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, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Ball-sponsored plans:
Service cost	$ 3	$ 4	$ 7	$ 9
Interest cost	$ 38	$ 36	$ 74	$ 71
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)	$ (41)	$ (83)	$ (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	$ 4	$ 10	$ 9
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	$ 4	$ 3	$ 9	$ 7
U.S.
Ball-sponsored plans:
Service cost	3	4	7	8
Interest cost	15	15	29	30
Expected return on plan assets	(20)	(22)	(40)	(44)
Recognized net actuarial loss	1	1	2	2
Total net periodic benefit cost	(1)	(2)	(2)	(4)
Non-U.S.
Ball-sponsored plans:
Service cost				1
Interest cost	23	21	45	41
Expected return on plan assets	(22)	(19)	(43)	(39)
Amortization of prior service cost			1	1
Recognized net actuarial loss	4	3	8	7
Total net periodic benefit cost	$ 5	$ 5	$ 11	$ 11