Fair Value Measurements Narrative (Details) - Recurring - USD ($) $ in Millions	Sep. 30, 2025	Jun. 30, 2025
Assets:
Other investments	$ 109	$ 108
Forward Contract	(34)	(48)
Liabilities:
Equity Securities, FV-NI	910	843
Level 1
Assets:
Cash equivalents	2,523	1,672
Other investments	109	108
Forward Contract	0	0
Liabilities:
Equity Securities, FV-NI	0	0
Level 2
Assets:
Cash equivalents	0	0
Other investments	0	0
Forward Contract	(34)	(48)
Liabilities:
Equity Securities, FV-NI	0	0
Level 3
Assets:
Cash equivalents	0	0
Other investments	0	0
Forward Contract	0	0
Liabilities:
Equity Securities, FV-NI	910	843
Fair Value, Inputs, Level 1, 2 and 3
Assets:
Cash equivalents	$ 2,523	$ 1,672