Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Current Asstes [Abstract]
Cash and cash equivalents	$ 1,781.2	$ 2,288.7
Short-term investments, at cost	23.8	11.3
Accounts receivable, net of allowance for doubtful accounts of $41.1 and $46.7	6,632.0	5,977.2
Work in process	640.3	707.6
Other current assets	1,344.2	1,209.3
Total Current Assets	10,421.5	10,194.1
Property, Plant and Equipment, at cost, less accumulated depreciation of $1,186.1 and $1,168.3	682.9	653.3
Investments In Affiliates	184.2	299.1
Goodwill	8,456.3	7,809.1
Intangible Assets, net of accumulated amortization of $416.9 and $354.8	468.4	278.2
Deferred Tax Assets	0	14.2
Other Assets	292.1	318.1
TOTAL ASSETS	20,505.4	19,566.1
Current Liabilities [Abstract]
Accounts payable	8,060.0	7,726.9
Customer advances	1,225.3	1,187.1
Current portion of debt	0.7	1.4
Short-term borrowings	9.5	50.2
Taxes payable	237.0	176.3
Other current liabilities	2,138.5	1,881.2
Total Current Liabilities	11,671.0	11,023.1
Long-Term Notes Payable	2,523.5	2,465.1
Convertible Debt	659.4	659.5
Long-Term Liabilities	602.0	576.5
Long-Term Deferred Tax Liabilities	867.6	747.7
Commitments and Contingent Liablities (See Note 18)
Temporary Equity - Redeemable Noncontrolling Interests	202.1	201.1
Shareholders' Equity [Abstract]
Preferred stock, $1.00 par value, 7.5 million shares authorized, none issued	0	0
Common stock, $0.15 par value, 1.0 billion shares authorized, 397.2 million shares issued, 273.4 million and 285.5 million shares outstanding	59.6	59.6
Additional paid-in capital	1,043.5	1,271.9
Retained earnings	7,724.1	7,052.5
Accumulated other comprehensive income (loss)	(191.7)	(106.4)
Treasury stock, at cost, 123.8 million and 111.7 million shares	(5,131.2)	(4,697.1)
Total Shareholders' Equity	3,504.3	3,580.5
Noncontrolling interests	475.5	312.6
Total Equity	3,979.8	3,893.1
TOTAL LIABILITIES AND EQUITY	$ 20,505.4	$ 19,566.1