XML 226 R152.htm IDEA: XBRL DOCUMENT v3.24.0.1
Employee Benefits - Fair Values of Postretirement Plan Assets by Asset Category (Details) - Other Postretirement Benefit Plans - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]      
Plan assets $ 40 $ 40 $ 57
Fair Value, Inputs, Level 1, 2 and 3 | Equity — U.S.      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets 24 24  
Fair Value, Inputs, Level 1, 2 and 3 | Equity — International      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets 7 7  
Fair Value, Inputs, Level 1, 2 and 3 | Fixed income — U.S.      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets 8 8  
Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets 39 39  
Level 1 | Equity — U.S.      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets 24 24  
Level 1 | Equity — International      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets 7 7  
Level 1 | Fixed income — U.S.      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets 8 8  
Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets 0 0  
Level 2 | Equity — U.S.      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets 0 0  
Level 2 | Equity — International      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets 0 0  
Level 2 | Fixed income — U.S.      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets 0 0  
Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets 0 0  
Level 3 | Equity — U.S.      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets 0 0  
Level 3 | Equity — International      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets 0 0  
Level 3 | Fixed income — U.S.      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets 0 0  
Measured at NAV | Other assets (measured at NAV)      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets $ 1 $ 1