Condensed Consolidated Statements of Changes in Shareholders’ Equity (Unaudited) - USD ($) shares in Millions, $ in Millions	Total	Cumulative effect of an accounting change	Common Stock	Capital In Excess Of Par	Retained Earnings	Retained Earnings Cumulative effect of an accounting change	Treasury Shares, at cost	Accumulated Other Comprehensive Loss	Non controlling Interests
Beginning balance (in shares) at Dec. 31, 2019			234.9
Beginning balance at Dec. 31, 2019	$ 1,409.6	$ (1.5)	$ 249.9	$ 1,474.1	$ 443.2	$ (1.5)	$ (417.5)	$ (395.5)	$ 55.4
Comprehensive income (loss):
Net income	52.4				52.2				0.2
Net realized and unrealized gain (loss) on derivatives, net of tax	(34.7)							(34.7)
Long-term employee benefit plans, net of tax	(0.4)							(0.4)
Foreign currency translation, net of tax	(86.5)							(83.3)	(3.2)
Total comprehensive income (loss)	(69.2)				52.2			(118.4)	(3.0)
Recognition of stock-based compensation	5.1			5.1
Shares issued under compensation plans (in shares)			0.4
Shares issued under compensation plans	(1.1)		$ 0.5	(1.6)
Changes in ownership of noncontrolling interests	(1.6)			0.5					(2.1)
Dividends declared to noncontrolling interests	(0.5)								(0.5)
Ending balance (in shares) at Mar. 31, 2020			235.3
Ending balance at Mar. 31, 2020	1,340.8		$ 250.4	1,478.1	493.9		(417.5)	(513.9)	49.8
Beginning balance (in shares) at Dec. 31, 2019			234.9
Beginning balance at Dec. 31, 2019	1,409.6	$ (1.5)	$ 249.9	1,474.1	443.2	$ (1.5)	(417.5)	(395.5)	55.4
Comprehensive income (loss):
Net income	51.7
Total comprehensive income (loss)	(25.8)
Ending balance (in shares) at Sep. 30, 2020			235.5
Ending balance at Sep. 30, 2020	1,384.7		$ 250.6	1,484.1	493.6		(418.4)	(470.2)	45.0
Beginning balance (in shares) at Mar. 31, 2020			235.3
Beginning balance at Mar. 31, 2020	1,340.8		$ 250.4	1,478.1	493.9		(417.5)	(513.9)	49.8
Comprehensive income (loss):
Net income	(83.2)				(82.8)				(0.4)
Net realized and unrealized gain (loss) on derivatives, net of tax	(2.2)							(2.2)
Long-term employee benefit plans, net of tax	0.4							0.4
Foreign currency translation, net of tax	7.0							6.1	0.9
Total comprehensive income (loss)	(78.0)				(82.8)			4.3	0.5
Recognition of stock-based compensation	6.1			6.1
Shares issued under compensation plans (in shares)			0.1
Shares issued under compensation plans	1.2		$ 0.1	1.1
Changes in redeemable noncontrolling interests	(10.6)			(5.8)					(4.8)
Common stock purchases	(0.9)						(0.9)
Ending balance (in shares) at Jun. 30, 2020			235.4
Ending balance at Jun. 30, 2020	1,258.6		$ 250.5	1,479.5	411.1		(418.4)	(509.6)	45.5
Comprehensive income (loss):
Net income	82.5				82.5
Net realized and unrealized gain (loss) on derivatives, net of tax	6.0							6.0
Long-term employee benefit plans, net of tax	(0.5)							(0.5)
Foreign currency translation, net of tax	33.4							33.9	(0.5)
Total comprehensive income (loss)	121.4				82.5			39.4	(0.5)
Recognition of stock-based compensation	4.7			4.7
Shares issued under compensation plans (in shares)			0.1
Shares issued under compensation plans	0.0		$ 0.1	(0.1)
Ending balance (in shares) at Sep. 30, 2020			235.5
Ending balance at Sep. 30, 2020	1,384.7		$ 250.6	1,484.1	493.6		(418.4)	(470.2)	45.0
Beginning balance (in shares) at Dec. 31, 2020			234.8
Beginning balance at Dec. 31, 2020	1,479.8		$ 250.9	1,487.1	563.3		(443.5)	(424.8)	46.8
Comprehensive income (loss):
Net income	15.7				15.2				0.5
Net realized and unrealized gain (loss) on derivatives, net of tax	7.9							7.9
Long-term employee benefit plans, net of tax	0.7							0.7
Foreign currency translation, net of tax	(37.6)							(37.4)	(0.2)
Total comprehensive income (loss)	(13.3)				15.2			(28.8)	0.3
Recognition of stock-based compensation	3.6			3.6
Shares issued under compensation plans (in shares)			0.3
Shares issued under compensation plans	0.1		$ 0.3	(0.2)
Common stock purchases (in shares)			(2.3)
Common stock purchases	(63.7)						(63.7)
Dividends declared to noncontrolling interests	(0.7)								(0.7)
Ending balance (in shares) at Mar. 31, 2021			232.8
Ending balance at Mar. 31, 2021	1,405.8		$ 251.2	1,490.5	578.5		(507.2)	(453.6)	46.4
Beginning balance (in shares) at Dec. 31, 2020			234.8
Beginning balance at Dec. 31, 2020	1,479.8		$ 250.9	1,487.1	563.3		(443.5)	(424.8)	46.8
Comprehensive income (loss):
Net income	211.0
Total comprehensive income (loss)	$ 197.4
Shares issued under compensation plans (in shares)	0.5
Ending balance (in shares) at Sep. 30, 2021			228.3
Ending balance at Sep. 30, 2021	$ 1,487.1		$ 251.7	1,510.7	774.0		(657.3)	(438.3)	46.3
Beginning balance (in shares) at Mar. 31, 2021			232.8
Beginning balance at Mar. 31, 2021	1,405.8		$ 251.2	1,490.5	578.5		(507.2)	(453.6)	46.4
Comprehensive income (loss):
Net income	126.4				126.4
Net realized and unrealized gain (loss) on derivatives, net of tax	5.9							5.9
Long-term employee benefit plans, net of tax	1.0							1.0
Foreign currency translation, net of tax	39.3							38.7	0.6
Total comprehensive income (loss)	172.6				126.4			45.6	0.6
Recognition of stock-based compensation	4.2			4.2
Shares issued under compensation plans (in shares)			0.5
Shares issued under compensation plans	12.7		$ 0.5	12.2
Common stock purchases (in shares)			(1.9)
Common stock purchases	(60.0)						(60.0)
Ending balance (in shares) at Jun. 30, 2021			231.4
Ending balance at Jun. 30, 2021	1,535.3		$ 251.7	1,506.9	704.9		(567.2)	(408.0)	47.0
Comprehensive income (loss):
Net income	68.9				69.1				(0.2)
Net realized and unrealized gain (loss) on derivatives, net of tax	6.3							6.3
Long-term employee benefit plans, net of tax	0.8							0.8
Foreign currency translation, net of tax	(37.9)							(37.4)	(0.5)
Total comprehensive income (loss)	38.1				69.1			(30.3)	(0.7)
Recognition of stock-based compensation	3.9			3.9
Shares issued under compensation plans	(0.1)			(0.1)
Common stock purchases (in shares)			(3.1)
Common stock purchases	(90.1)						(90.1)
Ending balance (in shares) at Sep. 30, 2021			228.3
Ending balance at Sep. 30, 2021	$ 1,487.1		$ 251.7	$ 1,510.7	$ 774.0		$ (657.3)	$ (438.3)	$ 46.3