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	1,277.2					1,361.8		1,361.8	(84.6)
Other comprehensive income (loss), net of tax	(3.7)				(3.7)			(3.7)
Capital contribution from noncontrolling interest	$ 12.0								12.0
Repurchase of common stock pursuant to the 2020 Share Repurchase Program, at cost (in shares)	(2,400)													(2,400)
Repurchase of common stock pursuant to the 2020 Share Repurchase Program, at cost	$ (500.0)									$ (500.0)				$ (500.0)	$ (500.0)
Retirement of common stock pursuant to the 2020 Share Repurchase Program, at cost (in shares)											(2,400)			(2,400)
Retirement of common stock pursuant to the 2020 Share Repurchase Program, at cost												$ (186.4)	$ (313.6)	$ 500.0
Issuance of common stock under stock option and stock purchase plans, shares			200
Issuance of common stock under stock option and stock purchase plans	28.9			28.9				28.9
Issuance of common stock under award plan, shares			400
Issuance of common stock under stock award plan	(40.4)			(40.4)		0.0		(40.4)
Compensation related to share-based payments	128.4			128.4				128.4
Other	1.3			1.3				1.3
Ending 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)
Ending balance, shares at Jun. 30, 2022		0	169,000
Ending balance, treasury stock, shares at Jun. 30, 2022							(23,800)
Beginning balance, shares at Mar. 31, 2022		0	171,300
Beginning balance at Mar. 31, 2022	11,220.7	$ 0.0	$ 0.1	119.0	(115.2)	14,215.5	$ (2,977.1)	11,242.3	(21.6)
Beginning balance, treasury stock, shares at Mar. 31, 2022							(23,800)
Net income	1,058.7					1,058.0		1,058.0	0.7
Other comprehensive income (loss), net of tax	4.8				4.8			4.8
Capital contribution from noncontrolling interest	$ 11.8								11.8
Repurchase of common stock pursuant to the 2020 Share Repurchase Program, at cost (in shares)	(2,400)													(2,400)
Repurchase of common stock pursuant to the 2020 Share Repurchase Program, at cost	$ (500.0)									$ (500.0)				$ (500.0)	$ (500.0)
Retirement of common stock pursuant to the 2020 Share Repurchase Program, at cost (in shares)											(2,400)			(2,400)
Retirement of common stock pursuant to the 2020 Share Repurchase Program, at cost												$ (186.4)	$ (313.6)	$ 500.0
Issuance of common stock under stock option and stock purchase plans, shares			100
Issuance of common stock under stock option and stock purchase plans	10.0			10.0				10.0
Issuance of common stock under award plan, shares			0
Issuance of common stock under stock award plan	(0.7)			(0.7)		0.0		(0.7)
Compensation related to share-based payments	58.0			58.0				58.0
Other	0.1			0.1				0.1
Ending 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)
Ending balance, shares at Jun. 30, 2022		0	169,000
Ending balance, treasury stock, shares at Jun. 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	980.9					979.5		979.5	1.4
Other comprehensive income (loss), net of tax	(7.9)				(7.9)			(7.9)
Capital contribution from noncontrolling interest	1.7								1.7
Issuance of common stock under stock option and stock purchase plans, shares			100
Issuance of common stock under stock option and stock purchase plans	29.4			29.4				29.4
Issuance of common stock under award plan, shares			600
Issuance of common stock under stock award plan	(84.0)			(84.0)				(84.0)
Compensation related to share-based payments	153.0			153.0				153.0
Other	(1.0)			(1.0)				(1.0)
Ending 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)
Ending balance, shares at Jun. 30, 2023		0	168,600
Ending balance, treasury stock, shares at Jun. 30, 2023							(23,800)
Beginning balance, shares at Mar. 31, 2023		0	168,600
Beginning balance at Mar. 31, 2023	13,787.0	$ 0.0	$ 0.1	91.2	(172.0)	16,854.4	$ (2,977.1)	13,796.6	(9.6)
Beginning balance, treasury stock, shares at Mar. 31, 2023							(23,800)
Net income	593.3					591.6		591.6	1.7
Other comprehensive income (loss), net of tax	(0.8)				(0.8)			(0.8)
Capital contribution from noncontrolling interest	1.5								1.5
Issuance of common stock under stock option and stock purchase plans, shares			0
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	(3.8)			(3.8)				(3.8)
Compensation related to share-based payments	74.1			74.1				74.1
Other	(0.1)			(0.1)				(0.1)
Ending 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)
Ending balance, shares at Jun. 30, 2023		0	168,600
Ending balance, treasury stock, shares at Jun. 30, 2023							(23,800)