Equity - Changes in equity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended			9 Months Ended
	Mar. 31, 2023	Mar. 31, 2022		Mar. 31, 2023	Mar. 31, 2022
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 9,334,476	$ 8,768,280		$ 8,859,920	$ 8,413,670
Net income	590,960	348,088	[1]	1,374,458	1,187,280	[1]
Other comprehensive income (loss)	90,742	13,557		154,394	34,605
Dividends paid	$ (170,872)	$ (132,543)		$ (513,231)	$ (398,099)
Dividends paid (in USD per share)	$ 1.33	$ 1.03		$ 3.99	$ 3.09
Stock incentive plan activity	$ (2,141)	$ 25,477		$ 67,624	$ 67,685
Liquidation activity					(1,948)
Shares purchased at cost	(50,000)	(50,000)		(150,000)	(330,334)
Ending balance	9,793,165	8,972,859		9,793,165	8,972,859
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	377,871	344,312		327,307	329,619
Stock incentive plan activity	(22,117)	19,055		28,447	33,748
Ending balance	355,754	363,367		355,754	363,367
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	16,102,883	15,488,764		15,661,808	14,915,497
Net income	590,889	348,017		1,373,980	1,186,774
Dividends paid	(170,872)	(132,543)		(512,888)	(398,033)
Ending balance	16,522,900	15,704,238		16,522,900	15,704,238
Accumulated Other Comprehensive (Loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(1,479,669)	(1,545,093)		(1,543,198)	(1,566,727)
Other comprehensive income (loss)	91,041	13,833		154,570	35,467
Ending balance	(1,388,628)	(1,531,260)		(1,388,628)	(1,531,260)
Treasury Shares
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(5,769,228)	(5,623,424)		(5,688,429)	(5,370,605)
Stock incentive plan activity	19,976	6,422		39,177	33,937
Shares purchased at cost	(50,000)	(50,000)		(150,000)	(330,334)
Ending balance	(5,799,252)	(5,667,002)		(5,799,252)	(5,667,002)
Noncontrolling Interests
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	12,096	13,198		11,909	15,363
Net income	71	71		478	506
Other comprehensive income (loss)	(299)	(276)		(176)	(862)
Dividends paid				(343)	(66)
Liquidation activity					(1,948)
Ending balance	$ 11,868	$ 12,993		$ 11,868	$ 12,993

[1] *Prior period amounts have been reclassified to reflect the income statement reclassification as described in Note 1.