Other Financial Data (Investments) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Schedule of Investments [Line Items]
Recorded Value	$ 123	$ 119
Unrealized Losses	(1)
Cost Basis	124	119
Common Stock And Equivalents [Member]
Schedule of Investments [Line Items]
Recorded Value	4
Unrealized Losses	(1)
Cost Basis	5
Other Securities, At Cost [Member]
Schedule of Investments [Line Items]
Recorded Value	90	90
Cost Basis	90	90
Equity Method Investments [Member]
Schedule of Investments [Line Items]
Recorded Value	29	29
Cost Basis	$ 29	$ 29

For an unclassified balance sheet, this item represents investments in debt and equity securities which are categorized neither as held-to-maturity nor trading.

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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+ Details

- Definition

This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

+ References+ Details

Motorola Mobility Holdings, Inc 10-Q