Statements of Consolidated Shareholders' Equity - USD ($) $ in Millions	Total	Common Stock	Other Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Loss
Beginning balance at Dec. 31, 2021	$ 2,437.2	$ 90.8	$ 3,793.0	$ 2,121.7	$ (2,869.9)	$ (698.4)
Shareholders' Equity [Roll Forward]
Net income	2,020.1			2,020.1
Other comprehensive income (loss)	(2.2)					(2.2)
Treasury stock purchased	(883.2)				(883.2)
Treasury stock issued	22.0		11.0		11.0
Stock-based compensation activity	134.0	0.4	167.1		(33.5)
Other adjustments	(7.3)		(7.2)	(0.1)
Cash dividends	(618.5)			(618.5)
Ending balance at Dec. 31, 2022	3,102.1	91.2	3,963.9	3,523.2	(3,775.6)	(700.6)
Shareholders' Equity [Roll Forward]
Net income	2,388.8			2,388.8
Other comprehensive income (loss)	76.3					76.3
Treasury stock purchased	(1,432.0)				(1,432.0)
Stock-based compensation activity	203.9	0.6	229.3		(26.0)
Other adjustments	0.4		0.4
Cash dividends	(623.7)			(623.7)
Ending balance at Dec. 31, 2023	3,715.8	91.8	4,193.6	5,288.3	(5,233.6)	(624.3)
Shareholders' Equity [Roll Forward]
Net income	2,681.4			2,681.4
Other comprehensive income (loss)	(250.9)					(250.9)
Treasury stock purchased	(1,738.8)				(1,738.8)
Stock-based compensation activity	367.5	0.7	383.0		(16.2)
Other adjustments	(0.4)		(0.4)
Cash dividends	(723.4)			(723.4)
Ending balance at Dec. 31, 2024	$ 4,051.2	$ 92.5	$ 4,576.2	$ 7,246.3	$ (6,988.6)	$ (875.2)