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Supplemental Disclosures To The Consolidated Statements Of Cash Flows (Narrative) (Details) (USD $) In Millions	9 Months Ended		0 Months Ended	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Aug. 03, 2010 Kroll Divestiture [Member]	Sep. 30, 2010 KLS [Member]
Non-cash issuance of common stock	$ 191	$ 173
Stock-based compensation expense, equity awards	124	130
Cash from disposal, disposition, and/or sale transaction			$ 1,130	$ 110

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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