Shareholders' Equity (Changes in the Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024
AOCI, Net of Tax [Roll Forward]
Balance at beginning of period	$ (2,921)	$ (3,547)	$ (3,212)	$ (2,957)
Other Comprehensive Income (Loss), Tax			2	(4)
Total other comprehensive income/(loss), net of tax	4	(5)	(9)	(9)
Balance at end of period	(1,898)	(3,359)	(1,898)	(3,359)
Foreign Currency Translation Adjustments
AOCI, Net of Tax [Roll Forward]
Balance at beginning of period			(138)	(137)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax			(13)	(4)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			0	0
Total other comprehensive income/(loss), net of tax			(13)	(4)
Balance at end of period	(151)	(141)	(151)	(141)
Accumulated Other Comprehensive Loss
AOCI, Net of Tax [Roll Forward]
Balance at beginning of period			(167)	(151)
Total other comprehensive income/(loss), net of tax			(9)	(9)
Balance at end of period	(176)	(160)	(176)	(160)
AOCI Attributable to Parent
AOCI, Net of Tax [Roll Forward]
Balance at beginning of period	(180)	(155)	(167)	(151)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax			(10)	(3)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			1	(6)
Balance at end of period	(176)	(160)	(176)	(160)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Noncontrolling Interest
AOCI, Net of Tax [Roll Forward]
Balance at beginning of period			(29)	(14)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax			3	1
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			1	(6)
Total other comprehensive income/(loss), net of tax			4	(5)
Balance at end of period	$ (25)	$ (19)	$ (25)	$ (19)