Acquisitions and Divestitures (Divestitures) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Income Statement reclassified results of discontinued operations
Loss from discontinued operations, net of tax	$ 0	$ 0	$ 0	$ (1)
Assets and liabilities reclassified as held for sale
Accounts receivable, net	1,102	1,002	1,102	1,002	1,045
Other liabilities	378	433	378	433	422
Broadcasting Group [Member]
Income Statement reclassified results of discontinued operations
Revenue		23		44
Costs and expenses		22		44
Loss before taxes on income		1		0
Provision for taxes on income		(1)		(1)
Loss from discontinued operations, net of tax		0		(1)
Assets and liabilities reclassified as held for sale
Accounts receivable, net		19		19
Property and equipment, net		25		25
Other intangible assets, net		46		46
Other assets		8		8
Assets held for sale		98		98
Accounts payable and accrued expenses		7		7
Other liabilities		5		5
Liabilities held for sale		$ 12		$ 12