STATEMENTS OF CONSOLIDATED SHAREHOLDERS' EQUITY (UNAUDITED) - USD ($) $ in Millions	Total	Common Stock	Other Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Loss
Beginning balance at Dec. 31, 2020	$ 3,610.8	$ 89.9	$ 3,491.4	$ 844.3	$ (96.5)	$ (718.3)
Shareholders' Equity [Roll Forward]
Net income	409.6			409.6
Other comprehensive (loss) income	(45.5)					(45.5)
Treasury stock purchased	(775.4)				(775.4)
Stock-based compensation activity	30.3	0.3	51.5		(21.5)
Other adjustments	0.7		0.7
Cash dividends	(151.8)			(151.8)
Ending balance at Mar. 31, 2021	3,078.7	90.2	3,543.6	1,102.1	(893.4)	(763.8)
Beginning balance at Dec. 31, 2020	3,610.8	89.9	3,491.4	844.3	(96.5)	(718.3)
Shareholders' Equity [Roll Forward]
Net income	1,560.4
Other comprehensive (loss) income	(68.4)
Ending balance at Sep. 30, 2021	2,690.3	90.5	3,688.1	1,961.8	(2,263.4)	(786.7)
Beginning balance at Mar. 31, 2021	3,078.7	90.2	3,543.6	1,102.1	(893.4)	(763.8)
Shareholders' Equity [Roll Forward]
Net income	648.6			648.6
Other comprehensive (loss) income	62.6					62.6
Treasury stock purchased	(870.1)				(870.1)
Treasury stock issued	11.7		9.3		2.4
Stock-based compensation activity	54.2	0.4	54.6		(0.8)
Other adjustments	0.6		0.6
Cash dividends	(145.9)			(145.9)
Ending balance at Jun. 30, 2021	2,840.4	90.6	3,608.1	1,604.8	(1,761.9)	(701.2)
Shareholders' Equity [Roll Forward]
Net income	502.2			502.2
Other comprehensive (loss) income	(85.5)					(85.5)
Treasury stock purchased	(501.5)				(501.5)
Stock-based compensation activity	80.2		80.2
Other adjustments	(0.3)	(0.1)	(0.2)
Cash dividends	(145.2)			(145.2)
Ending balance at Sep. 30, 2021	2,690.3	90.5	3,688.1	1,961.8	(2,263.4)	(786.7)
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	370.8			370.8
Other comprehensive (loss) income	(43.6)					(43.6)
Treasury stock purchased	(407.1)				(407.1)
Treasury stock issued	22.0		11.0		11.0
Stock-based compensation activity	5.6	0.2	38.3		(32.9)
Other adjustments	0.3		0.4	(0.1)
Cash dividends	(150.9)			(150.9)
Ending balance at Mar. 31, 2022	2,234.3	91.0	3,842.7	2,341.5	(3,298.9)	(742.0)
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	1,633.8
Other comprehensive (loss) income	(364.1)
Ending balance at Sep. 30, 2022	2,597.8	91.1	3,919.6	3,292.6	(3,643.0)	(1,062.5)
Beginning balance at Mar. 31, 2022	2,234.3	91.0	3,842.7	2,341.5	(3,298.9)	(742.0)
Shareholders' Equity [Roll Forward]
Net income	577.9			577.9
Other comprehensive (loss) income	(172.6)					(172.6)
Treasury stock purchased	(296.4)				(296.4)
Stock-based compensation activity	41.5		41.5
Other adjustments	(3.9)		(3.9)	0.1	(0.1)
Cash dividends	(156.2)			(156.2)
Ending balance at Jun. 30, 2022	2,224.6	91.0	3,880.3	2,763.3	(3,595.4)	(914.6)
Shareholders' Equity [Roll Forward]
Net income	685.1			685.1
Other comprehensive (loss) income	(147.9)					(147.9)
Treasury stock purchased	(47.6)				(47.6)
Stock-based compensation activity	39.0	0.1	39.0		(0.1)
Other adjustments	0.4		0.3		0.1
Cash dividends	(155.8)			(155.8)
Ending balance at Sep. 30, 2022	$ 2,597.8	$ 91.1	$ 3,919.6	$ 3,292.6	$ (3,643.0)	$ (1,062.5)