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COMPANY-SPONSORED EMPLOYEE BENEFIT PLANS - Net Periodic Benefit Cost for Company Sponsored Pension and Postretirement Benefit Plans (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Pension Benefits | United States |  |  |
Net Periodic Benefit Cost: |  |  |
Service cost | $ 1,897 | $ 1,853 | $ 1,439
Interest cost | 1,948 | 1,977 | 2,067
Expected return on plan assets | (3,327) | (3,549) | (3,130)
Amortization of: |  |  |
Amortization of prior service cost | 139 | 218 | 218
Actuarial (gain) loss | (3,284) | 6,211 | 2,296
Net periodic benefit cost | (2,627) | 6,710 | 2,890
Pension Benefits | International Pension Benefits |  |  |
Net Periodic Benefit Cost: |  |  |
Service cost | 76 | 67 | 57
Interest cost | 38 | 40 | 47
Expected return on plan assets | (68) | (86) | (76)
Amortization of: |  |  |
Amortization of prior service cost | 2 | 2 | 2
Actuarial (gain) loss | (12) | 27 | 54
Net periodic benefit cost | 36 | 50 | 84
Postemployment Retirement Benefits | United States |  |  |
Net Periodic Benefit Cost: |  |  |
Service cost | 28 | 29 | 23
Interest cost | 81 | 91 | 108
Expected return on plan assets | (5) | (8) | (8)
Amortization of: |  |  |
Amortization of prior service cost | 7 | 7 | 7
Actuarial (gain) loss | 24 | 246 | 37
Net periodic benefit cost | $ 135 | $ 365 | $ 167

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- Definition Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan. + References Reference 1: 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=123450688&loc=d3e4179-114921 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4587-114921 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(3) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 3A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123453770&loc=SL108413299-114919 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920 + Details
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