Shareholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	9 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Class of Stock [Line Items]
Payments for Repurchase of Common Stock	$ 600	$ 300
Treasury Stock, Shares, Retired	37.0
Treasury Stock, Common, Value	$ (2,500)
Common Stock, Shares, Outstanding	302
Retained earnings	$ 2,200
Treasury Shares
Class of Stock [Line Items]
Treasury shares acquired (using cost method), shares	8.1
Treasury shares acquired, average price per share (in usd per share)	$ 74.08