Discontinued Operations (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pre-tax gain on sale of business	$ (7,000,000)	$ 474,000,000
Wireless Broadband [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pre-tax gain on sale of business		40,000,000
Sale Of NSN [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pre-tax gain on sale of business		434,000,000
Net proceeds received from sale of business		1,000,000,000
Purchase price adjustment resulting from discontinued operations		$ 120,000,000