CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Millions	Total	Total Shareholders’ Equity	Common Stock and Additional Paid-In Capital	Retained Earnings	Cumulative Translation Adjustment	Retirement Benefits Adjustment	Cumulative Unrealized Gain (Loss) on Derivatives	Treasury Stock	Noncontrolling Interest
Balance at Dec. 31, 2020	$ 2,540.3	$ 2,540.2	$ 776.1	$ 2,841.5	$ 13.4	$ (24.4)	$ (2.5)	$ (1,063.9)	$ 0.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	112.7	112.7		112.7
Cumulative translation adjustment	(48.5)	(48.5)			(48.5)
Net change in retirement obligations (net of tax)	0.8	0.8				0.8
Net change on derivatives designated as cash flow hedges (net of tax)	0.7	0.7					0.7
Issuance of shares of common stock from issuance of unvested shares, performance share units and exercise of stock options (net of tax)	3.2	3.2						3.2
Shares surrendered for tax withholding	(5.4)	(5.4)						(5.4)
Share-based compensation	6.2	6.2	6.2
Balance at Mar. 31, 2021	2,610.0	2,609.9	782.3	2,954.2	(35.1)	(23.6)	(1.8)	(1,066.1)	0.1
Balance at Dec. 31, 2020	2,540.3	2,540.2	776.1	2,841.5	13.4	(24.4)	(2.5)	(1,063.9)	0.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	330.6
Net change in retirement obligations (net of tax)	10.8
Balance at Sep. 30, 2021	2,726.3	2,726.2	791.5	3,048.8	(43.5)	(13.6)	0.0	(1,057.0)	0.1
Balance at Mar. 31, 2021	2,610.0	2,609.9	782.3	2,954.2	(35.1)	(23.6)	(1.8)	(1,066.1)	0.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	102.2	102.2		102.2
Cumulative translation adjustment	20.3	20.3			20.3
Net change in retirement obligations (net of tax)	9.2	9.2				9.2
Net change on derivatives designated as cash flow hedges (net of tax)	1.8	1.8					1.8
Issuance of shares of common stock from issuance of unvested shares, performance share units and exercise of stock options (net of tax)	7.5	7.5						7.5
Shares surrendered for tax withholding	(0.1)	(0.1)						(0.1)
Share-based compensation	4.3	4.3	4.3
Cash dividends declared	(82.3)	(82.3)		(82.3)
Balance at Jun. 30, 2021	2,672.9	2,672.8	786.6	2,974.1	(14.8)	(14.4)	0.0	(1,058.7)	0.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	115.7	115.7		115.7
Cumulative translation adjustment	(28.7)	(28.7)			(28.7)
Net change in retirement obligations (net of tax)	0.8	0.8				0.8
Issuance of shares of common stock from issuance of unvested shares, performance share units and exercise of stock options (net of tax)	1.8	1.8						1.8
Shares surrendered for tax withholding	(0.1)	(0.1)						(0.1)
Share-based compensation	4.9	4.9	4.9
Cash dividends declared	(41.0)	(41.0)		(41.0)
Balance at Sep. 30, 2021	2,726.3	2,726.2	791.5	3,048.8	(43.5)	(13.6)	$ 0.0	(1,057.0)	0.1
Balance at Dec. 31, 2021	2,803.1	2,803.1	796.5	3,126.5	(62.2)	(7.4)		(1,050.3)	0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	139.9	140.0		140.0					(0.1)
Cumulative translation adjustment	(19.5)	(19.5)			(19.5)
Net change in retirement obligations (net of tax)	0.6	0.6				0.6
Issuance of shares of common stock from issuance of unvested shares, performance share units and exercise of stock options (net of tax)	1.4	1.4						1.4
Repurchase of shares of common stock	(28.3)	(28.3)						(28.3)
Shares surrendered for tax withholding	(4.9)	(4.9)						(4.9)
Share-based compensation	6.6	6.6	6.6
Balance at Mar. 31, 2022	2,898.9	2,899.0	803.1	3,266.5	(81.7)	(6.8)		(1,082.1)	(0.1)
Balance at Dec. 31, 2021	2,803.1	2,803.1	796.5	3,126.5	(62.2)	(7.4)		(1,050.3)	0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	456.7
Net change in retirement obligations (net of tax)	1.8
Repurchase of shares of common stock	(146.8)
Balance at Sep. 30, 2022	2,802.6	2,802.8	812.9	3,447.1	(258.5)	(5.6)		(1,193.1)	(0.2)
Balance at Mar. 31, 2022	2,898.9	2,899.0	803.1	3,266.5	(81.7)	(6.8)		(1,082.1)	(0.1)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	138.1	138.2		138.2					(0.1)
Cumulative translation adjustment	(81.9)	(81.9)			(81.9)
Net change in retirement obligations (net of tax)	0.6	0.6				0.6
Issuance of shares of common stock from issuance of unvested shares, performance share units and exercise of stock options (net of tax)	3.8	3.8						3.8
Repurchase of shares of common stock	(87.5)	(87.5)						(87.5)
Share-based compensation	6.9	6.9	6.9
Cash dividends declared	(90.9)	(90.9)		(90.9)
Balance at Jun. 30, 2022	2,788.0	2,788.2	810.0	3,313.8	(163.6)	(6.2)		(1,165.8)	(0.2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	178.7	178.7		178.7
Cumulative translation adjustment	(94.9)	(94.9)			(94.9)
Net change in retirement obligations (net of tax)	0.6	0.6				0.6
Issuance of shares of common stock from issuance of unvested shares, performance share units and exercise of stock options (net of tax)	3.8	3.8						3.8
Repurchase of shares of common stock	(30.9)	(30.9)						(30.9)
Shares surrendered for tax withholding	(0.2)	(0.2)						(0.2)
Share-based compensation	2.9	2.9	2.9
Cash dividends declared	(45.4)	(45.4)		(45.4)
Balance at Sep. 30, 2022	$ 2,802.6	$ 2,802.8	$ 812.9	$ 3,447.1	$ (258.5)	$ (5.6)		$ (1,193.1)	$ (0.2)