Business Combinations (Summary Of Fair Values Of Assets Acquired And Liabilities) (Details) (The Katz Group [Member], USD $) In Millions, unless otherwise specified	Mar. 25, 2012
Business Acquisition [Line Items]
Goodwill	$ 506
Amounts Previously Recognized As Of Acquisition Date (Provisional) [Member]
Business Acquisition [Line Items]
Current assets, net of cash acquired	33
Goodwill	506
Intangible assets	441
Other long-term assets	15
Current liabilities	(37)
Long-term deferred tax liabilities	(39)
Net assets acquired, less cash and cash equivalents	$ 919