Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2011	Jun. 30, 2011
Consolidated Balance Sheets [Abstract]
Preferred stock, par value	$ 1.00	$ 1.00
Preferred stock, shares authorized	0.3	0.3
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.10	$ 0.10
Common stock, shares authorized	1,000.0	1,000.0
Common stock, shares issued	638.7	638.7
Common stock, shares outstanding	489.1	490.8
Treasury stock, shares	149.6	147.9