Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	May. 31, 2015	May. 31, 2014
Operating Activities
Net income (loss)	$ 14.5	$ (53.2)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
(Income) loss from discontinued operations, net of income taxes	(0.2)	0.8
Depreciation and amortization	32.1	30.6
Amortization of financing costs	1.4	1.8
Stock-based compensation	7.3	3.0
Retirement benefit expense	33.4	17.8
Loss on debt repurchased	0.7	50.8
Loss on bank amendment	0.0	0.2
Loss on disposal of long-lived assets	0.2	0.0
Tax benefit on stock-based awards	(1.5)	(1.3)
Changes in assets and liabilities:
Accounts receivable	(0.8)	21.5
Inventories	(11.3)	(25.1)
Other current assets, net	(7.5)	3.7
Income tax receivable	0.0	3.2
Real estate held for entitlement and leasing	(4.0)	(3.6)
Receivable from Northrop	5.1	(1.2)
Recoverable from the U.S. government and other third parties for environmental remediation costs	0.1	6.6
Other noncurrent assets	(9.0)	(15.6)
Accounts payable	(15.9)	(28.0)
Postretirement medical and life benefits	(2.6)	(3.2)
Advance payments on contracts	(1.2)	6.1
Other current liabilities	(25.6)	(27.7)
Deferred income taxes	(0.9)	(3.6)
Reserves for environmental remediation costs	(4.5)	(7.6)
Other noncurrent liabilities	18.6	1.8
Net cash provided by (used in) continuing operations	28.4	(22.2)
Net cash used in discontinued operations	0.0	(0.1)
Net cash (used in) provided by operating activities	28.4	(22.3)
Investing Activities
Capital expenditures	(9.4)	(18.5)
Net cash used in investing activities	(9.4)	(18.5)
Financing Activities
Proceeds from issuance of debt	0.0	179.0
Debt issuance costs	0.0	(4.1)
Debt repayments/repurchases	(28.5)	(145.8)
Repurchase of shares to satisfy tax withholding obligations	(4.4)	(2.0)
Purchase of treasury stock	0.0	(64.5)
Tax benefit on stock-based awards	1.5	1.3
Net cash used in financing activities	(31.4)	(36.1)
Net (decrease) increase in cash and cash equivalents	(12.4)	(76.9)
Cash and Cash Equivalents at Beginning of Period	265.9	197.6
Cash and Cash Equivalents at End of Period	253.5	120.7
Supplemental disclosures of cash flow information
Cash paid for interest	25.9	23.7
Cash paid for income taxes	10.2	1.7
Conversion of debt to common stock	$ 35.8	$ 0.0