Condensed Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Cash Flows from Operating Activities [Abstract]
Net income	$ 226.0	$ 217.1
Adjustments to reconcile net income to net cash used in operating activities [Abstract]
Depreciation	45.3	44.5
Amortization of intangible assets	24.0	20.7
Amortization of deferred gain from termination of interest rate swaps	(1.8)	0
Income from equity method investments, net of dividends received	0.6	3.8
Remeasurement gain, equity interest in Clemenger Group	0	(123.4)
Provision for doubtful accounts	1.5	0.9
Share-based compensation	26.3	16.4
Excess tax benefit on share-based compensation	(11.4)	(4.3)
Change in operating capital	(311.0)	(352.6)
Net Cash Used In Operating Activities	(0.5)	(176.9)
Cash Flows from Investing Activities [Abstract]
Payments to acquire property, plant and equipment	(45.6)	(39.1)
Payments to acquire businesses and interests in affiliates, net of cash acquired	(30.4)	(211.4)
Proceeds from sales of investments	18.8	11.1
Net Cash Used In Investing Activities	(57.2)	(239.4)
Cash Flows from Financing Activities [Abstract]
Proceeds from short-term debt	1.9	9.7
Payments of dividends	(69.8)	(57.9)
Payments for repurchase of common stock	(254.7)	(333.2)
Proceeds from stock plans	90.4	27.4
Payments for acquisition of additional noncontrolling interests	(1.3)	(12.6)
Payments of dividends to noncontrolling interests shareholders	(23.0)	(24.9)
Excess tax benefit on share-based compensation	11.4	4.3
Other, net	(7.2)	(2.8)
Net Cash Used In Financing Activities	(252.3)	(390.0)
Effect of exchange rate changes on cash and cash equivalents	31.5	29.8
Net Decrease in Cash and Cash Equivalents	(278.5)	(776.5)
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	$ 1,502.7	$ 1,512.2