Income Taxes - Pre-tax Income and the Provision for Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Pre-tax income (loss):
Ireland	$ 72.3	$ (212.8)	$ 341.9
United States	(23.8)	(38.2)	(35.3)
Other foreign	(56.9)	111.9	(47.9)
Total pre-tax income (loss)	(8.4)	(139.1)	258.7
Current provision (benefit) for income taxes:
Ireland	2.0	2.8	303.6
United States	18.2	(7.8)	14.9
Other foreign	56.6	30.8	81.3
Subtotal	76.8	25.8	399.8
Deferred provision (benefit) for income taxes:
Ireland	0.2	0.7	0.4
United States	(12.9)	(8.6)	3.3
Other foreign	(68.0)	(26.1)	(13.9)
Subtotal	(80.7)	(34.0)	(10.2)
Total provision for income taxes	$ (3.9)	$ (8.2)	$ 389.6