Segment Information - Revenue and Long-Lived Assets by Geographic Region (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Segment Reporting Information [Line Items]
Revenues:	$ 10,085	$ 9,879	$ 10,385
Total long-lived assets	4,042	4,419
U.S. and Canada
Segment Reporting Information [Line Items]
Revenues:	4,008	3,967	4,097
Total long-lived assets	1,414	1,623
Domestic Pension Benefits
Segment Reporting Information [Line Items]
Revenues:	3,900	3,800	4,000
Europe
Segment Reporting Information [Line Items]
Revenues:	1,737	1,669	1,808
Total long-lived assets	858	843
U.K.
Segment Reporting Information [Line Items]
Revenues:	1,300	1,200	1,400
Australasia and Other
Segment Reporting Information [Line Items]
Revenues:	4,340	4,243	4,480
Total long-lived assets	1,770	1,953
Australia
Segment Reporting Information [Line Items]
Revenues:	$ 4,000	$ 3,900	$ 4,200