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Basis of Presentation and Summary of Significant Accounting Policies (Details) (USD $) Share data in Millions, unless otherwise specified | 12 Months Ended | 20 Months Ended |  | 12 Months Ended |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2013 Programs authorized by Board of Directors [Member] | Dec. 31, 2012 Programs authorized by Board of Directors [Member] | Dec. 31, 2011 Programs authorized by Board of Directors [Member] | Dec. 31, 2013 Related to Vesting of Restricted Stock Units [Member] | Dec. 31, 2012 Related to Vesting of Restricted Stock Units [Member] | Dec. 31, 2011 Related to Vesting of Restricted Stock Units [Member] | Dec. 31, 2013 May 2012 Program [Member] | May 09, 2012 May 2012 Program [Member] | Dec. 31, 2013 Internal-Use Software [Member] | Dec. 31, 2013 Minimum Buildings [Member] | Dec. 31, 2013 Minimum Building Improvements [Member] | Dec. 31, 2013 Minimum Production and other equipment [Member] | Dec. 31, 2013 Maximum Buildings [Member] | Dec. 31, 2013 Maximum Building Improvements [Member] | Dec. 31, 2013 Maximum Production and other equipment [Member] | Dec. 31, 2013 Purchased intangibles [Member] | Dec. 31, 2012 Purchased intangibles [Member] | Dec. 31, 2013 Purchased intangibles [Member] Minimum | Dec. 31, 2013 Purchased intangibles [Member] Maximum | Dec. 31, 2013 Capitalized software [Member] | Dec. 31, 2012 Capitalized software [Member] | Dec. 31, 2013 Capitalized software [Member] Minimum | Dec. 31, 2013 Capitalized software [Member] Maximum | Dec. 31, 2013 Patents and other intangibles [Member] | Dec. 31, 2012 Patents and other intangibles [Member] | Dec. 31, 2013 Patents and other intangibles [Member] Minimum | Dec. 31, 2013 Patents and other intangibles [Member] Maximum | Dec. 31, 2013 Unsecured debt [Member] | Dec. 31, 2012 Unsecured debt [Member] | Dec. 31, 2013 Held by foreign subsidiaries [Member] | Dec. 31, 2012 Held by foreign subsidiaries [Member] | Dec. 31, 2013 US Treasury Securities | Dec. 31, 2012 US Treasury Securities | Dec. 31, 2013 Foreign Government Debt Securities | Dec. 31, 2012 Foreign Government Debt Securities | Dec. 31, 2013 Corporate Debt Securities | Dec. 31, 2012 Corporate Debt Securities | Dec. 31, 2013 Time Deposits | Dec. 31, 2012 Time Deposits | Dec. 31, 2013 Equity Securities | Dec. 31, 2012 Equity Securities | Dec. 31, 2013 Significant Other Observable Inputs (Level 2) | Dec. 31, 2012 Significant Other Observable Inputs (Level 2) | Dec. 31, 2013 Significant Other Observable Inputs (Level 2) US Treasury Securities | Dec. 31, 2012 Significant Other Observable Inputs (Level 2) US Treasury Securities | Dec. 31, 2013 Significant Other Observable Inputs (Level 2) Foreign Government Debt Securities | Dec. 31, 2012 Significant Other Observable Inputs (Level 2) Foreign Government Debt Securities | Dec. 31, 2013 Significant Other Observable Inputs (Level 2) Corporate Debt Securities | Dec. 31, 2012 Significant Other Observable Inputs (Level 2) Corporate Debt Securities | Dec. 31, 2013 Significant Other Observable Inputs (Level 2) Time Deposits | Dec. 31, 2012 Significant Other Observable Inputs (Level 2) Time Deposits | Dec. 31, 2013 Significant Other Observable Inputs (Level 2) Equity Securities | Dec. 31, 2012 Significant Other Observable Inputs (Level 2) Equity Securities
Allowance for Doubtful Accounts and Sales Returns Roll Forward [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowances for doubtful accounts and sales returns, balance at beginning of period | $ 8,240,000 | $ 8,584,000 | $ 6,196,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additions to allowance for doubtful accounts and sales returns | 4,386,000 | 7,298,000 | 9,932,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deductions from allowance for doubtful accounts and sales returns | (5,569,000) | (7,642,000) | (7,544,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowances for doubtful accounts and sales returns, balance at end of period | 7,057,000 | 8,240,000 | 8,584,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts description | Past due balances over 90 days and over a specified amount are reviewed individually for collectibility. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis of Presentation and Summary of Significant Accounting Policies [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated entities | The Company consolidates entities in which it owns or controls fifty percent or more of the voting shares. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percent of net sales derived from operations outside United States | 71.00% | 71.00% | 71.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency transactions disclosures | Gains and losses from foreign currency transactions are included in net income in the consolidated statements of operations and were not material for the years presented. | Gains and losses from foreign currency transactions are included in net income in the consolidated statements of operations and were not material for the years presented. | Gains and losses from foreign currency transactions are included in net income in the consolidated statements of operations and were not material for the years presented. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percent of net sales to pharmaceutical industry | 52.00% | 53.00% | 52.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cost method of investments disclosures | The Company accounts for its investments that represent less than twenty percent ownership, and for which the Company does not have significant influence, using the accounting standards for investments in debt and equity securities. Investments for which the Company does not have the ability to exercise significant influence, and for which there is not a readily determinable market value, are accounted for under the cost method of accounting. The Company periodically evaluates the carrying value of its investments accounted for under the cost method of accounting and carries them at the lower of cost or estimated net realizable value. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity method of investments disclosures | For investments in which the Company owns or controls between twenty and forty-nine percent of the voting shares, or over which it exerts significant influence over operating and financial policies, the equity method of accounting is used. The Company’s share of net income or losses of equity investments is included in the consolidated statements of operations and was not material in any period presented. | The Company’s share of net income or losses of equity investments is included in the consolidated statements of operations and was not material in any period presented. | The Company’s share of net income or losses of equity investments is included in the consolidated statements of operations and was not material in any period presented. