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Debt - Additional Information (Detail) (USD $) | 12 Months Ended |  | 1 Months Ended |  |  | 1 Months Ended |  |  |  | 12 Months Ended | 1 Months Ended |  | 1 Months Ended |  |  |  |  |  |  |  |  | 1 Months Ended |  |  |  |  | 12 Months Ended |
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Sep. 29, 2012 | Oct. 04, 2012 Pentair Middle East Holding S.a.r.l. | Dec. 31, 2013 CPT | Dec. 31, 2012 CPT | Sep. 29, 2012 Credit Facility | Dec. 31, 2013 Credit Facility | Apr. 30, 2011 Credit Facility | Dec. 31, 2013 Other Credit Facilities | Dec. 31, 2013 Minimum | Dec. 31, 2013 Maximum | Oct. 30, 2012 Senior Notes | Oct. 31, 2012 Senior Notes | Dec. 31, 2012 Senior Notes, 5.000% Due 2021 | Dec. 31, 2013 Senior Notes, 5.000% Due 2021 | May 31, 2011 Senior Notes, 5.000% Due 2021 | Dec. 31, 2013 Senior Notes, 5.000% Due 2021 Fixed Rate | Nov. 30, 2012 Senior Notes 3.50% due 2015 | Dec. 31, 2013 Senior Notes 3.50% due 2015 Fixed Rate | Nov. 30, 2012 Senior Notes 2.650% due 2019 | Dec. 31, 2013 Senior Notes 2.650% due 2019 Fixed Rate | Oct. 31, 2012 Senior Notes 5.65% Fixed Rate | Oct. 31, 2012 Senior Notes 5.65% Fixed Rate Minimum | Oct. 31, 2012 Senior Notes 5.65% Fixed Rate Maximum | Oct. 31, 2012 Senior Notes 1.05% Due 2013 Floating Rate | Oct. 30, 2012 Senior Notes 1.05% Due 2013 Senior Notes | Sep. 29, 2012 Senior Notes 3.150% due 2022 | Dec. 31, 2013 Senior Notes 3.150% due 2022 Fixed Rate | Sep. 29, 2012 Senior Notes 1.875 % due 2017 | Dec. 31, 2013 Senior Notes 1.875 % due 2017 Fixed Rate | Dec. 31, 2013 Subsidiary Issuer | Dec. 31, 2012 Subsidiary Issuer | Dec. 31, 2013 Subsidiary Issuer Senior Notes, 5.000% Due 2021 | Dec. 31, 2013 Subsidiary Issuer Senior Notes 3.50% due 2015 | Dec. 31, 2013 Subsidiary Issuer Senior Notes 2.650% due 2019 | Dec. 31, 2013 Subsidiary Issuer Senior Notes 3.150% due 2022 | Dec. 31, 2013 Subsidiary Issuer Senior Notes 1.875 % due 2017
Debt Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100.00% |  |  |  |  |  |
Aggregate principal amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 373,000,000 | $ 500,000,000 |  | $ 350,000,000 |  | $ 250,000,000 |  |  |  |  |  |  | $ 550,000,000 |  | $ 350,000,000 |  |  |  |  |  |  |  |
Debt, interest rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.00% |  |  | 1.35% |  | 2.65% |  | 5.65% |  |  |  |  | 3.15% |  | 1.875% |  |  |  | 5.00% | 1.35% | 2.65% | 3.15% | 1.875%
Debt, maturity year |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2021 | 2021 | 2021 | 2015 | 2015 | 2019 | 2019 |  | 2013 | 2017 | 2013 |  | 2022 | 2022 | 2017 | 2017 |  |  | 2021 | 2015 | 2019 | 2022 | 2017
Debt transaction cost paid | 0 | 74,800,000 | 0 |  |  |  |  |  |  |  |  |  |  |  |  | 5,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  |  |
Aggregate principal amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 127,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding aggregate principal |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 400,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Floating rate notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.05% |  |  |  |  |  |  |  |  |  |  |  |
Redemption value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100,000,000 |  |  |  |  |  |  |  |  |  |  |
Whole premium amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 65,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Terminate related interest rate swaps |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unamortized deferred financing costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument proceeds used to repay amounts of other debt |  |  |  | 435,000,000 |  |  |  |  |  | 105,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit facility maximum borrowing capacity |  |  |  |  |  |  |  | 1,450,000,000 |  | 700,000,000 | 86,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Previous revolving credit facility |  |  |  |  |  |  |  | 700,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit facility expiration date |  |  |  |  |  |  |  | Sep. 30, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Facility Fees, minimum |  |  |  |  |  |  |  | 0.0010 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Facility Fees, maximum |  |  |  |  |  |  |  | 0.0030 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit facility interest rate, before the addition of LIBOR |  |  |  |  |  |  |  |  |  | 1.75% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial paper outstanding | 528,900,000 | 424,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Remaining availability under Credit Facility |  |  |  |  |  |  |  |  | 921,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage Of Ownership Interest Acquired |  |  |  |  | 25.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash paid |  |  |  |  | 100,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cost and expenses incurred in connection with acquisition | 8,200,000 | 57,300,000 | 8,200,000 |  |  |  |  |  |  |  |  |  | 40,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt agreement financial covenant, leverage ratio |  |  |  |  |  |  |  |  |  |  |  | 3.50 | 3.00 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Compliance with debt agreement financial covenants | we were in compliance with all financial covenants in our debt agreements. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, amount outstanding |  |  |  |  |  |  |  |  | 0 |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital lease obligation cost |  |  |  |  |  | 41,700,000 | 40,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accumulated amortization |  |  |  |  |  | 7,600,000 | 6,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Future minimum lease payments | 23,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Imputed interest | $ 1,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Amount of cash paid to acquire the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 68 -Subparagraph f(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph d -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=21917927&loc=d3e1043-128460 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 59 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date before deducting unamortized discount or premiums (if any). May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number APB14-1 -Paragraph 31 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition States whether the entity was in compliance with the debt covenants throughout the reporting period, and describes facts and circumstances of any compliance failure. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The stated principal amount of the debt instrument at time of issuance, which may vary from the carrying amount because of unamortized premium or discount. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 21 -Paragraph 16, 20 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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