CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOW (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Cash flow from operating activities:
Net income	$ 417,941	$ 413,837
Adjustments for cash from operating activities:
Depreciation and amortization	89,339	88,197
Stock-based compensation expense	23,167	21,011
Non-cash casualty loss related to flood		12,400
Change in contingent acquisition related obligations		(17,813)
Excess tax benefits from stock-based compensation payment arrangements	(17,805)	(5,624)
Net change in components of working capital	(44,789)	(125,644)
Net change in other long-term assets and liabilities	(250)	10,225
Cash flow provided by operating activities	467,603	396,589
Cash flow from investing activities:
Additions to property, plant and equipment	(96,489)	(72,048)
Proceeds from disposals of fixed assets	4,174	7,134
Purchases of short-term investments	(220,330)	(93,833)
Sales and maturities of short-term investments	186,833	101,444
Acquisitions, net of cash acquired	(179,597)	(52,993)
Cash flow used in investing activities	(305,409)	(110,296)
Cash flow from financing activities:
Issuance of senior notes	498,730
Borrowings under credit facilities	606,600	675,100
Repayments under credit facilities	(876,960)	(215,598)
Payments of fees and expenses related to debt financing	(4,318)	(2,125)
Proceeds from exercise of stock options	73,450	24,255
Excess tax benefits from stock-based compensation payment arrangements	17,805	5,624
Payment of contingent acquisition related obligations		(40,000)
Payments to shareholders of noncontrolling interests	(4,713)	(28,689)
Purchase and retirement of treasury stock	(229,442)	(534,000)
Dividend payments	(36,385)	(7,788)
Cash flow provided by (used in) financing activities	44,767	(123,221)
Effect of exchange rate changes on cash and cash equivalents	3,499	1,219
Net change in cash and cash equivalents	210,460	164,291
Cash and cash equivalents balance, beginning of period	515,086	525,888
Cash and cash equivalents balance, end of period	725,546	690,179
Cash paid for:
Interest	31,791	23,035
Income taxes	$ 134,479	$ 112,845