Restructuring Charges (Narrative) (Details) (USD $)	6 Months Ended
May 31, 2012
2012 Restructuring Activities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring current period expense	$ 8,496,000
Short-term restructuring reserves	6,800,000
Long-term restructuring reserves	200,000
2012 Restructuring Activities [Member] \| Excess Facilities And Other Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring current period expense	1,479,000
Expected restructuring costs	3,500,000
2012 Restructuring Activities [Member] \| Employee Severance And Related Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring current period expense	7,017,000
Expected restructuring costs	16,000,000
2010 Restructuring Activities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring cumulative expenses	44,600,000
Short-term restructuring reserves	3,600,000
Long-term restructuring reserves	500,000
2010 Restructuring Activities [Member] \| Excess Facilities And Other Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring cumulative expenses	9,300,000
2010 Restructuring Activities [Member] \| Employee Severance And Related Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring cumulative expenses	$ 35,300,000

Amount of costs incurred to date for the specified type of restructuring cost.

Amount expected to be charged against earnings in the current and future periods for the specified restructuring cost.

Carrying amount as of the balance sheet date of known and estimated obligations associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid in the next twelve months or in the normal operating cycle if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

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- Definition

Carrying amount as of the balance sheet date of known and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid after one year or beyond the next operating cycle, if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

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