10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2011

OR

¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from             to             

Commission file number 000-30713

Intuitive Surgical, Inc.

(Exact name of Registrant as specified in its Charter)

Delaware	77-0416458
(State or Other Jurisdiction of Incorporation or Organization)	(I.R.S. Employer Identification Number)

1266 Kifer Road

Sunnyvale, California 94086

(Address of Principal Executive Offices) (Zip Code)

(408) 523-2100

(Registrant's Telephone Number, Including Area Code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15 (d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    YES  x    NO  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    YES  x    NO  ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See definition of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer	x	Accelerated filer	¨
Non-accelerated filer	¨  (Do not check if a smaller reporting company)	Smaller reporting company	¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    YES  ¨    NO  x

The Registrant had 38,994,233 shares of Common Stock, $0.001 par value per share, outstanding as of October 13, 2011.

INTUITIVE SURGICAL, INC.

TABLE OF CONTENTS

		Page No.
PART I. FINANCIAL INFORMATION
Item 1.	Financial Statements (Unaudited):
	Condensed consolidated balance sheets as of September 30, 2011 and December 31, 2010		3
	Condensed consolidated statements of income for the three- and nine-month periods ended September  30, 2011 and September 30, 2010		4
	Condensed consolidated statements of cash flows for the nine-month periods ended September  30, 2011 and September 30, 2010		5
	Notes to condensed consolidated financial statements (unaudited)		6
Item 2.	Management's Discussion and Analysis of Financial Condition and Results of Operations		16
Item 3.	Quantitative and Qualitative Disclosures About Market Risk		28
Item 4.	Controls and Procedures		28
PART II. OTHER INFORMATION
Item 1.	Legal Proceedings		28
Item 1A.	Risk Factors		29
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds		30
Item 3.	Defaults Upon Senior Securities		30
Item 5.	Other Information		30
Item 6.	Exhibits		31
	Signature		32

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PART I — FINANCIAL INFORMATION

Item 1. Financial Statements

INTUITIVE SURGICAL, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(IN MILLIONS, EXCEPT PAR VALUE)

(UNAUDITED)

	September 30, 2011		December 31, 2010
ASSETS
Current assets:
Cash and cash equivalents	$	298.2	$	279.8
Short-term investments		612.4		630.6
Accounts receivable, net		265.1		246.8
Inventory		108.6		86.8
Prepaids and other assets		22.8		23.3
Deferred tax assets		4.8		8.5
Total current assets		1,311.9		1,275.8
Property, plant and equipment, net		196.0		159.8
Long-term investments		976.7		698.5
Long-term deferred tax assets		69.1		73.3
Intangible and other assets, net		75.4		66.1
Goodwill		116.9		116.9
Total assets	$	2,746.0	$	2,390.4
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Accounts payable	$	43.2	$	35.6
Accrued compensation and employee benefits		60.3		63.4
Deferred revenue		143.7		126.1
Other accrued liabilities		36.9		48.7
Total current liabilities		284.1		273.8
Long-term liabilities		92.9		79.2
Total liabilities		377.0		353.0
Commitments and contingencies
Stockholders’ equity:
Preferred stock, 2.5 shares authorized, $0.001 par value, issuable in series; no shares issued and outstanding as of September 30, 2011 and December 31, 2010		—		—
Common stock, 100.0 shares authorized, $0.001 par value, 39.0 and 38.9 shares issued and outstanding as of September 30, 2011 and December 31, 2010, respectively		—		—
Additional paid-in capital		1,616.8		1,316.9
Retained earnings		750.7		718.9
Accumulated other comprehensive income		1.5		1.6
Total stockholders’ equity		2,369.0		2,037.4
Total liabilities and stockholders’ equity	$	2,746.0	$	2,390.4

See accompanying Notes to Condensed Consolidated Financial Statements (unaudited).

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INTUITIVE SURGICAL, INC.

CONDENSED CONSOLIDATED STATEMENTS OF INCOME

(IN MILLIONS, EXCEPT PER SHARE AMOUNTS)

(UNAUDITED)

	Three Months Ended September 30,				Nine Months Ended September 30,
	2011		2010		2011		2010
Revenue:
Product	$	374.9	$	287.1	$	1,057.5	$	860.4
Service		71.8		57.3		203.0		163.3
Total revenue		446.7		344.4		1,260.5		1,023.7
Cost of revenue:
Product		96.2		72.8		274.5		213.5
Service		25.0		21.0		75.1		62.3
Total cost of revenue		121.2		93.8		349.6		275.8
Gross profit		325.5		250.6		910.9		747.9
Operating expenses:
Selling, general, and administrative		111.2		91.6		316.8		263.0
Research and development		35.4		26.9		98.8		83.4
Total operating expenses		146.6		118.5		415.6		346.4
Income from operations		178.9		132.1		495.3		401.5
Interest and other income, net		1.9		5.0		11.3		13.6
Income before taxes		180.8		137.1		506.6		415.1
Income tax expense		58.4		50.5		162.7		154.5
Net income	$	122.4	$	86.6	$	343.9	$	260.6
Earnings per share:
Basic	$	3.13	$	2.20	$	8.77	$	6.65
Diluted	$	3.05	$	2.14	$	8.55	$	6.45
Shares used in computing earnings per share:
Basic		39.1		39.4		39.2		39.2
Diluted		40.1		40.5		40.2		40.4

See accompanying Notes to Condensed Consolidated Financial Statements (unaudited).

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INTUITIVE SURGICAL, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(IN MILLIONS)

(UNAUDITED)

	Nine Months  Ended September 30,
	2011			2010
Operating Activities:
Net income	$	343.9		$	260.6
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation		20.9			17.4
Amortization of intangible assets		13.1			12.2
Deferred income taxes		8.2			(11.8	)
Income tax benefits from employee stock option plans		36.2			49.5
Excess tax benefit from stock-based compensation		(44.9	)		(56.3	)
Share-based compensation expense		101.8			87.5
Changes in operating assets and liabilities:
Accounts receivable		(18.2	)		(2.4	)
Inventory		(21.8	)		(27.4	)
Prepaids and other assets		(7.6	)		(0.3	)
Accounts payable		7.5			8.2
Deferred revenue		17.7			17.2
Other accrued liabilities		(8.9	)		49.7
Net cash provided by operating activities		447.9			404.1
Investing Activities:
Purchase of investments		(1,176.0	)		(1,032.2	)
Proceeds from sales and maturities of investments		919.1			745.4
Purchase of property and equipment and acquisition of intellectual property		(67.7	)		(86.6	)
Net cash used in investing activities		(324.6	)		(373.4	)
Financing Activities:
Proceeds from issuance of common stock, net		181.6			132.9
Excess tax benefit from stock-based compensation		44.9			56.3
Repurchase and retirement of common stock		(331.8	)		(58.9	)
Net cash provided by (used in) financing activities		(105.3	)		130.3
Effect of exchange rate changes on cash and cash equivalents		0.4			(0.4	)
Net increase in cash and cash equivalents		18.4			160.6
Cash and cash equivalents, beginning of period		279.8			221.4
Cash and cash equivalents, end of period	$	298.2		$	382.0

See accompanying Notes to Condensed Consolidated Financial Statements (unaudited).

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INTUITIVE SURGICAL, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(UNAUDITED)

In this report, “Intuitive Surgical,” “Intuitive”, and the “Company” refer to Intuitive Surgical, Inc and its wholly-owned subsidiaries.

NOTE 1. DESCRIPTION OF BUSINESS

Intuitive Surgical, Inc. designs, manufactures, and markets the da Vinci Surgical System, which is an advanced surgical system that the Company believes represents a new generation of surgery. The da Vinci Surgical System consists of a surgeon’s console or consoles, a patient-side cart, a high performance vision system and proprietary “wristed” instruments. The da Vinci Surgical System translates the surgeon’s natural hand movements on instrument controls at the console into corresponding micro-movements of instruments positioned inside the patient through small puncture incisions, or ports. The Company markets its products through sales representatives in the United States, and through a combination of sales representatives and distributors in its international markets.

NOTE 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Basis of Presentation

In the opinion of management, the accompanying unaudited Condensed Consolidated Financial Statements (“financial statements”) of Intuitive Surgical, Inc. and its wholly-owned subsidiaries have been prepared on a consistent basis with the December 31, 2010 audited Consolidated Financial Statements and include all adjustments, consisting of only normal recurring adjustments, necessary to fairly state the information set forth herein. These financial statements have been prepared in accordance with the rules and regulations of the Securities and Exchange Commission (“SEC”), and, therefore, omit certain information and footnote disclosure necessary to present the statements in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”). These financial statements should be read in conjunction with the audited Consolidated Financial Statements and Notes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2010, which was filed on February 1, 2011. The results of operations for the first nine months of fiscal 2011 are not indicative of the results to be expected for the entire fiscal year or any future periods.

New Accounting Standards Recently Adopted

No new accounting standards have been adopted since the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2010 was filed.

Recent Accounting Pronouncements

In June 2011, the Financial Accounting Standard Board (“FASB”) issued new accounting guidance related to the presentation of comprehensive income that increases comparability between U.S. GAAP and International Financial Reporting Standard. This guidance eliminates the current option to report other comprehensive income (OCI) and its components in the statement of changes in stockholders’ equity. This guidance is effective for the Company’s interim and annual periods beginning January 1, 2012. The Company intends to adopt this guidance during the first quarter of 2012 and will report OCI in a separate statement.

In September 2011, the FASB issued new accounting guidance intended to simplify goodwill impairment testing. Entities will be allowed to perform a qualitative assessment on goodwill impairment to determine whether a quantitative assessment is necessary. This guidance is effective for the Company’s interim and annual periods beginning January 1, 2012. The Company does not believe the adoption of this guidance will have a material impact on its consolidated financial statements.

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NOTE 3. CASH, CASH EQUIVALENTS AND INVESTMENTS

The following tables summarize the Company’s cash, cash equivalents and investments as of September 30, 2011 and December 31, 2010 (in millions):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
September 30, 2011
Cash and cash equivalents:
Cash	$	70.0	$	—	$	—		$	70.0
Cash equivalents		228.2		—		—			228.2
Total cash and cash equivalents	$	298.2	$	—	$	—		$	298.2
Available-for-sale investments:
Short-term
Commercial paper	$	94.2	$	—	$	—		$	94.2
Municipal notes		96.4		0.2		—			96.6
U.S. corporate debt & equity securities		164.7		0.6		(0.1	)		165.2
U.S. treasuries		116.7		0.1		—			116.8
U.S. government agencies		138.9		0.2		—			139.1
Non-U.S. government securities		0.5		—		—			0.5
Total short-term	$	611.4	$	1.1	$	(0.1	)	$	612.4
Long-term
Municipal notes	$	187.1	$	1.0	$	(3.9	)	$	184.2
U.S. corporate debt		415.3		2.4		(1.3	)		416.4
U.S. treasuries		31.8		0.1		—			31.9
U.S. government agencies		302.7		1.4		(0.1	)		304.0
Non-U.S. government securities		39.8		0.4		—			40.2
Total long-term	$	976.7	$	5.3	$	(5.3	)	$	976.7
Total cash, cash equivalents and available-for-sale investments:	$	1,886.3	$	6.4	$	(5.4	)	$	1,887.3

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			Gross		Gross
	Amortized		Unrealized		Unrealized			Fair
December 31, 2010	Cost		Gains		Losses			Value
Cash and cash equivalents:
Cash	$	20.1	$	—	$	—		$	20.1
Cash equivalents		259.7		—		—			259.7
Total cash and cash equivalents	$	279.8	$	—	$	—		$	279.8
Available-for-sale investments:
Short-term
Commercial paper	$	79.0	$	—	$	—		$	79.0
Municipal notes		111.8		0.4		—			112.2
U.S. corporate debt		174.1		1.3		—			175.4
U.S. treasuries		76.3		—		—			76.3
U.S. government agencies		187.4		0.3		—			187.7
Total short-term	$	628.6	$	2.0	$	—		$	630.6
Long-term
Municipal notes	$	143.4	$	0.3	$	(4.3	)	$	139.4
U.S. corporate debt		300.4		1.8		(0.9	)		301.3
U.S. treasuries		39.9		0.1		—			40.0
U.S. government agencies		196.7		0.3		(0.4	)		196.6
Non-U.S. government securities		21.2		0.1		(0.1	)		21.2
Total long-term	$	701.6	$	2.6	$	(5.7	)	$	698.5
Total cash, cash equivalents and available-for-sale investments	$	1,610.0	$	4.6	$	(5.7	)	$	1,608.9

The following table summarizes the maturities of the Company’s cash equivalents and available-for-sale investments, excluding equity securities, at September 30, 2011 (in millions):

	Amortized Cost		Fair Value
Mature in less than one year	$	839.1	$	839.8
Mature in one to five years		954.2		958.0
Mature in more than five years		22.5		18.7
Total	$	1,815.8	$	1,816.5

During the nine months ended September 30, 2011, realized gains on the sale of investments were approximately $2.5 million. Realized gains or losses recognized on the sale of investments for the three months ended September 30, 2011 and three and nine months ended September 30, 2010 were not significant. As of September 30, 2011 and December 31, 2010, net unrealized gains on investments, net of tax, of $0.9 million and $1.3 million, respectively, were included in accumulated other comprehensive income in the accompanying unaudited Condensed Consolidated Balance Sheets. At September 30, 2011, the Company evaluated its gross unrealized losses, the majority of which were from auction-rate securities (ARS). The Company determined these unrealized losses to be temporary, because the Company does not intend to sell the security and it is not more likely than not that the Company will be required to sell these securities before the recovery of their amortized cost basis.

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NOTE 4. FAIR VALUE MEASUREMENTS

The Company measures certain financial assets , including cash equivalents, available-for-sale securities and foreign currency derivatives at their fair value. The fair value of these financial assets was determined based on three levels of inputs, of which the first two are considered observable and the last unobservable, as follows:

Level 1—Quoted prices in active markets for identical assets or liabilities.

Level 2—Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.

Level 3—Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

The following tables represent the Company’s fair value hierarchy for its financial assets and liabilities as of September 30, 2011 and December 31, 2010 (in millions):

	Fair Value Measurements at September 30, 2011 Using
Assets	Level 1		Level 2		Level 3		Total
Available-for-sale securities
Money Market funds	$	217.8	$	—	$	—	$	217.8
U.S. treasuries		148.8		—		—		148.8
Commercial paper		—		100.6		—		100.6
Corporate debt & equity securities		0.8		580.8		—		581.6
U.S. government agencies		—		447.0		—		447.0
Non-U.S. government agencies		—		40.7		—		40.7
Municipal notes		—		262.1		18.7		280.8
Total available-for-sale securities		367.4		1,431.2		18.7		1,817.3
Foreign Currency Derivatives		—		1.6		—		1.6
Total assets measured at fair value	$	367.4	$	1,432.8	$	18.7	$	1,818.9

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	Fair Value Measurements at December 31, 2010 Using
Assets	Level 1		Level 2		Level 3		Total
Available-for-sale securities
Money Market funds	$	211.2	$	—	$	—	$	211.2
U.S. treasuries		116.3		—		—		116.3
Commercial paper		—		122.5		—		122.5
Corporate debt		—		476.8		—		476.8
U.S. government agencies		—		389.2		—		389.2
Non-U.S. government securities		—		21.1		—		21.1
Municipal notes		—		233.1		18.6		251.7
Total available-for-sale securities		327.5		1,242.7		18.6		1,588.8
Foreign Currency Derivatives		—		0.2		—		0.2
Total assets measured at fair value	$	327.5	$	1,242.9	$	18.6	$	1,589.0
Liabilities
Foreign Currency Derivatives	$	—	$	2.1	$	—	$	2.1
Total liabilities measured at fair value	$	—	$	2.1	$	—	$	2.1

Level 2 securities are priced using quoted market prices for similar instruments, nonbinding market prices that are corroborated by observable market data, or discounted cash flow techniques. The Company’s derivative instruments are primarily classified as Level 2 as they are not actively traded and are valued using pricing models that use observable market inputs. There have been no transfers between Level 1 and Level 2 measurements during the three and nine months ended September 30, 2011. Level 3 assets consist of municipal bonds with an auction reset feature (ARS) whose underlying assets are student loans which are substantially backed by the federal government. Since the auctions for these securities have continued to fail since February 2008, these investments are not currently trading and therefore do not have a readily determinable market value. The Company has valued the ARS using a discounted cash flow model based on Level 3 assumptions, including estimates of, based on data available as of September 30, 2011, interest rates, timing and amount of cash flows, credit and liquidity premiums and expected holding periods of the ARS.

Foreign currency derivative

Cash Flow Hedges

The Company enters into currency forward contracts as cash flow hedges to hedge certain forecasted revenue transactions denominated in currencies other than the U.S. dollar, primarily the Euro and GBP.

As of September 30, 2011 and December 31, 2010, the Company had notional amounts of €6.6 million and €21.0 million, respectively, of outstanding currency forward contracts that were entered into to hedge Euro dominated sales. The net gains (losses) reclassified to revenue related to hedged revenue transactions for the three and nine months ended September 30, 2011 and 2010 were not significant.

Other Derivatives Not Designated as Hedging Instruments

Other derivatives not designated as hedging instruments consist primarily of forward contracts that the Company uses to hedge intercompany balances and other monetary assets or liabilities denominated in currencies other than the U.S. dollar, primarily the Euro, the GBP and the Swiss Franc.

