Pension and Other Postretirement Benefits (Tables)

12 Months Ended

Apr. 30, 2011


	Pension			Medical and Life			Total
	Benefits			Insurance Benefits			Benefits
Retained earnings	$	(2	)	$	(1	)	$	(3	)
Accumulated other comprehensive income		8			1			9

Total	$	6		$	—		$	6


	Pension						Medical and Life
	Benefits						Insurance Benefits
	2010			2011			2010			2011
Obligation at beginning of year	$	415		$	577		$	44		$	58
Service cost		10			16			1			1
Interest cost		32			33			3			3
Net actuarial loss (gain)		143			10			12			(10	)
Plan amendments		—			—			—			6
Retiree contributions		—			—			2			2
Benefits paid		(23	)		(24	)		(4	)		(4	)
Special termination benefits		—			1			—			—

Obligation at end of year	$	577		$	613		$	58		$	56


									Allocation by Asset Class
	Level 1		Level 2		Level 3		Total		Actual			Target
April 30, 2010:
Commingled trust funds^(a):
Equity funds	$	—	$	176	$	—	$	176		50	%		47	%
Fixed income funds		—		117		—		117		33	%		30	%
Real estate funds		—		14		10		24		7	%		8	%

Total commingled trust funds		—		307		10		317		90	%		85	%

Hedge funds^(b)		—		—		19		19		5	%		5	%
Private equity^(c)		—		—		13		13		4	%		5	%
Cash and temporary investments^(d)		2		—		—		2		1	%		—
Other		—		—		—		—		—			5	%


Total	$	2	$	307	$	42	$	351		100	%		100	%


April 30, 2011:
Commingled trust funds:
Equity funds	$	—	$	232	$	—	$	232		50	%		47	%
Fixed income funds		—		166		—		166		35	%		35	%
Real estate funds		—		18		9		27		6	%		8	%


Total commingled trust funds		—		416		9		425	91	%	90	%

Hedge funds		—		—		24		24	5	%	5	%
Private equity		—		—		16		16	3	%	5	%
Cash and temporary investments		2		—		—		2	1	%	—


Total	$	2	$	416	$	49	$	467	100	%	100	%


(a)		Commingled trust fund valuations are based on the net asset value (NAV) of the funds as determined by the administrator of the fund and reviewed by us. NAV represents the underlying assets owned by the fund, minus liabilities and divided by the number of shares or units outstanding.

(b)		Hedge fund valuations are primarily based on the NAV of the funds as determined by the administrator of the fund and reviewed by us. During our review, we determine whether it is necessary to adjust the valuation for inherent liquidity and redemption issues that may exist within the fund’s underlying assets or fund unit values.

(c)		As of April 30, 2010 and 2011, consists only of limited partnership interests, which are valued at the percentage ownership of total partnership equity as determined by the general partner. These valuations require significant judgment due to the absence of quoted market prices, the inherent lack of liquidity, and the long-term nature of these investments.

(d)		Cash and temporary investments consist of money market funds and are valued at their respective NAVs as determined by those funds each business day.


	Real Estate			Hedge			Private
	Funds			Funds			Equity			Total
Balance as of May 1, 2009	$	15		$	4		$	13		$	32
Return on assets held at end of year		(4	)		1			—			(3	)
Return on assets sold during year		—			(1	)		(1	)		(2	)
Purchases and settlements		—			17			2			19
Sales and settlements		(1	)		(2	)		(1	)		(4	)

Balance as of April 30, 2010		10			19			13			42
Return on assets held at end of year		2			1			1			4
Return on assets sold during year		—			(1	)		—			(1	)
Purchases and settlements		—			6			4			10
Sales and settlements		(3	)		(1	)		(2	)		(6	)

Balance as of April 30, 2011	$	9		$	24		$	16		$	49


	Pension						Medical and Life
	Benefits						Insurance Benefits
	2010			2011			2010			2011
Fair value at beginning of year	$	284		$	351		$	—		$	—
Actual return on plan assets		77			64			—			—
Retiree contributions		—			—			2			2
Company contributions		13			76			2			2
Benefits paid		(23	)		(24	)		(4	)		(4	)

Fair value at end of year	$	351		$	467		$	—		$	—


	Pension						Medical and Life
	Benefits						Insurance Benefits
	2010			2011			2010			2011
Other assets	$	5		$	7		$	—		$	—
Accounts payable and accrued expenses		(3	)		(3	)		(3	)		(3	)
Accrued postretirement benefits		(228	)		(150	)		(55	)		(53	)

Net liability	$	(226	)	$	(146	)	$	(58	)	$	(56	)


Accumulated other comprehensive loss:
Net actuarial loss (gain)	$	299		$	263		$	7		$	(3	)
Prior service cost		4			3			1			6

	$	303		$	266		$	8		$	3


					Accumulated				Projected
					Benefit				Benefit
	Plan Assets				Obligation				Obligation
	2010		2011		2010		2011		2010		2011
Plans with assets in excess of accumulated benefit obligation	$	45	$	50	$	38	$	41	$	40	$	42
Plans with accumulated benefit obligation in excess of assets		306		417		476		505		537		571

Total	$	351	$	467	$	514	$	546	$	577	$	613


	Pension Benefits
	2009			2010			2011
Service cost	$	13		$	10		$	16
Interest cost		30			32			33
Special termination benefits		1			—			1
Expected return on plan assets		(35	)		(34	)		(36	)
Amortization of:
Prior service cost		1			1			1
Net actuarial loss		6			4			18

Net expense	$	16		$	13		$	33


	Medical and Life Insurance Benefits
	2009		2010		2011
Service cost	$	1	$	1	$	1
Interest cost		3		3		3

Net expense	$	4	$	4	$	4


	Pension									Medical and Life
	Benefits									Insurance Benefits
	2009			2010			2011			2009			2010		2011
Prior service cost	$	1		$	—		$	—		$	—		$	—	$	5
Actuarial loss (gain)		92			100			(18	)		(9	)		12		(10	)
Amortization reclassified to net income:
Prior service cost		(1	)		(1	)		(1	)		—			—		—
Net actuarial loss		(6	)		(4	)		(18	)		—			—		—

Net amount recognized in other comprehensive income	$	86		$	95		$	(37	)	$	(9	)	$	12	$	(5	)


	Pension									Medical and Life
	Benefits									Insurance Benefits
	2009			2010			2011			2009			2010			2011
Discount rate		6.87	%		7.94	%		5.91	%		6.87	%		7.80	%		5.78	%
Rate of salary increase		4.00	%		4.00	%		4.00	%		n/a			n/a			n/a
Expected return on plan assets		8.75	%		8.50	%		8.50	%		n/a			n/a			n/a


	Medical and Life
	Insurance Benefits
	2010			2011
Health care cost trend rate assumed for next year:
Present rate before age 65		8.0	%		7.5	%
Present rate age 65 and after		8.0	%		7.5	%