Condensed Consolidated Statement of Equity Statement - USD ($) shares in Thousands, $ in Millions	Total	Preferred stock	Common stock	Additional paid-in capital	Accumulated Other Comprehensive Income	Retained earnings	Treasury stock	Parent	Noncontrolling interest	2020 Share Repurchase Program	2020 Share Repurchase Program Common stock	2020 Share Repurchase Program Additional paid-in capital	2020 Share Repurchase Program Retained earnings	2020 Share Repurchase Program Treasury stock	2020 Share Repurchase Program Parent
Beginning balance, shares at Dec. 31, 2021		0	170,800
Beginning balance at Dec. 31, 2021	$ 10,959.7	$ 0.0	$ 0.1	$ 68.2	$ (106.7)	$ 13,911.7	$ (2,977.1)	$ 10,896.2	$ 63.5
Beginning balance, treasury stock, shares at Dec. 31, 2021							(23,800)
Net income	2,412.1					2,496.5		2,496.5	(84.4)
Other comprehensive income (loss), net of tax	(56.9)				(56.9)			(56.9)
Capital contribution from noncontrolling interest	$ 12.2								12.2
Repurchase of common stock pursuant to the 2020 Share Repurchase Program, at cost (in shares)	(3,600)													(3,600)
Repurchase of common stock pursuant to the 2020 Share Repurchase Program, at cost	$ (750.0)									$ (750.0)				$ (750.0)	$ (750.0)
Retirement of common stock pursuant to the 2020 Share Repurchase Program, at cost (in shares)											(3,600)			(3,600)
Retirement of common stock pursuant to the 2020 Share Repurchase Program, at cost												$ (257.9)	$ (492.1)	$ 750.0
Issuance of common stock under stock option and stock purchase plans, shares			200
Issuance of common stock under stock option and stock purchase plans	37.5			37.5				37.5
Issuance of common stock under award plan, shares			400
Issuance of common stock under stock award plan	(43.2)			(43.2)		0.0		(43.2)
Compensation related to share-based payments	194.1			194.1				194.1
Other	1.3			1.3				1.3
Ending balance at Sep. 30, 2022	12,766.8	$ 0.0	$ 0.1	0.0	(163.6)	15,916.1	$ (2,977.1)	12,775.5	(8.7)
Ending balance, shares at Sep. 30, 2022		0	167,800
Ending balance, treasury stock, shares at Sep. 30, 2022							(23,800)
Beginning balance, shares at Jun. 30, 2022		0	169,000
Beginning balance at Jun. 30, 2022	11,863.4	$ 0.0	$ 0.1	0.0	(110.4)	14,959.9	$ (2,977.1)	11,872.5	(9.1)
Beginning balance, treasury stock, shares at Jun. 30, 2022							(23,800)
Net income	1,134.9					1,134.7		1,134.7	0.2
Other comprehensive income (loss), net of tax	(53.2)				(53.2)			(53.2)
Capital contribution from noncontrolling interest	$ 0.2								0.2
Repurchase of common stock pursuant to the 2020 Share Repurchase Program, at cost (in shares)	(1,200)													(1,200)
Repurchase of common stock pursuant to the 2020 Share Repurchase Program, at cost	$ (250.0)									$ (250.0)				$ (250.0)	$ (250.0)
Retirement of common stock pursuant to the 2020 Share Repurchase Program, at cost (in shares)											(1,200)			(1,200)
Retirement of common stock pursuant to the 2020 Share Repurchase Program, at cost												$ (71.5)	$ (178.5)	$ 250.0
Issuance of common stock under stock option and stock purchase plans, shares			0
Issuance of common stock under stock option and stock purchase plans	8.6			8.6				8.6
Issuance of common stock under award plan, shares			0
Issuance of common stock under stock award plan	(2.8)			(2.8)		0.0		(2.8)
Compensation related to share-based payments	65.7			65.7				65.7
Ending balance at Sep. 30, 2022	12,766.8	$ 0.0	$ 0.1	0.0	(163.6)	15,916.1	$ (2,977.1)	12,775.5	(8.7)
Ending balance, shares at Sep. 30, 2022		0	167,800
Ending balance, treasury stock, shares at Sep. 30, 2022							(23,800)
Beginning balance, shares at Dec. 31, 2022		0	167,900
Beginning balance at Dec. 31, 2022	13,388.4	$ 0.0	$ 0.1	73.3	(164.9)	16,466.5	$ (2,977.1)	13,397.9	(9.5)
Beginning balance, treasury stock, shares at Dec. 31, 2022							(23,800)
Net income	912.6					911.4		911.4	1.2
Other comprehensive income (loss), net of tax	5.6				5.6			5.6
Capital contribution from noncontrolling interest	4.2								4.2
Issuance of common stock under stock option and stock purchase plans, shares			200
Issuance of common stock under stock option and stock purchase plans	38.7			38.7				38.7
Issuance of common stock under award plan, shares			600
Issuance of common stock under stock award plan	(86.7)			(86.7)				(86.7)
Compensation related to share-based payments	217.8			217.8				217.8
Other	(0.9)			(0.9)				(0.9)
Ending balance at Sep. 30, 2023	14,479.7	$ 0.0	$ 0.1	242.2	(159.3)	17,377.9	$ (2,977.1)	14,483.8	(4.1)
Ending balance, shares at Sep. 30, 2023		0	168,700
Ending balance, treasury stock, shares at Sep. 30, 2023							(23,800)
Beginning balance, shares at Jun. 30, 2023		0	168,600
Beginning balance at Jun. 30, 2023	14,460.5	$ 0.0	$ 0.1	170.7	(172.8)	17,446.0	$ (2,977.1)	14,466.9	(6.4)
Beginning balance, treasury stock, shares at Jun. 30, 2023							(23,800)
Net income	(68.3)					(68.1)		(68.1)	(0.2)
Other comprehensive income (loss), net of tax	13.5				13.5			13.5
Capital contribution from noncontrolling interest	2.5								2.5
Issuance of common stock under stock option and stock purchase plans, shares			100
Issuance of common stock under stock option and stock purchase plans	9.3			9.3				9.3
Issuance of common stock under award plan, shares			0
Issuance of common stock under stock award plan	(2.7)			(2.7)				(2.7)
Compensation related to share-based payments	64.8			64.8				64.8
Other	0.1			0.1				0.1
Ending balance at Sep. 30, 2023	$ 14,479.7	$ 0.0	$ 0.1	$ 242.2	$ (159.3)	$ 17,377.9	$ (2,977.1)	$ 14,483.8	$ (4.1)
Ending balance, shares at Sep. 30, 2023		0	168,700
Ending balance, treasury stock, shares at Sep. 30, 2023							(23,800)