Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
	Nov. 30, 2013	Nov. 30, 2012	Nov. 30, 2011
Operating Activities
Net income (loss)	$ 167.9	$ (2.6)	$ 2.9
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Income from discontinued operations, net of income taxes	(0.2)	(3.1)
Depreciation and amortization	43.8	22.3	24.6
Amortization of debt discount and financing costs	4.5	2.9	6.7
Retirement benefit expense	65.0	41.0	46.4
Stock-based compensation	14.1	6.5	3.7
Tax benefit on stock-based awards		(3.3)	(0.2)
Loss on debt repurchased	5.0	0.4	0.2
Loss on bank amendment			1.3
Changes in assets and liabilities, net of effects from acquisition:
Accounts receivable	(37.6)	(4.5)	(0.3)
Inventories	(25.5)	2.6	1.6
Other receivables, prepaid expenses and other	0.1	0.6	2.2
Income tax receivable	(12.6)	6.5	2.3
Real estate held for entitlement and leasing	(4.4)	(3.9)	(4.4)
Receivable from Northrop	(2.7)	(3.0)	(7.7)
Recoverable from the U.S. government and other third parties for environmental remediation costs	21.1	7.5	29.1
Other noncurrent assets	(7.8)	3.2	2.5
Accounts payable	50.1	22.3	6.7
Pension benefits			(3.1)
Postretirement medical and life insurance benefits	(5.4)	(5.1)	(5.5)
Advance payments on contracts	(43.9)	(8.4)	(1.5)
Other current liabilities	56.8	4.7	(1.6)
Deferred income taxes	(191.3)	4.0
Reserve for environmental remediation costs	(18.2)	(1.1)	(27.0)
Other noncurrent liabilities and other	(1.1)	(1.2)	(1.8)
Net cash provided by continuing operations	77.7	88.3	77.1
Net cash used in discontinued operations	(0.1)	(2.1)	(0.3)
Net Cash Provided by Operating Activities	77.6	86.2	76.8
Investing Activities
Capital expenditures	(63.2)	(37.2)	(21.1)
Proceeds from sale of land		0.6
Purchases of marketable securities			(15.0)
Sales of marketable securities			41.7
Purchase of Rocketdyne Business	(411.2)
Purchases of investments	(0.5)
Purchase of restricted cash investments	(470.0)
Sale of restricted cash investments	470.0
Net Cash (Used in) Provided by Investing Activities	(474.9)	(36.6)	5.6
Financing Activities
Proceeds from the issuance of debt	460.0
Repayments on debt	(12.8)	(77.7)	(70.1)
Debt issuance costs	(14.9)	(1.3)	(4.2)
Tax benefit on stock-based awards		3.3	0.2
Proceeds from shares issued under equity plans	0.5	1.0
Vendor financing repayments		(0.8)	(1.8)
Net Cash Provided by (Used in) Financing Activities	432.8	(75.5)	(75.9)
Net increase (decrease) in cash and cash equivalents	35.5	(25.9)	6.5
Cash and cash equivalents at beginning of year	162.1	188.0	181.5
Cash and cash equivalents at end of period	197.6	162.1	188.0
Supplemental Disclosures of Cash Flow Information
Cash refund for income taxes	0.1	6.0	0.2
Cash paid for income taxes	8.5	11.2	3.9
Cash paid for interest	33.7	18.5	22.4
Conversion of debt to common stock	1.6
Purchase of Rocketdyne Business (see Note 4)
Total tangible assets	318.0
Intangible assets	128.3
Goodwill	64.7
Deferred income taxes	12.9
Liabilities assumed	(112.7)
Total preliminary purchase price	$ 411.2