Condensed Consolidated Balance Sheets (Parenthetical) shares in Thousands, $ in Millions	Sep. 30, 2022 USD ($) $ / shares shares	Sep. 30, 2022 € / shares	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2021 € / shares
Allowance for doubtful accounts | $	$ 6.0		$ 4.1
Accumulated depreciation | $	$ 579.3		$ 556.5
Ordinary shares, nominal value | $ / shares	$ 0.01		$ 0.01
Ordinary shares, shares authorized	4,000,000		4,000,000
Ordinary shares, shares issued	39,200		38,900
Ordinary shares, shares outstanding	35,100		37,900
Treasury stock, shares	4,100		1,000
Preferred stock, par value | € / shares		€ 0.01		€ 0.01
Preferred stock, shares authorized	1,000,000		1,000,000
Preferred stock, shares issued	0		0
Preferred stock, shares outstanding	0		0
Deferred Ordinary Shares
Ordinary shares, nominal value | € / shares		€ 1.00		€ 1.00
Ordinary shares, shares authorized	25		25
Ordinary shares, shares issued	25		25
Ordinary shares, shares outstanding	25		25