Equity - Changes in equity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 12,901,349	$ 10,574,950	$ 12,080,893	$ 10,338,279
Net income	948,649	682,057	1,647,177	1,333,129
Other comprehensive income (loss)	(445,742)	274,146	(97,745)	52,432
Dividends paid	(210,124)	(190,695)	(420,061)	(381,115)
Stock incentive plan activity	(17,071)	21,920	16,796	71,667
Acquisition activity				(2,014)
Shares purchased at cost	(50,000)	(49,999)	(99,999)	(99,999)
Ending balance	$ 13,127,061	$ 11,312,379	$ 13,127,061	$ 11,312,379
Dividends paid (in USD per share)	$ 1.63	$ 1.48	$ 3.26	$ 2.96
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 90,523	$ 90,523	$ 90,523	$ 90,523
Ending balance	90,523	90,523	90,523	90,523
Additional Paid-in Capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	275,019	337,162	264,508	305,522
Stock incentive plan activity	(30,828)	15,655	(20,317)	46,880
Acquisition activity				415
Ending balance	244,191	352,817	244,191	352,817
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	19,593,082	17,501,909	19,104,599	17,041,502
Net income	948,542	681,851	1,646,962	1,332,678
Dividends paid	(210,124)	(190,307)	(420,061)	(380,727)
Ending balance	20,331,500	17,993,453	20,331,500	17,993,453
Accumulated Other Comprehensive (Loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(1,090,435)	(1,514,947)	(1,438,012)	(1,292,872)
Other comprehensive income (loss)	(444,694)	273,731	(97,117)	51,656
Ending balance	(1,535,129)	(1,241,216)	(1,535,129)	(1,241,216)
Treasury Shares
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(5,976,289)	(5,849,265)	(5,949,646)	(5,817,787)
Stock incentive plan activity	13,757	6,265	37,113	24,787
Shares purchased at cost	(50,000)	(49,999)	(99,999)	(99,999)
Ending balance	(6,012,532)	(5,892,999)	(6,012,532)	(5,892,999)
Noncontrolling Interests
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	9,449	9,568	8,921	11,391
Net income	107	206	215	451
Other comprehensive income (loss)	(1,048)	415	(628)	776
Dividends paid		(388)		(388)
Acquisition activity				(2,429)
Ending balance	$ 8,508	$ 9,801	$ 8,508	$ 9,801