Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
Income Taxes (Details) - USD ($) $ in Millions	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025	Dec. 31, 2025
Effective Income Tax Rate Reconciliation [Line Items]
Reserves for uncertain tax positions	$ 118.7		$ 118.7		$ 119.2
Uncertain tax positions, related tax benefits	1.0		1.0		$ 0.9
Non-US \| Switzerland
Effective Income Tax Rate Reconciliation [Line Items]
Deferred foreign tax benefits	(15.8)
Non-US \| Nigeria
Effective Income Tax Rate Reconciliation [Line Items]
Deferred foreign tax benefits			23.9
Non-US \| Luxembourg
Effective Income Tax Rate Reconciliation [Line Items]
Deferred foreign tax benefits		$ 6.1		$ 85.1
Non-US \| Ghana, Guyana, Luxembourg, Switzerland, and the United States. \| Disposal Group, Disposed of by Sale, Not Discontinued Operations
Effective Income Tax Rate Reconciliation [Line Items]
Tax effects related to gain on sale of operating assets			23.5
Non-US And US \| Ghana, Guyana, Luxembourg, Switzerland, and the United States.
Effective Income Tax Rate Reconciliation [Line Items]
Tax expenses related to various recurring items	$ 117.3		$ 222.7