Shareholders' Equity (Changes in the Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
AOCI, Net of Tax [Roll Forward]
Balance at beginning of period	$ 6,330	$ 6,059
Total other comprehensive income/(loss), net of tax	(22)	(4)
Balance at end of period	903	5,913
Foreign Currency Translation Adjustments
AOCI, Net of Tax [Roll Forward]
Balance at beginning of period	(95)
Other comprehensive income/(loss), before reclassifications	(17)
Amounts reclassified to earnings	0
Total other comprehensive income/(loss), net of tax	(17)
Balance at end of period	(112)
Unrealized Gain/(Loss) on Derivatives, net of tax
AOCI, Net of Tax [Roll Forward]
Balance at beginning of period	16
Other comprehensive income/(loss), before reclassifications	0
Amounts reclassified to earnings	(5)
Total other comprehensive income/(loss), net of tax	(5)
Balance at end of period	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	(22)
Balance at end of period	(101)
AOCI Attributable to Parent
AOCI, Net of Tax [Roll Forward]
Balance at beginning of period	(79)	(92)
Other comprehensive income/(loss), before reclassifications	(17)
Amounts reclassified to earnings	(5)
Balance at end of period	$ (101)	$ (96)