POSTRETIREMENT BENEFITS AND EMPLOYEE STOCK OWNERSHIP PLAN - FAIR VALUE OF PLAN ASETS (DETAILS) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2012
Pension Benefits
Fair value of plan assets	$ 11,098	[1]	$ 8,561	[1]	$ 7,974	[1]
Pension Benefits | Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets	84		75
Pension Benefits | Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets	10,875		8,354
Pension Benefits | Fair Value, Inputs, Level 3
Fair value of plan assets	139		132
Pension Benefits | Cash and Cash Equivalents
Fair value of plan assets	79		71
Pension Benefits | Cash and Cash Equivalents | Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets	79		71
Pension Benefits | Cash and Cash Equivalents | Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets	0		0
Pension Benefits | Cash and Cash Equivalents | Fair Value, Inputs, Level 3
Fair value of plan assets	0		0
Pension Benefits | Common Collective Trust Fund - Equity
Fair value of plan assets	5,336		3,993
Pension Benefits | Common Collective Trust Fund - Equity | Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets	0		0
Pension Benefits | Common Collective Trust Fund - Equity | Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets	5,336		3,993
Pension Benefits | Common Collective Trust Fund - Equity | Fair Value, Inputs, Level 3
Fair value of plan assets	0		0
Pension Benefits | Common Collective Trust Fund - Fixed Income
Fair value of plan assets	5,539		4,361
Pension Benefits | Common Collective Trust Fund - Fixed Income | Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets	0		0
Pension Benefits | Common Collective Trust Fund - Fixed Income | Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets	5,539		4,361
Pension Benefits | Common Collective Trust Fund - Fixed Income | Fair Value, Inputs, Level 3
Fair value of plan assets	0		0
Pension Benefits | Other Assets
Fair value of plan assets	144		136
Pension Benefits | Other Assets | Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets	5		4
Pension Benefits | Other Assets | Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets	0		0
Pension Benefits | Other Assets | Fair Value, Inputs, Level 3
Fair value of plan assets	139		132
Other Retiree Benefits
Fair value of plan assets	3,574	[2]	3,553	[2]	2,713	[2]
Other Retiree Benefits | Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets	30		56
Other Retiree Benefits | Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets	3,539		3,486
Other Retiree Benefits | Fair Value, Inputs, Level 3
Fair value of plan assets	5		11
Other Retiree Benefits | Cash and Cash Equivalents
Fair value of plan assets	30		56
Other Retiree Benefits | Cash and Cash Equivalents | Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets	30		56
Other Retiree Benefits | Cash and Cash Equivalents | Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets	0		0
Other Retiree Benefits | Cash and Cash Equivalents | Fair Value, Inputs, Level 3
Fair value of plan assets	0		0
Other Retiree Benefits | Company Stock
Fair value of plan assets	3,304		3,270
Other Retiree Benefits | Company Stock | Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets	0		0
Other Retiree Benefits | Company Stock | Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets	3,304		3,270
Other Retiree Benefits | Company Stock | Fair Value, Inputs, Level 3
Fair value of plan assets	0		0
Other Retiree Benefits | Common Collective Trust Fund - Equity
Fair value of plan assets	18		16
Other Retiree Benefits | Common Collective Trust Fund - Equity | Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets	0		0
Other Retiree Benefits | Common Collective Trust Fund - Equity | Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets	18		16
Other Retiree Benefits | Common Collective Trust Fund - Equity | Fair Value, Inputs, Level 3
Fair value of plan assets	0		0
Other Retiree Benefits | Common Collective Trust Fund - Fixed Income
Fair value of plan assets	217		200
Other Retiree Benefits | Common Collective Trust Fund - Fixed Income | Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets	0		0
Other Retiree Benefits | Common Collective Trust Fund - Fixed Income | Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets	217		200
Other Retiree Benefits | Common Collective Trust Fund - Fixed Income | Fair Value, Inputs, Level 3
Fair value of plan assets	0		0
Other Retiree Benefits | Other Assets
Fair value of plan assets	5		11
Other Retiree Benefits | Other Assets | Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets	0		0
Other Retiree Benefits | Other Assets | Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets	0		0
Other Retiree Benefits | Other Assets | Fair Value, Inputs, Level 3
Fair value of plan assets	$ 5		$ 11

[1] Primarily non-U.S.-based defined benefit retirement plans.

[2] Primarily U.S.-based other postretirement benefit plans.