v3.25.4
Retirement Plans and Profit Sharing Arrangements - Pension Plan Assets Measured at Fair Value on a Recurring Basis (Details) - Pension Plans - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Pension plan assets measured at fair value on a recurring basis:      
Fair value of plan assets $ 1,392 $ 1,253 $ 1,292
Level 1      
Pension plan assets measured at fair value on a recurring basis:      
Fair value of plan assets 64 115  
Level 2      
Pension plan assets measured at fair value on a recurring basis:      
Fair value of plan assets 5 6  
Level 3      
Pension plan assets measured at fair value on a recurring basis:      
Fair value of plan assets 21 21  
U.S. small cap stocks | Total, Level 1, 2 and 3      
Pension plan assets measured at fair value on a recurring basis:      
Fair value of plan assets 41 52  
U.S. small cap stocks | Level 1      
Pension plan assets measured at fair value on a recurring basis:      
Fair value of plan assets 36 46  
U.S. small cap stocks | Level 2      
Pension plan assets measured at fair value on a recurring basis:      
Fair value of plan assets 5 6  
U.S. small cap stocks | Level 3      
Pension plan assets measured at fair value on a recurring basis:      
Fair value of plan assets 0 0  
Registered investment companies | Total, Level 1, 2 and 3      
Pension plan assets measured at fair value on a recurring basis:      
Fair value of plan assets 28 69  
Registered investment companies | Level 1      
Pension plan assets measured at fair value on a recurring basis:      
Fair value of plan assets 28 69  
Registered investment companies | Level 2      
Pension plan assets measured at fair value on a recurring basis:      
Fair value of plan assets 0 0  
Registered investment companies | Level 3      
Pension plan assets measured at fair value on a recurring basis:      
Fair value of plan assets 0 0  
Insurance contracts | Total, Level 1, 2 and 3      
Pension plan assets measured at fair value on a recurring basis:      
Fair value of plan assets 21 21  
Insurance contracts | Level 1      
Pension plan assets measured at fair value on a recurring basis:      
Fair value of plan assets 0 0  
Insurance contracts | Level 2      
Pension plan assets measured at fair value on a recurring basis:      
Fair value of plan assets 0 0  
Insurance contracts | Level 3      
Pension plan assets measured at fair value on a recurring basis:      
Fair value of plan assets 21 21  
Cash equivalents at NAV | NAV      
Pension plan assets measured at fair value on a recurring basis:      
Fair value of plan assets 4 7  
Collective investment funds at NAV | NAV      
Pension plan assets measured at fair value on a recurring basis:      
Fair value of plan assets 1,230 1,057  
Real estate investment trusts at NAV | NAV      
Pension plan assets measured at fair value on a recurring basis:      
Fair value of plan assets 22 20  
Hedge funds at NAV | NAV      
Pension plan assets measured at fair value on a recurring basis:      
Fair value of plan assets $ 46 $ 27