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Inventories (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Inventories
Finished goods	$ 163.9	$ 125.1
Work in process	179.5	104.4
Raw material and purchased parts	271.5	248.3
Total FIFO cost	614.9	477.8
Excess of FIFO cost over LIFO inventory value	(23.0)	(22.4)
Total inventories	591.9	455.4
Domestic inventories, valued using the last-in, first-out ("LIFO") method, as a percentage of total inventory	15.00%	14.00%
Progress payments, which are netted against work in process	3.7	5.9
Amount of operating income increased	$ 1.2	$ 4.0

X

- Definition

Represents the increase in operating income as a result of LIFO liquidation.

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X

- Definition

Represents progress payments that are offset against work in process.

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X

- Definition

The amount of FIFO (first in first out) inventory present at the reporting date when inventory is also valued using different valuation methods.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 43

-Chapter 3

-Section A

-Paragraph 9

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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X

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X

- Definition

Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of merchandise or goods held by the company that are readily available for sale.

+ References

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-Publisher FASB

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-Section S99

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-Name Regulation S-X (SX)

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-Section 02

-Paragraph 6

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-URI http://asc.fasb.org/extlink&oid=6386940&loc=d3e100047-122729

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X

- Definition

Reflects the difference between (a) inventory at the lower of LIFO cost or market and (b) inventory at replacement cost or at the lower of some acceptable inventory accounting method (such as FIFO or average cost), or market. If material, reflects an excess of replacement or current cost over stated LIFO value parenthetically on the balance sheet or in a note to the financial statements.

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-Number 210

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X

- Definition

Carrying amount (lower of cost or market) as of the balance sheet date of inventories less all valuation and other allowances. Excludes noncurrent inventory balances (expected to remain on hand past one year or one operating cycle, if longer).

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X

- Definition

Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of items purchased for use as components of a finished product or pieces of machinery and equipment plus any items in their natural and unrefined state. This element may be used when the reporting entity combines raw materials and purchased parts into an aggregate amount.

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- Definition

Carrying amount, net of reserves and adjustments, as of the balance sheet date of merchandise or goods which are partially completed. This inventory is generally comprised of raw materials, labor and factory overhead costs, which require further materials, labor and overhead to be converted into finished goods, and which generally require the use of estimates to determine percentage complete and pricing.

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X

- Definition

The percentage of LIFO (last in first out) inventory to total inventory as of the balance sheet date if other than 100 percent.

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