As of September 30, 2011, the Company had notional amounts of €23.9 million, £1.8 million and CHF 1.7 million outstanding currency forward contracts that were entered into to hedge non-functional currency denominated net monetary assets and liabilities, compared to €26.0 million and £2.2 million at December 31, 2010. For the three months ended September 30, 2011 and 2010, the Company had recognized gains (losses) of approximately $0.8 million and $(2.3) million, respectively, in interest and other income, net, related to

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derivative instruments used to hedge against balance sheet foreign currency exposures. These were offset by net foreign exchange gains (losses) of approximately $(1.7) million and $2.9 million during the three months ended September 30, 2011 and 2010, respectively, primarily related to the re-measurement of non-functional currency denominated net monetary assets. For the nine months ended September 30, 2011 and 2010, the Company had recognized gains (losses) of approximately $(2.4) million and $2.5 million, respectively, in interest and other income, net, related to derivative instruments used to hedge against balance sheet foreign currency exposures. These were offset by net foreign exchange gains (losses) of approximately $1.5 million and $(1.9) million during the nine months ended September 30, 2011 and 2010, respectively, primarily related to the re-measurement of non-functional currency denominated net monetary assets.

NOTE 5. BALANCE SHEET DETAILS

Inventory (in millions):

	September 30, 2011		December 31, 2010
Inventory
Raw materials	$	29.8	$	25.6
Work-in-process		3.0		2.5
Finished goods		75.8		58.7
Total	$	108.6	$	86.8

Property, plant and equipment, net (in millions):

During the nine month period ended September 30, 2011, the Company purchased land and buildings in Sunnyvale, California for approximately $33.1 million.

NOTE 6. CONTINGENCIES

On August 6, 2010, a purported class action lawsuit entitled Perlmutter v. Intuitive Surgical et al., No. CV10-3451, was filed against the Company and seven of the Company’s current and former officers and directors in the United States District Court for the Northern District of California. The lawsuit seeks unspecified damages on behalf of a putative class of persons who purchased or otherwise acquired the Company’s common stock between February 1, 2008 and January 7, 2009. The complaint alleges that the defendants violated federal securities laws by making allegedly false and misleading statements and omitting certain material facts in the Company’s filings with the Securities and Exchange Commission. On February 15, 2011, the Police Retirement System of St. Louis was appointed Lead Plaintiff in the case pursuant to the Private Securities Litigation Reform Act of 1995. An amended complaint was filed on April 15, 2011, making allegations substantially similar to the allegations described above. On May 23, 2011 the Company filed a motion to dismiss the amended complaint. On August 10, 2011 that motion was granted and the action was dismissed; the plaintiffs were given 30 days to file an amended complaint. On September 12, 2011, plaintiffs filed their amended complaint. The allegations contained therein are substantially similar to the allegations in the prior complaint. The Company filed a motion to dismiss the amended complaint. A hearing on that motion will not occur until January 2012.

On August 19, 2010, an alleged stockholder caused a purported stockholder’s derivative lawsuit entitled Himmel v. Smith et al., No. 1-10-CV-180416, to be filed in the Superior Court of California for the County of Santa Clara naming the Company as a nominal defendant, and naming 14 of the Company’s current and former officers and directors as defendants. The lawsuit seeks to recover, for the Company’s benefit, unspecified damages purportedly sustained by the Company in connection with allegedly misleading statements and/or omissions made in connection with the Company’s financial reporting for the period between February 1, 2008 and January 7, 2009. It also seeks a series of changes to the Company’s corporate governance policies and an award of attorneys’ fees. On September 15, 2010, another purported stockholder filed an essentially identical lawsuit entitled Applbaum v. Guthart et al., No. 1-10-CV-182645, in the same court against 15 of the Company’s current and former officers and directors. On October 5, 2010 the court ordered that the two cases be consolidated for all purposes. By agreement with the plaintiffs, formal discovery has been stayed in the case.

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Due to the uncertainty surrounding the litigation process, the Company is unable to reasonably estimate the ultimate outcome of the above cases at this time, and therefore no amounts have been accrued related to the outcome of the cases above. Based on currently available information, the Company believes that it has meritorious defenses to the above actions and that the resolution of these cases is not likely to have a material adverse effect on the Company’s business, financial position or future results of operations.

The Company is also a party to various other legal actions that arose in the ordinary course of its business. The Company does not believe that any of these other legal actions will have a material adverse impact on its business, financial position or results of operations.

NOTE 7. STOCKHOLDERS’ EQUITY

Stock Repurchase Program

On February 3, 2011, the Company’s Board of Directors (the “Board”) increased its authorization for stock repurchases to $400 million. The following table provides the stock repurchase activities during the three and nine months ended September 30, 2011 and 2010 (in millions, except per share amounts):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2011		2010		2011		2010
Shares repurchased		0.5		0.2		1.0		0.2
Average price per share	$	344.36	$	277.92	$	344.72	$	277.92
Value of shares repurchased	$	181.1	$	58.9	$	331.8	$	58.9

As of September 30, 2011, the remaining authorized amount of stock repurchases under the Board-authorized stock repurchase program was approximately $68.2 million.

Comprehensive Income

The components of comprehensive income, net of tax, are as follows (in millions):

	Three Months  Ended September 30,						Nine Months  Ended September 30,
	2011			2010			2011			2010
Net income	$	122.4		$	86.6		$	343.9		$	260.6
Foreign currency translation gains (losses)		(0.3	)		0.4			—			(0.2	)
Unrealized gains (losses) on derivative instruments, net of tax:
Unrealized gains (losses) on derivative instruments		1.6			(2.5	)		(0.1	)		0.6
Reclassification adjustment for (gains) losses on derivative instruments recognized during the period		(1.2	)		0.9			0.4			(2.2	)
Unrealized gains (losses) on available-for-sale securities, net of tax		(1.2	)		1.2			(0.4	)		1.2
Total other comprehensive income	$	121.3		$	86.6		$	343.8		$	260.0

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The components of accumulated other comprehensive income are as follows (in millions):

	September 30, 2011		December 31, 2010
Foreign currency translation gains	$	0.1	$	0.1
Accumulated net unrealized gains on derivatives, net of tax		0.5		0.2
Accumulated net unrealized gains on available-for-sale securities, net of tax		0.9		1.3
Total accumulated other comprehensive income	$	1.5	$	1.6

NOTE 8. STOCK-BASED COMPENSATION

Stock Option Plans

2010 Incentive Award Plan

In April 2011, the Company’s stockholders approved the amended and restated 2010 Incentive Award Plan (“2010 Plan”) to provide for an increase in the number of shares of common stock authorized for issuance pursuant to awards granted under the 2010 Plan from 1,250,000 to 2,450,000.

2009 Employment Commencement Incentive Plan

In July 2011, the Board amended and restated the 2009 Employment Commencement Incentive Plan (“2009 Plan”) to provide for an increase in the number of shares of common stock authorized for issuance pursuant to awards granted under the 2009 Plan from 350,000 to 530,000.

A summary of stock option activity under all stock plans for the nine months ended September 30, 2011 is presented as follows (in millions, except per share amounts):

				Stock Options Outstanding
	Shares Available for Grant			Number Outstanding			Weighted Average Exercise Price Per Share
Balance at December 31, 2010		1.4			4.8		$	209.03
Options authorized		1.4
Options granted		(1.3	)		1.3			341.55
Options exercised					(1.0	)		167.32
Options forfeited/expired		0.1			(0.1	)		280.24
Balance at September 30, 2011		1.6			5.0		$	249.57

As of September 30, 2011, 2.5 million shares of options were exercisable at a weighted-average price of $207.31 per share.

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Employee Stock Purchase Plan

Under the Employee Stock Purchase Plan (“ESPP”), employees purchased less than 0.1 million shares for $8.1 million and 0.1 million shares for $6.6 million during the three months ended September 30, 2011 and 2010, respectively and 0.1 million shares for $18.5 million and 0.1 million shares for $14.3 million during the nine months ended September 30, 2011 and 2010, respectively.

Stock-based Compensation

The following table summarizes stock-based compensation charges (in millions):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2011		2010		2011		2010
Cost of sales—products	$	3.2	$	2.5	$	9.2	$	7.0
Cost of sales—services		2.9		2.2		8.2		6.3
Total cost of sales		6.1		4.7		17.4		13.3
Selling, general and administrative		21.4		19.8		63.0		57.6
Research and development		7.4		5.9		21.4		16.6
Stock-based compensation expense before income taxes		34.9		30.4		101.8		87.5
Income tax effect		10.4		9.1		32.1		25.0
Stock-based compensation expense after income taxes	$	24.5	$	21.3	$	69.7	$	62.5

The fair value of each option grant and the fair value of the option component of the ESPP shares were estimated at the date of grant using the Black-Scholes option pricing model with the following weighted average assumptions, assuming no expected dividends:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2011			2010			2011			2010
Stock Options
Average risk free interest rate		1.13	%		1.61	%		2.24	%		2.28	%
Average expected term (years)		4.5			4.8			4.8			4.8
Average expected volatility		35	%		44	%		35	%		35	%
Weighted average fair value at grant date	$	115.09		$	121.32		$	114.69		$	112.32
Total stock-based compensation expense (in millions)	$	32.9		$	28.1		$	95.7		$	81.3
ESPP
Average risk free interest rate		0.27	%		0.37	%		0.32	%		0.43	%
Average expected term (years)		1.3			1.3			1.3			1.3
Average expected volatility		31	%		43	%		33	%		39	%
Weighted average fair value at grant date	$	112.75		$	110.90		$	99.94		$	106.72
Total stock-based compensation expense (in millions)	$	2.0		$	2.3		$	6.1		$	6.2

NOTE 9. INCOME TAXES

Income tax expense for the three months ended September 30, 2011 was $58.4 million, or 32.3% of pre-tax income, compared with

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$50.5 million, or 36.8% of pre-tax income for the three months ended September 30, 2010. Income tax expense for the nine months ended September 30, 2011 was $162.7 million, or 32.1% of pre-tax income, compared with $154.5 million, or 37.2% of pre-tax income for the nine months ended September 30, 2010. The effective tax rate for the three and nine months ended September 30, 2011 differs from the U.S. federal statutory rate of 35% primarily due to the effect of income earned by certain of the Company’s overseas entities being taxed at rates lower than the federal statutory rate and research & development credits (“R&D credits”), partially offset by state income taxes and non-deductible stock option expenses. The Company intends to indefinitely reinvest the foreign earnings outside the United States. The effective tax rate for the three and nine months ended September 30, 2010 differs from the federal statutory rate primarily due to state income taxes and non-deductible stock option expenses, partially offset by the effect of income earned by certain of the Company’s overseas entities being taxed at rates lower than the federal statutory rate. The decrease in effective tax rates for the three and nine months ended September 30, 2011 compared with the three and nine months ended September 30, 2010 is primarily related to R&D credits, the decrease in California tax after the adoption of single sales factor apportionment effective January 1, 2011, and an increase in foreign earnings taxed at lower rates relative to domestic income.

As of September 30, 2011, the Company has total gross unrecognized tax benefits of approximately $91.5 million compared with approximately $78.9 million as of December 31, 2010, representing an increase of approximately $12.6 million for the nine months ended September 30, 2011. Of the total gross unrecognized tax benefits, $87.2 million and $74.7 million as of September 30, 2011 and December 31, 2010, respectively, if recognized, would reduce the effective tax rate in the period of recognition. Gross interest related to unrecognized tax benefit accrued was approximately $7.2 million and $5.5 million, respectively, as of September 30, 2011 and December 31, 2010.

The Company files federal, state and foreign income tax returns in many jurisdictions in the United States and abroad. For U.S. federal and California income tax purposes, the statutes of limitations currently remain open for all years since inception due to utilization of net operating losses and R&D credits generated in prior years. Certain of the Company’s unrecognized tax benefits could reverse based on the normal expiration of various statutes of limitations, which could affect the Company’s effective tax rate in the period in which they reverse.

NOTE 10. NET INCOME PER SHARE

The following table presents the computation of basic and diluted net income per share (in millions, except per share data):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2011		2010		2011		2010
Net income	$	122.4	$	86.6	$	343.9	$	260.6
Basic:
Weighted-average shares outstanding		39.1		39.4		39.2		39.2
Basic net income per share	$	3.13	$	2.20	$	8.77	$	6.65
Diluted:
Weighted-average shares outstanding used in basic calculation		39.1		39.4		39.2		39.2
Add common stock equivalents		1.0		1.1		1.0		1.2
Weighted-average shares used in computing diluted net income per share		40.1		40.5		40.2		40.4
Diluted net income per share	$	3.05	$	2.14	$	8.55	$	6.45

Employee stock options to purchase approximately 2.2 million and 1.7 million weighted shares for the three months ended September 30, 2011 and 2010, respectively, and 2.2 million and 1.2 million weighted shares for the nine months ended September 30, 2011 and 2010, respectively, were outstanding, but were not included in the computation of diluted net income per share because the effect of including such shares would have been antidilutive in the periods presented.

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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

In this report, “Intuitive Surgical,” “Intuitive,” the “Company,” “we,” “us,” and “our” refer to Intuitive Surgical, Inc. and its wholly-owned subsidiaries.

This management’s discussion and analysis of financial condition as of September 30, 2011 and results of operations for the three and nine months ended September 30, 2011 and 2010 should be read in conjunction with management’s discussion and analysis of financial condition and results of operations included in our Annual Report on Form 10-K for the year ended December 31, 2010.

This report contains “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. Forward-looking statements relate to expectations concerning matters that are not historical facts. Words such as “projects,” “believes,” “anticipates,” “plans,” “expects,” “intends,” “may,” “will,” “could,” “should,” “would,” “targeted,” and similar words and expressions are intended to identify forward-looking statements. These forward-looking statements include, but are not limited to, statements related to our expected business, new product introductions, procedures and procedure adoption, results of operations, future financial position, our ability to increase our revenues, the mix of our revenues between product and service revenues, our financing plans and capital requirements, our costs of revenue, our expenses, our potential tax assets or liabilities, the effect of recent accounting pronouncements, our investments, cash flows and our ability to finance operations from cash flows and similar matters and include statements based on current expectations, estimates, forecasts and projections about the economies and markets in which we operate and our beliefs and assumptions regarding these economies and markets. These forward-looking statements should be considered in light of various important factors, including the following: the impact of the global and regional economic conditions and related credit markets and related impact on health care spending; health care reform legislation in the United States and its implications on hospital spending, reimbursement and fees which will be levied on certain medical device revenues; timing and success of product development and market acceptance of developed products; procedure counts; regulatory approvals, clearances and restrictions; guidelines and recommendations in the health care and patient communities; intellectual property positions and litigation; competition in the medical device industry and in the specific markets of surgery in which we operate; unanticipated manufacturing disruptions; delays in regulatory approvals of new manufacturing facilities or the inability to meet demand for products; the results of the year-end audit and other risk factors. Readers are cautioned that these forward-looking statements are based on current expectations and are subject to risks, uncertainties, and assumptions that are difficult to predict, including those risk factors described throughout this filing and detailed in the Annual Report on Form 10-K for the fiscal year ended December 31, 2010 and other periodic filings with the Securities and Exchange Commission, particularly in Part I, “Item 1A: Risk Factors”. Our actual results may differ materially and adversely from those expressed in any forward-looking statements. We undertake no obligation to revise or update any forward-looking statements for any reason.

Intuitive^® , Intuitive Surgical^®, da Vinci^®, da Vinci S^®, da Vinci^® S HD Surgical System ^®, da Vinci^® Si™, da Vinci^® Si-e™ Surgical System, da Vinci^® Single-Site^™ , EndoWrist^®, and InSite^® are trademarks of Intuitive Surgical, Inc.

Overview

Products. We design, manufacture and market da Vinci Surgical Systems, which are advanced surgical systems that we believe represent a new generation of surgery. We believe that this new generation of surgery, which we call da Vinci surgery, is a significant advancement similar in scope to previous generations of surgery—open surgery and minimally invasive surgery, or conventional MIS. The da Vinci Surgical System consists of a surgeon’s console, or consoles, a patient-side cart and a high performance vision system. The da Vinci Surgical System translates the surgeon’s natural hand movements, which are performed on instrument controls at a console, into corresponding micro-movements of instruments positioned inside the patient through small incisions, or ports. We believe that the da Vinci Surgical System provides the surgeon with intuitive control, range of motion, fine tissue manipulation capability and high definition 3-D vision, while simultaneously allowing the surgeons to work through the small ports of MIS.

By placing computer-enhanced technology between the surgeon and the patient, we believe that the da Vinci Surgical System enables surgeons to deliver higher value minimally invasive surgical procedures to their patients. We model patient value as equal to: procedure efficacy / invasiveness. Here procedure efficacy is a measure of the success of the surgery in resolving the underlying disease and invasiveness is how disruptive and painful the treatment is itself. When the patient value of robotic surgery is significantly higher than competing treatment options, we have seen that patients will seek out surgeons and hospitals that offer da Vinci procedures, potentially resulting in a local shift of treatment approach and market share. The combination of these local adoptions can drive a disruptive change in the marketplace and can lead to the broad adoption of robotic surgery. These adoptions occur procedure by procedure, and are driven by the relative patient value of da Vinci procedures against alternatives for the same disease state.

Business Model. In our business model, we generate revenue from both the initial capital sales of da Vinci Surgical Systems as well as recurring revenue, derived from sales of instruments, accessories, and service. The da Vinci Surgical System generally sells for between $1.0 million and $2.3 million, depending on configuration and geography, and represents a significant capital equipment investment for our customers. We then generate recurring revenue as our customers consume our EndoWrist instruments and

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accessory products for use in performing procedures with the da Vinci Surgical System. EndoWrist instruments and accessories have a limited life and will either expire or wear out as they are used in surgery, at which point they are replaced. We also generate recurring revenue from ongoing system service. We typically enter into service contracts at the time systems are sold. These service contracts have been generally renewable at the end of the service period, typically at an annual rate of approximately $100,000 to $170,000 per year, depending on the configuration of the underlying system.

Recurring revenue has grown at a rate equal to or faster than the rate of growth of system revenue. Recurring revenue increased from $419.6 million, or 48% of total revenue in 2008 to $561.7 million, or 53% of total revenue in 2009 to $752.7 million, or 53% of total revenue in 2010. Recurring revenue for the three months ended September 30, 2011 was $247.6 million or 55% of total revenue and for the nine months ended September 30, 2011 was $707.7 million, or 56% of total revenue. The increase in recurring revenue relative to system revenue reflects continuing adoption of procedures on a growing base of installed da Vinci Surgical Systems. We expect recurring revenue to become a larger percentage of total revenue in the future. The installed base of da Vinci Surgical Systems has grown to 2,031 at September 30, 2011, compared with 1,933 at June 30, 2011 and 1,752 at December 31, 2010.

