Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2018	Jun. 30, 2018
Statement of Financial Position [Abstract]
Property, plant and equipment, accumulated depreciation and amortization	$ 2,109	$ 2,061
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)	128,090,404	127,982,767
Treasury stock, shares (in shares)	30,651,057	30,758,694