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Employee Benefit Plans - Allocation of Plan Assets (Details) - Fair Value, Recurring - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Level 1    
Defined Benefit Plan Disclosure [Line Items]    
Total investments at fair value $ 482 $ 803
Level 2    
Defined Benefit Plan Disclosure [Line Items]    
Total investments at fair value 100 205
Level 3    
Defined Benefit Plan Disclosure [Line Items]    
Total investments at fair value 0 0
Cash and cash equivalents (1) | Level 1    
Defined Benefit Plan Disclosure [Line Items]    
Total investments at fair value 43 230
Cash and cash equivalents (1) | Level 2    
Defined Benefit Plan Disclosure [Line Items]    
Total investments at fair value 0 0
Cash and cash equivalents (1) | Level 3    
Defined Benefit Plan Disclosure [Line Items]    
Total investments at fair value 0 0
Equity securities | Level 1    
Defined Benefit Plan Disclosure [Line Items]    
Total investments at fair value 1 10
Equity securities | Level 2    
Defined Benefit Plan Disclosure [Line Items]    
Total investments at fair value 40 93
Equity securities | Level 3    
Defined Benefit Plan Disclosure [Line Items]    
Total investments at fair value 0 0
Fixed income securities | Level 1    
Defined Benefit Plan Disclosure [Line Items]    
Total investments at fair value 137 202
Fixed income securities | Level 2    
Defined Benefit Plan Disclosure [Line Items]    
Total investments at fair value 86 105
Fixed income securities | Level 3    
Defined Benefit Plan Disclosure [Line Items]    
Total investments at fair value 0 0
Other investments | Level 1    
Defined Benefit Plan Disclosure [Line Items]    
Total investments at fair value 301 361
Other investments | Level 2    
Defined Benefit Plan Disclosure [Line Items]    
Total investments at fair value (26) 7
Other investments | Level 3    
Defined Benefit Plan Disclosure [Line Items]    
Total investments at fair value $ 0 $ 0