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COMPANY-SPONSORED EMPLOYEE BENEFIT PLANS - Fair Value Measurement of Plan Assets Using Unobservable Inputs (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets at beginning of year | $ 54,881 |
Actual Return on Assets: |  |
Fair value of plan assets at end of year | 58,175 | $ 54,881
Fair Value, Inputs, Level 3 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets at beginning of year | 65 | 12
Actual Return on Assets: |  |
Assets Held at End of Year | 5 | 3
Assets Sold During the Year | (16) | (5)
Purchases | 43 | 61
Sales | (9) | (6)
Transfers Into (Out of) Level 3 | 0 | 0
Fair value of plan assets at end of year | 88 | 65
Fair Value, Inputs, Level 3 | Corporate Bonds |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets at beginning of year | 3 | 0
Actual Return on Assets: |  |
Assets Held at End of Year | 0 | 0
Assets Sold During the Year | (16) | (5)
Purchases | 33 | 10
Sales | (6) | (2)
Transfers Into (Out of) Level 3 | 0 | 0
Fair value of plan assets at end of year | 14 | 3
Fair Value, Inputs, Level 3 | Other |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets at beginning of year | 62 | 12
Actual Return on Assets: |  |
Assets Held at End of Year | 5 | 3
Assets Sold During the Year | 0 | 0
Purchases | 10 | 51
Sales | (3) | (4)
Transfers Into (Out of) Level 3 | 0 | 0
Fair value of plan assets at end of year | $ 74 | $ 62

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- Definition Amount, measured using unobservable inputs, of increase (decrease) in plan assets of defined benefit plan from actual return (loss) on assets sold. + 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 (d)(iv)(02)(A) -URI http://asc.fasb.org/extlink&oid=123447040&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=123450688&loc=d3e4179-114921 + Details
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