Consolidated Statements of Equity - USD ($) shares in Millions, $ in Millions	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Total stockholders' equity	Noncontrolling Interests
Balance at Dec. 31, 2020	$ 4,914.6	$ 0.0	$ 2,214.9	$ 2,648.5	$ 39.6	$ 4,903.0	$ 11.6
Balance, Shares at Dec. 31, 2020		110.4
Net income	1,249.1	$ 0.0	0.0	1,241.1	0.0	1,241.1	8.0
Dividends on common shares	(213.0)	0.0	0.0	(213.0)	0.0	(213.0)	0.0
Repurchases of Company shares	(99.2)	$ 0.0	(99.2)	0.0	0.0	(99.2)	0.0
Repurchases of Company shares, shares		(1.7)
Shares issued in connection with share-based compensation	6.3	$ 0.0	10.0	(3.7)	0.0	6.3	0.0
Shares issued in connection with share-based compensation, shares		1.0
Share-based compensation	53.6	$ 0.0	53.6	0.0	0.0	53.6	0.0
Net activity related to noncontrolling interests	(3.6)	0.0	(0.1)	0.0	0.0	(0.1)	(3.5)
Other comprehensive income (loss)	(132.0)	0.0	0.0	0.0	(132.0)	(132.0)	0.0
Balance at Dec. 31, 2021	5,775.8	$ 0.0	2,179.2	3,672.9	(92.4)	5,759.7	16.1
Balance, Shares at Dec. 31, 2021		109.7
Net income	265.3	$ 0.0	0.0	263.0	0.0	263.0	2.3
Dividends on common shares	(217.5)	0.0	0.0	(217.5)	0.0	(217.5)
Repurchases of Company shares	(440.7)	$ 0.0	(440.7)	0.0	0.0	(440.7)	0.0
Repurchases of Company shares, shares		(7.5)
Shares issued in connection with share-based compensation	2.5	$ 0.0	6.6	(4.1)	0.0	2.5	0.0
Shares issued in connection with share-based compensation, shares		1.0
Share-based compensation	67.3	$ 0.0	67.3	0.0	0.0	67.3	0.0
Net activity related to noncontrolling interests	5.0	0.0	0.0	0.0	0.0	0.0	5.0
Other comprehensive income (loss)	(776.5)	0.0	0.0	0.0	(776.5)	(776.5)	0.0
Balance at Dec. 31, 2022	$ 4,681.2	$ 0.0	1,812.4	3,714.3	(868.9)	4,657.8	23.4
Balance, Shares at Dec. 31, 2022	103.2	103.2
Net income	$ 215.5	$ 0.0	0.0	216.8	0.0	216.8	(1.3)
Dividends on common shares	(216.6)	0.0	0.0	(216.6)	0.0	(216.6)	0.0
Repurchases of Company shares	(72.8)	$ 0.0	(72.8)	0.0	0.0	(72.8)	0.0
Repurchases of Company shares, shares		(1.3)
Shares issued in connection with share-based compensation	0.4	$ 0.0	4.3	(3.9)	0.0	0.4	0.0
Shares issued in connection with share-based compensation, shares		1.2
Share-based compensation	49.1	$ 0.0	49.1	0.0	0.0	49.1	0.0
Net activity related to noncontrolling interests	(7.1)	0.0	0.3	0.0	0.0	0.3	(7.4)
Other comprehensive income (loss)	213.1	0.0	0.0	0.0	213.1	213.1	0.0
Balance at Dec. 31, 2023	$ 4,862.8	$ 0.0	$ 1,793.3	$ 3,710.6	$ (655.8)	$ 4,848.1	$ 14.7
Balance, Shares at Dec. 31, 2023	103.1	103.1