Regulatory Activities

We believe that we have obtained the clearances required to market our products to our targeted surgical specialties within the United States. As we make additions to target procedures, we will continue to seek the necessary clearances. The following table lists chronologically our U.S. Food & Drug Administration (“FDA”) clearances to date:

• July 2000—General laparoscopic procedures

• March 2001—Non-cardiac thoracoscopic procedures

• May 2001—Prostatectomy procedures

• November 2002—Cardiotomy procedures

• July 2004—Cardiac revascularization procedures

• March 2005—Urologic surgical procedures

• April 2005—Gynecologic surgical procedures

• June 2005—Pediatric surgical procedures

• December 2009—Transoral Otolaryngologic surgical procedures

During the first quarter of 2009, we received clearance to market our da Vinci Si Surgical System in the United States and Europe.

In November 2009, we received regulatory (Shonin) approval from the Japanese Ministry of Health, Labor, and Welfare (MHLW) for our da Vinci S System in Japan. During the three and nine months ended September 30, 2011 we sold 6 and 15 da Vinci S Systems, respectively, compared to 4 and 12 systems, respectively, during the same periods in 2010 in Japan. These sales were primarily made to early adopters. We are currently focusing our efforts on obtaining specific reimbursement for da Vinci procedures in Japan. If we are not successful in obtaining the necessary reimbursement approvals or obtaining approvals for future products and procedures, then the demand for our products could be limited. We have partnered with the experienced regulatory team from Johnson & Johnson K.K. Medical Company (Japan) in our Japanese regulatory process and are continuing to work with them to meet government requirements. We have partnered with Adachi Co., LTD as our separate independent distribution partner in Japan who is responsible for marketing, selling, and servicing our products in Japan. The March 2011 earthquake and tsunami in Japan and their aftermath have created significant economic uncertainty in that country. Sales to customers located in Japan represented approximately 2% of our total revenue for the nine months ended September 30, 2011. We believe economic activity in the country may be disrupted for a substantial period of time, including a reduction in hospital spending. As a result, our sales in Japan may be adversely affected. Given

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the relatively small proportion of our total revenue coming from Japanese customers, we do not expect the overall impact on our revenues resulting from the earthquake and tsunami in Japan to be material. However, we do expect demand for our products in Japan to be curtailed through 2012 as health spending resources are redeployed into more immediately critical areas. At this time, we do not believe that we face any critical inventory supply issues related to Japanese sourced components.

2011 Business Events and Trends

Economic Environment. During the first half of 2009, the world-wide economic recession curtailed capital purchases of our da Vinci Surgical Systems. Beginning in the second half of 2009 through the third quarter of 2011, the U.S. economy has been recovering slowly. Demand for da Vinci systems in Europe has recovered more slowly than in the U.S. European demand, driven by procedure growth, has been stronger and more consistent in the larger German, French, and Italian markets. Demand in the smaller European economies has been more sporadic. Demand for da Vinci systems fluctuates quarter to quarter based upon changing economic and geopolitical factors. The 133 and 382 total da Vinci Surgical Systems sold in the three and nine months ended September 30, 2011 exceeded those sold during the same periods of 2010 by 28 and 65 systems, respectively.

da Vinci Si Surgical System Market Acceptance. In the second quarter of 2009 we launched our newest da Vinci model, the da Vinci Si. The da Vinci Si Surgical System was FDA approved and CE (Conformite Europeene) marked upon launch and is currently available in most countries in Europe and Asia, excluding Japan, among others. da Vinci Si Systems are available with an option to purchase a second console. Existing da Vinci S instruments and most da Vinci S accessories, excluding endoscopes and drapes, are compatible with the da Vinci Si system. The da Vinci S System can be upgraded to the da Vinci Si System; however, most customers have chosen to trade-out their da Vinci S Systems rather than receiving component level field upgrades. We continue to sell, service and support the da Vinci S Surgical System as well. Our sales of the standard da Vinci Surgical System have substantially ended; however, we continue to service and support this product line as well.

Market acceptance of the da Vinci Si Surgical System has been positive since its market introduction in the first quarter of 2009. During the three and nine months ended September 30, 2011, 117 out of 133 and 351 out of 382 systems sold, respectively, were da Vinci Si models, representing approximately 88% and 92%, respectively, of system sales for the three and nine months ended September 30, 2011.

In the third quarter of 2010, we introduced the new Si-e model of the da Vinci Surgical System. The 3-arm Si-e System is designed to deliver core da Vinci functionality, providing a flexible, capable and economical solution for many robotic-assisted procedures. The da Vinci Si-e system is fully upgradeable to the da Vinci Si model by adding a fourth arm (third instrument arm), and other enhancements. During the three and nine months ended September 30, 2011, we sold 4 and 11 da Vinci Si-e systems, respectively.

da Vinci Skills Simulator. In the first quarter of 2011, we began shipping the da Vinci Skills Simulator. The simulator is a practice tool for the da Vinci Si Surgical System that gives a user the opportunity to practice in his or her facility with the surgeon console controls. The simulator incorporates three-dimensional, physics-based computer simulation technology to immerse the user within a virtual environment. The user navigates through the environment and completes exercises by controlling virtual instruments from the surgeon console. The suite of exercises includes novice, intermediate, and advanced levels. Upon completion of a skills exercise, the simulator provides a quantitative assessment of user performance based on a variety of task-specific metrics. The simulator is intended to augment, not replace, existing training programs for the da Vinci Si Surgical System. Most da Vinci Skills Simulators have been sold in connection with new da Vinci Si Surgical System sales. Demand for the da Vinci Skills Simulator product has been strong. We sold 98 and 260 da Vinci Skills Simulators in the three and nine months ended September 30, 2011, respectively.

da Vinci Single-Site instruments. In February 2011 we received the CE mark for our da Vinci Single-Site instrument kit and began selling these new products in Europe. da Vinci Single-Site is a set of instruments and accessories that allow da Vinci Si systems to work through a single incision rather than three incisions. Single incision surgery is intended to minimize trauma to patients by

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reducing the number of ports required to enter the body. Single incision surgery today is typically performed with modified laparoscopic instruments. Early clinical adoption of this manual technique has been encouraging, however, physicians have reported that manual single incision surgery is technically and ergonomically challenging. da Vinci Single-Site instruments and accessories were designed to address these issues. The vast majority of da Vinci Single-Site procedures performed to date has been cholecystectomies. da Vinci Single-Site instruments and accessories are not yet FDA cleared for sale in the U.S.

da Vinci Fluorescence Imaging. In the first quarter of 2011, we launched our new da Vinci Fluorescence Imaging product in the U.S. This new accessory offering combines fluorescent dye with a specialized da Vinci endoscope and illuminator to allow surgeons to see vasculature in three dimensions beneath tissue surfaces to assess blood flow. The fluorescent images integrate into the da Vinci surgeon console, providing the surgeon with real time images. Surgeons have reported that da Vinci Fluorescence Imaging enables them to work with more confidence and precision during partial nephrectomy. Our phased roll-out of the da Vinci Fluorescence Imaging product is progressing, with its initial use targeted in partial nephrectomy procedures.

Other Product Introductions. In the second quarter of 2011, we released in the U.S. and Europe our new thoracic grasper and dissecting bipolar instruments. In the U.S. we also released a medium/large clip applier. These new instruments are targeted to enhance the da Vinci System’s surgical capability in emerging lobectomy and general surgery procedures. We had also received the CE mark in the second quarter of 2011 and FDA approval in the third quarter of 2011 for our new suction-irrigation instrument, which is also designed to facilitate thoracic as well as general surgery and gynecologic procedures.

Procedure Adoption

We believe the adoption of da Vinci surgery occurs surgical procedure by surgical procedure, and is being adopted for those procedures which offer significant patient value. The value of a surgical procedure to a patient is higher if it offers superior clinical outcomes, less surgical trauma, or both.

An increasing body of peer reviewed literature has indicated that many of our targeted procedures offer improved clinical outcomes compared to traditional open surgery. For example, it has been reported that da Vinci Prostatectomy (“dVP”) offers less surgical and post-surgical morbidity and da Vinci Hysterectomy (“dVH”) for cancerous conditions offers increased lymph node retrieval counts and a significant reduction in blood transfusions. We believe that for many patients, a minimally invasive approach using the da Vinci Surgical System offers reduced pain, less blood loss, shorter hospital stays, reduced post-operative complications and a quicker return to normal daily activities when compared to open surgery.

In 2010, approximately 278,000 surgical procedures were performed with the da Vinci Surgical System, up approximately 35% compared to 2009. The growth in our overall procedure volume was driven primarily by: dVH in the U.S., dVP outside the U.S. and follow-on procedures in the Urology and Gynecology categories (Partial Nephrectomy, Cystectomy, Pyeloplasty, Sacrocolpopexy, Myomectomy) in the U.S. Total da Vinci surgical procedures for both the three and nine months ended September 30, 2011 grew year over year by approximately 30%, compared with 33% and 35% for the same periods in 2010.

During 2010, dVH became our highest volume procedure, surpassing dVP. dVH procedure volume grew from approximately 69,000 cases in 2009 to approximately 110,000 cases in 2010. The vast majority of our 2010 dVH volume came from the U.S. market, where we estimate the total annual addressable robotic market to be approximately 300,000 to 350,000 cases, of which about 50,000 are for cancer.

dVP procedure volume grew from approximately 90,000 cases in 2009 to approximately 98,000 cases worldwide in 2010. The large majority of the approximately 85,000 prostatectomies performed each year in the U.S. are done robotically with the da Vinci Surgical System. The majority of our 2010 worldwide dVP growth came from European markets, while our 2010 U.S. dVP volume was essentially flat.

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Other procedures (non-dVH/dVP) grew over 50% in 2010. Growth in these other da Vinci procedures is comprised of follow-on procedures such as da Vinci Partial Nephrectomy in Urology and da Vinci Sacrocolpopexy in Gynecology as well as other procedures, which we term emerging procedures. Emerging procedures are earlier in their development, such as da Vinci Transoral Robotic Surgery (“dVTORS”) in head and neck surgery. While early results in emerging procedures are encouraging and may point to significant patient value, their growth is based on a small absolute base and their future growth rates are uncertain.

As we increase our penetration into benign dVH and other benign conditions, our procedure volumes are likely to reflect more seasonality as patients have more short-term flexibility regarding when these procedures are performed. Historically, we have experienced relatively lower procedure counts in the first quarter, as insurance deductibles are reset, and the third quarter, attributable to vacation season, especially in Europe. The fourth quarter has historically been the seasonally strongest procedure quarter, as more insurance deductibles are met. Timing of procedures and changes in procedure growth directly affect the timing of instruments and accessory purchases and capital purchases.

Technology Acquisitions

We make strategic acquisitions of intellectual property and related technologies from time to time. Total investments in intellectual property and related technologies during the three and nine months ended September 30, 2011 were $2.5 million and $7.5 million, respectively, compared to $31.7 million and $38.2 million, respectively, during the same periods in 2010. Amortization expense related to purchased intellectual property for the three and nine months ended September 30, 2011 was $4.2 million and $12.9 million, respectively, compared to $4.3 million and $11.9 million, respectively, during the same periods in 2010.

Third Quarter 2011 Financial Highlights

• Total revenue increased to $446.7 million, or 30%, during the three months ended September 30, 2011 from $344.4 million during the three months ended September 30, 2010.

• da Vinci procedures performed during the three months ended September 30, 2011 were up approximately 30% compared to the three months ended September 30, 2010.

• Instruments and accessories revenue increased to $175.8 million, or 38%, during the three months ended September 30, 2011 from $127.5 million during the three months ended September 30, 2010.

• Recurring revenue increased to $247.6 million, or 34%, during the three months ended September 30, 2011, representing 55% of total revenue, compared with $184.8 million during the three months ended September 30, 2010, representing 54% of total revenue.

• We sold 133 da Vinci Surgical Systems during the three months ended September 30, 2011, compared with 105 during the three months ended September 30, 2010.

• System revenue increased to $199.1 million, or 25%, during the three months ended September 30, 2011 from $159.6 million during the three months ended September 30, 2010.

• As of September 30, 2011, we had a da Vinci Surgical System installed base of 2,031 systems; 1,478 in the United States, 357 in Europe, and 196 in the rest of the world.

• We added 76 employees during the three months ended September 30, 2011, the majority of which were in product operations, field sales, service, and training, bringing our total headcount to 1,845 as of September 30, 2011.

• Operating income increased to $178.9 million, or 35%, during the three months ended September 30, 2011 compared to

20

$132.1 million during the three months ended September 30, 2010. Operating income included $34.9 million and $30.4 million during the three months ended September 30, 2011 and 2010, respectively, of stock-based compensation expense related to employee stock programs.

• As of September 30, 2011, we had $1,887.3 million in cash, cash equivalents and investments. Cash, cash equivalents, and investments increased by $65.3 million during the three months ended September 30, 2011 driven primarily by cash flow from operations and $90.5 million generated from employee stock programs, partially offset by $181.1 million of stock repurchases.

RESULTS OF OPERATIONS

The following table sets forth, for the periods indicated, certain unaudited Condensed Consolidated Statements of Income information (in millions):

	Three Months Ended September 30,										Nine Months Ended September 30,
	2011		% of total revenue			2010		% of total revenue			2011		% of total revenue			2010		% of total revenue
Revenue:
Product	$	374.9		84	%	$	287.1		83	%	$	1,057.5		84	%	$	860.4		84	%
Service		71.8		16	%		57.3		17	%		203.0		16	%		163.3		16	%
Total revenue		446.7		100	%		344.4		100	%		1,260.5		100	%		1,023.7		100	%
Cost of revenue:
Product		96.2		21	%		72.8		21	%		274.5		22	%		213.5		21	%
Service		25.0		6	%		21.0		6	%		75.1		6	%		62.3		6	%
Total cost of revenue		121.2		27	%		93.8		27	%		349.6		28	%		275.8		27	%
Product gross profit		278.7		63	%		214.3		62	%		783.0		62	%		646.9		63	%
Service gross profit		46.8		10	%		36.3		11	%		127.9		10	%		101.0		10	%
Gross profit		325.5		73	%		250.6		73	%		910.9		72	%		747.9		73	%
Operating expenses:
Selling, general, and administrative		111.2		25	%		91.6		27	%		316.8		25	%		263.0		26	%
Research and development		35.4		8	%		26.9		8	%		98.8		8	%		83.4		8	%
Total operating expenses		146.6		33	%		118.5		34	%		415.6		33	%		346.4		34	%
Income from operations		178.9		40	%		132.1		38	%		495.3		39	%		401.5		39	%
Interest and other income, net		1.9		0	%		5.0		2	%		11.3		1	%		13.6		1	%
Income before taxes		180.8		40	%		137.1		40	%		506.6		40	%		415.1		41	%
Income tax expense		58.4		13	%		50.5		15	%		162.7		13	%		154.5		15	%
Net income	$	122.4		27	%	$	86.6		25	%	$	343.9		27	%	$	260.6		25	%

Total Revenue

Total revenue was $446.7 million for the three months ended September 30, 2011 compared to $344.4 million for the three months ended September 30, 2010. For the nine months ended September 30, 2011, revenue increased to $1,260.5 million from $1,023.7 million for the nine months ended September 30, 2010. Revenue growth for the nine months ended September 30, 2011 was driven by the continued adoption of da Vinci surgery, driving higher system and recurring revenue. We believe that robotic surgery will be adopted surgical procedure by surgical procedure. Our revenue growth during the periods presented reflects adoption progress made in our targeted procedures. dVH and dVP are our two largest procedures, representing more than 70% of our total procedures over the past several years. An increasing body of peer reviewed literature has indicated that dVP offers superior surgical outcomes compared to traditional open prostatectomies in the critical categories of cancer removal, continence, and sexual potency. Favorable clinical results have been reported in hysterectomies for cancerous pathology, which include increased lymph node retrieval counts and

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significant reduction in blood transfusion. We believe that for many patients, a minimally invasive approach using the da Vinci Surgical System offers reduced pain, less blood loss, shorter hospital stays, reduced post-operative complications and a quicker return to normal daily activities.

Revenue within the United States accounted for 79% and 78% of total revenue for the three and nine months ended September 30, 2011, and 83% and 81% of total revenue for the three and nine months ended September 30, 2010, respectively. We believe domestic revenue has accounted for the large majority of total revenue primarily due to more rapid procedure adoption in the United States, driven by the ability of patients to choose their providers and methods of treatment. For the three and nine months ended September 30, 2011, international revenue grew as percentage of total revenue compared to the same period last year, primarily due to higher European sales driven by increased dVP penetration in Europe.

The following table summarizes our revenue and da Vinci Surgical System unit sales for the three and nine months ended September 30, 2011 and 2010 (in millions, except percentages and unit sales):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2011			2010			2011			2010
Revenue
Instruments and accessories	$	175.8		$	127.5		$	504.7		$	377.7
Systems		199.1			159.6			552.8			482.7
Total product revenue		374.9			287.1			1,057.5			860.4
Services		71.8			57.3			203.0			163.3
Total revenue	$	446.7		$	344.4		$	1,260.5		$	1,023.7
Recurring revenue	$	247.6		$	184.8		$	707.7		$	541.0
% of total revenue		55	%		54	%		56	%		53	%
Domestic	$	352.3		$	285.0		$	988.4		$	832.9
International		94.4			59.4			272.1			190.8
Total revenue	$	446.7		$	344.4		$	1,260.5		$	1,023.7
% of Revenue – Domestic		79	%		83	%		78	%		81	%
% of Revenue – International		21	%		17	%		22	%		19	%
Domestic Unit Sales		99			83			287			249
International Unit Sales		34			22			95			68
Total Unit Sales		133			105			382			317

Product Revenue

Product revenue was $374.9 million for the three months ended September 30, 2011 compared with $287.1 million for the three months ended September 30, 2010.

