Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2013	Jun. 30, 2012
Statement of Financial Position [Abstract]
Preferred stock, par value	$ 1.00	$ 1.00
Preferred stock, shares authorized	300,000.0	300,000.0
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.10	$ 0.10
Common stock, shares authorized	1,000,000,000.0	1,000,000,000.0
Common stock, shares issued	638,700,000.0	638,700,000.0
Common stock, shares outstanding	485,100,000.0	484,200,000.0
Treasury stock, shares	153,600,000.0	154,500,000.0