
Fair value of plan assets, beginning of year 4,465,000,000 3,840,000,000
Fair value of plan assets, end of year 4,931,000,000 4,465,000,000
Pensions | U.S. | Level 3    
Changes in Level 3 fair value measurements    
Fair value of plan assets, beginning of year 20,000,000 27,000,000
Net Realized and Unrealized Gains (Losses) (2,000,000) 0
Purchases 0 2,000,000
Sales (2,000,000) (5,000,000)
Settlements 0 0
Issuances 0 0
Transfers In 0 0
Transfers Out 0 (4,000,000)
Fair value of plan assets, end of year 16,000,000 20,000,000
Changes in Unrealized Gains (Losses) on Instruments Held at End of Year (3,000,000) 5,000,000
Pensions | U.S. | Level 3 | Other comprehensive income    
Changes in Level 3 fair value measurements    
Changes in Unrealized Gains (Losses) on Instruments Held at End of Year 0  
Pensions | U.S. | Level 3 | Fixed maturity securities: U.S. investment grade    
Changes in Level 3 fair value measurements    
Fair value of plan assets, beginning of year 9,000,000 13,000,000
Net Realized and Unrealized Gains (Losses) 1,000,000 3,000,000
Purchases 0 0
Sales 0 (3,000,000)
Settlements 0 0
Issuances 0 0
Transfers In 0 0
Transfers Out 0 (4,000,000)
Fair value of plan assets, end of year 10,000,000 9,000,000
Changes in Unrealized Gains (Losses) on Instruments Held at End of Year 0 3,000,000
Pensions | U.S. | Level 3 | Fixed maturity securities: U.S. investment grade | Other comprehensive income    
Changes in Level 3 fair value measurements    
Changes in Unrealized Gains (Losses) on Instruments Held at End of Year 0  
Pensions | U.S. | Level 3 | Direct private equity    
Changes in Level 3 fair value measurements    
Fair value of plan assets, beginning of year 11,000,000 14,000,000
Net Realized and Unrealized Gains (Losses) (3,000,000) (3,000,000)
Purchases 0 2,000,000
Sales (2,000,000) (2,000,000)
Settlements 0 0
Issuances 0 0
Transfers In 0 0
Transfers Out 0 0
Fair value of plan assets, end of year 6,000,000 11,000,000
Changes in Unrealized Gains (Losses) on Instruments Held at End of Year (3,000,000) 2,000,000
Pensions | U.S. | Level 3 | Direct private equity | Other comprehensive income    
Changes in Level 3 fair value measurements    
Changes in Unrealized Gains (Losses) on Instruments Held at End of Year 0  
Pensions | U.S. | Level 3 | Mortgage-backed, asset-backed and collateralized    
Changes in Level 3 fair value measurements    
Fair value of plan assets, beginning of year 0  
Fair value of plan assets, end of year 0 0
Pensions | U.S. | Level 3 | Insurance contracts    
Changes in Level 3 fair value measurements    
Fair value of plan assets, beginning of year 0  
Fair value of plan assets, end of year 0 0
Pensions | Non U.S. Plans    
Changes in Level 3 fair value measurements    
Fair value of plan assets, beginning of year 899,000,000 861,000,000
Fair value of plan assets, end of year 977,000,000 899,000,000
Pensions | Non U.S. Plans | Level 3    
Changes in Level 3 fair value measurements    
Fair value of plan assets, beginning of year 160,000,000 145,000,000
Net Realized and Unrealized Gains (Losses) 18,000,000 16,000,000
Purchases 1,000,000 (1,000,000)
Sales 0 0
Settlements 0 0
Issuances 0 0
Transfers In 0 0
Transfers Out 0 0
Fair value of plan assets, end of year 179,000,000 160,000,000
Changes in Unrealized Gains (Losses) on Instruments Held at End of Year 0 0
Pensions | Non U.S. Plans | Level 3 | Other comprehensive income    
Changes in Level 3 fair value measurements    
Changes in Unrealized Gains (Losses) on Instruments Held at End of Year 0  
Pensions | Non U.S. Plans | Level 3 | Fixed maturity securities: U.S. investment grade    
Changes in Level 3 fair value measurements    
Fair value of plan assets, beginning of year 0  
Fair value of plan assets, end of year 0 0
Pensions | Non U.S. Plans | Level 3 | Direct private equity    
Changes in Level 3 fair value measurements    
Fair value of plan assets, beginning of year 0  
Fair value of plan assets, end of year 0 0
Pensions | Non U.S. Plans | Level 3 | Mortgage-backed, asset-backed and collateralized    
Changes in Level 3 fair value measurements    
Fair value of plan assets, beginning of year 0  
Fair value of plan assets, end of year 0 0
Pensions | Non U.S. Plans | Level 3 | Insurance contracts    
Changes in Level 3 fair value measurements    
Fair value of plan assets, beginning of year 160,000,000 145,000,000
Net Realized and Unrealized Gains (Losses) 18,000,000 16,000,000
Purchases 1,000,000 (1,000,000)
Sales 0 0
Settlements 0 0
Issuances 0 0
Transfers In 0 0
Transfers Out 0 0
Fair value of plan assets, end of year 179,000,000 160,000,000
Changes in Unrealized Gains (Losses) on Instruments Held at End of Year 0 $ 0
Pensions | Non U.S. Plans | Level 3 | Insurance contracts | Other comprehensive income    
Changes in Level 3 fair value measurements    
Changes in Unrealized Gains (Losses) on Instruments Held at End of Year $ 0