CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $) In Thousands	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010
CASH PROVIDED BY (USED IN) OPERATIONS:
Net income	$ 497,931	$ 155,539
Adjustments to reconcile net income to net cash provided by operations:
Depreciation and amortization	99,930	91,950
Material charges (Note 2)	0	42,024
Deferred income taxes	70,692	6,146
Provision for pension and postretirement benefits	16,664	19,329
Stock-based compensation expense	10,999	7,049
Gain on disposals of property, plant and equipment	(3,896)	(95)
Gain on sale of manufacturing operations	(660,877)	0
Postretirement benefit claims paid	(1,388)	(1,713)
Contributions to pension plans	(35,837)	(42,110)
Changes in current assets and liabilities:
Receivables - trade and other	9,962	(9,346)
Inventories	(104,468)	28,573
Prepaid expenses and other current assets	1,511	953
Accounts payable	44,820	(17,242)
Accrued income taxes	130,210	(29,549)
Deferred revenues	27,603	(23,357)
Billings in excess of costs and estimated profits on uncompleted contracts	29,493	(3,624)
Other current liabilities	4,461	(12,873)
Net changes in other noncurrent assets and liabilities	8,089	(1,369)
Net cash provided by operations	145,899	210,285
CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES:
Capital expenditures	(930,978)	(210,383)
Proceeds from sale of manufacturing operations	1,044,541	0
Decrease in restricted cash	15,265	0
Proceeds from disposals of property, plant and equipment	4,057	878
Net cash provided by (used in) investing activities	132,885	(209,505)
CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES:
Repayments of borrowings	(26,083)	(32,461)
Excess tax benefits from stock-based compensation	4,664	15
Proceeds from stock options and other	16,483	2,924
Net cash used in financing activities	(4,936)	(29,522)
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	273,848	(28,742)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	437,479	639,681
CASH AND CASH EQUIVALENTS, END OF PERIOD	$ 711,327	$ 610,939

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Includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Entity may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash amounts may be reported as Cash and Cash Equivalents, while legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits are not generally reported as cash and cash equivalents. Includes cash and cash equivalents associated with the entity's continuing operations. Excludes cash and cash equivalents associated with the disposal group (and discontinued operation).

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The component of income tax expense for the period representing the increase (decrease) in the entity's deferred tax assets and liabilities pertaining to continuing operations.

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The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

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Reductions in the entity's income taxes that arise when compensation cost (from non-qualified share-based compensation) recognized on the entity's tax return exceeds compensation cost from equity-based compensation recognized in financial statements. This element represents the cash inflow reported in the enterprise's financing activities.

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The gains (losses) included in earnings resulting from the sale or disposal of tangible assets. This item does not include any gain (loss) recognized on the sale of oil and gas property or timber property.

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The increase (decrease) during the reporting period in the amount due from customers for the credit sale of goods and services; includes accounts receivable and other types of receivables.

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Change in recurring obligations of a business that arise from the acquisition of merchandise, materials, supplies and services used in the production and sale of goods and services.

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The increase (decrease) during the period in the amount due for taxes based on the reporting entity's earnings or attributable to the entity's income earning process (business presence) within a given jurisdiction.

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The increase (decrease) during the reporting period in the liability reflecting cash payments received before the related costs have been incurred.

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The increase (decrease) during the reporting period, excluding the portion taken into income, in the liability reflecting revenue yet to be earned for which cash or other forms of consideration was received or recorded as a receivable.

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The net cash inflow or outflow from investing activity.

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The net cash from (used in) all of the entity's operating activities, including those of discontinued operations, of the reporting entity. Operating activities generally involve producing and delivering goods and providing services. Operating activity cash flows include transactions, adjustments, and changes in value that are not defined as investing or financing activities. While for technical reasons this element has no balance attribute, the default assumption is a debit balance consistent with its label.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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-Publisher FASB
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The amount of cash or cash equivalents contributed during the reporting period by the entity to fund non-pension postretirement benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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The cash outflow for purchases of and capital improvements on property, plant and equipment (capital expenditures), software, and other intangible assets.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-Name Accounting Standards Codification
-Glossary Investing Activities
-URI http://asc.fasb.org/extlink&oid=6516133

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The amount of cash or cash equivalents contributed during the reporting period by the entity to fund its pension plans and its non-pension postretirement benefit plans.

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The amount of cash or cash equivalents contributed by the entity to fund its pension plans.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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The total cash inflow associated with the amount received from holders to acquire the entity's shares under incentive and share awards, including stock option exercises. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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Cash inflow resulting from recoveries, by any means, against the cost of disposing of plant, whether by demolishing, dismantling, abandoning, sale, and so forth during the period.

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The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

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