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Leases (Narrative) (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Lessee, Lease, Description [Line Items]      
Lease expense $ 49 $ 55 $ 59
Operating lease, cost 29 34 36
Variable lease, cost 20 21 23
Operating lease, payments 55 38 42
Right-of-use asset obtained in exchange for operating lease liability 54 $ 28 $ 20
Operating lease not yet commenced $ 5    
Maximum      
Lessee, Lease, Description [Line Items]      
Lessee, operating lease, lease not yet commenced, term of contract 11 years    
Minimum      
Lessee, Lease, Description [Line Items]      
Lessee, operating lease, lease not yet commenced, term of contract 5 years