Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
Income Taxes (Details) - USD ($) $ in Millions	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Effective Income Tax Rate Reconciliation [Line Items]
Reserves for uncertain tax positions	$ 119.1		$ 119.1		$ 119.2
Uncertain tax positions, related tax benefits	0.9		0.9		$ 0.9
Non-US \| Switzerland and Nigeria
Effective Income Tax Rate Reconciliation [Line Items]
Deferred foreign tax benefits	23.0
Non-US \| Luxembourg, Switzerland, And Nigeria
Effective Income Tax Rate Reconciliation [Line Items]
Deferred foreign tax benefits			37.7
Non-US \| Luxembourg
Effective Income Tax Rate Reconciliation [Line Items]
Deferred foreign tax benefits		$ 22.3		$ 78.9
Non-US \| Luxembourg, Switzerland, And 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 \| Luxembourg, Switzerland, And United States
Effective Income Tax Rate Reconciliation [Line Items]
Tax expenses related to various recurring items	$ 39.3		$ 103.4