Consolidated Statements of Shareholders' Investment - USD ($)	3 Months Ended				12 Months Ended
	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)		236,440,840			236,440,840
Beginning balance		$ 1,937,988,467		$ 1,963,943,128	$ 1,937,988,467	$ 1,963,943,128	$ 1,938,087,820
Issuance of common stock from stock plan transactions					16,602,274	29,808,787	41,803,640
Issuance of common stock related to acquisitions					5,000,012		3,559,229
Repurchases of common stock					(113,894,370)	(324,643,135)	(288,480,506)
Stock-based compensation expense related to stock options, employee stock purchases, restricted stock, and performance share awards					30,228,606	27,421,645	30,797,327
Dividends declared					(112,819,342)	(114,415,382)	(117,528,158)
Net income	$ 86,168,000	$ 87,529,000	$ 84,179,000	$ 113,451,000	318,757,352	360,797,232	347,563,621
Other comprehensive income (loss)					$ (16,070,178)	$ (4,923,808)	8,140,155
Ending balance (in shares)	234,169,335		236,440,840		234,169,335	236,440,840
Ending balance	$ 2,065,792,821		$ 1,937,988,467		$ 2,065,792,821	$ 1,937,988,467	$ 1,963,943,128
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)		236,440,840		243,692,869	236,440,840	243,692,869	251,277,515
Beginning balance		$ 14,186,450		$ 14,621,572	$ 14,186,450	$ 14,621,572	$ 15,076,651
Issuance of common stock from stock plan transactions (in shares)					1,606,965	2,343,169	2,897,689
Issuance of common stock from stock plan transactions					$ 96,418	$ 140,590	$ 173,861
Issuance of common stock related to acquisitions (in shares)					162,433		163,718
Issuance of common stock related to acquisitions					$ 9,746		$ 9,823
Repurchases of common stock (in shares)					(4,040,903)	(9,595,198)	(10,646,053)
Repurchases of common stock					$ (242,454)	$ (575,712)	$ (638,763)
Ending balance (in shares)	234,169,335		236,440,840		234,169,335	236,440,840	243,692,869
Ending balance	$ 14,050,160		$ 14,186,450		$ 14,050,160	$ 14,186,450	$ 14,621,572
Additional  Paid-In Capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance		879,413,385		852,771,508	879,413,385	852,771,508	807,928,139
Issuance of common stock from stock plan transactions					16,505,856	29,668,197	41,629,779
Issuance of common stock related to acquisitions					4,990,266		3,549,406
Repurchases of common stock					(13,638,790)	(30,447,965)	(31,133,143)
Stock-based compensation expense related to stock options, employee stock purchases, restricted stock, and performance share awards					30,228,606	27,421,645	30,797,327
Ending balance	917,499,323		879,413,385		917,499,323	879,413,385	852,771,508
Retained  Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance		1,042,461,388		1,089,698,996	1,042,461,388	1,089,698,996	1,116,372,133
Repurchases of common stock					(100,013,126)	(293,619,458)	(256,708,600)
Dividends declared					(112,819,342)	(114,415,382)	(117,528,158)
Net income					318,757,352	360,797,232	347,563,621
Ending balance	1,148,386,272		1,042,461,388		1,148,386,272	1,042,461,388	1,089,698,996
Accumulated  Other Comprehensive Income (Loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance		$ 1,927,244		$ 6,851,052	1,927,244	6,851,052	(1,289,103)
Other comprehensive income (loss)					(16,070,178)	(4,923,808)	8,140,155
Ending balance	$ (14,142,934)		$ 1,927,244		$ (14,142,934)	$ 1,927,244	$ 6,851,052