Shareholders' Equity (Changes in the Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
AOCI, Net of Tax [Roll Forward]
Balance at beginning of period	$ (2,634)	$ (3,212)
Total other comprehensive income/(loss), net of tax	(4)	12
Other Comprehensive Income (Loss), Tax	(1)	(5)
Balance at end of period	(2,731)	(3,276)
Foreign Currency Translation Adjustments
AOCI, Net of Tax [Roll Forward]
Balance at beginning of period	(141)	(138)
Other comprehensive (loss)/income, before reclassifications	(4)	5
Amounts reclassified to earnings	0	0
Total other comprehensive income/(loss), net of tax	(4)	5
Balance at end of period	(145)	(133)
Accumulated Other Comprehensive Loss
AOCI, Net of Tax [Roll Forward]
Balance at beginning of period	(155)	(167)
Total other comprehensive income/(loss), net of tax	(4)	12
Balance at end of period	(159)	(155)
Accumulated Other Comprehensive Loss
AOCI, Net of Tax [Roll Forward]
Balance at beginning of period	(155)	(167)
Other comprehensive (loss)/income, before reclassifications	(2)	11
Amounts reclassified to earnings	(2)	1
Balance at end of period	(159)	(155)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Noncontrolling Interest
AOCI, Net of Tax [Roll Forward]
Balance at beginning of period	(14)	(29)
Other comprehensive (loss)/income, before reclassifications	2	6
Amounts reclassified to earnings	(2)	1
Total other comprehensive income/(loss), net of tax	0	7
Balance at end of period	$ (14)	$ (22)