Condensed Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Cash Flows from Operating Activities [Abstract]
Net income	$ 773.9	$ 753.2
Adjustments to reconcile net income to net cash provided by operating activities [Abstract]
Depreciation	135.4	135.9
Amortization of intangible assets	75.2	67.7
Amortization of deferred gain from termination of interest rate swaps	(5.5)	(0.9)
Income from equity method investments, net of dividends received	(1.6)	3.8
Remeasurement gain, equity interest in Clemenger Group	0	(123.4)
Provision for doubtful accounts	5.3	4.0
Share-based compensation	63.1	52.7
Excess tax benefit on share-based compensation	(79.8)	(27.4)
Proceeds from discontinuation of interest rate swaps	0	38.8
Change in operating capital	(665.9)	(903.9)
Net Cash Provided By Operating Activities	300.1	0.5
Cash Flows from Investing Activities [Abstract]
Payments to acquire property, plant and equipment	(158.7)	(114.2)
Payments to acquire businesses and interests in affiliates, net of cash acquired	(117.3)	(314.8)
Payments to acquire investments	0	(11.6)
Proceeds from sales of investments	8.4	27.9
Net Cash Used In Investing Activities	(267.6)	(412.7)
Cash Flows from Financing Activities [Abstract]
Proceeds from (repayments of) short-term debt	1.4	(35.7)
Proceeds from borrowings	1,273.2	0.3
Repayments of convertible debt	0	(0.1)
Payments of dividends	(235.4)	(199.0)
Payments for repurchase of common stock	(1,001.6)	(717.9)
Proceeds from stock plans	207.6	104.7
Payments for acquisition of additional noncontrolling interests	(19.2)	(28.0)
Payments of dividends to noncontrolling interests shareholders	(78.9)	(69.8)
Payments of contingent purchase price obligations	(30.6)	(8.9)
Excess tax benefit on share-based compensation	79.8	27.4
Other, net	(86.9)	(17.7)
Net Cash Provided By (Used In) Financing Activities	109.4	(944.7)
Effect of exchange rate changes on cash and cash equivalents	33.2	(31.2)
Net Increase (Decrease) in Cash and Cash Equivalents	175.1	(1,388.1)
Cash and Cash Equivalents at the Beginning of the Period	1,781.2	2,288.7
Cash and Cash Equivalents at the End of the Period	$ 1,956.3	$ 900.6