Equity - Changes in equity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended			9 Months Ended
	Mar. 31, 2022	Mar. 31, 2021		Mar. 31, 2022	Mar. 31, 2021
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 8,768,280	$ 7,234,985	[1],[2],[3],[4],[5],[6],[7]	$ 8,413,670	$ 6,241,770	[1],[2],[3],[4],[5],[6],[7]
Net income	348,088	473,239	[1],[2],[3],[4],[5],[6],[7]	1,187,280	1,241,892	[1],[2],[3],[4],[5],[6],[7]
Other comprehensive income (loss)	13,557	(26,247)	[1],[2],[3],[4],[5],[6],[7]	34,605	403,398	[1],[2],[3],[4],[5],[6],[7]
Dividends paid	$ (132,543)	$ (114,106)	[1],[2],[3],[4],[5],[6],[7]	$ (398,099)	$ (341,333)	[1],[2],[3],[4],[5],[6],[7]
Dividends paid (in USD per share)	$ 1.03	$ 0.88		$ 3.09	$ 2.64
Stock incentive plan activity	$ 25,477	$ 4,244	[1],[2],[3],[4],[5],[6],[7]	$ 67,685	$ 26,388	[1],[2],[3],[4],[5],[6],[7]
Liquidation activity				(1,948)
Shares purchased at cost	(50,000)	(50,000)	[1],[2],[3],[4],[5],[6],[7]	(330,334)	(50,000)	[1],[2],[3],[4],[5],[6],[7]
Ending balance	8,972,859	7,522,115	[1],[2],[3],[4],[5],[6],[7]	8,972,859	7,522,115	[1],[2],[3],[4],[5],[6],[7]
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	344,312	385,049		329,619	416,585
Stock incentive plan activity	19,055	(10,552)		33,748	(42,088)
Ending balance	363,367	374,497		363,367	374,497
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	15,488,764	14,184,833		14,915,497	13,643,907
Net income	348,017	473,153		1,186,774	1,241,307
Dividends paid	(132,543)	(113,888)		(398,033)	(341,116)
Ending balance	15,704,238	14,544,098		15,704,238	14,544,098
Accumulated Other Comprehensive (Loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(1,545,093)	(2,130,506)		(1,566,727)	(2,558,875)
Other comprehensive income (loss)	13,833	(25,784)		35,467	402,585
Ending balance	(1,531,260)	(2,156,290)		(1,531,260)	(2,156,290)
Treasury Shares
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(5,623,424)	(5,311,236)		(5,370,605)	(5,364,916)
Stock incentive plan activity	6,422	14,796		33,937	68,476
Shares purchased at cost	(50,000)	(50,000)		(330,334)	(50,000)
Ending balance	(5,667,002)	(5,346,440)		(5,667,002)	(5,346,440)
Noncontrolling Interests
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	13,198	16,322		15,363	14,546
Net income	71	86		506	585
Other comprehensive income (loss)	(276)	(463)		(862)	813
Dividends paid		(218)		(66)	(217)
Liquidation activity				(1,948)
Ending balance	$ 12,993	$ 15,727		$ 12,993	$ 15,727

[1] *Prior period has been adjusted to reflect the change in inventory accounting method, as described in the Company's fiscal 2021 Annual Report on Form 10-K.

[2] *Prior period has been adjusted to reflect the change in inventory accounting method, as described in the Company's fiscal 2021 Annual Report on Form 10-K.

[3] *Prior period has been adjusted to reflect the change in inventory accounting method, as described in the Company's fiscal 2021 Annual Report on Form 10-K.

[4] *Prior period has been adjusted to reflect the change in inventory accounting method, as described in the Company's fiscal 2021 Annual Report on Form 10-K.

[5] *Prior period has been adjusted to reflect the change in inventory accounting method, as described in the Company's fiscal 2021 Annual Report on Form 10-K.

[6] *Prior period has been adjusted to reflect the change in inventory accounting method, as described in the Company's fiscal 2021 Annual Report on Form 10-K.

[7] *Prior period has been adjusted to reflect the change in inventory accounting method, as described in the Company's fiscal 2021 Annual Report on Form 10-K.