Annual report pursuant to Section 13 and 15(d)

COMPANY-SPONSORED EMPLOYEE BENEFIT PLANS - Fair Value Measurement of Plan Assets Using Unobservable Inputs (Details)

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COMPANY-SPONSORED EMPLOYEE BENEFIT PLANS - Fair Value Measurement of Plan Assets Using Unobservable Inputs (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets at beginning of year $ 43,916  
Actual Return on Assets:    
Fair value of plan assets at end of year 45,482 $ 43,916
Level 3    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets at beginning of year 77 88
Actual Return on Assets:    
Assets Held at End of Year 4 (2)
Assets Sold During the Year 2 (35)
Purchases 452 491
Sales (455) (464)
Transfers Into (Out of) Level 3 0 (1)
Fair value of plan assets at end of year 80 77
Level 3 | Corporate Bonds    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets at beginning of year 0 14
Actual Return on Assets:    
Assets Held at End of Year 0 0
Assets Sold During the Year 2 (35)
Purchases 450 482
Sales (452) (460)
Transfers Into (Out of) Level 3 0 (1)
Fair value of plan assets at end of year 0 0
Level 3 | Other    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets at beginning of year 77 74
Actual Return on Assets:    
Assets Held at End of Year 4 (2)
Assets Sold During the Year 0 0
Purchases 2 9
Sales (3) (4)
Transfers Into (Out of) Level 3 0 0
Fair value of plan assets at end of year $ 80 $ 77