Income Tax Expense (Reconciliation Of U.S. Federal Statutory Rate To Effective Income Tax Rate) (Details)	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Tax Expense [Abstract]
Federal statutory rate	35.00%	35.00%	35.00%
State taxes, net of federal tax	1.90%	1.40%	1.80%
Foreign operations	(2.00%)	(1.80%)	(0.60%)
Impact of rate changes on deferred taxes	0.00%	(0.10%)	(0.70%)
Research tax credit	(0.70%)	(0.70%)	(0.80%)
Domestic manufacturing tax benefit	(2.40%)	(1.40%)	(2.00%)
Other items and adjustments	0.10%	(0.50%)	(0.50%)
Effective income tax rate	31.90%	31.90%	32.20%

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

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-Section 50

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The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

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The portion of the difference between total income tax expense or benefit as reported in the Income Statement and the expected income tax expense or benefit that is attributable to changes in the income tax laws or rates.

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The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to the deduction for qualified production activities received under enacted tax laws.

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The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate that can be explained by the difference between statutory income tax rates in foreign jurisdictions and the domestic federal statutory income tax rate recorded during the period.

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The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to all other items not otherwise listed in the existing taxonomy.

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The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate that can be explained by the state and local income tax expense or benefit, net of the federal tax benefit (expense) thereon, recorded during the period.

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The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate that can be explained by research tax credits generated or utilized under enacted tax laws during the period.

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