v3.26.1
Commitments and Contingencies - Additional Information (Details)
$ in Millions
1 Months Ended 6 Months Ended
Apr. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
employeeGroup
Mar. 31, 2026
USD ($)
Dec. 31, 2025
USD ($)
Long-term Purchase Commitment [Line Items]          
Number of union-represented employee groups | employeeGroup     7    
Amount of employees represented by unions     88.00%    
Accrued liabilities for health care claims     $ 7   $ 7
U.S. Transportation Security Administration          
Long-term Purchase Commitment [Line Items]          
Litigation settlement, fee expense $ 42        
Additional estimated liability       $ 77  
Internal Revenue Service (IRS)          
Long-term Purchase Commitment [Line Items]          
Preliminary assessment of estimated tax liability   $ 133      
Balance Sheet Location [Axis]: us-gaap:LiabilitiesNoncurrent          
Long-term Purchase Commitment [Line Items]          
Preproduction costs related to long-term supply arrangements, costs capitalized     (49)   (52)
Balance Sheet Location [Axis]: us-gaap:OtherAssets          
Long-term Purchase Commitment [Line Items]          
Preproduction costs related to long-term supply arrangements, costs capitalized     $ (61)   $ (81)