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 Adjustments	Cumulative Unrealized Gain (Loss)  on Derivatives	Treasury Stock	Noncontrolling Interest
Beginning 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)	449.3	449.4		449.4					(0.1)
Cumulative translation adjustment	(75.6)	(75.6)			(75.6)
Net change in retirement obligations (net of tax)	17.0	17.0				17.0
Net change on derivatives designated as cash flow hedges (net of tax)	2.5	2.5					2.5
Net issuance of shares of common stock (net of tax)	13.6	13.6						13.6
Share-based compensation	20.4	20.4	20.4
Cash dividends declared	(164.4)	(164.4)		(164.4)
Ending balance at Dec. 31, 2021	2,803.1	2,803.1	796.5	3,126.5	(62.2)	(7.4)	0.0	(1,050.3)	0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	586.7	586.9		586.9					(0.2)
Cumulative translation adjustment	(74.9)	(74.9)			(74.9)
Net change in retirement obligations (net of tax)	18.3	18.3				18.3
Net change on derivatives designated as cash flow hedges (net of tax)	0.0
Net issuance of shares of common stock (net of tax)	14.1	14.1						14.1
Repurchase of common stock	(148.1)	(148.1)						(148.1)
Share-based compensation	21.6	21.6	21.6
Cash dividends declared	(181.7)	(181.7)		(181.7)
Contributions received from joint venture partner	0.5								0.5
Ending balance at Dec. 31, 2022	3,039.6	3,039.3	818.1	3,531.7	(137.1)	10.9	0.0	(1,184.3)	0.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	595.6	596.1		596.1					(0.5)
Cumulative translation adjustment	87.8	87.8			87.8
Net change in retirement obligations (net of tax)	(7.4)	(7.4)				(7.4)
Net change on derivatives designated as cash flow hedges (net of tax)	0.0
Net issuance of shares of common stock (net of tax)	21.5	21.5						21.5
Repurchase of common stock	(24.2)	(24.2)						(24.2)
Share-based compensation	21.8	21.8	21.8
Cash dividends declared	(193.5)	(193.5)		(193.5)
Ending balance at Dec. 31, 2023	$ 3,541.2	$ 3,541.4	$ 839.9	$ 3,934.3	$ (49.3)	$ 3.5	$ 0.0	$ (1,187.0)	$ (0.2)