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Instruments and accessories revenue increased to $175.8 million for the three months ended September 30, 2011 compared with $127.5 million for the three months ended September 30, 2010. The 38% increase in revenue was primarily driven by a 30% increase in procedures performed, sales of newer products including our 8.5mm scopes and fluorescent imaging products, and buying patterns of customers. Procedure growth was primarily driven by hysterectomy and, to a lesser extent, prostatectomy adoption, largely in Europe. Higher procedure volume in follow-on gynecologic procedures, including sacrocolpopexies and myomectomies, follow-on urologic procedures, including partial and full nephrectomies, and emerging procedures, including low anterior resection, lobectomy, and transoral surgeries also contributed to the 2011 procedure growth.

Systems revenue increased to $199.1 million during the three months ended September 30, 2011 from $159.6 million during the three months ended September 30, 2010 primarily due to higher da Vinci system unit sales and higher average selling price, or ASP. We sold 133 da Vinci Surgical Systems during the three months ended September 30, 2011, compared with 105 in the same period in 2010. 117 of the 133 systems sold during the three months ended September 30, 2011 were the da Vinci Si Surgical Systems. 14 standard and 21 da Vinci S Surgical Systems were traded in as part of da Vinci Si purchase transactions during the three months ended September 30, 2011, compared with 15 standard systems traded in during the same period last year. Systems revenue during the three months ended September 30, 2010 included $8.6 million of da Vinci S to da Vinci Si upgrade revenue. Prior to the fourth quarter 2010, transactions involving customers transitioning from da Vinci S to a da Vinci Si system were included in upgrade revenue and excluded from the system count. Our present treatment reflects the current nature of the higher-priced transactions where customers are now shipped completely new da Vinci Si systems in exchange for their used da Vinci S systems, rather than receiving component level field upgrades of their da Vinci S units. System upgrade revenue was $4.7 million during the three months ended September 30, 2011 compared to $9.7 million during the same period in 2010. The da Vinci system ASP was $1.46 million during the three months ended September 30, 2011 compared to $1.43 million for the same period in 2010. The higher 2011 system ASP resulted primarily from favorable product and customer mix and revenue associated with the sales of da Vinci Skills Simulators, which are generally sold in connection with new system sales. 98 simulators were sold during the three months ended September 30, 2011, compared with none during the same period in 2010.

Product revenue was $1,057.5 million for the nine months ended September 30, 2011 compared with $860.4 million for the nine months ended September 30, 2010.

Instruments and accessories revenue increased to $504.7 million for the nine months ended September 30, 2011 compared with $377.7 million for the nine months ended September 30, 2010. The 34% increase in revenue was driven by the same factors driving instruments and accessories revenue growth for the three months ended September 30, 2011 and 2010 as described above.

Systems revenue increased to $552.8 million during the nine months ended September 30, 2011 from $482.7 million during the nine months ended September 30, 2010 primarily due to higher da Vinci system unit sales, partially offset by a lower ASP. We sold 382 da Vinci Surgical Systems during the nine months ended September 30, 2011, compared with 317 in the same period in 2010. 351 of the 382 systems sold during the nine months ended September 30, 2011 were the da Vinci Si Surgical Systems. 42 standard and 61 da Vinci S Surgical Systems were traded in as part of da Vinci Si purchase transactions during the nine months ended September 30, 2011, compared with 51 standard systems traded in during the same period in 2010. System revenue during the nine months ended September 30, 2010 included $19.1 million of da Vinci S to da Vinci Si upgrade revenue. Prior to the fourth quarter 2010, transactions involving customers transitioning from da Vinci S to a da Vinci Si system were included in upgrade revenue and excluded from the system count. Our present treatment reflects the current nature of the higher-priced transactions where customers are now shipped completely new da Vinci Si systems in exchange for their used da Vinci S systems, rather than receiving component level field upgrades of their da Vinci S units. System upgrade revenue was $7.0 million during the nine months ended September 30, 2011 compared to $22.3 million during the same period in 2010. The da Vinci system ASP was $1.43 million during the nine months ended September 30, 2011 compared to $1.45 million during the same period in 2010. The lower 2011 ASP resulted primarily from a higher proportion of system sales involving trade-ins, and the associated credits for the returned units, partially offset by the sale of da Vinci Skills Simulators, sold largely in connection with new system sales. 260 simulators were sold during the nine months ended September 30, 2011.

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Service Revenue

Service revenue, comprised primarily of system service and customer training, increased 25% to $71.8 million for the three months ended September 30, 2011 compared with $57.3 million for the three months ended September 30, 2010. We typically enter into system service contracts at the time systems are sold. These service contracts have been generally renewed at the end of the service period. Higher service revenue for the three months ended September 30, 2011 was primarily driven by a larger base of da Vinci Surgical Systems producing contract service revenue.

Service revenue increased 24% to $203.0 million for the nine months ended September 30, 2011 compared with $163.3 million for the nine months ended September 30, 2010. Higher service revenue during the first nine months of 2011 was primarily driven by a larger base of da Vinci Surgical Systems producing contract service revenue.

Gross Profit

Product gross profit for the three months ended September 30, 2011 increased 30% to $278.7 million, or 74.3% of product revenue, compared with $214.3 million, or 74.6% of product revenue, for the three months ended September 30, 2010. Product gross profit for the nine months ended September 30, 2011 increased 21% to $783.0 million, or 74.0% of product revenue, compared with $646.9 million, or 75.2% of product revenue, for the nine months ended September 30, 2010. The higher product gross profit was driven by higher 2011 product revenue, as described above. The slightly lower product gross profit percentages for the three month period ended September 30, 2011 reflects the inclusion of lower margin da Vinci Skills Simulators and fluorescence imaging products and reserves taken for older products, partially offset by the higher ASP of the da Vinci systems. Lower product gross profit percentages for the nine month period ended September 30, 2011 reflect the lower ASP of the da Vinci systems as previously described, the inclusion of lower margin da Vinci Skills Simulators in 2011, and higher reserves taken for excess inventory.

Service gross profit for the three months ended September 30, 2011 increased 29% to $46.8 million, or 65.2% of service revenue, compared with $36.3 million, or 63.4% of service revenue, for the three months ended September 30, 2010. Service gross profit for the nine months ended September 30, 2011 increased 27% to $127.9 million, or 63.0% of service revenue, compared with $101.0 million, or 61.8% of service revenue, for the nine months ended September 30, 2010. The higher 2011 service gross profit was driven by higher service revenue, as described above. The higher gross service profit percentages for the three and nine months ended September 30, 2011 were primarily driven by lower service parts consumption and costs associated with field upgrades.

Selling, General and Administrative Expenses

Selling, general and administrative expenses include costs for sales, marketing and administrative personnel, proctoring expenses, tradeshow expenses, legal expenses, regulatory fees and general corporate expenses.

Selling, general and administrative expenses for the three months ended September 30, 2011 increased 21% to $111.2 million compared with $91.6 million for the three months ended September 30, 2010. Selling, general and administrative expenses for the nine months ended September 30, 2011 increased 20% to $316.8 million compared with $263.0 million for the nine months ended September 30, 2010. The increases were due to organizational growth to support our expanding business, particularly in the clinical field sales function, higher commissions related to higher revenue levels, and increased stock-based compensation expenses. Stock-based compensation expenses charged to sales, general and administrative expenses were approximately $21.4 million and $63.0 million for the three and nine months ended September 30, 2011, respectively, compared with $19.8 million and $57.6 million, respectively, for the same periods in 2010.

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Research and Development Expenses

Research and development costs are expensed as incurred. Research and development expenses include costs associated with the design, development, testing and enhancement of our products. These enhancements represent significant improvements to our products.

Research and development expenses for the three months ended September 30, 2011 increased 32% to $35.4 million compared with $26.9 million for the three months ended September 30, 2010. Research and development expenses for the nine months ended September 30, 2011 increased 18% to $98.8 million compared with $83.4 million for the nine months ended September 30, 2010. The increases were due to the growth in our research and development organization, higher prototype costs, and higher stock-based compensation expenses. Amortization expense related to purchased intellectual property during the three months ended September 30, 2011 was $3.2 million, compared to $3.7 million during the same period in 2010. Amortization expense related to purchased intellectual property during the nine months ended September 30, 2011 was $10.2 million compared to $10.8 million during the same period in 2010. Stock-based compensation expense during the three months ended September 30, 2011 and 2010 were approximately $7.4 million and $5.9 million, respectively. Stock-based compensation expenses during the nine months ended September 30, 2011 and 2010 were approximately $21.4 million and $16.6 million, respectively. We expect to continue to make substantial investments in research and development and anticipate that research and development expense, including co-development arrangements with industry partners, will continue to increase in the future.

Interest and Other Income, Net

Interest and other income, net for the three months ended September 30, 2011 was $1.9 million compared with $5.0 million for the three months ended September 30, 2010. Lower interest and other income, net for the three months ended September 30, 2011 was driven by other non-operating expenses, foreign exchange losses, as well as lower interest income earned on higher cash and investment balances.

Interest and other income, net for the nine months ended September 30, 2011 was $11.3 million, which was $2.3 million less than the $13.6 million recorded for the nine months ended September 30, 2010, driven by lower interest income resulting from lower rates earned on higher cash and investment balances, lower foreign exchange gains, and other non-operating expenses.

Income Tax Expense

Income tax expense for the three months ended September 30, 2011 was $58.4 million, or 32.3% of pre-tax income, compared with $50.5 million, or 36.8% of pre-tax income for the three months ended September 30, 2010. Income tax expense for the nine months ended September 30, 2011 was $162.7 million, or 32.1% of pre-tax income, compared with $154.5 million, or 37.2% of pre-tax income for the nine months ended September 30, 2010. The effective tax rate for the three and nine months ended September 30, 2011 differs from the U.S. federal statutory rate of 35% primarily due to the effect of income earned by certain of our overseas entities being taxed at rates lower than the federal statutory rate and R&D credits, partially offset by state income taxes and non-deductible stock option expenses. We intend to indefinitely reinvest these foreign earnings outside the United States. The effective tax rate for the three and nine months ended September 30, 2010 differs from the U.S. federal statutory rate primarily due to state income taxes and non-deductible stock option expenses, partially offset by the effect of income earned by certain of our overseas entities being taxed at rates lower than the federal statutory rate. The decrease in effective tax rates for the three and nine months ended September 30, 2011 compared with the three and nine months ended September 30, 2010 is primarily related to R&D credits, the decrease in California tax after the adoption of single sales factor apportionment effective January 1, 2011, and an increase in foreign earnings taxed at lower rates relative to domestic income.

As of September 30, 2011, we had total gross unrecognized tax benefits of approximately $91.5 million compared with approximately $78.9 million as of December 31, 2010, representing an increase of approximately $12.6 million for the nine months ended September

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30, 2011. Of the total gross unrecognized tax benefits, $87.2 million and $74.7 million as of September 30, 2011 and December 31, 2010, respectively, if recognized, would reduce our effective tax rate in the period of recognition. Gross interest related to unrecognized tax benefit accrued was approximately $7.2 million and $5.5 million respectively, as of September 30, 2011 and December 31, 2010, respectively.

We file federal, state and foreign income tax returns in many jurisdictions in the United States and abroad. For U.S. federal and California income tax purposes, the statutes of limitations currently remain open for all years since inception due to utilization of net operating losses and R&D credits generated in prior years. Certain of our unrecognized tax benefits could reverse based on the normal expiration of various statutes of limitations, which could affect our effective tax rate in the period in which they reverse.

LIQUIDITY AND CAPITAL RESOURCES

Sources and Uses of Cash

Our principal source of liquidity is cash provided by operations and the exercise of stock options. Cash and cash equivalents plus short and long-term investments increased from $1,609 million at December 31, 2010 to $1,887 million at September 30, 2011. Cash generation is one of our fundamental strengths and provides us with substantial financial flexibility in meeting our operating, investing and financing needs.

Consolidated Cash Flow Data (unaudited)

	Nine Months Ended September 30,
	2011			2010
	(in millions)
Net cash provided by (used in)
Operating activities	$	447.9		$	404.1
Investing activities		(324.6	)		(373.4	)
Financing activities		(105.3	)		130.3
Effect of exchange rates on cash and cash equivalents		0.4			(0.4	)
Net increase in cash and cash equivalents	$	18.4		$	160.6

Operating Activities

For the nine months ended September 30, 2011, cash flow from operating activities of $447.9 million exceeded our net income of $343.9 million for two primary reasons:

1. Our net income included substantial non-cash charges in the form of stock-based compensation, amortization of intangible assets, deferred taxes, and depreciation. These non-cash charges totaled $135.3 million during the nine months ended September 30, 2011.

2. Cash used in working capital and other assets during the nine months ended September 30, 2011 was approximately $31.3 million.

Working capital is comprised primarily of accounts receivable, inventory, deferred revenue and other liabilities. Accounts receivable increased by $18.2 million or 7% during the nine months ended September 30, 2011 reflecting timing of system sales. Inventory increased by $21.8 million or 25% during the nine months ended September 30, 2011 due to our business growth, expanded product offerings, and safety stocks acquired for key components. Deferred revenue increased by $17.7 million or 14% during the nine months ended September 30, 2011 due to the increase in the number of installed systems for which service contracts exist.

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For the nine months ended September 30, 2010, cash flow from operating activities of $404.1 million exceeded our net income of $260.6 million for two primary reasons:

1. Our net income included substantial non-cash charges in the form of stock-based compensation, amortization of intangible assets, deferred taxes, and depreciation. These non-cash charges totaled $98.5 million during the nine months ended September 30, 2010.

2. Cash provided by working capital and other assets during the nine months ended September 30, 2010 was approximately $45.0 million.

Inventory increased by $27.4 million or 48% during the nine months ended September 30, 2010. The growth in inventory reflects increased revenue, increases to ensure adequate supply of key components as December 31^st quantities were below optimal levels and inventory associated with new product introductions. Deferred revenue increased by $17.2 million or 17% during the nine months ended September 30, 2010 related to the increase in the number of installed systems for which service contracts exist. Other liabilities including accounts payable, accrued compensation and employee benefits, and accrued liabilities increased by $57.9 million or 34% during the nine months ended September 30, 2010 primarily due to timing of tax payments and employee compensation during the nine months ended September 30, 2010.

Investing Activities

Net cash used in investing activities during the nine months ended September 30, 2011 consisted primarily of purchases of investments (net of proceeds from sales and maturities of investments) of $256.9 million and capital expenditures and acquisitions of intellectual property of $67.7 million. The $67.7 million of capital expenditures and acquisitions of intellectual property includes $33.1 million in cash used when we completed our purchase of land and buildings near our headquarters in Sunnyvale, California. Net cash used in investing activities during the nine months ended September 30, 2010 consisted of purchases of investments (net of proceeds from sales and maturities of investments) of $286.8 million and capital expenditures and acquisitions of intellectual property of $86.6 million. We invest predominantly in high quality, fixed income securities. Our investment portfolio may at any time contain investments in U.S. Treasury and U.S. government agency securities, taxable and/or tax exempt municipal notes (some of which may have an auction reset feature), corporate notes and bonds, commercial paper, and money market funds. We are not a capital intensive business.

Financing Activities

Net cash used in financing activities during the nine months ended September 30, 2011 consisted primarily of $331.8 million for the repurchase of approximately 1.0 million shares of our common stock through open market transactions, offset by proceeds from stock option exercises and employee stock purchases of $181.6 million and excess tax benefits from stock-based compensation of $44.9 million. Net cash provided by financing activities during the nine months ended September 30, 2010 consisted primarily of proceeds from stock option exercises and employee stock purchases of $132.9 million and excess tax benefits from stock-based compensation of $56.3 million, offset by $58.9 million for the repurchase of approximately 0.2 million shares of our common stock through open market transactions.

CRITICAL ACCOUNTING POLICIES

The discussion and analysis of our financial condition and results of operations are based upon our unaudited Condensed Consolidated Financial Statements, which have been prepared in accordance with accounting principles generally accepted in the United States. The preparation of these financial statements requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses. On an ongoing basis, we evaluate our critical accounting policies and estimates. We base our

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estimates on historical experience and on various other assumptions that we believe to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions. There have been no material changes to our critical accounting policies and estimates discussed in our Annual Report on Form 10-K for the fiscal year ended December 31, 2010.

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

There have been no material changes in our market risk during the nine months ended September 30, 2011 compared to the disclosures in Part II, Item 7A of our Annual Report on Form 10-K for the year ended December 31, 2010.

ITEM 4. CONTROLS AND PROCEDURES

Conclusion Regarding the Effectiveness of Disclosure Controls and Procedures

We maintain disclosure controls and procedures, as such term is defined in SEC Rule 13a-15(e), that are designed to ensure that information required to be disclosed in our Securities Exchange Act of 1934 reports is recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission’s rules and forms and that such information is accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial Officer, as appropriate, to allow for timely decisions regarding required disclosure. In designing and evaluating the disclosure controls and procedures, management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives, and management is required to apply its judgment in evaluating the cost-benefit relationship of possible controls and procedures.

As required by SEC Rule 13a-15(b), we carried out an evaluation, under the supervision and with the participation of our management, including our Chief Executive Officer and Chief Financial Officer, of the effectiveness of the design and operation of our disclosure controls and procedures as of the end of the period covered by this report. Based on the foregoing, our Chief Executive Officer and Chief Financial Officer concluded that our disclosure controls and procedures were effective at the reasonable assurance level.

Changes in Internal Control Over Financial Reporting

There has been no change in our internal controls over financial reporting during our most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, our internal controls over financial reporting.

