Intangibles Assets, Net (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Jun. 30, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Total annual intangible asset amortization expense
Intangible assets (net of accumulated amortization)		$ 1,417.0	$ 1,688.0
Amortization expense		165.0	180.0	$ 180.0
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2023		160.0
2024		156.0
2025		152.0
2026		146.0
2027		141.0
Thereafter		662.0
Rexam
Total annual intangible asset amortization expense
Amortization expense		135.0	152.0	$ 150.0
Customer relationships and other intangibles
Total annual intangible asset amortization expense
Intangible assets (net of accumulated amortization)		1,320.0	1,593.0
Accumulated amortization and impairment losses		$ 914.0	862.0
Customer relationships and other intangibles | Aluminum beverage packaging business in Russia
Total annual intangible asset amortization expense
Impairment charge	$ 131.0
Impairment, Intangible Asset, Finite-Lived, Statement of Income or Comprehensive Income [Extensible Enumeration]		Restructuring and Other Activities
Capitalized software
Total annual intangible asset amortization expense
Intangible assets (net of accumulated amortization)		$ 80.0	74.0
Accumulated amortization and impairment losses		204.0	187.0
Other intangibles
Total annual intangible asset amortization expense
Intangible assets (net of accumulated amortization)		17.0	21.0
Accumulated amortization and impairment losses		$ 99.0	$ 97.0