Annual report pursuant to Section 13 and 15(d)

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

v3.22.0.1
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