Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2017	Jun. 30, 2017
Statement of Financial Position [Abstract]
Property, plant and equipment, accumulated depreciation and amortization	$ 2,015	$ 2,001
Preferred stock, par value (in dollars per share)	$ 1.00	$ 1.00
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 1.00	$ 1.00
Common stock, shares authorized (in shares)	750,000,000	750,000,000
Common stock, shares issued (in shares)	158,741,461	158,741,461
Common stock, shares outstanding (in shares)	128,923,671	129,014,172
Treasury stock, shares (in shares)	29,817,790	29,727,289