Stockholders Equity and Noncontrolling Interests (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Increase (Decrease) In Equity
Balance at beginning of period	$ 9,030.6	$ 7,916.5	$ 7,570.9	$ 8,395.8	$ 7,073.5
Redeemable noncontrolling interest, balance at beginning of period				30.7
Net income, excluding portion attributable to redeemable noncontrolling interest	608.5		517.9	1,688.5	1,425.2
Net income	608.9		518.3	1,689.6	1,426.4
Other comprehensive income (loss), excluding portion attributable to redeemable noncontrolling interests	130.3		(65.7)	14.3	(125.7)
Increase in noncontrolling interests associated with capital contributions	0.4			1.5
Acquisitions resulting in noncontrolling interest			0.2		1.0
Purchase of noncontrolling interest	(0.3)			(1.2)
Distributions to shareholders of noncontrolling interests	(3.0)		(1.4)	(8.4)	(8.0)
Purchase of treasury stock	(176.2)		(149.3)	(520.4)	(469.8)
Retirement of treasury stock	0.0		0.0	0.0	0.0
Stock options exercised	85.2		142.6	319.5	323.6
Dividends declared	(198.9)		(125.6)	(463.4)	(375.7)
Stock-based compensation expense	29.5		26.9	79.9	72.4
Balance at end of period	9,506.1	8,395.8	$ 7,916.5	9,506.1	$ 7,916.5
Redeemable noncontrolling interest, balance at end of period	$ 20.7	30.7		$ 20.7
Dividends [Abstract]
Dividends declared per share (in dollars per share)	$ 0.165		$ 0.105	$ 0.385	$ 0.315
Redeemable Non-Controlling Interest [Member]
Increase (Decrease) In Equity
Redeemable noncontrolling interest, balance at beginning of period	$ 19.9	21.8	$ 21.4	$ 30.7	$ 20.6
Net income, redeemable non-controlling interest	0.4		0.4	1.1	1.2
Redeemable noncontrolling interest, other comprehensive income loss net of tax	0.4		0.0	0.1	0.0
Purchase of noncontrolling interest	0.0			(11.2)
Redeemable noncontrolling interest, balance at end of period	$ 20.7	$ 30.7	$ 21.8	$ 20.7	$ 21.8
Common Stock
Increase (Decrease) In Equity
Balance (in shares)	1,205.6	1,200.6	1,193.4	1,201.3	1,192.0
Balance at beginning of period	$ 1.2	$ 1.2	$ 1.2	$ 1.2	$ 1.2
Retirement of treasury stock	$ 0.0		$ 0.0	$ 0.0	$ 0.0
Retirement of treasury stock (in shares)	0.0		0.0	(5.9)	(8.2)
Stock options exercised	$ 0.0		$ 0.0	$ 0.0	$ 0.0
Stock options exercised (in shares)	3.9		7.2	14.1	16.8
Balance (in shares)	1,209.5	1,201.3	1,200.6	1,209.5	1,200.6
Balance at end of period	$ 1.2	$ 1.2	$ 1.2	$ 1.2	$ 1.2
Treasury Stock
Increase (Decrease) In Equity
Balance (in shares)	(1.8)	(4.1)	(1.5)	(3.5)	(2.4)
Balance at beginning of period	$ (73.8)	$ (170.6)	$ (49.6)	$ (142.8)	$ (79.8)
Purchase of treasury stock	$ (176.2)		$ (149.3)	$ (520.4)	$ (469.8)
Purchase of treasury stock (in shares)	(2.7)		(3.5)	(8.6)	(11.7)
Retirement of treasury stock	$ 0.0		$ 0.0	$ 344.2	$ 320.5
Retirement of treasury stock (in shares)	0.0		0.0	5.9	8.2
Stock options exercised	$ 13.1		$ 28.3	$ 82.1	$ 58.5
Stock options exercised (in shares)	0.3		0.9	2.0	1.8
Balance at end of period	$ (236.9)	$ (142.8)	$ (170.6)	$ (236.9)	$ (170.6)
Balance (in shares)	(4.2)	(3.5)	(4.1)	(4.2)	(4.1)
Additional Paid in Capital
Increase (Decrease) In Equity
Balance at beginning of period	$ 3,349.2	$ 3,014.4	$ 2,859.8	$ 3,100.6	$ 2,649.8
Purchase of noncontrolling interest	(0.2)			(1.1)
Stock options exercised	79.1		127.7	278.2	292.2
Stock-based compensation expense	29.5		26.9	79.9	72.4
Balance at end of period	3,457.6	3,100.6	3,014.4	3,457.6	3,014.4
Retained Earnings
Increase (Decrease) In Equity
Balance at beginning of period	6,352.0	5,669.7	5,294.8	5,921.1	4,979.4
Net income, excluding portion attributable to redeemable noncontrolling interest	604.4		513.9	1,677.8	1,413.6
Retirement of treasury stock	0.0		0.0	(344.2)	(320.5)
Stock options exercised	(7.0)		(13.4)	(40.8)	(27.1)
Dividends declared	(198.9)		(125.6)	(463.4)	(375.7)
Balance at end of period	6,750.5	5,921.1	5,669.7	6,750.5	5,669.7
Accumulated Other Comprehensive Loss
Increase (Decrease) In Equity
Balance at beginning of period	(648.5)	(657.9)	(592.5)	(533.6)	(535.0)
Other comprehensive income (loss), excluding portion attributable to redeemable noncontrolling interests	128.6		(65.4)	13.7	(122.9)
Balance at end of period	(519.9)	(533.6)	(657.9)	(519.9)	(657.9)
Noncontrolling Interests
Increase (Decrease) In Equity
Balance at beginning of period	50.5	59.7	57.2	49.3	57.9
Net income, excluding portion attributable to redeemable noncontrolling interest	4.1		4.0	10.7	11.6
Other comprehensive income (loss), excluding portion attributable to redeemable noncontrolling interests	1.7		(0.3)	0.6	(2.8)
Increase in noncontrolling interests associated with capital contributions	0.4			1.5
Acquisitions resulting in noncontrolling interest			0.2		1.0
Purchase of noncontrolling interest	(0.1)			(0.1)
Distributions to shareholders of noncontrolling interests	(3.0)		(1.4)	(8.4)	(8.0)
Balance at end of period	$ 53.6	$ 49.3	$ 59.7	$ 53.6	$ 59.7