Postretirement Benefits (Tables)

9 Months Ended

Mar. 31, 2012

Compensation and Retirement Disclosure [Abstract]

Components of the Net Periodic Benefit Cost

The components of net periodic benefit cost for defined benefit plans are as follows:

	Pension Benefits						Other Retiree Benefits
	Three Months Ended March 31						Three Months Ended March 31
Amounts in millions	2012			2011			2012			2011
Service cost	$	62		$	65		$	35		$	40
Interest cost	149			146			69			72
Expected return on plan assets	(140		)	(123		)	(109		)	(108		)
Amortization of deferred amounts	6			4			(5		)	(3		)
Recognized net actuarial loss	25			39			25			25
Gross benefit cost (credit)	102			131			15			26
Dividends on ESOP preferred stock	—			—			(19		)	(20		)
Net periodic benefit cost (credit)	$	102		$	131		$	(4	)	$	6

	Pension Benefits						Other Retiree Benefits
	Nine Months Ended March 31						Nine Months Ended March 31
Amounts in millions	2012			2011			2012			2011
Service cost	$	192		$	191		$	106		$	110
Interest cost	458			430			207			203
Expected return on plan assets	(428		)	(364		)	(325		)	(323		)
Amortization of deferred amounts	17			13			(15		)	(13		)
Recognized net actuarial loss	77			114			74			72
Gross benefit cost (credit)	316			384			47			49
Dividends on ESOP preferred stock	—			—			(56		)	(59		)
Net periodic benefit cost (credit)	$	316		$	384		$	(9	)	$	(10	)