Equity - Changes in equity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 10,574,950	$ 8,773,404	$ 10,338,279	$ 8,859,920
Net income	682,057	395,461	1,333,129	783,498
Other comprehensive income	274,146	365,364	52,432	63,652
Dividends paid	$ (190,695)	$ (171,183)	$ (381,115)	$ (342,359)
Dividends paid (in USD per share)	$ 1.48	$ 1.33	$ 2.96	$ 2.66
Stock incentive plan activity	$ 21,920	$ 21,430	$ 71,667	$ 69,765
Acquisition activity			(2,014)
Shares purchased at cost	(49,999)	(50,000)	(99,999)	(100,000)
Ending balance	11,312,379	9,334,476	11,312,379	9,334,476
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 Capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	337,162	360,443	305,522	327,307
Stock incentive plan activity	15,655	17,428	46,880	50,564
Acquisition activity			415
Ending balance	352,817	377,871	352,817	377,871
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	17,501,909	15,878,565	17,041,502	15,661,808
Net income	681,851	395,237	1,332,678	783,091
Dividends paid	(190,307)	(170,919)	(380,727)	(342,016)
Ending balance	17,993,453	16,102,883	17,993,453	16,102,883
Accumulated Other Comprehensive (Loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(1,514,947)	(1,843,780)	(1,292,872)	(1,543,198)
Other comprehensive income	273,731	364,111	51,656	63,529
Ending balance	(1,241,216)	(1,479,669)	(1,241,216)	(1,479,669)
Treasury Shares
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(5,849,265)	(5,723,230)	(5,817,787)	(5,688,429)
Stock incentive plan activity	6,265	4,002	24,787	19,201
Shares purchased at cost	(49,999)	(50,000)	(99,999)	(100,000)
Ending balance	(5,892,999)	(5,769,228)	(5,892,999)	(5,769,228)
Noncontrolling Interests
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	9,568	10,883	11,391	11,909
Net income	206	224	451	407
Other comprehensive income	415	1,253	776	123
Dividends paid	(388)	(264)	(388)	(343)
Acquisition activity			(2,429)
Ending balance	$ 9,801	$ 12,096	$ 9,801	$ 12,096