Commitments and Contingencies (Details)	6 Months Ended
	Jun. 30, 2011 USD ($)	Sep. 29, 2010 USD ($)	Sep. 29, 2010 EUR (€)	Sep. 13, 2006 USD ($)	Sep. 13, 2006 EUR (€)
Commitments and Contingencies
Bankruptcy deficit of KPNQwest		$ 6,100,000,000	€ 4,200,000,000
Plaintiffs alleged damages				320,000,000	219,000,000
Retirees life insurance benefit	$ 10,000