Stockholders' Equity - Other Comprehensive (Loss) Income (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020
Other comprehensive income (loss), net of tax:
Other comprehensive income (loss), net of tax	$ 92	$ 99	$ (109)
Benefit plan and cumulative translation adjustments
Before tax
Unrealized gains	100	87	(175)
Reclassifications realized in net income, before tax	32	45	29
Cumulative translation adjustment, before Tax	(7)
Other comprehensive income	125	132	(146)
Tax benefit (provision)
Unrealized gains	(25)	(21)	44
Reclassifications realized in net income, tax	(8)	(12)	(7)
Cumulative translation adjustment, tax	0
Other comprehensive income	(33)	(33)	37
Other comprehensive income (loss), net of tax:
Unrealized gains	75	66	(131)
Reclassifications realized in net income, net of tax	24	33	22
Cumulative translation adjustment, net of tax	(7)
Other comprehensive income (loss), net of tax	$ 92	$ 99	$ (109)