Equity - Changes in equity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019	Jul. 01, 2018	Jun. 30, 2018
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 6,342,501	$ 5,821,166	$ 5,968,152	$ 5,865,493
Impact of adoption of accounting standards					$ (1,734)	$ (251)
Net income	367,369	411,381	911,008	1,099,193
Other comprehensive income (loss)	(250,690)	66,626	(137,386)	35,915
Dividends paid	(113,266)	(98,548)	(340,291)	(299,006)
Stock incentive plan activity	8,273	15,423	46,449	64,704
Acquisition activity	7		6,262
Shares purchased at cost	(46,767)	(200,000)	(146,767)	(750,000)
Ending balance	$ 6,307,427	$ 6,016,048	$ 6,307,427	$ 6,016,048
Cash dividends per common share (in USD per share)	$ 0.88	$ 0.76	$ 2.64	$ 2.28
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	455,862	521,854	462,086	496,592
Stock incentive plan activity	(3,705)	7,289	(9,929)	32,551
Ending balance	452,157	529,143	452,157	529,143
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	13,094,252	12,114,448	12,777,538	11,625,975
Impact of adoption of accounting standards						1,483
Net income	367,253	411,248	910,625	1,098,696
Dividends paid	(113,214)	(98,484)	(339,872)	(298,942)
Ending balance	13,348,291	12,427,212	13,348,291	12,427,212
Accumulated Other Comprehensive (Loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(1,945,732)	(1,795,497)	(2,059,048)	(1,763,086)
Impact of adoption of accounting standards						$ (1,734)
Other comprehensive income (loss)	(249,730)	66,582	(136,414)	35,905
Ending balance	(2,195,462)	(1,728,915)	(2,195,462)	(1,728,915)
Treasury Shares
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(5,364,730)	(5,116,119)	(5,309,130)	(4,590,138)
Stock incentive plan activity	11,978	8,134	56,378	32,153
Shares purchased at cost	(46,767)	(200,000)	(146,767)	(750,000)
Ending balance	(5,399,519)	(5,307,985)	(5,399,519)	(5,307,985)
Noncontrolling Interests
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	12,326	5,957	6,183	5,627
Net income	116	133	383	497
Other comprehensive income (loss)	(960)	44	(972)	10
Dividends paid	(52)	(64)	(419)	(64)
Acquisition activity	7		6,262
Ending balance	$ 11,437	$ 6,070	$ 11,437	$ 6,070