Shareholders' Equity (Changes in the Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
AOCI, Net of Tax [Roll Forward]
Balance at beginning of period	$ 1,002	$ 6,043	$ 6,330	$ 6,059
Total other comprehensive income/(loss), net of tax	(38)	12	(62)	(19)
Balance at end of period	1,206	6,232	1,206	6,232
Foreign Currency Translation Adjustments
AOCI, Net of Tax [Roll Forward]
Balance at beginning of period			(95)
Other comprehensive loss, before reclassifications			(35)
Amounts reclassified to earnings			0
Total other comprehensive income/(loss), net of tax			(35)
Balance at end of period	(130)		(130)
Unrealized Gain/(Loss) on Derivatives, net of tax
AOCI, Net of Tax [Roll Forward]
Balance at beginning of period			16
Other comprehensive loss, before reclassifications			(22)
Amounts reclassified to earnings			(5)
Total other comprehensive income/(loss), net of tax			(27)
Balance at end of period	(11)		(11)
Accumulated Other Comprehensive Loss
AOCI, Net of Tax [Roll Forward]
Balance at beginning of period			(79)
Total other comprehensive income/(loss), net of tax			(62)
Balance at end of period	(141)		(141)
AOCI Attributable to Parent
AOCI, Net of Tax [Roll Forward]
Balance at beginning of period	(103)	(123)	(79)	(92)
Other comprehensive loss, before reclassifications			(57)
Amounts reclassified to earnings			(5)
Balance at end of period	$ (141)	$ (111)	$ (141)	$ (111)