Condensed Consolidated Statement of Equity Statement - USD ($) shares in Millions, $ in Millions	Total	Preferred stock	Common stock	Additional paid-in capital	Accumulated Other Comprehensive Income	Retained earnings	Treasury stock	Parent	Noncontrolling interest	2018 Share Repurchase Program	2018 Share Repurchase Program Common stock	2018 Share Repurchase Program Additional paid-in capital	2018 Share Repurchase Program Retained earnings	2018 Share Repurchase Program Treasury stock	2018 Share Repurchase Program Parent	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	December 2019 Share Repurchase Program	December 2019 Share Repurchase Program Common stock	December 2019 Share Repurchase Program Additional paid-in capital	December 2019 Share Repurchase Program Retained earnings	December 2019 Share Repurchase Program Treasury stock	December 2019 Share Repurchase Program Parent
Beginning balance, shares at Dec. 31, 2019		0.0	(198.0)				(23.8)
Beginning balance at Dec. 31, 2019	$ 13,339.1	$ 0.0	$ 0.1	$ 0.0	$ (135.2)	$ 16,455.4	$ (2,977.1)	$ 13,343.2	$ (4.1)
Net income	2,999.0					2,941.2		2,941.2	57.8
Other comprehensive income (loss), net of tax	(44.0)				(45.8)			(45.8)	1.8
Distribution to noncontrolling interest	(75.0)								(75.0)
Repurchase of common stock, at cost, shares														(12.2)						(4.1)
Repurchase of common stock, at cost										$ (3,750.0)				$ (3,750.0)	$ (3,750.0)	$ (1,279.1)				$ (1,279.1)	$ (1,279.1)
Retirement of common stock pursuant to Share Repurchase Programs, at cost, shares											(12.2)			(12.2)			(4.1)			(4.1)
Retirement of common stock pursuant to Share Repurchase Progams, at cost										0.0	$ 0.0	$ (76.2)	$ (3,673.8)	$ 3,750.0	0.0			$ (71.0)	$ (1,208.1)	$ 1,279.1
Issuance of common stock under stock option and stock purchase plans, shares			0.1
Issuance of common stock under stock option and stock purchase plans	29.1		$ 0.0	29.1				29.1
Issuance of common stock under award plan, shares			0.3
Issuance of common stock under stock award plan	(48.0)		$ 0.0	0.0		(48.0)		(48.0)
Compensation related to share-based payments	118.8			118.8		0.0		118.8
Stockholders' Equity, Other	0.7			0.7				0.7
Ending balance at Jun. 30, 2020	11,289.2	$ 0.0	$ 0.1	0.0	(181.0)	14,466.7	$ (2,977.1)	11,308.7	(19.5)
Ending balance, shares at Jun. 30, 2020		0.0	(182.1)				(23.8)
Beginning balance, shares at Mar. 31, 2020		0.0	(191.1)				(23.8)
Beginning balance at Mar. 31, 2020	12,536.9	$ 0.0	$ 0.1	0.1	(149.3)	15,673.1	$ (2,977.1)	12,546.9	(10.0)
Net income	1,606.5					1,542.1		1,542.1	64.4
Other comprehensive income (loss), net of tax	(30.6)				(31.7)			(31.7)	1.1
Repurchase of common stock, at cost, shares														(9.0)		(4.1)						(12.2)
Repurchase of common stock, at cost										(2,808.9)				$ (2,808.9)	(2,808.9)
Retirement of common stock pursuant to Share Repurchase Programs, at cost, shares											(9.0)			(9.0)
Retirement of common stock pursuant to Share Repurchase Progams, at cost										$ 0.0	$ 0.0	$ (60.7)	$ (2,748.2)	$ 2,808.9	$ 0.0
Issuance of common stock under stock option and stock purchase plans, shares			0.0
Issuance of common stock under stock option and stock purchase plans	11.1		$ 0.0	11.1				11.1
