v3.26.3
Commitments and Contingencies - Schedule of Change in Duties Receivable of Countervailing and Anti-dumping Duties (Detail) - USD ($)
$ in Millions
 9 Months Ended 12 Months Ended
Sep. 30, 2026
Dec. 31, 2025
Commitments And Contingencies [Line Items]    
Beginning of year $ 242 [1] $ 195
Net cash deposits paid recognized as receivable 19 20
Accretion 23 27
Balance at end of period [1] 284 242
Countervailing Duties [Member]    
Commitments And Contingencies [Line Items]    
Beginning of year 176 [1] 146
Net cash deposits paid recognized as receivable 10 9
Accretion 18 21
Balance at end of period [1] 204 176
Anti-dumping Duties [Member]    
Commitments And Contingencies [Line Items]    
Beginning of year 66 [1] 49
Net cash deposits paid recognized as receivable 9 11
Accretion 5 6
Balance at end of period [1] $ 80 $ 66
[1] The balance of $284 million is shown in Other assets in the Consolidated Balance Sheets.