Basis of Presentation	6 Months Ended
Jun. 30, 2018
Notes To Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (hereinafter referred to as “generally accepted accounting principles”) for interim financial statements and with the instructions to Form 10-Q and Article 10 of Regulation S-X and do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. In the opinion of management, all adjustments considered necessary for a fair presentation of the results of operations for the interim periods have been included and are of a normal, recurring nature. Operating results for the three and six months ended June 30, 2018 are not necessarily indicative of the results that may be expected for a full fiscal year. For further information, refer to the consolidated financial statements and footnotes included in Stanley Black & Decker, Inc.’s (the “Company”) Form 10-K for the year ended December 30, 2017, and subsequent related filings with the Securities and Exchange Commission. In April 2018, the Company acquired the industrial business of Nelson Fastener Systems ("Nelson") from the Doncasters Group, which is being accounted for as a business combination. The results of this acquisition are being consolidated into the Company's Industrial segment. In March 2017, the Company acquired the Tools business of Newell Brands ("Newell Tools") and the Craftsman® brand, which were both accounted for as business combinations. The results of these acquisitions have been consolidated into the Company's Tools & Storage segment. Refer to Note F, Acquisitions, for further discussion on these acquisitions. In February 2017, the Company sold the majority of its mechanical security businesses within the Security segment, which included the commercial hardware brands of Best Access, phi Precision and GMT. The Company also sold two small businesses within the Tools & Storage segment in the first and fourth quarters of 2017, and one small business in the Industrial segment in the third quarter of 2017. The operating results of these businesses have been reported within continuing operations in the Condensed Consolidated Financial Statements through their respective dates of sale in 2017. Refer to Note T, Divestitures, for further discussion. The preparation of financial statements in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the amounts reported in the financial statements. While management believes that the estimates and assumptions used in the preparation of the financial statements are appropriate, actual results could differ from these estimates. Certain amounts reported in the previous year have been recast as a result of the retrospective adoption of new accounting standards in the first quarter of 2018. Refer to Note B, New Accounting Standards, for further discussion. Financial Instruments Derivative financial instruments are employed to manage risks, including foreign currency, interest rate exposures and commodity prices and are not used for trading or speculative purposes. As part of the Company’s risk management program, a variety of financial instruments such as interest rate swaps, currency swaps, purchased currency options, foreign exchange contracts and commodity contracts, may be used to mitigate interest rate exposure, foreign currency exposure and commodity price exposure. The Company recognizes all derivative instruments in the balance sheet at fair value. Changes in the fair value of derivatives are recognized periodically either in earnings or in shareowners’ equity as a component of other comprehensive income (loss) ("OCI") , depending on whether the derivative financial instrument is undesignated or qualifies for hedge accounting, and if so, whether it represents a fair value, cash flow, or net investment hedge. Changes in the fair value of derivatives accounted for as fair value hedges are recorded in earnings in the same caption as the changes in the fair value of the hedged items. Gains and losses on derivatives designated as cash flow hedges, to the extent they are included in the assessment of effectiveness, are recorded in other comprehensive income (loss) and subsequently reclassified to earnings to offset the impact of the hedged items when they occur. In the event it becomes probable the forecasted transaction to which a cash flow hedge relates will not occur, the derivative would be terminated and the amount in other comprehensive income (loss) would be recognized in earnings. Changes in the fair value of derivatives that are designated and qualify as a hedge of the net investment in foreign operations, to the extent they are included in the assessment of effectiveness, are reported in other comprehensive income (loss) and are deferred until disposal of the underlying assets. Gains and losses representing components excluded from the assessment of effectiveness for cash flow and fair value hedges are recognized in earnings on a straight-line basis in the same caption as the hedged item over the term of the hedge. Gains and losses representing components excluded from the assessment of effectiveness for net investment hedges are recognized in earnings on a straight-line basis in Other, net over the term of the hedge. The net interest paid or received on interest rate swaps is recognized as interest expense. Gains and losses resulting from the early termination of interest rate swap agreements are deferred and amortized as adjustments to interest expense over the remaining period of the debt originally covered by the terminated swap. Changes in the fair value of derivatives not designated as hedges are reported in Other, net in the Consolidated Statements of Operations and Comprehensive Income. Refer to Note I, Financial Instruments, for further discussion. Revenue Recognition The Company’s revenues result from the sale of goods or services and reflect