Equity - Schedule of Changes in Equity (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2026	Mar. 31, 2025
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 14,320	$ 13,127	$ 13,691	$ 12,081
Net income	904	962	2,557	2,609
Other comprehensive income (loss)	(77)	171	(97)	73
Dividends paid	(227)	(210)	(683)	(630)
Stock incentive plan activity	(27)	5	(21)	22
Other	(1)		(1)
Shares purchased at cost, including excise tax	(275)	(655)	(829)	(755)
Ending balance	$ 14,617	$ 13,400	$ 14,617	$ 13,400
Dividends paid (in USD per share)	$ 1.80	$ 1.63	$ 5.40	$ 4.89
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 91	$ 91	$ 91	$ 91
Ending balance	91	91	91	91
Additional Paid-in Capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	822	244	194	264
Stock incentive plan activity	2	(1)	630	(21)
Ending balance	824	243	824	243
Additional Paid-in Capital | Revision of Prior Period, Reclassification, Adjustment
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock incentive plan activity			578
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	22,972	20,332	21,775	19,105
Net income	904	961	2,557	2,608
Dividends paid	(227)	(210)	(683)	(630)
Ending balance	23,649	21,083	23,649	21,083
Accumulated Other Comprehensive Loss
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(903)	(1,535)	(883)	(1,438)
Other comprehensive income (loss)	(77)	171	(97)	74
Ending balance	(980)	(1,364)	(980)	(1,364)
Treasury Shares
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(8,671)	(6,013)	(7,495)	(5,950)
Stock incentive plan activity	(29)	6	(651)	43
Shares purchased at cost, including excise tax	(275)	(655)	(829)	(755)
Ending balance	(8,975)	(6,662)	(8,975)	(6,662)
Treasury Shares | Revision of Prior Period, Reclassification, Adjustment
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock incentive plan activity			(578)
Noncontrolling Interests
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	9	8	9	9
Net income		1		1
Other comprehensive income (loss)				(1)
Other	(1)		(1)
Ending balance	$ 8	$ 9	$ 8	$ 9