Issuance of common stock under award plan, shares			0.0
Issuance of common stock under stock award plan	(0.3)		$ 0.0	0.0		(0.3)		(0.3)
Compensation related to share-based payments	49.5			49.5		0.0		49.5
Ending balance at Jun. 30, 2020	11,289.2	$ 0.0	$ 0.1	0.0	(181.0)	14,466.7	$ (2,977.1)	11,308.7	(19.5)
Ending balance, shares at Jun. 30, 2020		0.0	(182.1)				(23.8)
Beginning balance, shares at Dec. 31, 2020		0.0	(176.2)				(23.8)
Beginning balance at Dec. 31, 2020	10,686.1	$ 0.0	$ 0.1	0.0	(299.0)	13,976.3	$ (2,977.1)	10,700.3	(14.2)
Net income	1,430.1					858.7		858.7	571.4
Other comprehensive income (loss), net of tax	127.8				127.2			127.2	0.6
Capital contribution by noncontrolling interest	5.1								5.1
Distribution to noncontrolling interest	(100.0)								(100.0)
Repurchase of common stock, at cost, shares																				(3.8)
Repurchase of common stock, at cost																$ (1,050.0)				$ (1,050.0)	$ (1,050.0)
Retirement of common stock pursuant to Share Repurchase Programs, at cost, shares																	(3.8)			(3.8)
Retirement of common stock pursuant to Share Repurchase Progams, at cost																$ 0.0		$ (163.3)	$ (886.7)	$ 1,050.0
Issuance of common stock under stock option and stock purchase plans, shares			0.2
Issuance of common stock under stock option and stock purchase plans	33.4		$ 0.0	33.4				33.4
Issuance of common stock under award plan, shares			0.3
Issuance of common stock under stock award plan	(47.6)		$ 0.0	0.0		(47.6)		(47.6)
Compensation related to share-based payments	128.4			128.4				128.4
Stockholders' Equity, Other	1.5			1.5		0.0		1.5
Ending balance at Jun. 30, 2021	11,214.8	$ 0.0	$ 0.1	0.0	(171.8)	13,900.7	$ (2,977.1)	10,751.9	462.9
Ending balance, shares at Jun. 30, 2021		0.0	(172.9)				(23.8)
Beginning balance, shares at Mar. 31, 2021		0.0	(174.4)				(23.8)
Beginning balance at Mar. 31, 2021	10,663.2	$ 0.0	$ 0.1	0.0	(174.3)	13,833.5	$ (2,977.1)	10,682.2	(19.0)
Net income	1,025.5					448.5		448.5	577.0
Other comprehensive income (loss), net of tax	2.4				2.5			2.5	(0.1)
Capital contribution by noncontrolling interest	5.0							0.0	5.0
Distribution to noncontrolling interest	(100.0)								(100.0)
Repurchase of common stock, at cost, shares			0.0																			(9.0)				(1.6)
Repurchase of common stock, at cost																						$ (450.0)				$ (450.0)	$ (450.0)
Retirement of common stock pursuant to Share Repurchase Programs, at cost, shares																							(1.6)			(1.6)
Retirement of common stock pursuant to Share Repurchase Progams, at cost																						$ 0.0	$ 0.0	$ (69.5)	$ (380.5)	$ 450.0	$ 0.0
Issuance of common stock under stock option and stock purchase plans, shares			0.1
Issuance of common stock under stock option and stock purchase plans	13.7		$ 0.0	13.7				13.7
Issuance of common stock under award plan, shares			0.0
Issuance of common stock under stock award plan	(0.8)		$ 0.0	0.0		(0.8)		(0.8)
Compensation related to share-based payments	55.8			55.8				55.8
Stockholders' Equity, Other	0.0			0.0		0.0		0.0
Ending balance at Jun. 30, 2021	$ 11,214.8	$ 0.0	$ 0.1	$ 0.0	$ (171.8)	$ 13,900.7	$ (2,977.1)	$ 10,751.9	$ 462.9
Ending balance, shares at Jun. 30, 2021		0.0	(172.9)				(23.8)