Commitments and Contingencies (Details) (USD $)	12 Months Ended	3 Months Ended			6 Months Ended
	Dec. 31, 2009	Mar. 31, 2011 Class Action Lawsuit on Behalf of Certain Unionized Retirees [Member]	Dec. 31, 2009 Class Action Lawsuit on Behalf of Certain Unionized Retirees [Member]	Dec. 31, 2010 Commission Arrangement Lawsuit [Member]	Jun. 30, 2011 Fox River Site [Member]	Dec. 31, 2010 Fox River Site [Member]	Jun. 30, 2009 Fox River Site [Member]	Jun. 30, 2011 Total Clean Up Costs, Fox River Site [Member]	Jun. 30, 2011 Total Natrual Resource Damages, Fox River Site [Member]	Jun. 30, 2011 Fox River LLC [Member]	Dec. 31, 2010 Fox River LLC [Member]	Jun. 30, 2011 Kalamazoo River Site [Member]
Loss Contingencies [Line Items]
Loss Contingency Accrual, at Carrying Value			$ 6,000,000	$ 8,000,000
Fox River LLC Funding Remainder Other Current Asset										12,000,000	5,000,000
Litigation Settlement, Gross		3,000,000
Promissory Note, Original Maximum Obligation							20,000,000
Promissory Note, Current Maximum Obligation					16,000,000
Portion Of Costs Below Threshold, Percentage					45.00%
Threshold For Environmental Cleanup Costs					75,000,000
Portion Of Costs Exceeding Threshold, Percentage					40.00%
Number of Defendants												3
Consent Decrees Filed By Government	12				2,000,000
Estimated Total Clean Up Costs					930,000,000
Percentage Contingency for Probable Cost Overruns								15.00%
Estimated Total Clean Up Costs With Additional Overrun Contingency								986,000,000
Estimated Total NRD Costs									76,000,000
Estimated Maximum NRD Costs									246,000,000
Estimated Federal Government Maximum NRD Costs									382,000,000
Loss Contingency, Potential Reserve Increase Amount					17,000,000
Anticipated Allocable Total Site Costs, Maximum					100.00%
Net Loss Contingency Accrual										191,000,000	199,000,000
Estimate of AT&T and Actel-Lucent's Portion of Payout, Recorded As Long Term Asset					85,000,000	86,000,000
Total Amount Received from Settlements with Insurance Carriers					158,000,000
Amounts Expected to be Received from Settlements with Insurance Carriers					4,000,000
Portion of Insurance Settlements Subject to Competing Claims					9,000,000
NCRs Agreed Upon Share of Insurance Settlements Subject to Competing Claims					4,000,000
Judgement Against Insurance Company, Amount Awarded, Pending Appeal					5,000,000
Alleged Portion Of GP Clean Up Costs												79,000,000
Number of Potentially Responsible Parties					8
Additional Potentially Responsible Parties					4
Loss Contingency, Range of Possible Loss, Minimum					$ 0
Number of Insurance Companies Not Settled					1