INVESTMENTS (Details) - USD ($) $ in Millions	Dec. 31, 2015	Jun. 30, 2015
Gains and losses recorded in AOCI
Cost	$ 1,258.8	$ 918.0
Gross Unrealized Gains	0.1	0.3
Gross Unrealized Losses	(3.5)	(0.5)
Fair Value	1,255.4	917.8
U.S. government and agency securities
Gains and losses recorded in AOCI
Cost	402.2	265.8
Gross Unrealized Gains		0.1
Gross Unrealized Losses	(1.8)	(0.1)
Fair Value	400.4	265.8
Foreign government and agency securities
Gains and losses recorded in AOCI
Cost	34.4	23.9
Gross Unrealized Losses	(0.1)
Fair Value	34.3	23.9
Corporate notes and bonds
Gains and losses recorded in AOCI
Cost	352.4	182.7
Gross Unrealized Gains	0.1	0.1
Gross Unrealized Losses	(1.6)	(0.4)
Fair Value	350.9	182.4
Time deposits
Gains and losses recorded in AOCI
Cost	446.9	410.8
Fair Value	446.9	410.8
Other securities
Gains and losses recorded in AOCI
Cost	22.9	34.8
Gross Unrealized Gains		0.1
Fair Value	$ 22.9	$ 34.9