v3.26.1
Employee Benefit Obligations - Components of net periodic benefit cost (Details) - Defined Benefit Pension Plans - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Ball-sponsored plans:        
Service cost $ 3 $ 3 $ 6 $ 7
Interest cost $ 35 $ 38 $ 70 $ 74
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 $ (40) $ (42) $ (81) $ (83)
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
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
Recognized net actuarial loss $ 5 $ 5 $ 10 $ 10
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 $ 3 $ 4 $ 6 $ 9
U.S.        
Ball-sponsored plans:        
Service cost 3 3 6 7
Interest cost 13 15 25 29
Expected return on plan assets (19) (20) (38) (40)
Recognized net actuarial loss   1 1 2
Total net periodic benefit cost (3) (1) (6) (2)
Non-U.S.        
Ball-sponsored plans:        
Interest cost 22 23 45 45
Expected return on plan assets (21) (22) (43) (43)
Amortization of prior service cost     1 1
Recognized net actuarial loss 5 4 9 8
Total net periodic benefit cost $ 6 $ 5 $ 12 $ 11