Postretirement Benefits (Tables)

3 Months Ended

9 Months Ended

Mar. 31, 2013

Mar. 31, 2013

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	2013			2012			2013			2012
Service cost	$	76		$	62		$	48		$	35
Interest cost	140			149			65			69
Expected return on plan assets	(146		)	(140		)	(95		)	(109		)
Amortization of deferred amounts	4			6			(5		)	(5		)
Recognized net actuarial loss	55			25			49			25
Settlement loss	2			—			—			—
Gross benefit cost	131			102			62			15
Dividends on ESOP preferred stock	—			—			(17		)	(19		)
Net periodic benefit cost (credit)	$	131		$	102		$	45		$	(4	)

	Pension Benefits						Other Retiree Benefits
	Nine Months Ended March 31						Nine Months Ended March 31
Amounts in millions	2013			2012			2013			2012
Service cost	$	226		$	192		$	143		$	106
Interest cost	421			458			195			207
Expected return on plan assets	(442		)	(428		)	(286		)	(325		)
Amortization of deferred amounts	13			17			(15		)	(15		)
Recognized net actuarial loss	161			77			149			74
Curtailment loss	2			—			—			—
Settlement loss	2			—			—			—
Gross benefit cost	383			316			186			47
Dividends on ESOP preferred stock	—			—			(52		)	(56		)
Net periodic benefit cost (credit)	$	383		$	316		$	134		$	(9	)