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Contingencies and Commitments - Changes in Accrued Liabilities for Remediation Activities (Detail)
$ in Millions
3 Months Ended
Mar. 31, 2022
USD ($)
Change in Accrued Liabilities for Remediation Activities [Roll Forward]  
Beginning of period $ 158
Accruals for environmental remediation deemed probable and reasonably estimable 1
Obligations settled (8)
End of period $ 151