Fair Value Measurements (Reconciliation of Liabilities Measured at Fair Value on a Recurring Basis Using Unobservable Inputs (Level 3)) (Details) - Recurring - Contingent Consideration Obligation $ in Millions	9 Months Ended
	Mar. 31, 2018 USD ($)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	$ 32
Additions from acquisitions	5
Changes in fair value of contingent consideration	(2)
Payment of contingent consideration	(22)
Balance at end of period	$ 14