CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Millions	Total	Ordinary Shares	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	Preferred Stock	Treasury Stock
Increase (Decrease) in Shareholders' Equity
Capital stock, outstanding (in shares)		606,300,000
Balance at beginning of the period at Dec. 31, 2020	$ 9,034.8	$ 9,989.2	$ 492.4	$ (1,250.8)
Treasury Stock, Shares, Beginning Balance at Dec. 31, 2020						6,300,000
Treasury Stock, Value, Beginning Balance at Dec. 31, 2020						$ (196.0)
Increase (Decrease) in Shareholders' Equity
Exercise of Private Placement Warrants (in shares)		200,000
Exercise of Private Placement Warrants	3.6	$ 3.6
Exercise of stock options (in shares)		800,000
Stock Issued During Period, Value, Stock Options Exercised	5.1	$ 5.1
Shares Issued, Shares, Share-based Payment Arrangement, Forfeited		(400,000)
Shares Issued, Value, Share-based Payment Arrangement, Forfeited	(4.5)	$ (4.5)
Issuance of ordinary shares, net (in shares)		4,400,000
Stock Issued During Period, Value, New Issues	105.5	$ 105.5
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	10.5	10.5
Net income (loss)	(56.0)			(56.0)
Other Comprehensive Income (Loss), Net of Tax	19.6		19.6	0.0
Balance at end of the period at Mar. 31, 2021	$ 9,118.6	$ 10,109.4	512.0	(1,306.8)
Treasury Stock, Shares, Ending Balance at Mar. 31, 2021						6,300,000
Treasury Stock, Value, Ending Balance at Mar. 31, 2021						$ (196.0)
Increase (Decrease) in Shareholders' Equity
Exercised/Vested (in share)		0
Capital stock, outstanding (in shares)		611,300,000
Preferred Stock, Shares Outstanding	14,375,000				14,400,000
Capital stock, outstanding (in shares)	683,139,210
Balance at beginning of the period (in shares) at Dec. 31, 2021		683,100,000
Balance at beginning of the period at Dec. 31, 2021	$ 11,925.9	$ 11,827.9	326.7	(1,604.4)	$ 1,392.6
Treasury Stock, Shares, Beginning Balance at Dec. 31, 2021	547,136					500,000
Treasury Stock, Value, Beginning Balance at Dec. 31, 2021						$ 16.9
Increase (Decrease) in Shareholders' Equity
Exercise of stock options (in shares)		200,000
Stock Issued During Period, Value, Stock Options Exercised	$ 0.4	$ 0.4
Shares Issued, Shares, Share-based Payment Arrangement, Forfeited		(400,000)
Shares Issued, Value, Share-based Payment Arrangement, Forfeited	(5.4)	$ (5.4)
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	$ 26.9	$ 26.9
Treasury Stock, Shares, Acquired	4,100,000	4,100,000				4,100,000
Treasury Stock, Common, Value	$ (66.4)					$ (66.4)
Treasury Stock, Shares, Retired	(2,100,000)	0				(2,100,000)
Treasury Stock, Retired, Cost Method, Amount	$ (33.3)	$ (34.8)		1.5		$ 33.3
Stock Issued During Period, Shares, Treasury Stock Reissued	41,700	0				0
Issuance of treasury shares, net	$ 0.6			(0.7)		$ 1.3
Common Stock Dividends, Shares		0
Preferred Stock Dividends, Income Statement Impact	(18.7)	$ 0.0		(18.7)
Net income (loss)	69.5			69.5
Other Comprehensive Income (Loss), Net of Tax	(223.2)		(223.2)
Balance at end of the period at Mar. 31, 2022	$ 11,709.6	$ 11,815.0	$ 103.5	$ (1,552.8)	$ 1,392.6
Treasury Stock, Shares, Ending Balance at Mar. 31, 2022	2,488,897					2,500,000
Treasury Stock, Value, Ending Balance at Mar. 31, 2022						$ 48.7
Increase (Decrease) in Shareholders' Equity
Stockholders' Equity, Other Shares	(500,000)
Exercised/Vested (in share)		700,000
Preferred Stock, Shares Outstanding	14,375,000				14,400,000
Capital stock, outstanding (in shares)	678,974,630	679,000,000.0