Restructuring, Asset Impairment Charges and Other Items (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Activities affecting the restructuring obligations
Beginning balance	$ 25,856	$ 45,302
Expense	57,318	61,626
Utilized	(60,978)	(81,072)
Ending balance	22,196	25,856
Lease and contract terminations [Member]
Activities affecting the restructuring obligations
Beginning balance	20,905	40,397
Expense	8,303	5,629
Utilized	(17,456)	(25,121)
Ending balance	11,752	20,905
Employees severance and benefits [Member]
Activities affecting the restructuring obligations
Beginning balance	4,951	4,905
Expense	26,754	11,890
Utilized	(21,261)	(11,844)
Ending balance	10,444	4,951
Other exit costs, net [Member]
Activities affecting the restructuring obligations
Beginning balance	0	0
Expense	22,261	44,107
Utilized	(22,261)	(44,107)
Ending balance	$ 0	$ 0