Segment Information - Revenue and Long-Lived Assets by Geographic Region (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Segment Reporting Information [Line Items]
Revenues	$ 9,358	$ 9,008	$ 10,074
Total long-lived assets	4,754	4,356
U.S. and Canada
Segment Reporting Information [Line Items]
Revenues	3,550	3,763	4,044
Total long-lived assets	1,429	1,413
Domestic Pension Benefits
Segment Reporting Information [Line Items]
Revenues	3,500	3,700	3,900
Europe
Segment Reporting Information [Line Items]
Revenues	1,672	1,502	1,664
Total long-lived assets	887	805
U.K.
Segment Reporting Information [Line Items]
Revenues	1,300	1,200	1,300
Australasia and Other
Segment Reporting Information [Line Items]
Revenues	4,136	3,743	4,366
Total long-lived assets	2,438	2,138
Australia
Segment Reporting Information [Line Items]
Revenues	$ 3,900	$ 3,500	$ 4,000