PART II. OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

From time to time, we may be involved in a variety of claims, lawsuits, investigations and proceedings relating to securities laws, product liability, patent infringement, contract disputes and other matters relating to various claims that arise in the normal course of our business. Certain of these lawsuits are described in further detail below. We do not know whether we will prevail in these matters nor can we assure that any remedy could be reached on commercially reasonable terms, if at all. Based on currently available information, we believe that we have meritorious defenses to these actions and that the resolution of these cases is not likely to have a material adverse effect on our business, financial position or future results of operations. In accordance with U.S. GAAP, we record a liability when it is both probable that a liability has been incurred and the amount of the loss can be reasonably estimated. These provisions are reviewed at least quarterly and adjusted to reflect the impacts of negotiations, settlements, rulings, advice of legal counsel, and other information and events pertaining to a particular case.

Purported Stockholder Class Action Lawsuit filed August 6, 2010

On August 6, 2010, a purported class action lawsuit entitled Perlmutter v. Intuitive Surgical et al., No. CV10-3451, was filed against us and seven of our current and former officers and directors in the United States District Court for the Northern District of California.

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The lawsuit seeks unspecified damages on behalf of a putative class of persons who purchased or otherwise acquired our common stock between February 1, 2008 and January 7, 2009. The complaint alleges that the defendants violated federal securities laws by making allegedly false and misleading statements and omitting certain material facts in our filings with the Securities and Exchange Commission. On February 15, 2011, the Police Retirement System of St. Louis was appointed Lead Plaintiff in the case pursuant to the Private Securities Litigation Reform Act of 1995. An amended complaint was filed on April 15, 2011, making allegations substantially similar to the allegations described above. On May 23, 2011, we filed a motion to dismiss the amended complaint. On August 10, 2011 that motion was granted and the action was dismissed; the plaintiffs were given 30 days to file an amended complaint. On September 12, 2011, plaintiffs filed their amended complaint. The allegations contained therein are substantially similar to the allegations in the prior complaint. We filed a motion to dismiss the amended complaint. A hearing on that motion will not occur until January 2012.

Purported Derivative Actions

On August 19, 2010, an alleged stockholder caused a purported stockholder’s derivative lawsuit entitled Himmel v. Smith et al., No. 1-10-CV-180416, to be filed in the Superior Court of California for the County of Santa Clara naming us as a nominal defendant, and naming 14 of our current and former officers and directors as defendants. The lawsuit seeks to recover, for the company’s benefit, unspecified damages purportedly sustained by us in connection with allegedly misleading statements and/or omissions made in connection with our financial reporting for the period between February 1, 2008 and January 7, 2009. It also seeks a series of changes to our corporate governance policies and an award of attorneys’ fees. On September 15, 2010, another purported stockholder filed an essentially identical lawsuit entitled Applbaum v. Guthart et al., No. 1-10-CV-182645, in the same court against 15 of our current and former officers and directors. On October 5, 2010, the court ordered that the two cases be consolidated for all purposes. By agreement with the plaintiffs, formal discovery has been stayed in the case.

ITEM 1A. RISK FACTORS

There have been no changes to the Risk Factors discussed in our Annual Report on Form 10-K for the fiscal year ended December 31, 2010, except for the below.

NATURAL OR OTHER DISASTERS COULD DISRUPT OUR BUSINESS AND RESULT IN LOSS OF REVENUE OR IN HIGHER EXPENSES.

Natural disasters, terrorist activities and other business disruptions could seriously harm our revenue and financial condition and increase our costs and expenses. For example, the recent earthquake and tsunami in Japan and their aftermath have created significant economic uncertainty in that country. We believe economic activity in the country may be disrupted for a substantial period of time, including a reduction in hospital spending. As a result, our sales in Japan may be adversely affected. In addition, we expect demand for our products in Japan to be further curtailed through 2012 as health spending resources are redeployed into more immediately critical areas.

Our corporate headquarters and many of our operations are located in California, a seismically active region. A natural disaster in any of our major markets in North America or Europe could have a material adverse impact on our operations, operating results and financial condition. Further, any unanticipated business disruption caused by Internet security threats, damage to global communication networks or otherwise could have a material adverse impact on our operating results.

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ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

The table below summarizes our stock repurchase activity for the three months ended September 30, 2011:

Fiscal Period	Total Number of Shares Repurchased		Average Price Paid Per Share		Total Number of Shares Purchased As Part of a Publicly Announced Program		Approximate Dollar Amount of Shares That May Yet be Purchased Under the Program
July 1, 2011 to July 31, 2011		—	$	—		—	$	249.3 million
August 1, 2011 to August 31, 2011		439,125	$	338.55		439,125	$	100.6 million
September 1, 2011 to September 30, 2011		86,802	$	373.77		86,802	$	68.2 million
Total during quarter ended September 30, 2011		525,927	$	344.36		525,927	$	68.2 million

ITEM 3. DEFAULTS UPON SENIOR SECURITIES

None.

ITEM 5. OTHER INFORMATION

As previously reported, at the our Annual Meeting of Stockholders held on April 21, 2011, stockholders voted to recommend, by non-binding vote, that the frequency of the advisory vote on the compensation of our named executive officers be every year. In accordance with the stockholder vote in favor of an advisory vote to occur every year, we have decided to include an advisory vote on the compensation of our named executive officers in our proxy materials every year, until the next required vote on the frequency of the stockholder vote on the compensation of named executive officers.

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ITEM 6. EXHIBITS

Exhibit Number	Description
3.1	Amended and Restated Certificate of Incorporation of Intuitive Surgical, Inc. (incorporated by reference to Exhibit 3.1 on Form 10-K filed with the Securities and Exchange Commission on February 6, 2009).
3.2	Certificate of Amendment to Amended and Restated Certificate of Incorporation of Intuitive Surgical, Inc. (incorporated by reference to Exhibit 3.2 on Form 10-K filed with the Securities and Exchange Commission on February 6, 2009),
3.3	Amended and Restated Bylaws of Intuitive Surgical, Inc. (incorporated by reference to Exhibit 3.1 of the Current Report on Form 8-K filed with the Securities and Exchange Commission on July 26, 2010).
31.1	Certification of the Company’s Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2	Certification of the Company’s Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32.1	Certification of the Company’s Chief Executive Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.2	Certification of the Company’s Chief Financial Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101	The following materials from Intuitive Surgical, Inc.’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2011, formatted in XBRL (Extensible Business Reporting Language): (i) the unaudited Condensed Consolidated Balance Sheets, (ii) the unaudited Condensed Consolidated Statements of Income, (iii) the unaudited Condensed Consolidated Statements of Cash Flows, and (iv) Notes to Condensed Consolidated Financial Statements, tagged from Level I to IV.

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SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

INTUITIVE SURGICAL, INC.
(Registrant)
By:	/s/ MARSHALL L. MOHR
Marshall L. Mohr
Senior Vice President and Chief Financial Officer (Principal Financial Officer and duly authorized signatory)

Date: October 19, 2011

32

EX-31.1

Exhibit 31.1

Certification of Chief Executive Officer

Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, Gary S. Guthart, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Intuitive Surgical, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: October 19, 2011

/s/ Gary S. Guthart

Gary S. Guthart

President and Chief Executive Officer

(Principal Executive Officer)

EX-31.2

Exhibit 31.2

Certification of Chief Financial Officer

Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, Marshall L. Mohr, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Intuitive Surgical, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal controls over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: October 19, 2011

/s/ Marshall L. Mohr

Marshall L. Mohr

Senior Vice President and Chief Financial Officer

(Principal Financial Officer)

EX-32.1

Exhibit 32.1

Certification of Chief Executive Officer

Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

Pursuant to 18 U.S.C. § 1350, as created by Section 906 of the Sarbanes-Oxley Act of 2002, the undersigned officer of Intuitive Surgical, Inc. (the “Company”) hereby certifies, to such officer’s knowledge, that:

(i) the accompanying Quarterly Report on Form 10-Q of the Company for the quarterly period ended September 30, 2011 (the “Report”) fully complies with the requirements of Section 13(a) or Section 15(d), as applicable, of the Securities Exchange Act of 1934, as amended; and

(ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated: October 19, 2011

/s/ Gary S. Guthart

Gary S. Guthart

President and Chief Executive Officer

(Principal Executive Officer)

EX-32.2

Exhibit 32.2

Certification of Chief Financial Officer

Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

Pursuant to 18 U.S.C. § 1350, as created by Section 906 of the Sarbanes-Oxley Act of 2002, the undersigned officer of Intuitive Surgical, Inc. (the “Company”) hereby certifies, to such officer’s knowledge, that:

(i) the accompanying Quarterly Report on Form 10-Q of the Company for the quarterly period ended September 30, 2011 (the “Report”) fully complies with the requirements of Section 13(a) or Section 15(d), as applicable, of the Securities Exchange Act of 1934, as amended; and

(ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated: October 19, 2011

/s/ Marshall L. Mohr

Marshall L. Mohr

Senior Vice President and Chief Financial Officer

(Principal Financial Officer)

XML

Condensed Consolidated Balance Sheets (Parenthetical) In Millions, except Per Share data	Sep. 30, 2011 USD ($)	Dec. 31, 2010 USD ($)
Condensed Consolidated Balance Sheets [Abstract]
Preferred stock, shares authorized	2.5	2.5
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, shares authorized	100.0	100.0
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares issued	39.0	38.9
Common stock, shares outstanding	39.0	38.9

XML

Condensed Consolidated Statements Of Income (USD $) In Millions, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Revenue:
Product	$ 374.9	$ 287.1	$ 1,057.5	$ 860.4
Service	71.8	57.3	203.0	163.3
Total revenue	446.7	344.4	1,260.5	1,023.7
Cost of revenue:
Product	96.2	72.8	274.5	213.5
Service	25.0	21.0	75.1	62.3
Total cost of revenue	121.2	93.8	349.6	275.8
Gross profit	325.5	250.6	910.9	747.9
Operating expenses:
Selling, general, and administrative	111.2	91.6	316.8	263.0
Research and development	35.4	26.9	98.8	83.4
Total operating expenses	146.6	118.5	415.6	346.4
Income from operations	178.9	132.1	495.3	401.5
Interest and other income, net	1.9	5.0	11.3	13.6
Income before taxes	180.8	137.1	506.6	415.1
Income tax expense	58.4	50.5	162.7	154.5
Net income	$ 122.4	$ 86.6	$ 343.9	$ 260.6
Earnings per share:
Basic	$ 3.13	$ 2.20	$ 8.77	$ 6.65
Diluted	$ 3.05	$ 2.14	$ 8.55	$ 6.45
Shares used in computing earnings per share:
Basic	39.1	39.4	39.2	39.2
Diluted	40.1	40.5	40.2	40.4

XML

Cash, Cash Equivalents And Investments (Details) (USD $) In Millions	9 Months Ended
	Sep. 30, 2011	Dec. 31, 2010	Sep. 30, 2010	Dec. 31, 2009
Cash, amortized cost	$ 70.0	$ 20.1
Cash, gross unrealized gains		0
Cash, gross unrealized losses		0
Cash, fair value	70.0	20.1
Cash equivalents, amortized cost	228.2	259.7
Cash equivalents, gross unrealized gains		0
Cash equivalents, gross unrealized losses		0
Cash equivalents, fair value	228.2	259.7
Total cash and cash equivalents, amortized cost	298.2	279.8
Total cash and cash equivalents, gross unrealized gains		0
Total cash and cash equivalents, gross unrealized losses		0
Total cash and cash equivalents, fair value	298.2	279.8	382.0	221.4
Amortized cost	1,815.8
Available-for-sale investments, fair value	1,817.3	1,588.8
Available-for-sale investments, fair value	1,816.5
Total cash, cash equivalents and available-for-sale investments, amortized cost	1,886.3	1,610.0
Total cash, cash equivalents and available-for-sale investments, total gross unrealized gains	6.4	4.6
Total cash, cash equivalents and available-for-sale investments, total gross unrealized losses	(5.4)	(5.7)
Total cash, cash equivalents and available-for-sale investments, fair value	1,887.3	1,608.9
Accumulated net unrealized gains on available-for-sale securities, net of tax	0.9	1.3
Realized gains recognized on the sale of investments	2.5
Short-Term [Member]
Available-for-sale investments, amortized cost	611.4	628.6
Available-for-sale investments, gross unrealized gains	1.1	2.0
Available-for-sale investments, gross unrealized losses	(0.1)	0
Available-for-sale investments, fair value	612.4	630.6
Short-Term [Member] | Commercial Paper [Member]
Available-for-sale investments, amortized cost	94.2	79.0
Available-for-sale investments, gross unrealized gains	0	0
Available-for-sale investments, gross unrealized losses	0	0
Available-for-sale investments, fair value	94.2	79.0
Short-Term [Member] | Municipal Notes [Member]
Available-for-sale investments, amortized cost	96.4	111.8
Available-for-sale investments, gross unrealized gains	0.2	0.4
Available-for-sale investments, gross unrealized losses	0	0
Available-for-sale investments, fair value	96.6	112.2
Short-Term [Member] | U.S. Corporate Debt & Equity Securities [Member]
Available-for-sale investments, amortized cost	164.7
Available-for-sale investments, gross unrealized gains	0.6
Available-for-sale investments, gross unrealized losses	(0.1)
Available-for-sale investments, fair value	165.2
Short-Term [Member] | U.S. Corporate Debt [Member]
Available-for-sale investments, amortized cost		174.1
Available-for-sale investments, gross unrealized gains		1.3
Available-for-sale investments, gross unrealized losses		0
Available-for-sale investments, fair value		175.4
Short-Term [Member] | U.S. Treasuries [Member]
Available-for-sale investments, amortized cost	116.7	76.3
Available-for-sale investments, gross unrealized gains	0.1	0
Available-for-sale investments, gross unrealized losses	0	0
Available-for-sale investments, fair value	116.8	76.3
Short-Term [Member] | U.S. Government Agencies [Member]
Available-for-sale investments, amortized cost	138.9	187.4
Available-for-sale investments, gross unrealized gains	0.2	0.3
Available-for-sale investments, gross unrealized losses	0	0
Available-for-sale investments, fair value	139.1	187.7
Short-Term [Member] | Non-U.S. Government Securities [Member]
Available-for-sale investments, amortized cost	0.5
Available-for-sale investments, gross unrealized gains	0
Available-for-sale investments, gross unrealized losses	0
Available-for-sale investments, fair value	0.5
Long-Term [Member]
Available-for-sale investments, amortized cost	976.7	701.6
Available-for-sale investments, gross unrealized gains	5.3	2.6
Available-for-sale investments, gross unrealized losses	(5.3)	(5.7)
Available-for-sale investments, fair value	976.7	698.5
Long-Term [Member] | Municipal Notes [Member]
Available-for-sale investments, amortized cost	187.1	143.4
Available-for-sale investments, gross unrealized gains	1.0	0.3
Available-for-sale investments, gross unrealized losses	(3.9)	(4.3)
Available-for-sale investments, fair value	184.2	139.4
Long-Term [Member] | U.S. Corporate Debt [Member]
Available-for-sale investments, amortized cost	415.3	300.4
Available-for-sale investments, gross unrealized gains	2.4	1.8
Available-for-sale investments, gross unrealized losses	(1.3)	(0.9)
Available-for-sale investments, fair value	416.4	301.3
Long-Term [Member] | U.S. Treasuries [Member]
Available-for-sale investments, amortized cost	31.8	39.9
Available-for-sale investments, gross unrealized gains	0.1	0.1
Available-for-sale investments, gross unrealized losses	0	0
Available-for-sale investments, fair value	31.9	40.0
Long-Term [Member] | U.S. Government Agencies [Member]
Available-for-sale investments, amortized cost	302.7	196.7
Available-for-sale investments, gross unrealized gains	1.4	0.3
Available-for-sale investments, gross unrealized losses	(0.1)	(0.4)
Available-for-sale investments, fair value	304.0	196.6
Long-Term [Member] | Non-U.S. Government Securities [Member]
Available-for-sale investments, amortized cost	39.8	21.2
Available-for-sale investments, gross unrealized gains	0.4	0.1
Available-for-sale investments, gross unrealized losses	0	(0.1)
Available-for-sale investments, fair value	40.2	21.2
Mature In Less Than One Year [Member]
Amortized cost	839.1
Available-for-sale investments, fair value	839.8
Mature In One To Five Years [Member]
Amortized cost	954.2
Available-for-sale investments, fair value	958.0
Mature In More Than Five Years [Member]
Amortized cost	22.5
Available-for-sale investments, fair value	18.7
Commercial Paper [Member]
Available-for-sale investments, fair value	100.6	122.5
Municipal Notes [Member]
Available-for-sale investments, fair value	280.8	251.7
U.S. Corporate Debt & Equity Securities [Member]
Available-for-sale investments, fair value	581.6
U.S. Corporate Debt [Member]
Available-for-sale investments, fair value		476.8
U.S. Treasuries [Member]
Available-for-sale investments, fair value	148.8	116.3
U.S. Government Agencies [Member]
Available-for-sale investments, fair value	447.0	389.2
Non-U.S. Government Securities [Member]
Available-for-sale investments, fair value	$ 40.7	$ 21.1

XML

Document And Entity Information	9 Months Ended
	Sep. 30, 2011	Oct. 13, 2011
Document And Entity Information [Abstract]
Entity Registrant Name	INTUITIVE SURGICAL INC
Entity Central Index Key	0001035267
Current Fiscal Year End Date	--12-31
Trading Symbol	ISRG
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		38,994,233
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2011
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	Q3

XML

Balance Sheet Details (Details) (USD $) In Millions	9 Months Ended
	Sep. 30, 2011	Dec. 31, 2010
Balance Sheet Details [Abstract]
Raw materials	$ 29.8	$ 25.6
Work-in-process	3.0	2.5
Finished goods	75.8	58.7
Total	108.6	86.8
Purchase of land and buildings	$ 33.1

XML

Stockholders' Equity

9 Months Ended

Sep. 30, 2011

Stockholders' Equity [Abstract]

Stockholders' Equity

NOTE 7. STOCKHOLDERS' EQUITY

Stock Repurchase Program

On February 3, 2011, the Company's Board of Directors (the "Board") increased its authorization for stock repurchases to $400 million. The following table provides the stock repurchase activities during the three and nine months ended September 30, 2011 and 2010 (in millions, except per share amounts):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2011		2010		2011		2010
Shares repurchased		0.5		0.2		1.0		0.2
Average price per share	$	344.36	$	277.92	$	344.72	$	277.92
Value of shares repurchased	$	181.1	$	58.9	$	331.8	$	58.9

As of September 30, 2011, the remaining authorized amount of stock repurchases under the Board-authorized stock repurchase program was approximately $68.2 million.

