Fair Value Measurements (Fair Value of Assets and Liabilities Measured on a Recurring Basis) (Details) - USD ($) $ in Millions	Jun. 30, 2025	Jun. 30, 2024	Jul. 10, 2023
Transaction Data System Investment
Assets:
Equity ownership percentage	16.00%
Fair Value, Measurements, Recurring
Assets:
Cash equivalents	$ 1,672	$ 1,442
Forward contracts	(48)	(87)
Equity Securities, FV-NI	(843)
Other investments	108	108
Fair Value, Measurements, Recurring | Level 1
Assets:
Cash equivalents	1,672	1,442
Forward contracts	0	0
Equity Securities, FV-NI	0
Other investments	108	108
Fair Value, Measurements, Recurring | Level 2
Assets:
Cash equivalents	0	0
Forward contracts	(48)	(87)
Equity Securities, FV-NI	0
Other investments	0	0
Fair Value, Measurements, Recurring | Level 3
Assets:
Cash equivalents	0	0
Forward contracts	0	0
Equity Securities, FV-NI	(843)
Other investments	$ 0	$ 0
Fair Value, Nonrecurring | Level 3 | Transaction Data System Investment
Assets:
Equity Method Investments, Fair Value Disclosure			$ 147