RETIREMENT INCOME AND HEALTH CARE BENEFIT PLANS (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plans [Line Items]
Service Cost	$ 1	$ 0	$ 2	$ 1
Interest Cost	6	7	12	14
Expected return on plan assets	(8)	(7)	(15)	(15)
Amortization of unrecognized items	4	2	6	4
Net periodic benefit cost	3	2	5	4
Retirement Health Care Plans [Member]
Defined Benefit Plans [Line Items]
Net periodic benefit cost	1		1
Retirement Health Care Plans [Member] | Less Than [Member]
Defined Benefit Plans [Line Items]
Net periodic benefit cost		$ 1		$ 1