Comprehensive Income

The components of comprehensive income, net of tax, are as follows (in millions):

	Three Months  Ended September 30,						Nine Months  Ended September 30,
	2011			2010			2011			2010
Net income	$	122.4		$	86.6		$	343.9		$	260.6
Foreign currency translation gains (losses)		(0.3	)		0.4			0.0			(0.2	)
Unrealized gains (losses) on derivative instruments, net of tax:
Unrealized gains (losses) on derivative instruments		1.6			(2.5	)		(0.1	)		0.6
Reclassification adjustment for (gains) losses on derivative instruments recognized during the period		(1.2	)		0.9			0.4			(2.2	)
Unrealized gains (losses) on available-for-sale securities, net of tax		(1.2	)		1.2			(0.4	)		1.2
Total other comprehensive income	$	121.3		$	86.6		$	343.8		$	260.0

The components of accumulated other comprehensive income are as follows (in millions):

	September 30, 2011		December 31, 2010
Foreign currency translation gains	$	0.1	$	0.1
Accumulated net unrealized gains on derivatives, net of tax		0.5		0.2
Accumulated net unrealized gains on available-for-sale securities, net of tax		0.9		1.3
Total accumulated other comprehensive income	$	1.5	$	1.6

XML

Stockholders' Equity (Narrative) (Details) (USD $) In Millions	Sep. 30, 2011	Feb. 28, 2011
Stockholders' Equity [Abstract]
Increase in share repurchase authorization		$ 400
Remaining authorized amount of stock repurchases	$ 68.2

XML

Fair Value Measurements (Schedule Of Company's Fair Value Hierarchy) (Details) (USD $) In Millions	Sep. 30, 2011	Dec. 31, 2010
Available-for-sale securities, fair value	$ 1,817.3	$ 1,588.8
Foreign currency derivatives, assets	1.6	0.2
Total assets measured at fair value	1,818.9	1,589.0
Foreign currency derivatives, liabilities		2.1
Total liabilities measured at fair value		2.1
Money Market Funds [Member]
Available-for-sale securities, fair value	217.8	211.2
Money Market Funds [Member] | Level 1 [Member]
Available-for-sale securities, fair value	217.8	211.2
Money Market Funds [Member] | Level 2 [Member]
Available-for-sale securities, fair value	0	0
Money Market Funds [Member] | Level 3 [Member]
Available-for-sale securities, fair value	0	0
U.S. Treasuries [Member]
Available-for-sale securities, fair value	148.8	116.3
U.S. Treasuries [Member] | Level 1 [Member]
Available-for-sale securities, fair value	148.8	116.3
U.S. Treasuries [Member] | Level 2 [Member]
Available-for-sale securities, fair value	0	0
U.S. Treasuries [Member] | Level 3 [Member]
Available-for-sale securities, fair value	0	0
Commercial Paper [Member]
Available-for-sale securities, fair value	100.6	122.5
Commercial Paper [Member] | Level 1 [Member]
Available-for-sale securities, fair value	0	0
Commercial Paper [Member] | Level 2 [Member]
Available-for-sale securities, fair value	100.6	122.5
Commercial Paper [Member] | Level 3 [Member]
Available-for-sale securities, fair value	0	0
U.S. Corporate Debt & Equity Securities [Member]
Available-for-sale securities, fair value	581.6
U.S. Corporate Debt & Equity Securities [Member] | Level 1 [Member]
Available-for-sale securities, fair value	0.8
U.S. Corporate Debt & Equity Securities [Member] | Level 2 [Member]
Available-for-sale securities, fair value	580.8
U.S. Corporate Debt & Equity Securities [Member] | Level 3 [Member]
Available-for-sale securities, fair value	0
U.S. Corporate Debt [Member]
Available-for-sale securities, fair value		476.8
U.S. Corporate Debt [Member] | Level 1 [Member]
Available-for-sale securities, fair value		0
U.S. Corporate Debt [Member] | Level 2 [Member]
Available-for-sale securities, fair value		476.8
U.S. Corporate Debt [Member] | Level 3 [Member]
Available-for-sale securities, fair value		0
U.S. Government Agencies [Member]
Available-for-sale securities, fair value	447.0	389.2
U.S. Government Agencies [Member] | Level 1 [Member]
Available-for-sale securities, fair value	0	0
U.S. Government Agencies [Member] | Level 2 [Member]
Available-for-sale securities, fair value	447.0	389.2
U.S. Government Agencies [Member] | Level 3 [Member]
Available-for-sale securities, fair value	0	0
Non-U.S. Government Securities [Member]
Available-for-sale securities, fair value	40.7	21.1
Non-U.S. Government Securities [Member] | Level 1 [Member]
Available-for-sale securities, fair value	0	0
Non-U.S. Government Securities [Member] | Level 2 [Member]
Available-for-sale securities, fair value	40.7	21.1
Non-U.S. Government Securities [Member] | Level 3 [Member]
Available-for-sale securities, fair value	0	0
Municipal Notes [Member]
Available-for-sale securities, fair value	280.8	251.7
Municipal Notes [Member] | Level 1 [Member]
Available-for-sale securities, fair value	0	0
Municipal Notes [Member] | Level 2 [Member]
Available-for-sale securities, fair value	262.1	233.1
Municipal Notes [Member] | Level 3 [Member]
Available-for-sale securities, fair value	18.7	18.6
Level 1 [Member]
Available-for-sale securities, fair value	367.4	327.5
Foreign currency derivatives, assets	0	0
Total assets measured at fair value	367.4	327.5
Foreign currency derivatives, liabilities		0
Total liabilities measured at fair value		0
Level 2 [Member]
Available-for-sale securities, fair value	1,431.2	1,242.7
Foreign currency derivatives, assets	1.6	0.2
Total assets measured at fair value	1,432.8	1,242.9
Foreign currency derivatives, liabilities		2.1
Total liabilities measured at fair value		2.1
Level 3 [Member]
Available-for-sale securities, fair value	18.7	18.6
Foreign currency derivatives, assets	0	0
Total assets measured at fair value	18.7	18.6
Foreign currency derivatives, liabilities		0
Total liabilities measured at fair value		$ 0

XML

Cash, Cash Equivalents And Investments (Tables)

9 Months Ended

12 Months Ended

Sep. 30, 2011

Dec. 31, 2010

Cash, Cash Equivalents And Investments [Abstract]

Summary Of Company's Cash, Cash Equivalents And Investments

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
September 30, 2011
Cash and cash equivalents:
Cash	$	70.0	$	—	$	—		$	70.0
Cash equivalents		228.2		—		—			228.2
Total cash and cash equivalents	$	298.2	$	—	$	—		$	298.2
Available for sale investments:
Short-term
Commercial paper	$	94.2	$	0.0	$	0.0		$	94.2
Municipal notes		96.4		0.2		0.0			96.6
U.S. corporate debt & equity securities		164.7		0.6		(0.1	)		165.2
U.S. treasuries		116.7		0.1		0.0			116.8
U.S. government agencies		138.9		0.2		0.0			139.1
Non-U.S. government securities		0.5		0.0		0.0			0.5
Total short-term	$	611.4	$	1.1	$	(0.1	)	$	612.4
Long-term
Municipal notes	$	187.1	$	1.0	$	(3.9	)	$	184.2
U.S. corporate debt		415.3		2.4		(1.3	)		416.4
U.S. treasuries		31.8		0.1		0.0			31.9
U.S. government agencies		302.7		1.4		(0.1	)		304.0
Non-U.S. government securities		39.8		0.4		0.0			40.2
Total long-term	$	976.7	$	5.3	$	(5.3	)	$	976.7
Total cash, cash equivalents and available for sale investments:	$	1,886.3	$	6.4	$	(5.4	)	$	1,887.3

			Gross		Gross
	Amortized		Unrealized		Unrealized			Fair
December 31, 2010	Cost		Gains		Losses			Value
Cash and cash equivalents:
Cash	$	20.1	$	0.0	$	0.0		$	20.1
Cash equivalents		259.7		0.0		0.0			259.7
Total cash and cash equivalents	$	279.8	$	0.0	$	0.0		$	279.8
Available for sale investments:
Short-term
Commercial paper	$	79.0	$	0.0	$	0.0		$	79.0
Municipal notes		111.8		0.4		0.0			112.2
U.S. corporate debt		174.1		1.3		0.0			175.4
U.S. treasuries		76.3		0.0		0.0			76.3
U.S. government agencies		187.4		0.3		0.0			187.7
Total short-term	$	628.6	$	2.0	$	0.0		$	630.6
Long-term
Municipal notes	$	143.4	$	0.3	$	(4.3	)	$	139.4
U.S. corporate debt		300.4		1.8		(0.9	)		301.3
U.S. treasuries		39.9		0.1		0.0			40.0
U.S. government agencies		196.7		0.3		(0.4	)		196.6
Non-U.S. government securities		21.2		0.1		(0.1	)		21.2
Total long-term	$	701.6	$	2.6	$	(5.7	)	$	698.5
Total cash, cash equivalents and available for sale investments	$	1,610.0	$	4.6	$	(5.7	)	$	1,608.9

Schedule Of Cash Equivalents And Available-For-Sale Securities By Maturity

	Amortized Cost		Fair Value
Mature in less than one year	$	839.1	$	839.8
Mature in one to five years		954.2		958.0
Mature in more than five years		22.5		18.7
Total	$	1,815.8	$	1,816.5

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Cash, Cash Equivalents And Investments

9 Months Ended

Sep. 30, 2011

Cash, Cash Equivalents And Investments [Abstract]

Cash, Cash Equivalents And Investments

NOTE 3. CASH, CASH EQUIVALENTS AND INVESTMENTS

The following tables summarize the Company's cash, cash equivalents and investments as of September 30, 2011 and December 31, 2010 (in millions):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
September 30, 2011
Cash and cash equivalents:
Cash	$	70.0	$	—	$	—		$	70.0
Cash equivalents		228.2		—		—			228.2
Total cash and cash equivalents	$	298.2	$	—	$	—		$	298.2
Available for sale investments:
Short-term
Commercial paper	$	94.2	$	0.0	$	0.0		$	94.2
Municipal notes		96.4		0.2		0.0			96.6
U.S. corporate debt & equity securities		164.7		0.6		(0.1	)		165.2
U.S. treasuries		116.7		0.1		0.0			116.8
U.S. government agencies		138.9		0.2		0.0			139.1
Non-U.S. government securities		0.5		0.0		0.0			0.5
Total short-term	$	611.4	$	1.1	$	(0.1	)	$	612.4
Long-term
Municipal notes	$	187.1	$	1.0	$	(3.9	)	$	184.2
U.S. corporate debt		415.3		2.4		(1.3	)		416.4
U.S. treasuries		31.8		0.1		0.0			31.9
U.S. government agencies		302.7		1.4		(0.1	)		304.0
Non-U.S. government securities		39.8		0.4		0.0			40.2
Total long-term	$	976.7	$	5.3	$	(5.3	)	$	976.7
Total cash, cash equivalents and available for sale investments:	$	1,886.3	$	6.4	$	(5.4	)	$	1,887.3

			Gross		Gross
	Amortized		Unrealized		Unrealized			Fair
December 31, 2010	Cost		Gains		Losses			Value
Cash and cash equivalents:
Cash	$	20.1	$	0.0	$	0.0		$	20.1
Cash equivalents		259.7		0.0		0.0			259.7
Total cash and cash equivalents	$	279.8	$	0.0	$	0.0		$	279.8
Available for sale investments:
Short-term
Commercial paper	$	79.0	$	0.0	$	0.0		$	79.0
Municipal notes		111.8		0.4		0.0			112.2
U.S. corporate debt		174.1		1.3		0.0			175.4
U.S. treasuries		76.3		0.0		0.0			76.3
U.S. government agencies		187.4		0.3		0.0			187.7
Total short-term	$	628.6	$	2.0	$	0.0		$	630.6
Long-term
Municipal notes	$	143.4	$	0.3	$	(4.3	)	$	139.4
U.S. corporate debt		300.4		1.8		(0.9	)		301.3
U.S. treasuries		39.9		0.1		0.0			40.0
U.S. government agencies		196.7		0.3		(0.4	)		196.6
Non-U.S. government securities		21.2		0.1		(0.1	)		21.2
Total long-term	$	701.6	$	2.6	$	(5.7	)	$	698.5
Total cash, cash equivalents and available for sale investments	$	1,610.0	$	4.6	$	(5.7	)	$	1,608.9

The following table summarizes the maturities of the Company's cash equivalents and available-for-sale investments, excluding equity securities, at September 30, 2011 (in millions):

	Amortized Cost		Fair Value
Mature in less than one year	$	839.1	$	839.8
Mature in one to five years		954.2		958.0
Mature in more than five years		22.5		18.7
Total	$	1,815.8	$	1,816.5

During the nine months ended September 30, 2011, realized gains on the sale of investments were approximately $2.5 million. Realized gains or losses recognized on the sale of investments for the three months ended September 30, 2011 and three and nine months ended September 30, 2010 were not significant. As of September 30, 2011 and December 31, 2010, net unrealized gains on investments, net of tax, of $0.9 million and $1.3 million, respectively, were included in accumulated other comprehensive income in the accompanying unaudited Condensed Consolidated Balance Sheets. At September 30, 2011, the Company evaluated its gross unrealized losses, the majority of which were from auction-rate securities (ARS). The Company determined these unrealized losses to be temporary, because the Company does not intend to sell the security and it is not more likely than not that the Company will be required to sell these securities before the recovery of their amortized cost basis.

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Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010
Income Taxes [Abstract]
Income tax expense	$ 58.4	$ 50.5	$ 162.7	$ 154.5
Tax expense, percentage of pre-tax income	32.30%	36.80%	32.10%	37.20%
Federal statutory tax rate	35.00%		35.00%
Total gross unrecognized tax benefits	91.5		91.5		78.9
Unrecognized tax benefits, period increase			12.6
Unrecognized tax benefits that would reduce company's effective tax rate	87.2		87.2		74.7
Gross interest related to unrecognized tax benefits accrued	$ 7.2		$ 7.2		$ 5.5

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Income Taxes

9 Months Ended

Sep. 30, 2011

Income Taxes [Abstract]

Income Taxes

NOTE 9. INCOME TAXES

Income tax expense for the three months ended September 30, 2011 was $58.4 million, or 32.3% of pre-tax income, compared with

$50.5 million, or 36.8% of pre-tax income for the three months ended September 30, 2010. Income tax expense for the nine months ended September 30, 2011 was $162.7 million, or 32.1% of pre-tax income, compared with $154.5 million, or 37.2% of pre-tax income for the nine months ended September 30, 2010. The effective tax rate for the three and nine months ended September 30, 2011 differs from the U.S. federal statutory rate of 35% primarily due to the effect of income earned by certain of the Company's overseas entities being taxed at rates lower than the federal statutory rate and research & development credits ("R&D credits"), partially offset by state income taxes and non-deductible stock option expenses. The Company intends to indefinitely reinvest the foreign earnings outside the United States. The effective tax rate for the three and nine months ended September 30, 2010 differs from the federal statutory rate primarily due to state income taxes and non-deductible stock option expenses, partially offset by the effect of income earned by certain of the Company's overseas entities being taxed at rates lower than the federal statutory rate. The decrease in effective tax rates for the three and nine months ended September 30, 2011 compared with the three and nine months ended September 30, 2010 is primarily related to R&D credits, the decrease in California tax after the adoption of single sales factor apportionment effective January 1, 2011, and an increase in foreign earnings taxed at lower rates relative to domestic income.

As of September 30, 2011, the Company has total gross unrecognized tax benefits of approximately $91.5 million compared with approximately $78.9 million as of December 31, 2010, representing an increase of approximately $12.6 million for the nine months ended September 30, 2011. Of the total gross unrecognized tax benefits, $87.2 million and $74.7 million as of September 30, 2011 and December 31, 2010, respectively, if recognized, would reduce the effective tax rate in the period of recognition. Gross interest related to unrecognized tax benefit accrued was approximately $7.2 million and $5.5 million, respectively, as of September 30, 2011 and December 31, 2010.

The Company files federal, state and foreign income tax returns in many jurisdictions in the United States and abroad. For U.S. federal and California income tax purposes, the statutes of limitations currently remain open for all years since inception due to utilization of net operating losses and R&D credits generated in prior years. Certain of the Company's unrecognized tax benefits could reverse based on the normal expiration of various statutes of limitations, which could affect the Company's effective tax rate in the period in which they reverse.

