Fair Value Measurements (Reconciliation of Liabilities Measured at Fair Value on a Recurring Basis Using Unobservable Inputs (Level 3)) (Details) - Fair Value, Measurements, Recurring - Contingent Consideration Obligation - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	$ 32	$ 19
Additions from acquisitions	5	21
Changes in fair value of contingent consideration	(2)	(5)
Payment of contingent consideration	35	3
Balance at end of period	$ 1	$ 32