Financial Instruments and Risk Management - General (Details) $ / shares in Units, € in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025 USD ($) approach	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) approach $ / shares	Sep. 30, 2024 USD ($)	Jun. 30, 2025 USD ($)	May 31, 2025 EUR (€)	Dec. 31, 2024 USD ($)	Jun. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)
Financial Instruments and Risk Management
Other comprehensive earnings (loss), net of tax	$ (43.0)	$ (9.0)	$ (91.0)	$ (4.0)
Total shareholders' equity	5,452.0	6,755.0	5,452.0	6,755.0	$ 5,277.0		$ 5,930.0	$ 6,983.0	$ 3,837.0
Accumulated Other Comprehensive Earnings (Loss)
Financial Instruments and Risk Management
Other comprehensive earnings (loss), net of tax	(43.0)	(9.0)	(91.0)	(4.0)
Total shareholders' equity	(912.0)	$ (912.0)	(912.0)	$ (912.0)	$ (955.0)		(1,003.0)	$ (921.0)	$ (916.0)
Accumulated Other Comprehensive Earnings (Loss) For Non Derivative Financial Instrument
Financial Instruments and Risk Management
Total shareholders' equity	(478.0)		(478.0)				$ (618.0)
Net Investment \| Accumulated Other Comprehensive Earnings (Loss) For Non Derivative Financial Instrument
Financial Instruments and Risk Management
Other comprehensive earnings (loss), net of tax	3.0		32.0
Total shareholders' equity	$ 32.0		$ 32.0
Net Investment \| 4.25% senior notes
Financial Instruments and Risk Management
Face amount of debt \| €						€ 850
Interest rate (as a percent)						4.25%
Commodity contracts
Financial Instruments and Risk Management
Number of methods through which entity manages commodity price risk in connection with market price fluctuations of aluminum ingot \| approach	2		2
Notional amount of contracts	$ 1,685.0		$ 1,685.0
Longest duration of forecasted hedge transactions in years	2 years		2 years
Currency
Financial Instruments and Risk Management
Notional amount of contracts	$ 2,894.0		$ 2,894.0
Net gain (loss) included in AOCI, after-tax	$ 2.0		2.0
Net gain (loss) included in AOCI, after-tax, expected to be recognized in net earnings within the next 12 months			$ 2.0
Longest duration of forecasted hedge transactions in years	1 year		1 year
Interest Rate
Financial Instruments and Risk Management
Notional amount of contracts	$ 600.0		$ 600.0
Net gain (loss) included in AOCI, after-tax	$ 1.0		1.0
Net gain (loss) included in AOCI, after-tax, expected to be recognized in net earnings within the next 12 months			$ 1.0
Longest duration of forecasted hedge transactions in years	2 years		2 years
Net Investment
Financial Instruments and Risk Management
Notional amount of contracts	$ 1,050.0		$ 1,050.0
Net gain (loss) included in AOCI, after-tax	$ (83.0)		$ (83.0)
Longest duration of forecasted hedge transactions in years	4 years		4 years
Equity contracts
Financial Instruments and Risk Management
Combined notional value, shares	1.1		1.1
Change in company's stock price (in dollars per share) \| $ / shares			$ 1

BALL Corp 10-Q