STATEMENTS OF CONSOLIDATED SHAREHOLDERS' EQUITY (UNAUDITED) - USD ($) $ in Millions	Total	Common Stock	Other Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)
Beginning balance at Dec. 31, 2024	$ 4,051.2	$ 92.5	$ 4,576.2	$ 7,246.3	$ (6,988.6)	$ (875.2)
Shareholders' Equity [Roll Forward]
Net income	503.9			503.9
Other comprehensive income	102.3					102.3
Treasury stock purchased	(351.7)				(351.7)
Stock-based compensation activity	31.7	0.1	53.1		(21.5)
Other adjustments	(6.9)		(6.9)
Cash dividends	(200.4)			(200.4)
Ending balance at Mar. 31, 2025	4,130.1	92.6	4,622.4	7,549.8	(7,361.8)	(772.9)
Beginning balance at Dec. 31, 2024	4,051.2	92.5	4,576.2	7,246.3	(6,988.6)	(875.2)
Shareholders' Equity [Roll Forward]
Net income	1,258.6
Other comprehensive income	277.3
Ending balance at Jun. 30, 2025	4,400.9	92.7	4,680.2	8,106.6	(7,880.7)	(597.9)
Beginning balance at Mar. 31, 2025	4,130.1	92.6	4,622.4	7,549.8	(7,361.8)	(772.9)
Shareholders' Equity [Roll Forward]
Net income	754.7			754.7
Other comprehensive income	175.0					175.0
Treasury stock purchased	(518.5)				(518.5)
Stock-based compensation activity	58.4	0.1	58.7		(0.4)
Other adjustments	(0.9)		(0.9)
Cash dividends	(197.9)			(197.9)
Ending balance at Jun. 30, 2025	4,400.9	92.7	4,680.2	8,106.6	(7,880.7)	(597.9)
Beginning balance at Dec. 31, 2025	4,598.3	83.1	4,204.5	1,029.4	(84.3)	(634.4)
Shareholders' Equity [Roll Forward]
Net income	534.7			534.7
Other comprehensive income	47.6					47.6
Treasury stock purchased	(575.6)				(575.6)
Stock-based compensation activity	23.7	0.1	71.5		(47.9)
Other adjustments	(0.5)		(0.5)
Cash dividends	(197.1)			(197.1)
Ending balance at Mar. 31, 2026	4,431.1	83.2	4,275.5	1,367.0	(707.8)	(586.8)
Beginning balance at Dec. 31, 2025	4,598.3	83.1	4,204.5	1,029.4	(84.3)	(634.4)
Shareholders' Equity [Roll Forward]
Net income	1,378.3
Other comprehensive income	40.3
Ending balance at Jun. 30, 2026	3,854.7	83.3	4,322.1	2,013.1	(1,969.7)	(594.1)
Beginning balance at Mar. 31, 2026	4,431.1	83.2	4,275.5	1,367.0	(707.8)	(586.8)
Shareholders' Equity [Roll Forward]
Net income	843.6			843.6
Other comprehensive income	(7.3)					(7.3)
Treasury stock purchased	(1,261.4)				(1,261.4)
Stock-based compensation activity	45.7	0.1	46.1		(0.5)
Other adjustments	0.5		0.5
Cash dividends	(197.5)			(197.5)
Ending balance at Jun. 30, 2026	$ 3,854.7	$ 83.3	$ 4,322.1	$ 2,013.1	$ (1,969.7)	$ (594.1)