Segment Information - Revenue and Long-Lived Assets by Geographic Region (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Segment Reporting Information [Line Items]
Revenues	$ 9,879	$ 10,385	$ 9,358
Total long-lived assets	4,419	4,378
U.S. and Canada
Segment Reporting Information [Line Items]
Revenues	3,967	4,097	3,550
Total long-lived assets	1,623	1,513
Domestic Pension Benefits
Segment Reporting Information [Line Items]
Revenues	3,800	4,000	3,500
Europe
Segment Reporting Information [Line Items]
Revenues	1,669	1,808	1,672
Total long-lived assets	843	774
U.K.
Segment Reporting Information [Line Items]
Revenues	1,200	1,400	1,300
Australasia and Other
Segment Reporting Information [Line Items]
Revenues	4,243	4,480	4,136
Total long-lived assets	1,953	2,091
Australia
Segment Reporting Information [Line Items]
Revenues	$ 3,900	$ 4,200	$ 3,900