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Balance Sheet Details (Tables)

9 Months Ended

Sep. 30, 2011

Balance Sheet Details [Abstract]

Inventory Selected Balance Sheet Items

	September 30, 2011		December 31, 2010
Inventory
Raw materials	$	29.8	$	25.6
Work-in-process		3.0		2.5
Finished goods		75.8		58.7
Total	$	108.6	$	86.8

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Net Income Per Share

9 Months Ended

Sep. 30, 2011

Net Income Per Share [Abstract]

Net Income Per Share

NOTE 10. NET INCOME PER SHARE

The following table presents the computation of basic and diluted net income per share (in millions, except per share data):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2011		2010		2011		2010
Net income	$	122.4	$	86.6	$	343.9	$	260.6
Basic:
Weighted-average shares outstanding		39.1		39.4		39.2		39.2
Basic net income per share	$	3.13	$	2.20	$	8.77	$	6.65
Diluted:
Weighted-average shares outstanding used in basic calculation		39.1		39.4		39.2		39.2
Add common stock equivalents		1.0		1.1		1.0		1.2
Weighted-average shares used in computing diluted net income per share		40.1		40.5		40.2		40.4
Diluted net income per share	$	3.05	$	2.14	$	8.55	$	6.45

Employee stock options to purchase approximately 2.2 million and 1.7 million weighted shares for the three months ended September 30, 2011 and 2010, respectively, and 2.2 million and 1.2 million weighted shares for the nine months ended September 30, 2011 and 2010, respectively, were outstanding, but were not included in the computation of diluted net income per share because the effect of including such shares would have been antidilutive in the periods presented.

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Stock-Based Compensation (Summary Of Stock Option Activity Under All Stock Plans) (Details) In Millions, except Per Share data	9 Months Ended
	Sep. 30, 2011 USD ($)	Sep. 30, 2011
Stock-Based Compensation [Abstract]
Beginning balance, Shares Available for Grant	1.4	1.6
Options authorized, Shares Available for Grant	1.4
Options granted, Shares Available for Grant	(1.3)
Options forfeited/expired, Shares Available for Grant	0.1
Ending balance, Shares Available for Grant		1.6
Beginning balance, Number of Options Outstanding	4.8	5.0
Options granted, Number Outstanding	1.3
Options exercised, Number Outstanding	(1.0)
Options forfeited/expired, Number Outstanding	(0.1)
Ending balance, Number of Options Outstanding		5.0
Beginning balance, Number of Options Outstanding, Weighted Average Exercise Price Per Share	$ 209.03
Options granted, Weighted Average Exercise Price Per Share	$ 341.55
Options exercised, Weighted Average Exercise Price Per Share	$ 167.32
Options forfeited/expired, Weighted Average Exercise Price Per Share	$ 280.24
Ending balance, Number of Options Outstanding, Weighted Average Exercise Price Per Share	$ 249.57

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Stock-Based Compensation

9 Months Ended

Sep. 30, 2011

Stock-Based Compensation [Abstract]

Stock-Based Compensation

NOTE 8. STOCK-BASED COMPENSATION

Stock Option Plans

2010 Incentive Award Plan

In April 2011, the Company's stockholders approved the amended and restated 2010 Incentive Award Plan ("2010 Plan") to provide for an increase in the number of shares of common stock authorized for issuance pursuant to awards granted under the 2010 Plan from 1,250,000 to 2,450,000.

2009 Employment Commencement Incentive Plan

In July 2011, the Board amended and restated the 2009 Employment Commencement Incentive Plan ("2009 Plan") to provide for an increase in the number of shares of common stock authorized for issuance pursuant to awards granted under the 2009 Plan from 350,000 to 530,000.

A summary of stock option activity under all stock plans for the nine months ended September 30, 2011 is presented as follows (in millions, except per share amounts):

				Stock Options Outstanding
	Shares Available for Grant			Number Outstanding			Weighted Average Exercise Price Per Share
Balance at December 31, 2010		1.4			4.8		$	209.03
Options authorized		1.4
Options granted		(1.3	)		1.3			341.55
Options exercised					(1.0	)		167.32
Options forfeited/expired		0.1			(0.1	)		280.24
Balance at September 30, 2011		1.6			5.0		$	249.57

As of September 30, 2011, 2.5 million shares of options were exercisable at a weighted-average price of $207.31 per share.

Employee Stock Purchase Plan

Under the Employee Stock Purchase Plan ("ESPP"), employees purchased less than 0.1 million shares for $8.1 million and 0.1 million shares for $6.6 million during the three months ended September 30, 2011 and 2010, respectively and 0.1 million shares for $18.5 million and 0.1 million shares for $14.3 million during the nine months ended September 30, 2011 and 2010, respectively.

Stock-based Compensation

The following table summarizes stock-based compensation charges (in millions):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2011		2010		2011		2010
Cost of sales—products	$	3.2	$	2.5	$	9.2	$	7.0
Cost of sales—services		2.9		2.2		8.2		6.3
Total cost of sales		6.1		4.7		17.4		13.3
Selling, general and administrative		21.4		19.8		63.0		57.6
Research and development		7.4		5.9		21.4		16.6
Stock-based compensation expense before income taxes		34.9		30.4		101.8		87.5
Income tax effect		10.4		9.1		32.1		25.0
Stock-based compensation expense after income taxes	$	24.5	$	21.3	$	69.7	$	62.5

The fair value of each option grant and the fair value of the option component of the ESPP shares were estimated at the date of grant using the Black-Scholes option pricing model with the following weighted average assumptions, assuming no expected dividends:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2011			2010			2011			2010
Stock Options
Average risk free interest rate		1.13	%		1.61	%		2.24	%		2.28	%
Average expected term (years)		4.5			4.8			4.8			4.8
Average expected volatility		35	%		44	%		35	%		35	%
Weighted average fair value at grant date	$	115.09		$	121.32		$	114.69		$	112.32
Total stock-based compensation expense (in millions)	$	32.9		$	28.1		$	95.7		$	81.3
ESPP
Average risk free interest rate		0.27	%		0.37	%		0.32	%		0.43	%
Average expected term (years)		1.3			1.3			1.3			1.3
Average expected volatility		31	%		43	%		33	%		39	%
Weighted average fair value at grant date	$	112.75		$	110.90		$	99.94		$	106.72
Total stock-based compensation expense (in millions)	$	2.0		$	2.3		$	6.1		$	6.2

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Description Of Business

9 Months Ended

Sep. 30, 2011

Description Of Business [Abstract]

Description Of Business

NOTE 1. DESCRIPTION OF BUSINESS

Intuitive Surgical, Inc. designs, manufactures, and markets the da Vinci Surgical System, which is an advanced surgical system that the Company believes represents a new generation of surgery. The da Vinci Surgical System consists of a surgeon's console or consoles, a patient-side cart, a high performance vision system and proprietary "wristed" instruments. The da Vinci Surgical System translates the surgeon's natural hand movements on instrument controls at the console into corresponding micro-movements of instruments positioned inside the patient through small puncture incisions, or ports. The Company markets its products through sales representatives in the United States, and through a combination of sales representatives and distributors in its international markets.

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Fair Value Measurements

9 Months Ended

Sep. 30, 2011

Fair Value Measurements [Abstract]

Fair Value Measurements

NOTE 4. FAIR VALUE MEASUREMENTS

The Company measures certain financial assets , including cash equivalents, available-for-sale securities and foreign currency derivatives at their fair value. The fair value of these financial assets was determined based on three levels of inputs, of which the first two are considered observable and the last unobservable, as follows:

Level 1—Quoted prices in active markets for identical assets or liabilities.

Level 2—Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.

Level 3—Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

The following tables represent the Company's fair value hierarchy for its financial assets and liabilities as of September 30, 2011 and December 31, 2010 (in millions):

	Fair Value Measurements at September 30, 2011 Using
Assets	Level 1		Level 2		Level 3		Total
Available-for-sale securities
Money Market funds	$	217.8	$	0.0	$	0.0	$	217.8
U.S. treasuries		148.8		0.0		0.0		148.8
Commercial paper		0.0		100.6		0.0		100.6
Corporate debt & equity securities		0.8		580.8		0.0		581.6
U.S. government agencies		0.0		447.0		0.0		447.0
Non-U.S. government agencies		0.0		40.7		0.0		40.7
Municipal notes		0.0		262.1		18.7		280.8
Total available-for-sale securities		367.4		1,431.2		18.7		1,817.3
Foreign Currency Derivatives		0.0		1.6		0.0		1.6
Total assets measured at fair value	$	367.4	$	1,432.8	$	18.7	$	1,818.9

	Fair Value Measurements at December 31, 2010 Using
Assets	Level 1		Level 2		Level 3		Total
Available-for-sale securities
Money Market funds	$	211.2	$	0.0	$	0.0	$	211.2
U.S. treasuries		116.3		0.0		0.0		116.3
Commercial paper		0.0		122.5		0.0		122.5
Corporate debt		0.0		476.8		0.0		476.8
U.S. government agencies		0.0		389.2		0.0		389.2
Non-U.S. government securities		0.0		21.1		0.0		21.1
Municipal notes		0.0		233.1		18.6		251.7
Total available-for-sale securities		327.5		1,242.7		18.6		1,588.8
Foreign Currency Derivatives		0.0		0.2		0.0		0.2
Total assets measured at fair value	$	327.5	$	1,242.9	$	18.6	$	1,589.0
Liabilities
Foreign Currency Derivatives	$	0.0	$	2.1	$	0.0	$	2.1
Total liabilities measured at fair value	$	0.0	$	2.1	$	0.0	$	2.1

Level 2 securities are priced using quoted market prices for similar instruments, nonbinding market prices that are corroborated by observable market data, or discounted cash flow techniques. The Company's derivative instruments are primarily classified as Level 2 as they are not actively traded and are valued using pricing models that use observable market inputs. There have been no transfers between Level 1 and Level 2 measurements during the three and nine months ended September 30, 2011. Level 3 assets consist of municipal bonds with an auction reset feature (ARS) whose underlying assets are student loans which are substantially backed by the federal government. Since the auctions for these securities have continued to fail since February 2008, these investments are not currently trading and therefore do not have a readily determinable market value. The Company has valued the ARS using a discounted cash flow model based on Level 3 assumptions, including estimates of, based on data available as of September 30, 2011, interest rates, timing and amount of cash flows, credit and liquidity premiums and expected holding periods of the ARS.

Foreign currency derivative

Cash Flow Hedges

The Company enters into currency forward contracts as cash flow hedges to hedge certain forecasted revenue transactions denominated in currencies other than the U.S. dollar, primarily the Euro and GBP.

As of September 30, 2011 and December 31, 2010, the Company had notional amounts of €6.6 million and €21.0 million, respectively, of outstanding currency forward contracts that were entered into to hedge Euro dominated sales. The net gains (losses) reclassified to hedged revenue related to revenue transactions for the three and nine months ended September 30, 2011 and 2010 were not significant.

Other Derivatives Not Designated as Hedging Instruments

Other derivatives not designated as hedging instruments consist primarily of forward contracts that the Company uses to hedge intercompany balances and other monetary assets or liabilities denominated in currencies other than the U.S. dollar, primarily the Euro, the GBP and the Swiss Franc.  

As of September 30, 2011, the Company had notional amounts of €23.9 million, £1.8 million and CHF 1.7 million outstanding currency forward contracts that were entered into to hedge non-functional currency denominated net monetary assets and liabilities, compared to €26.0 million and £2.2 million at December 31, 2010. For the three months ended September 30, 2011 and 2010, the Company had recognized gains (losses) of approximately $0.8 million and $(2.3) million, respectively, in interest and other income, net, related to

derivative instruments used to hedge against balance sheet foreign currency exposures. These were offset by net foreign exchange gains (losses) of approximately $(1.7) million and $2.9 million during the three months ended September 30, 2011 and 2010, respectively, primarily related to the re-measurement of non-functional currency denominated net monetary assets. For the nine months ended September 30, 2011 and 2010, the Company had recognized gains (losses) of approximately $(2.4) million and $2.5 million, respectively, in interest and other income, net, related to derivative instruments used to hedge against balance sheet foreign currency exposures. These were offset by net foreign exchange gains (losses) of approximately $1.5 million and $(1.9) million during the nine months ended September 30, 2011 and 2010, respectively, primarily related to the re-measurement of non-functional currency denominated net monetary assets.

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Stock-Based Compensation (Narrative) (Details) In Millions, except Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011 USD ($)	Sep. 30, 2010 USD ($)	Sep. 30, 2011 USD ($)	Sep. 30, 2010 USD ($)	Sep. 30, 2011	Jul. 31, 2011 Stock Option Plans [Member] New Number Of Shares Authorized [Member]	Apr. 30, 2011 Stock Option Plans [Member] New Number Of Shares Authorized [Member]	Jul. 31, 2011 Stock Option Plans [Member] Old Number Of Shares Authorized [Member]	Apr. 30, 2011 Stock Option Plans [Member] Old Number Of Shares Authorized [Member]
Number of shares of common stock authorized for issuance						530,000	2,450,000	350,000	1,250,000
Options exercisable, number of shares					2,500,000
Options exercisable, weighted-average exercise price per share	$ 207.31		$ 207.31
Employee stock purchase plan, shares issued	100,000	100,000	100,000	100,000
Employee stock purchase plan, value of shares issued	$ 8.1	$ 6.6	$ 18.5	$ 14.3

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Balance Sheet Details

9 Months Ended

Sep. 30, 2011

Balance Sheet Details [Abstract]

Balance Sheet Details

NOTE 5. BALANCE SHEET DETAILS

Inventory (in millions):

	September 30, 2011		December 31, 2010
Inventory
Raw materials	$	29.8	$	25.6
Work-in-process		3.0		2.5
Finished goods		75.8		58.7
Total	$	108.6	$	86.8

Property, plant and equipment, net (in millions):

During the nine month period ended September 30, 2011, the Company purchased land and buildings in Sunnyvale, California for approximately $33.1 million.

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Stockholders' Equity (Schedule Of Stock Repurchase Activities) (Details) (USD $) In Millions, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Stockholders' Equity [Abstract]
Shares repurchased	0.5	0.2	1.0	0.2
Average price per share	$ 344.36	$ 277.92	$ 344.72	$ 277.92
Value of shares repurchased	$ 181.1	$ 58.9	$ 331.8	$ 58.9

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Stock-Based Compensation (Summary Of Stock-Based Compensation Charges) (Details) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Cost Of Sales-Products [Member]
Total stock-based compensation charge	$ 3.2	$ 2.5	$ 9.2	$ 7.0
Cost Of Sales-Services [Member]
Total stock-based compensation charge	2.9	2.2	8.2	6.3
Total Cost Of Sales [Member]
Total stock-based compensation charge	6.1	4.7	17.4	13.3
Selling, General And Administrative [Member]
Total stock-based compensation charge	21.4	19.8	63.0	57.6
Research And Development [Member]
Total stock-based compensation charge	7.4	5.9	21.4	16.6
Stock-Based Compensation Expense Before Income Taxes [Member]
Total stock-based compensation charge	34.9	30.4	101.8	87.5
Income Tax Effect [Member]
Total stock-based compensation charge	10.4	9.1	32.1	25.0
Stock-Based Compensation Expense After Income Taxes [Member]
Total stock-based compensation charge	$ 24.5	$ 21.3	$ 69.7	$ 62.5

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Stockholders' Equity (Components Of Accumulated Other Comprehensive Income) (Details) (USD $) In Millions	Sep. 30, 2011	Dec. 31, 2010
Stockholders' Equity [Abstract]
Foreign currency translation gains	$ 0.1	$ 0.1
Accumulated net unrealized gains on derivatives, net of tax	0.5	0.2
Accumulated net unrealized gains on available-for-sale securities, net of tax	0.9	1.3
Total accumulated other comprehensive income	$ 1.5	$ 1.6

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Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2011

Fair Value Measurements [Abstract]

Schedule Of Company's Fair Value Hierarchy

	Fair Value Measurements at September 30, 2011 Using
Assets	Level 1		Level 2		Level 3		Total
Available-for-sale securities
Money Market funds	$	217.8	$	0.0	$	0.0	$	217.8
U.S. treasuries		148.8		0.0		0.0		148.8
Commercial paper		0.0		100.6		0.0		100.6
Corporate debt & equity securities		0.8		580.8		0.0		581.6
U.S. government agencies		0.0		447.0		0.0		447.0
Non-U.S. government agencies		0.0		40.7		0.0		40.7
Municipal notes		0.0		262.1		18.7		280.8
Total available-for-sale securities		367.4		1,431.2		18.7		1,817.3
Foreign Currency Derivatives		0.0		1.6		0.0		1.6
Total assets measured at fair value	$	367.4	$	1,432.8	$	18.7	$	1,818.9

	Fair Value Measurements at December 31, 2010 Using
Assets	Level 1		Level 2		Level 3		Total
Available-for-sale securities
Money Market funds	$	211.2	$	0.0	$	0.0	$	211.2
U.S. treasuries		116.3		0.0		0.0		116.3
Commercial paper		0.0		122.5		0.0		122.5
Corporate debt		0.0		476.8		0.0		476.8
U.S. government agencies		0.0		389.2		0.0		389.2
Non-U.S. government securities		0.0		21.1		0.0		21.1
Municipal notes		0.0		233.1		18.6		251.7
Total available-for-sale securities		327.5		1,242.7		18.6		1,588.8
Foreign Currency Derivatives		0.0		0.2		0.0		0.2
Total assets measured at fair value	$	327.5	$	1,242.9	$	18.6	$	1,589.0
Liabilities
Foreign Currency Derivatives	$	0.0	$	2.1	$	0.0	$	2.1
Total liabilities measured at fair value	$	0.0	$	2.1	$	0.0	$	2.1

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Contingencies

9 Months Ended

Sep. 30, 2011

Contingencies [Abstract]

Contingencies

NOTE 6. CONTINGENCIES

On August 6, 2010, a purported class action lawsuit entitled Perlmutter v. Intuitive Surgical et al., No. CV10-3451, was filed against the Company and seven of the Company's current and former officers and directors in the United States District Court for the Northern District of California. The lawsuit seeks unspecified damages on behalf of a putative class of persons who purchased or otherwise acquired the Company's common stock between February 1, 2008 and January 7, 2009. The complaint alleges that the defendants violated federal securities laws by making allegedly false and misleading statements and omitting certain material facts in the Company's filings with the Securities and Exchange Commission. On February 15, 2011, the Police Retirement System of St. Louis was appointed Lead Plaintiff in the case pursuant to the Private Securities Litigation Reform Act of 1995. An amended complaint was filed on April 15, 2011, making allegations substantially similar to the allegations described above. On May 23, 2011 the Company filed a motion to dismiss the amended complaint. On August 10, 2011 that motion was granted and the action was dismissed; the plaintiffs were given 30 days to file an amended complaint. On September 12, 2011, plaintiffs filed their amended complaint. The allegations contained therein are substantially similar to the allegations in the prior complaint. The Company filed a motion to dismiss the amended complaint. A hearing on that motion will not occur until January 2012. 

