Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2025	Dec. 31, 2024
Statement of Comprehensive Income [Abstract]
Net income	$ 845	$ 949	$ 1,653	$ 1,647
Other comprehensive income (loss), net of tax
Foreign currency translation adjustment and other	19	(450)	(26)	(105)
Retirement benefits plan activity	2	4	6	7
Other comprehensive income (loss)	21	(446)	(20)	(98)
Less: Other comprehensive loss for noncontrolling interests	0	(1)	0	(1)
Other comprehensive income (loss) attributable to common shareholders	21	(445)	(20)	(97)
Total comprehensive income	$ 866	$ 504	$ 1,633	$ 1,550