CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY - USD ($) shares in Millions, $ in Millions	Total	Ordinary Shares Issued	Accumulated Other Comprehensive Income (Loss)	Retained Earnings (Accumulated Deficit)
Beginning balance (in shares) at Dec. 31, 2021		133.8
Beginning balance at Dec. 31, 2021	$ 5,151.7	$ 7,043.2	$ 35.5	$ (1,927.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(140.6)			(140.6)
Other comprehensive income (loss)	(62.5)		(62.5)
Issuance of ordinary shares under:
Restricted stock plan (in shares)		1.4
Compensation for restricted stock	54.9	$ 54.9
Cash dividends	(142.4)	$ (142.4)
Shares withheld for payment of employees' withholding tax liability (in shares)		(0.5)
Shares withheld for payment of employees' withholding tax liability	(19.0)	$ (19.0)
Ending balance (in shares) at Dec. 31, 2022		134.7
Ending balance at Dec. 31, 2022	4,842.1	$ 6,936.7	(27.0)	(2,067.6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(12.7)			(12.7)
Other comprehensive income (loss)	37.7		37.7
Issuance of ordinary shares under:
Restricted stock plan (in shares)		1.3
Compensation for restricted stock	68.8	$ 68.8
Cash dividends	(149.7)	$ (149.7)
Shares withheld for payment of employees' withholding tax liability (in shares)		(0.5)
Shares withheld for payment of employees' withholding tax liability	(18.3)	$ (18.3)
Ending balance (in shares) at Dec. 31, 2023		135.5
Ending balance at Dec. 31, 2023	4,767.9	$ 6,837.5	10.7	(2,080.3)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(171.8)			(171.8)
Other comprehensive income (loss)	(173.1)		(173.1)
Issuance of ordinary shares under:
Restricted stock plan (in shares)		1.5
Compensation for restricted stock	64.4	$ 64.4
Cash dividends	(152.5)	$ (152.5)
Shares withheld for payment of employees' withholding tax liability (in shares)		(0.5)
Shares withheld for payment of employees' withholding tax liability	(15.5)	$ (15.5)
Ending balance (in shares) at Dec. 31, 2024		136.5
Ending balance at Dec. 31, 2024	$ 4,319.4	$ 6,733.9	$ (162.4)	$ (2,252.1)