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Reclassifications from Accumulated Other Comprehensive Income (AOCI) - Defined Benefit Plan In Other Comprehensive Income (Detail) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Amortization of pension and other benefit items    
Derivative reclassifications to Condensed Consolidated Statements of Operations $ (22) $ 20
Total before tax 1,128 92
Tax provision (246) (1)
Net of tax 882 91
Amount reclassified from AOCI    
Amortization of pension and other benefit items    
Total before tax 9 39
Tax provision (3) (1)
Net of tax 6 38
Pension and Other Benefit Items | Amount reclassified from AOCI    
Amortization of pension and other benefit items    
Prior service credits (7) (7)
Actuarial losses 6 31
Settlement, termination and curtailment losses 0 0
Total pensions and other benefits items (1) 24
Unrealized (Loss) Gain on Derivatives | Amount reclassified from AOCI    
Amortization of pension and other benefit items    
Derivative reclassifications to Condensed Consolidated Statements of Operations $ 10 $ 15