Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Nov. 30, 2011	Nov. 30, 2010
Current Assets
Cash and cash equivalents	$ 188.0	$ 181.5
Marketable securities	0	26.7
Accounts receivable	107.0	106.7
Inventories	49.5	51.1
Recoverable from the U.S. government and other third parties for environmental remediation costs	29.6	32.0
Grantor trust	1.3	1.8
Other receivables, prepaid expenses and other	20.2	25.3
Income taxes	5.3	7.5
Total Current Assets	400.9	432.6
Noncurrent Assets
Property, plant and equipment, net	126.9	126.4
Real estate held for entitlement and leasing	63.3	59.9
Recoverable from the U.S. government and other third parties for environmental remediation costs	114.1	140.8
Grantor trust	13.3	14.5
Goodwill	94.9	94.9
Intangible assets	15.4	16.9
Other noncurrent assets, net	110.7	105.5
Total Noncurrent Assets	538.6	558.9
Total Assets	939.5	991.5
Current Liabilities
Short-term borrowings and current portion of long-term debt	2.8	66.0
Accounts payable	33.8	27.1
Reserves for environmental remediation costs	40.7	40.7
Postretirement medical and life benefits	6.8	7.1
Advance payments on contracts	108.5	110.0
Deferred income taxes	3.1	0
Other current liabilities	104.1	110.3
Total Current Liabilities	299.8	361.2
Noncurrent Liabilities
Senior debt	47.5	50.6
Senior subordinated notes	75.0	75.0
Convertible subordinated notes	200.2	200.0
Other debt	0.9	1.1
Deferred income taxes	4.5	7.6
Reserves for environmental remediation costs	149.9	177.0
Pension benefits	236.4	175.5
Postretirement medical and life benefits	68.4	71.8
Other noncurrent liabilities	64.1	66.8
Total Noncurrent Liabilities	846.9	825.4
Total Liabilities	1,146.7	1,186.6
Commitments and Contingencies (Note 7)
Redeemable common stock, par value of $0.10; 0.4 million shares issued and outstanding as of November 30, 2011 ; 0.5 million shares issued and outstanding as of and November 30, 2010 (Note 8)	4.4	5.1
Shareholders' Deficit
Preference stock, par value of $1.00; 15.0 million shares authorized; none issued or outstanding
Common stock, par value of $0.10; 150.0 million shares authorized; 58.4 million shares issued and outstanding as of November 30, 2011; 58.1 million shares issued and outstanding as of November 30, 2010	5.9	5.9
Other capital	261.2	257.3
Accumulated deficit	(179.3)	(182.2)
Accumulated other comprehensive loss, net of income taxes	(299.4)	(281.2)
Total Shareholders' Deficit	(211.6)	(200.2)
Total Liabilities, Redeemable Common Stock and Shareholders' Deficit	$ 939.5	$ 991.5