CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Millions	Total		Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Retained Earnings	Treasury Stock, Common
Balance at Beginning of Year at Dec. 31, 2024			$ 19.5	$ 1,489.6	$ (2,523.7)	$ 12,914.0	$ (938.3)
Increase (Decrease) in Stockholders' Equity
Common Stock Activity				(1.2)
Cost of Shares Repurchased	$ (202.6)	[1]		(80.3)			(282.9)
Other Comprehensive Income	344.9				344.9
Net Income	189.1					189.1
Dividends to Stockholders (per common share: $0.46; $0.42)						(77.3)
Balance at End of Year at Mar. 31, 2025	11,214.0			1,568.7	(2,178.8)	13,025.8	(1,221.2)
Balance at End of Year at Dec. 31, 2025	11,119.1		$ 19.6	1,593.0	(1,808.5)	13,345.3	(2,030.3)
Increase (Decrease) in Stockholders' Equity
Common Stock Activity				9.1
Cost of Shares Repurchased	(402.4)	[1]		0.0			(402.4)
Other Comprehensive Income	13.0				13.0
Net Income	232.0					232.0
Dividends to Stockholders (per common share: $0.46; $0.42)						(78.4)
Balance at End of Year at Mar. 31, 2026	$ 10,892.4			$ 1,602.1	$ (1,795.5)	$ 13,498.9	$ (2,432.7)

[1] 2Includes $0.1 million and $0.5 million of commissions for the three months ended March 31, 2026 and 2025, respectively. Also includes $3.7 million and $2.1 million of excise taxes for the three months ended March 31, 2026 and 2025, respectively.