Shareholders' Equity (Changes in the Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
AOCI, Net of Tax [Roll Forward]
Balance at beginning of period	$ 6,043	$ 7,619	$ 6,059	$ 6,828
Total other comprehensive income/(loss), net of tax		90	(19)	120
Balance at end of period	6,232	$ 7,538	6,232	$ 7,538
Foreign Currency Translation Adjustments
AOCI, Net of Tax [Roll Forward]
Balance at beginning of period			(113)
Other comprehensive income/(loss), before reclassifications			(16)
Amounts reclassified to earnings			0
Total other comprehensive income/(loss), net of tax			(16)
Balance at end of period	(129)		(129)
Unrealized Gain/(Loss) on Derivatives, net of tax
AOCI, Net of Tax [Roll Forward]
Balance at beginning of period			21
Other comprehensive income/(loss), before reclassifications			0
Amounts reclassified to earnings			(3)
Total other comprehensive income/(loss), net of tax			(3)
Balance at end of period	18		18
Accumulated Other Comprehensive Income/(Loss)
AOCI, Net of Tax [Roll Forward]
Balance at beginning of period			(92)
Other comprehensive income/(loss), before reclassifications			(16)
Amounts reclassified to earnings			(3)
Total other comprehensive income/(loss), net of tax			(19)
Balance at end of period	$ (111)		$ (111)