CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY Statement - USD ($) $ in Millions	Total	Common Class B [Member]	Common Stock [Member]	Series A Preferred Stock [Member]	AOCI Attributable to Parent [Member]	Noncontrolling Interest [Member]	Retained Earnings [Member]	Additional Paid-in Capital [Member]	Treasury Stock, Common [Member]
Common stock		$ 0.0	$ 0.7
Common Stock, Shares, Issued		4,339,431	68,162,297
Additional capital	$ 1,969.3
Retained Earnings (Accumulated Deficit)	3,004.7
Treasury Stock, Value	(956.2)
Stockholders' Equity Attributable to Noncontrolling Interest	(6.3)
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (236.0)
Preferred stock, $.01 par value; 20,000,000 shares authorized, no shares issued or outstanding				$ 0.0
Preferred stock, shares issued (in shares)				21,612
Treasury Stock, Common, Shares	22,026,922
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 3,776.2
Stock Issued, Value, Stock Options Exercised, Net of Tax Benefit (Expense)	(0.6)		$ 0.0						$ 0.6
APIC, Share-based Payment Arrangement, Recognition and Exercise	0.0
Shares Granted, Value, Share-based Payment Arrangement, after Forfeiture	8.9
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation	(15.9)		$ 0.0				$ 8.1	$ 7.8
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period			365,833						858
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation			(129,869)
Net Income (Loss) Attributable to Parent	181.2
Dividends, Preferred Stock	(14.4)
Net Income (Loss) Attributable to Noncontrolling Interest	0.4					$ 0.4
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	31.6				$ 31.6
Net Income (Loss) Attributable to Parent	401.9
Dividends, Preferred Stock	(28.7)
Net Income (Loss) Attributable to Noncontrolling Interest	0.8
Common stock		$ 0.0	$ 0.7
Common Stock, Shares, Issued		4,339,431	68,398,261
Additional capital	1,970.4
Retained Earnings (Accumulated Deficit)	3,163.4
Treasury Stock, Value	(956.8)
Stockholders' Equity Attributable to Noncontrolling Interest	(5.9)
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (204.4)
Preferred stock, $.01 par value; 20,000,000 shares authorized, no shares issued or outstanding				$ 0.0
Preferred stock, shares issued (in shares)				21,612
Treasury Stock, Common, Shares	22,027,780
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 3,967.4
Stock Issued, Value, Stock Options Exercised, Net of Tax Benefit (Expense)	(0.3)		$ 0.0						$ 0.3
APIC, Share-based Payment Arrangement, Recognition and Exercise	0.0
Shares Granted, Value, Share-based Payment Arrangement, after Forfeiture	15.8
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation	0.0		$ 0.0				0.0	0.0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period			11,648						2,301
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation			(908)
Net Income (Loss) Attributable to Parent	220.7
Dividends, Preferred Stock	(14.4)
Stockholders' Equity, Other							1.2	(0.2)
Net Income (Loss) Attributable to Noncontrolling Interest	0.4					0.4
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(78.4)				(79.4)
Common stock		$ 0.0	$ 0.7
Common Stock, Shares, Issued		4,339,431	68,409,001
Additional capital	1,986.0
Retained Earnings (Accumulated Deficit)	3,370.9
Stockholders' Equity Attributable to Noncontrolling Interest	(5.5)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(283.8)
Treasury stock, at cost; 22,211,365 and 22,115,653 shares in 2023 and 2022, respectively	$ (957.1)
Preferred stock, $.01 par value; 20,000,000 shares authorized, no shares issued or outstanding				$ 0.0
Preferred stock, shares issued (in shares)				21,612
Treasury Stock, Common, Shares	22,030,081
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 4,111.2
Common stock		$ 0.0	$ 0.7
Common Stock, Shares, Issued		4,339,431	68,535,704
Additional capital	2,005.4
Retained Earnings (Accumulated Deficit)	3,795.0
Treasury Stock, Value	(969.1)
Stockholders' Equity Attributable to Noncontrolling Interest	(4.7)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(377.7)
Treasury stock, at cost; 22,211,365 and 22,115,653 shares in 2023 and 2022, respectively	$ (969.1)
Preferred stock, $.01 par value; 20,000,000 shares authorized, no shares issued or outstanding				$ 0.0
Preferred stock, shares issued (in shares)				21,612
Treasury Stock, Common, Shares	22,115,653
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 4,449.6
Stock Issued, Value, Stock Options Exercised, Net of Tax Benefit (Expense)	(12.6)		$ 0.0						$ 12.9
APIC, Share-based Payment Arrangement, Recognition and Exercise	0.3
Shares Granted, Value, Share-based Payment Arrangement, after Forfeiture	11.7
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation	(38.7)		$ 0.0				24.5	14.2
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period			811,309						79,817
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation			(236,953)
Net Income (Loss) Attributable to Parent	197.1
Dividends, Preferred Stock	(14.4)
Stockholders' Equity, Other							(1.0)	0.1
Net Income (Loss) Attributable to Noncontrolling Interest	0.1					0.1
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	16.1				17.0
Dividends, Common Stock	(19.2)
Net Income (Loss) Attributable to Parent	390.2
Net Income (Loss) Attributable to Noncontrolling Interest	(0.6)
Common stock		$ 0.0	$ 0.7
Common Stock, Shares, Issued		4,339,431	69,110,060
Additional capital	2,003.3
Retained Earnings (Accumulated Deficit)	3,933.0
Treasury Stock, Value	(982.0)
Stockholders' Equity Attributable to Noncontrolling Interest	(4.6)
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (360.7)
Preferred stock, $.01 par value; 20,000,000 shares authorized, no shares issued or outstanding				$ 0.0
Preferred stock, shares issued (in shares)				21,612
Treasury Stock, Common, Shares	22,195,470
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 4,589.7
Stock Issued, Value, Stock Options Exercised, Net of Tax Benefit (Expense)	(2.4)		$ 0.0						$ 2.5
APIC, Share-based Payment Arrangement, Recognition and Exercise	0.1
Shares Granted, Value, Share-based Payment Arrangement, after Forfeiture	12.2
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation	(0.2)		$ 0.0				0.1	$ 0.1
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period			56,044						15,895
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation			(1,111)
Net Income (Loss) Attributable to Parent	193.1
Dividends, Preferred Stock	(14.4)
Stockholders' Equity, Other							$ 1.0
Net Income (Loss) Attributable to Noncontrolling Interest	(0.7)					$ (0.7)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	42.2				$ 41.2
Dividends, Common Stock	(19.2)
Common stock		$ 0.0	$ 0.7
Common Stock, Shares, Issued		4,339,431	69,164,993
Additional capital	2,015.5
Retained Earnings (Accumulated Deficit)	4,093.4
Stockholders' Equity Attributable to Noncontrolling Interest	(5.3)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(319.5)
Treasury stock, at cost; 22,211,365 and 22,115,653 shares in 2023 and 2022, respectively	$ (984.5)
Preferred stock, $.01 par value; 20,000,000 shares authorized, no shares issued or outstanding				$ 0.0
Preferred stock, shares issued (in shares)				21,612
Treasury Stock, Common, Shares	22,211,365
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 4,800.3