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Earnings Per Share (Narrative) (Detail) - shares
shares in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Antidilutive Shares [Abstract]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 1 1 1 1