Equity - Schedule of Changes in Equity (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2025	Dec. 31, 2024
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 13,786	$ 12,901	$ 13,691	$ 12,081
Net income	845	949	1,653	1,647
Other comprehensive income (loss)	21	(446)	(20)	(98)
Dividends paid	(228)	(210)	(456)	(420)
Stock incentive plan activity	(29)	(17)	6	17
Shares purchased at cost, including excise tax	(75)		(554)
Shares purchased at cost	(75)	(50)	(550)	(100)
Ending balance	$ 14,320	$ 13,127	$ 14,320	$ 13,127
Dividends paid (in USD per share)	$ 1.80	$ 1.63	$ 3.60	$ 3.26
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	823	275	194	264
Stock incentive plan activity	(1)	(31)	628	(20)
Ending balance	822	244	822	244
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	22,355	19,593	21,775	19,105
Net income	845	949	1,653	1,647
Dividends paid	(228)	(210)	(456)	(420)
Ending balance	22,972	20,332	22,972	20,332
Accumulated Other Comprehensive Loss
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(924)	(1,090)	(883)	(1,438)
Other comprehensive income (loss)	21	(445)	(20)	(97)
Ending balance	(903)	(1,535)	(903)	(1,535)
Treasury Shares
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(8,568)	(5,977)	(7,495)	(5,950)
Stock incentive plan activity	(28)	14	(622)	37
Shares purchased at cost, including excise tax	(75)		(554)
Shares purchased at cost		(50)		(100)
Ending balance	(8,671)	(6,013)	(8,671)	(6,013)
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	9	9	9
Other comprehensive income (loss)		(1)		(1)
Ending balance	$ 9	$ 8	$ 9	$ 8