On August 19, 2010, an alleged stockholder caused a purported stockholder's derivative lawsuit entitled Himmel v. Smith et al., No. 1-10-CV-180416, to be filed in the Superior Court of California for the County of Santa Clara naming the Company as a nominal defendant, and naming 14 of the Company's current and former officers and directors as defendants. The lawsuit seeks to recover, for the Company's benefit, unspecified damages purportedly sustained by the Company in connection with allegedly misleading statements and/or omissions made in connection with the Company's financial reporting for the period between February 1, 2008 and January 7, 2009. It also seeks a series of changes to the Company's corporate governance policies and an award of attorneys' fees. On September 15, 2010, another purported stockholder filed an essentially identical lawsuit entitled Applbaum v. Guthart et al., No. 1-10-CV-182645, in the same court against 15 of the Company's current and former officers and directors. On October 5, 2010 the court ordered that the two cases be consolidated for all purposes. By agreement with the plaintiffs, formal discovery has been stayed in the case.

Due to the uncertainty surrounding the litigation process, the Company is unable to reasonably estimate the ultimate outcome of the above cases at this time, and therefore no amounts have been accrued related to the outcome of the cases above. Based on currently available information, the Company believes that it has meritorious defenses to the above actions and that the resolution of these cases is not likely to have a material adverse effect on the Company's business, financial position or future results of operations.

The Company is also a party to various other legal actions that arose in the ordinary course of its business. The Company does not believe that any of these other legal actions will have a material adverse impact on its business, financial position or results of operations.

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Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2011

Stock-Based Compensation [Abstract]

Summary Of Stock Option Activity Under All Stock Plans

				Stock Options Outstanding
	Shares Available for Grant			Number Outstanding			Weighted Average Exercise Price Per Share
Balance at December 31, 2010		1.4			4.8		$	209.03
Options authorized		1.4
Options granted		(1.3	)		1.3			341.55
Options exercised					(1.0	)		167.32
Options forfeited/expired		0.1			(0.1	)		280.24
Balance at September 30, 2011		1.6			5.0		$	249.57

Summary Of Stock-Based Compensation Charges

	Three Months Ended September 30,				Nine Months Ended September 30,
	2011		2010		2011		2010
Cost of sales—products	$	3.2	$	2.5	$	9.2	$	7.0
Cost of sales—services		2.9		2.2		8.2		6.3
Total cost of sales		6.1		4.7		17.4		13.3
Selling, general and administrative		21.4		19.8		63.0		57.6
Research and development		7.4		5.9		21.4		16.6
Stock-based compensation expense before income taxes		34.9		30.4		101.8		87.5
Income tax effect		10.4		9.1		32.1		25.0
Stock-based compensation expense after income taxes	$	24.5	$	21.3	$	69.7	$	62.5

Fair Value Of The Option Using Black-Scholes Option Pricing Model, Weighted Average Assumptions

	Three Months Ended September 30,						Nine Months Ended September 30,
	2011			2010			2011			2010
Stock Options
Average risk free interest rate		1.13	%		1.61	%		2.24	%		2.28	%
Average expected term (years)		4.5			4.8			4.8			4.8
Average expected volatility		35	%		44	%		35	%		35	%
Weighted average fair value at grant date	$	115.09		$	121.32		$	114.69		$	112.32
Total stock-based compensation expense (in millions)	$	32.9		$	28.1		$	95.7		$	81.3
ESPP
Average risk free interest rate		0.27	%		0.37	%		0.32	%		0.43	%
Average expected term (years)		1.3			1.3			1.3			1.3
Average expected volatility		31	%		43	%		33	%		39	%
Weighted average fair value at grant date	$	112.75		$	110.90		$	99.94		$	106.72
Total stock-based compensation expense (in millions)	$	2.0		$	2.3		$	6.1		$	6.2

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Stockholders' Equity (Components Of Comprehensive Income, Net Of Tax) (Details) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Stockholders' Equity [Abstract]
Net income	$ 122.4	$ 86.6	$ 343.9	$ 260.6
Foreign currency translation gains (losses)	(0.3)	0.4	0	(0.2)
Unrealized gains (losses) on derivative instruments	1.6	(2.5)	(0.1)	0.6
Reclassification adjustment for (gains) losses on derivative instruments recognized during the period	(1.2)	0.9	0.4	(2.2)
Unrealized gains (losses) on available-for-sale securities, net of tax	(1.2)	1.2	(0.4)	1.2
Total other comprehensive income	$ 121.3	$ 86.6	$ 343.8	$ 260.0

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Condensed Consolidated Statements Of Cash Flows (USD $) In Millions	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Operating Activities:
Net income	$ 343.9	$ 260.6
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	20.9	17.4
Amortization of intangible assets	13.1	12.2
Deferred income taxes	8.2	(11.8)
Income tax benefits from employee stock option plans	36.2	49.5
Excess tax benefit from stock-based compensation	(44.9)	(56.3)
Share-based compensation expense	101.8	87.5
Changes in operating assets and liabilities:
Accounts receivable	(18.2)	(2.4)
Inventory	(21.8)	(27.4)
Prepaids and other assets	(7.6)	(0.3)
Accounts payable	7.5	8.2
Deferred revenue	17.7	17.2
Other accrued liabilities	(8.9)	49.7
Net cash provided by operating activities	447.9	404.1
Investing Activities:
Purchase of investments	(1,176.0)	(1,032.2)
Proceeds from sales and maturities of investments	919.1	745.4
Purchase of property and equipment and acquisition of intellectual property	(67.7)	(86.6)
Net cash used in investing activities	(324.6)	(373.4)
Financing Activities:
Proceeds from issuance of common stock, net	181.6	132.9
Excess tax benefit from stock-based compensation	44.9	56.3
Repurchase and retirement of common stock	(331.8)	(58.9)
Net cash provided by (used in) financing activities	(105.3)	130.3
Effect of exchange rate changes on cash and cash equivalents	0.4	(0.4)
Net increase in cash and cash equivalents	18.4	160.6
Cash and cash equivalents, beginning of period	279.8	221.4
Cash and cash equivalents, end of period	$ 298.2	$ 382.0

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Net Income Per Share (Tables)

9 Months Ended

Sep. 30, 2011

Net Income Per Share [Abstract]

Computation Of Basic And Diluted Net Income Per Share

	Three Months Ended September 30,				Nine Months Ended September 30,
	2011		2010		2011		2010
Net income	$	122.4	$	86.6	$	343.9	$	260.6
Basic:
Weighted-average shares outstanding		39.1		39.4		39.2		39.2
Basic net income per share	$	3.13	$	2.20	$	8.77	$	6.65
Diluted:
Weighted-average shares outstanding used in basic calculation		39.1		39.4		39.2		39.2
Add common stock equivalents		1.0		1.1		1.0		1.2
Weighted-average shares used in computing diluted net income per share		40.1		40.5		40.2		40.4
Diluted net income per share	$	3.05	$	2.14	$	8.55	$	6.45

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Fair Value Measurements (Narrative) (Details) In Millions	3 Months Ended		9 Months Ended							3 Months Ended		9 Months Ended
	Sep. 30, 2011 USD ($)	Sep. 30, 2010 USD ($)	Sep. 30, 2011 USD ($)	Sep. 30, 2010 USD ($)	Sep. 30, 2011 GBP (£)	Sep. 30, 2011 CHF	Sep. 30, 2011 EUR (€)	Dec. 31, 2010 GBP (£)	Dec. 31, 2010 EUR (€)	Sep. 30, 2011 Designated As Hedging Instrument [Member] Other Income [Member] Foreign Exchange Forward [Member] USD ($)	Sep. 30, 2010 Designated As Hedging Instrument [Member] Other Income [Member] Foreign Exchange Forward [Member] USD ($)	Sep. 30, 2011 Designated As Hedging Instrument [Member] Other Income [Member] Foreign Exchange Forward [Member] USD ($)	Sep. 30, 2010 Designated As Hedging Instrument [Member] Other Income [Member] Foreign Exchange Forward [Member] USD ($)
Notional amount of outstanding currency forward contracts entered into to hedge Euro dominated sales							€ 6.6		€ 21.0
Notional amount of currency forward contracts to hedge non-functional currency denominated net monetary assets					1.8	1.7	23.9	2.2	26.0
Gains (losses) recognized as interest and other income, net, related to derivative instruments used to hedge against balance sheet foreign currency exposures										0.8	(2.3)	(2.4)	2.5
Foreign currency transaction gains (losses) before tax	$ (1.7)	$ 2.9	$ 1.5	$ (1.9)

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Summary Of Significant Accounting Policies

9 Months Ended

Sep. 30, 2011

Summary Of Significant Accounting Policies [Abstract]

Summary Of Significant Accounting Policies

NOTE 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Basis of Presentation

In the opinion of management, the accompanying unaudited Condensed Consolidated Financial Statements ("financial statements") of Intuitive Surgical, Inc. and its wholly-owned subsidiaries have been prepared on a consistent basis with the December 31, 2010 audited Consolidated Financial Statements and include all adjustments, consisting of only normal recurring adjustments, necessary to fairly state the information set forth herein. These financial statements have been prepared in accordance with the rules and regulations of the Securities and Exchange Commission ("SEC"), and, therefore, omit certain information and footnote disclosure necessary to present the statements in accordance with U.S. generally accepted accounting principles ("U.S. GAAP"). These financial statements should be read in conjunction with the audited Consolidated Financial Statements and Notes thereto included in the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2010, which was filed on February 1, 2011. The results of operations for the first nine months of fiscal 2011 are not indicative of the results to be expected for the entire fiscal year or any future periods.

New Accounting Standards Recently Adopted

No new accounting standards have been adopted since the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2010 was filed.

Recent Accounting Pronouncements

In June 2011, the Financial Accounting Standard Board ("FASB") issued new accounting guidance related to the presentation of comprehensive income that increases comparability between U.S. GAAP and International Financial Reporting Standard. This guidance eliminates the current option to report other comprehensive income (OCI) and its components in the statement of changes in stockholders' equity. This guidance is effective for the Company's interim and annual periods beginning January 1, 2012. The Company intends to adopt this guidance during the first quarter of 2012 and will report OCI in a separate statement.

In September 2011, the FASB issued new accounting guidance intended to simplify goodwill impairment testing. Entities will be allowed to perform a qualitative assessment on goodwill impairment to determine whether a quantitative assessment is necessary. This guidance is effective for the Company's interim and annual periods beginning January 1, 2012. The Company does not believe the adoption of this guidance will have a material impact on its consolidated financial statements.

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Summary Of Significant Accounting Policies (Policy)

9 Months Ended

Sep. 30, 2011

Summary Of Significant Accounting Policies [Abstract]

Basis Of Presentation

Basis of Presentation

In the opinion of management, the accompanying unaudited Condensed Consolidated Financial Statements ("financial statements") of Intuitive Surgical, Inc. and its wholly-owned subsidiaries have been prepared on a consistent basis with the December 31, 2010 audited Consolidated Financial Statements and include all adjustments, consisting of only normal recurring adjustments, necessary to fairly state the information set forth herein. These financial statements have been prepared in accordance with the rules and regulations of the Securities and Exchange Commission ("SEC"), and, therefore, omit certain information and footnote disclosure necessary to present the statements in accordance with U.S. generally accepted accounting principles ("U.S. GAAP"). These financial statements should be read in conjunction with the audited Consolidated Financial Statements and Notes thereto included in the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2010, which was filed on February 1, 2011. The results of operations for the first nine months of fiscal 2011 are not indicative of the results to be expected for the entire fiscal year or any future periods.

New Accounting Pronouncements And Changes In Accounting Principles

New Accounting Standards Recently Adopted

No new accounting standards have been adopted since the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2010 was filed.

Recent Accounting Pronouncements

In June 2011, the Financial Accounting Standard Board ("FASB") issued new accounting guidance related to the presentation of comprehensive income that increases comparability between U.S. GAAP and International Financial Reporting Standard. This guidance eliminates the current option to report other comprehensive income (OCI) and its components in the statement of changes in stockholders' equity. This guidance is effective for the Company's interim and annual periods beginning January 1, 2012. The Company intends to adopt this guidance during the first quarter of 2012 and will report OCI in a separate statement.

In September 2011, the FASB issued new accounting guidance intended to simplify goodwill impairment testing. Entities will be allowed to perform a qualitative assessment on goodwill impairment to determine whether a quantitative assessment is necessary. This guidance is effective for the Company's interim and annual periods beginning January 1, 2012. The Company does not believe the adoption of this guidance will have a material impact on its consolidated financial statements.

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Stock-Based Compensation (Fair Value Of The Option Using Black-Scholes Option Pricing Model, Weighted Average Assumptions) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Stock Option Plans [Member]
Average risk free interest rate	1.13%	1.61%	2.24%	2.28%
Average expected term (years)	4.5	4.8	4.8	4.8
Average expected volatility	35.00%	44.00%	35.00%	35.00%
Weighted average fair value at grant date	$ 115.09	$ 121.32	$ 114.69	$ 112.32
Total stock-based compensation expense	$ 32.9	$ 28.1	$ 95.7	$ 81.3
Employee Stock Purchase Plan [Member]
Average risk free interest rate	0.27%	0.37%	0.32%	0.43%
Average expected term (years)	1.3	1.3	1.3	1.3
Average expected volatility	31.00%	43.00%	33.00%	39.00%
Weighted average fair value at grant date	$ 112.75	$ 110.90	$ 99.94	$ 106.72
Total stock-based compensation expense	$ 2.0	$ 2.3	$ 6.1	$ 6.2

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Stockholders' Equity (Tables)

9 Months Ended

Sep. 30, 2011

Stockholders' Equity [Abstract]

Schedule Of Stock Repurchase Activities

	Three Months Ended September 30,				Nine Months Ended September 30,
	2011		2010		2011		2010
Shares repurchased		0.5		0.2		1.0		0.2
Average price per share	$	344.36	$	277.92	$	344.72	$	277.92
Value of shares repurchased	$	181.1	$	58.9	$	331.8	$	58.9

Components Of Comprehensive Income, Net Of Tax

	Three Months  Ended September 30,						Nine Months  Ended September 30,
	2011			2010			2011			2010
Net income	$	122.4		$	86.6		$	343.9		$	260.6
Foreign currency translation gains (losses)		(0.3	)		0.4			0.0			(0.2	)
Unrealized gains (losses) on derivative instruments, net of tax:
Unrealized gains (losses) on derivative instruments		1.6			(2.5	)		(0.1	)		0.6
Reclassification adjustment for (gains) losses on derivative instruments recognized during the period		(1.2	)		0.9			0.4			(2.2	)
Unrealized gains (losses) on available-for-sale securities, net of tax		(1.2	)		1.2			(0.4	)		1.2
Total other comprehensive income	$	121.3		$	86.6		$	343.8		$	260.0

Components Of Accumulated Other Comprehensive Income

	September 30, 2011		December 31, 2010
Foreign currency translation gains	$	0.1	$	0.1
Accumulated net unrealized gains on derivatives, net of tax		0.5		0.2
Accumulated net unrealized gains on available-for-sale securities, net of tax		0.9		1.3
Total accumulated other comprehensive income	$	1.5	$	1.6

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Condensed Consolidated Balance Sheets (USD $) In Millions	Sep. 30, 2011	Dec. 31, 2010
ASSETS
Cash and cash equivalents	$ 298.2	$ 279.8
Short-term investments	612.4	630.6
Accounts receivable, net	265.1	246.8
Inventory	108.6	86.8
Prepaids and other assets	22.8	23.3
Deferred tax assets	4.8	8.5
Total current assets	1,311.9	1,275.8
Property, plant and equipment, net	196.0	159.8
Long-term investments	976.7	698.5
Long-term deferred tax assets	69.1	73.3
Intangible and other assets, net	75.4	66.1
Goodwill	116.9	116.9
Total assets	2,746.0	2,390.4
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable	43.2	35.6
Accrued compensation and employee benefits	60.3	63.4
Deferred revenue	143.7	126.1
Other accrued liabilities	36.9	48.7
Total current liabilities	284.1	273.8
Long-term liabilities	92.9	79.2
Total liabilities	377.0	353.0
Commitments and contingencies	0	0
Stockholders' equity:
Preferred stock, 2.5 shares authorized, $0.001 par value, issuable in series; no shares issued and outstanding as of September 30, 2011 and December 31, 2010	0	0
Common stock, 100.0 shares authorized, $0.001 par value, 39.0 and 38.9 shares issued and outstanding as of September 30, 2011 and December 31, 2010, respectively	0	0
Additional paid-in capital	1,616.8	1,316.9
Retained earnings	750.7	718.9
Accumulated other comprehensive income	1.5	1.6
Total stockholders' equity	2,369.0	2,037.4
Total liabilities and stockholders' equity	$ 2,746.0	$ 2,390.4

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Net Income Per Share (Details) (USD $) In Millions, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Net Income Per Share [Abstract]
Net income	$ 122.4	$ 86.6	$ 343.9	$ 260.6
Weighted-average shares outstanding	39.1	39.4	39.2	39.2
Basic net income per share	$ 3.13	$ 2.20	$ 8.77	$ 6.65
Weighted-average shares outstanding used in basic calculation	39.1	39.4	39.2	39.2
Add common stock equivalents	1.0	1.1	1.0	1.2
Weighted-average shares used in computing diluted net income per share	40.1	40.5	40.2	40.4
Diluted net income per share	$ 3.05	$ 2.14	$ 8.55	$ 6.45
Employee stock options excluded from computation of diluted net income per share because the effect of including such shares would have been antidilutive	2.2	1.7	2.2	1.2