Equity - Changes in equity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 13,127,061	$ 11,312,379	$ 12,080,893	$ 10,338,279
Net income	961,186	726,734	2,608,363	2,059,863
Other comprehensive income (loss)	170,768	(167,550)	73,023	(115,118)
Dividends paid	(210,107)	(190,468)	(630,168)	(571,583)
Stock incentive plan activity	6,062	(31,508)	22,859	40,161
Acquisition activity				(2,014)
Shares purchased at cost, including excise tax	(655,145)		(755,145)
Shares purchased at cost		(49,166)		(149,167)
Ending balance	$ 13,399,825	$ 11,600,421	$ 13,399,825	$ 11,600,421
Dividends paid (in USD per share)	$ 1.63	$ 1.48	$ 4.89	$ 4.44
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	244,191	352,817	264,508	305,522
Stock incentive plan activity	(533)	(57,087)	(20,850)	(10,207)
Acquisition activity				415
Ending balance	243,658	295,730	243,658	295,730
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	20,331,500	17,993,453	19,104,599	17,041,502
Net income	960,866	726,574	2,607,828	2,059,252
Dividends paid	(210,107)	(190,468)	(630,168)	(571,195)
Ending balance	21,082,259	18,529,559	21,082,259	18,529,559
Accumulated Other Comprehensive (Loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(1,535,129)	(1,241,216)	(1,438,012)	(1,292,872)
Other comprehensive income (loss)	170,745	(167,158)	73,628	(115,502)
Ending balance	(1,364,384)	(1,408,374)	(1,364,384)	(1,408,374)
Treasury Shares
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(6,012,532)	(5,892,999)	(5,949,646)	(5,817,787)
Stock incentive plan activity	6,595	25,579	43,709	50,368
Shares purchased at cost, including excise tax	(655,145)		(755,145)
Shares purchased at cost		(49,166)		(149,167)
Ending balance	(6,661,082)	(5,916,586)	(6,661,082)	(5,916,586)
Noncontrolling Interests
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	8,508	9,801	8,921	11,391
Net income	320	160	535	611
Other comprehensive income (loss)	23	(392)	(605)	384
Dividends paid				(388)
Acquisition activity				(2,429)
Ending balance	$ 8,851	$ 9,569	$ 8,851	$ 9,569