Subsequent Events (Details) (USD $)	0 Months Ended
	Jan. 28, 2015	Dec. 26, 2014	Feb. 10, 2015
Subsequent Event [Line Items]
Proceeds from Escrow Deposit		$ 25,000,000
Subsequent Event | Repurchase Agreement 2015
Subsequent Event [Line Items]
Stock Repurchase Program, Authorized Amount			75,000,000
Subsequent Event | Affiliated Entity
Subsequent Event [Line Items]
Proceeds from Escrow Deposit	875,000,000
Subsequent Event | Subsidiaries
Subsequent Event [Line Items]
Number of Companies Involved in Syndicate	30
Increase (Decrease) in Intangible Assets, Current	$ 29,000,000
Subsequent Event | Subsidiaries | Patents
Subsequent Event [Line Items]
Patent assets, useful life	60 months