Shareholders' Equity (Changes in the Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
AOCI, Net of Tax [Roll Forward]
Balance at beginning of period	$ (3,276)	$ (3,607)	$ (3,212)	$ (2,957)
Other Comprehensive Income (Loss), Tax			2	(1)
Total other comprehensive income/(loss), net of tax	(25)	10	(13)	(4)
Balance at end of period	(2,921)	(3,547)	(2,921)	(3,547)
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			(11)	(5)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			0	0
Total other comprehensive income/(loss), net of tax			(11)	(5)
Balance at end of period	(149)	(142)	(149)	(142)
Unrealized Gain/(Loss) on Derivatives, net of tax
AOCI, Net of Tax [Roll Forward]
Balance at beginning of period			(29)	(14)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax			2	5
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			(4)	(4)
Total other comprehensive income/(loss), net of tax			(2)	1
Balance at end of period	(31)	(13)	(31)	(13)
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			(13)	(4)
Balance at end of period	(180)	(155)	(180)	(155)
AOCI Attributable to Parent
AOCI, Net of Tax [Roll Forward]
Balance at beginning of period	(155)	(165)	(167)	(151)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax			(9)	0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			(4)	(4)
Balance at end of period	$ (180)	$ (155)	$ (180)	$ (155)