Shareholders' Equity (Changes in the Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
AOCI, Net of Tax [Roll Forward]
Balance at beginning of period	$ 1,975	$ 1,002	$ 1,792	$ 6,330
Total other comprehensive income/(loss), net of tax	5	(38)	56	(62)
Balance at end of period	1,794	1,206	1,794	1,206
Foreign Currency Translation Adjustments
AOCI, Net of Tax [Roll Forward]
Balance at beginning of period			(92)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax			42
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			0
Total other comprehensive income/(loss), net of tax			42
Balance at end of period	(50)		(50)
Unrealized Gain/(Loss) on Derivatives, net of tax
AOCI, Net of Tax [Roll Forward]
Balance at beginning of period			(12)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax			11
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			3
Total other comprehensive income/(loss), net of tax			14
Balance at end of period	2		2
Accumulated Other Comprehensive Loss
AOCI, Net of Tax [Roll Forward]
Balance at beginning of period			(104)
Total other comprehensive income/(loss), net of tax			56
Balance at end of period	(48)		(48)
AOCI Attributable to Parent
AOCI, Net of Tax [Roll Forward]
Balance at beginning of period	(53)	(103)	(104)	(79)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax			53
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			3
Balance at end of period	$ (48)	$ (141)	$ (48)	$ (141)