Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2021	Jun. 30, 2020
Statement of Financial Position [Abstract]
Property, plant and equipment, accumulated depreciation and amortization	$ 2,351	$ 2,224
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)	130,741,461	158,741,461
Common stock, shares outstanding (in shares)	124,359,712	126,198,606
Treasury stock, shares (in shares)	6,381,749	32,542,855