Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Dec. 31, 2013	Jun. 30, 2013
Preferred stock, par value	$ 1.00	$ 1.00
Preferred stock, shares authorized	300,000	300,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.1	$ 0.10
Common stock, shares authorized	1,000,000,000	1,000,000,000
Common stock, shares issued	638,700,000	638,700,000
Common stock, shares outstanding	481,400,000	482,600,000
Treasury stock, shares	157,300,000	156,100,000
Cash [Member]
Collateral Pledged on Reverse Repurchase Agreements Segregated under Securities Exchange Commission Regulation		$ 0.7
Long [Member]
Collateral Pledged on Reverse Repurchase Agreements Segregated under Securities Exchange Commission Regulation		$ 245.2