POSTRETIREMENT BENEFITS AND EMPLOYEE STOCK OWNERSHIP PLAN - ESOP SHARES OUTSTANDING (DETAILS) (USD $) In Billions, except Share data in Thousands, unless otherwise specified							12 Months Ended		12 Months Ended
	Jun. 30, 2014 Series A Preferred Stock	Jun. 30, 2013 Series A Preferred Stock	Jun. 30, 2012 Series A Preferred Stock	Jun. 30, 2014 Series B Preferred Stock	Jun. 30, 2013 Series B Preferred Stock	Jun. 30, 2012 Series B Preferred Stock	Jun. 30, 2014 Pension Plan [Member] Series A Preferred Stock	Jun. 30, 1989 Pension Plan [Member] Series A Preferred Stock	Jun. 30, 2014 Other Postretirement Benefit Plan [Member] Series B Preferred Stock	Jun. 30, 1991 Other Postretirement Benefit Plan [Member] Series B Preferred Stock
Preferred Stock, Dividends, Per Share, Cash Paid							$ 2.45		$ 2.45
Employee Stock Ownership Plan (ESOP), Debt Structure, Direct Loan, Amount								$ 1.0		$ 1.0
Allocated	44,465	45,535	50,668	22,085	21,278	20,802
Unallocated	8,474	9,843	11,348	35,753	37,300	38,743
TOTAL	52,939	55,378	62,016	57,838	58,578	59,545