Commitments And Contingencies (Details)	Sep. 29, 2010 USD ($)	Sep. 29, 2010 EUR (€)	Sep. 13, 2006 USD ($)	Sep. 13, 2006 EUR (€)
Commitments And Contingencies
Bankruptcy deficit of KPNQwest	$ 5,700,000,000	€ 4,200,000,000
Plaintiffs alleged damages			$ 300,000,000	€ 219,000,000