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term investments | 3,000,000 | 3,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Advertising expense | 11,000,000 | 13,000,000 | 11,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum percentage of net sales to an individual customer | 2.00% | 2.00% | 2.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount of foreign exchange contracts | 104,000,000 | 134,000,000 | 161,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative net pre-tax gains (losses) on forward foreign exchange contracts | 9,027,000 | 5,902,000 | (3,268,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Realized gains (losses) on foreign exchange contracts | 8,666,000 | 4,186,000 | (2,233,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unrealized gains (losses) on foreign exchange contracts | 361,000 | 1,716,000 | (1,035,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity period of foreign exchange contracts | The periods of these forward contracts typically range from one to three months and have varying notional amounts, which are intended to be consistent with changes in the underlying exposures. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value of Assets and Liabilities Measured on a Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash Equivalents and Short-Term Investments, Fair Value | 1,399,840,000 | 1,159,372,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 556,539,000 | 470,421,000 | 139,670,000 | 313,237,000 | 629,434,000 | 311,607,000 | 74,050,000 | 64,037,000 | 147,000 | 70,000 |  |  | 556,539,000 | 470,421,000 | 139,670,000 | 313,237,000 | 629,434,000 | 311,607,000 | 74,050,000 | 64,037,000 | 147,000 | 70,000
Other cash equivalents | 62,851,000 | 44,850,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 62,851,000 | 44,850,000 |  |  |  |  |  |  |  |  |  |
Waters 401(k) Restoration Plan assets | 31,203,000 | 24,827,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 31,203,000 | 24,827,000 |  |  |  |  |  |  |  |  |  |
Forward foreign exchange contract assets | 929,000 | 1,173,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 929,000 | 1,173,000 |  |  |  |  |  |  |  |  |  |
Fair value of total assets measured on a recurring basis | 1,494,823,000 | 1,230,222,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,494,823,000 | 1,230,222,000 |  |  |  |  |  |  |  |  |  |
Forward foreign exchange contract liabilities | 88,000 | 693,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 88,000 | 693,000 |  |  |  |  |  |  |  |  |  |
Fair value of total liabilities measured on a recurring basis | 88,000 | 693,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 88,000 | 693,000 |  |  |  |  |  |  |  |  |  |
Cash, Cash Equivalents and Short-Term Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents description | Cash equivalents represent highly liquid investments, with original maturities of 90 days or less, primarily in bank deposits, U.S. and U.K. treasury bill money market funds and commercial paper. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash, cash equivalents and investments | 1,804,000,000 | 1,539,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,738,000,000 | 1,489,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt | 1,190,000,000 | 1,045,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 400,000,000 | 400,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of debt instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 398,000,000 | 413,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets, average useful life in years | 8 years | 7 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10 years | 11 years | 1 year | 15 years | 7 years | 5 years | 3 years | 10 years | 8 years | 8 years | 1 year | 13 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capitalized software development costs for software sold to customers, net | 151,000,000 | 138,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additions to capitalized software development costs for software sold to customers | 35,000,000 | 34,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful life of property, plant and equipment |  |  |  |  |  |  |  |  |  |  |  | 10 years | 15 years | 5 years | 3 years | 30 years | 10 years | 10 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment disposition disclosures | There were no material gains or losses from retirement or sale of assets in 2013, 2012 and 2011. | There were no material gains or losses from retirement or sale of assets in 2013, 2012 and 2011. | There were no material gains or losses from retirement or sale of assets in 2013, 2012 and 2011. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capitalized costs for sofware developed for internal use, net | 3,000,000 | 3,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Repurchase Program [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock repurchase program authorization amount |  |  |  |  |  |  |  |  |  |  | 750,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Treasury stock shares acquired |  |  |  | 3.1 | 3.5 | 4.5 |  |  |  | 4.3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Treasury stock | 301,580,000 | 295,878,000 | 370,835,000 | 295,000,000 | 290,000,000 | 364,000,000 | 6,000,000 | 6,000,000 | 6,000,000 | 402,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock repurchase program remaining amount authorized for future purchases |  |  |  |  |  |  |  |  |  | 348,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock repurchase program period, in years |  |  |  |  |  |  |  |  |  |  | 2 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warranty Accrual Roll Forward [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accrued warranty liability, balance at beginning of period | 12,353,000 | 13,258,000 | 11,272,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accruals for warranties | 8,466,000 | 7,212,000 | 10,175,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Settlements made | (7,857,000) | (8,117,000) | (8,189,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accrued warranty liability, balance at end of period | $ 12,962,000 | $ 12,353,000 | $ 13,258,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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