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Employee Benefit Obligations - Components of net periodic benefit cost (Details) - Defined Benefit Pension Plans - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Ball-sponsored plans:        
Service cost $ 4 $ 5 $ 11 $ 14
Interest cost $ 37 $ 36 $ 111 $ 107
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Interest Cost, Statement of Income or Comprehensive Income [Extensible Enumeration] Selling, General and Administrative Expense Selling, General and Administrative Expense Selling, General and Administrative Expense Selling, General and Administrative Expense
Expected return on plan assets $ (42) $ (43) $ (125) $ (126)
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Expected Return (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Selling, General and Administrative Expense Selling, General and Administrative Expense Selling, General and Administrative Expense Selling, General and Administrative Expense
Amortization of prior service cost $ 1 $ 1 $ 2 $ 2
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Amortization of Prior Service Cost (Credit), Statement of Income or Comprehensive Income [Extensible Enumeration] Selling, General and Administrative Expense Selling, General and Administrative Expense Selling, General and Administrative Expense Selling, General and Administrative Expense
Recognized net actuarial loss $ 5 $ 5 $ 15 $ 14
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Immediate Recognition of Actuarial Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Selling, General and Administrative Expense Selling, General and Administrative Expense Selling, General and Administrative Expense Selling, General and Administrative Expense
Total net periodic benefit cost $ 5 $ 4 $ 14 $ 11
U.S.        
Ball-sponsored plans:        
Service cost 4 4 11 12
Interest cost 14 15 43 45
Expected return on plan assets (20) (22) (59) (66)
Recognized net actuarial loss 1 1 2 3
Total net periodic benefit cost (1) (2) (3) (6)
Non-U.S.        
Ball-sponsored plans:        
Service cost   1   2
Interest cost 23 21 68 62
Expected return on plan assets (22) (21) (66) (60)
Amortization of prior service cost 1 1 2 2
Recognized net actuarial loss 4 4 13 11
Total net periodic benefit cost $ 6 $ 6 $ 17 $ 17