Condensed Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Current Assets [Abstract]
Cash and cash equivalents	$ 1,502.7	$ 1,781.2
Short-term investments, at cost	5.8	23.8
Accounts receivable, net of allowance for doubtful accounts of $40.7 and $40.6	5,932.4	6,632.0
Work in process	708.7	640.3
Other current assets	1,470.9	1,344.2
Total Current Assets	9,620.5	10,421.5
Property, Plant and Equipment, at cost, less accumulated depreciation of $1,201.2 and $1,186.1	687.4	682.9
Investments In Affiliates	185.9	184.2
Goodwill	8,574.5	8,456.3
Intangible Assets, net of accumulated amortization of $441.6 and $416.9	462.8	468.4
Other Assets	292.4	292.1
TOTAL ASSETS	19,823.5	20,505.4
Current Liabilities [Abstract]
Accounts payable	7,230.4	8,060.0
Customer advances	1,289.8	1,225.3
Current portion of debt	0.4	0.7
Short-term borrowings	11.7	9.5
Taxes payable	185.7	237.0
Other current liabilities	2,149.2	2,138.5
Total Current Liabilities	10,867.2	11,671.0
Long-Term Notes Payable	2,521.4	2,523.5
Convertible Debt	659.4	659.4
Long-Term Liabilities	598.6	602.0
Long-Term Deferred Tax Liabilities	896.4	867.6
Commitments and Contingent Liablities (See Note 13)
Temporary Equity - Redeemable Noncontrolling Interests	227.5	202.1
Shareholders' Equity [Abstract]
Preferred stock	0	0
Common stock	59.6	59.6
Additional paid-in capital	1,004.0	1,043.5
Retained earnings	7,844.7	7,724.1
Accumulated other comprehensive income (loss)	(96.2)	(191.7)
Treasury stock, at cost	(5,233.1)	(5,131.2)
Total Shareholders' Equity	3,579.0	3,504.3
Noncontrolling interests	474.0	475.5
Total Equity	4,053.0	3,979.8
TOTAL LIABILITIES AND EQUITY	$ 19,823.5	$ 20,505.4