CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Millions	Total		Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Treasury Stock, Common
Balance at Beginning of Year at Dec. 31, 2021			$ 30.7	$ 2,408.1	$ (5,164.6)	$ 11,989.4	$ (3,229.7)
Increase (Decrease) in Stockholders' Equity
Common Stock Activity			0.1	32.9
Other Comprehensive Income	$ 1,716.3				1,716.3
Net Income	1,407.2					1,407.2
Dividends to Stockholders (per common share: $1.57; $1.39; $1.26)						(255.3)
Repurchases of Treasury Stock	(200.1)	[1]		0.0			(200.1)
Treasury Stock, Retired, Cost Method, Amount			0.0	0.0		0.0	0.0
Balance at End of Year at Dec. 31, 2022	8,735.0		30.8	2,441.0	(3,448.3)	13,141.3	(3,429.8)
Increase (Decrease) in Stockholders' Equity
Common Stock Activity			0.1	21.3
Other Comprehensive Income	140.3				140.3
Net Income	1,283.8					1,283.8
Dividends to Stockholders (per common share: $1.57; $1.39; $1.26)						(277.1)
Repurchases of Treasury Stock	(252.0)	[1]		0.0			(252.0)
Treasury Stock, Retired, Cost Method, Amount	(3,642.5)		(11.5)	(914.5)		(2,716.5)	(3,642.5)
Balance at End of Year at Dec. 31, 2023	9,651.4		19.4	1,547.8	(3,308.0)	11,431.5	(39.3)
Increase (Decrease) in Stockholders' Equity
Common Stock Activity			0.1	22.1
Other Comprehensive Income	784.3				784.3
Net Income	1,779.1					1,779.1
Dividends to Stockholders (per common share: $1.57; $1.39; $1.26)						(296.6)
Repurchases of Treasury Stock	(979.3)	[1]		(80.3)			(899.0)
Treasury Stock, Retired, Cost Method, Amount			0.0	0.0		0.0	0.0
Balance at End of Year at Dec. 31, 2024	$ 10,961.1		$ 19.5	$ 1,489.6	$ (2,523.7)	$ 12,914.0	$ (938.3)

[1] Includes $80.3 million related to shares which settled in February 2025 in connection with the November 2024 accelerated share repurchase agreement (ASR), a de minimis amount of commissions for the year ended December 31, 2024, and $0.1 million of commissions for the years ended December 31, 2023 and 2022. Also includes $8.3 million and $1.9 million of excise tax for the years ended December 31, 2024 and 2023, respectively. There were no excise taxes during the year ended December 31, 2022.