Fair Value Measurements (Fair Value of Assets and Liabilities Measured on a Recurring Basis) (Details) - USD ($) $ in Millions	Jun. 30, 2017	Jun. 30, 2016
Assets:
Total available-for-sale securities	$ 65	$ 200
Recurring
Assets:
Cash equivalents	739	516
Forward contracts	(21)	19
Total available-for-sale securities	65	200
Other investments	116	103
Liabilities:
Contingent Consideration	(32)	(19)
Recurring | Level 1
Assets:
Cash equivalents	739	516
Forward contracts	0	0
Total available-for-sale securities	0	0
Other investments	116	103
Liabilities:
Contingent Consideration	0	0
Recurring | Level 2
Assets:
Cash equivalents	0	0
Forward contracts	(21)	19
Total available-for-sale securities		200
Other investments	0	0
Liabilities:
Contingent Consideration	0	0
Recurring | Level 3
Assets:
Cash equivalents	0	0
Forward contracts	0	0
Total available-for-sale securities	0	0
Other investments	0	0
Liabilities:
Contingent Consideration	$ (32)	$ (19)