the consideration to which the Company expects to be entitled. The Company records revenue based on a five-step model in accordance with Accounting Standards Codification ("ASC") 606, Revenue from Contracts with Customers ("ASC 606"). For its customer contracts, the Company identifies the performance obligations (goods or services), determines the transaction price, allocates the contract transaction price to the performance obligations, and recognizes the revenue when (or as) the performance obligation is transferred to the customer. A good or service is transferred when (or as) the customer obtains control of that good or service. The majority of the Company’s revenues are recorded at a point in time from the sale of tangible products. Provisions for customer volume rebates, product returns, discounts and allowances are variable consideration and are recorded as a reduction of revenue in the same period the related sales are recorded. Such provisions are calculated using historical averages adjusted for any expected changes due to current business conditions. Consideration given to customers for cooperative advertising is recognized as a reduction of revenue except to the extent that there is a distinct good or service and evidence of the fair value of the advertising, in which case the expense is classified as selling, general, and administrative expense. The Company’s revenues can be generated from contracts with multiple performance obligations. When a sales agreement involves multiple performance obligations, each obligation is separately identified and the transaction price is allocated based on the amount of consideration the Company expects to be entitled to in exchange for transferring the promised good or service to the customer. Sales of security monitoring systems may have multiple performance obligations, including equipment, installation and monitoring or maintenance services. In most instances, the Company allocates the appropriate amount of consideration to each performance obligation based on the standalone selling price ("SSP") of the distinct goods or services performance obligation. In circumstances where SSP is not observable, the Company allocates the consideration for the performance obligations by utilizing one of the following methods: expected cost plus margin, the residual approach, or a mix of these estimation methods. For performance obligations that the Company satisfies over time, revenue is recognized by consistently applying a method of measuring progress toward complete satisfaction of that performance obligation. The Company utilizes the method that most accurately depicts the progress toward completion of the performance obligation. The Company’s contract sales for the installation of security intruder systems and other construction-related projects are generally recorded under the input method. The input method recognizes revenue on the basis of the Company’s efforts or inputs to the satisfaction of a performance obligation relative to the total inputs expected to satisfy that performance obligation. Revenue recognized on security contracts in process are based upon the allocated contract price and related total inputs of the project at completion. The extent of progress toward completion is generally measured using input methods based on labor metrics. Revisions to these estimates as contracts progress have the effect of increasing or decreasing profits each period. Provisions for anticipated losses are made in the period in which they become determinable. The revenues for monitoring and monitoring-related services are recognized as services are rendered over the contractual period. The Company utilizes the output method for contract sales in the Oil & Gas business. The output method recognizes revenue based on direct measurements of the customer value of the goods or services transferred to date relative to the remaining goods or services promised under the contract. The output method includes methods such as surveys of performance completed to date, appraisals of results achieved, milestones reached, time elapsed, and units produced or units delivered. Contract assets or liabilities result from transactions with revenue recorded over time. If the measure of remaining rights exceeds the measure of the remaining performance obligations the Company records a contract asset. Conversely, if the measure of the remaining performance obligations exceeds the measure of the remaining rights, the Company records a contract liability. Incremental costs of obtaining or fulfilling a contract with a customer that are expected to be recovered are recognized and classified in Other current assets or Other assets in the Condensed Consolidated Balance Sheets and are typically amortized over the contract period. The Company recognizes the incremental costs of obtaining or fulfilling a contract as expense when incurred if the amortization period of the asset is one year or less. Customer billings for services not yet rendered are deferred and recognized as revenue as the services are rendered. The associated deferred revenue is included in Accrued expenses or Other liabilities, as appropriate, in the Condensed Consolidated Balance Sheets. Refer to Note D, Accounts and Notes Receivable, for further discussion.

Basis of Presentation

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (hereinafter referred to as “generally accepted accounting principles”) for interim financial statements and with the instructions to Form 10-Q and Article 10 of Regulation S-X and do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. In the opinion of management, all adjustments considered necessary for a fair presentation of the results of operations for the interim periods have been included and are of a normal, recurring nature. Operating results for the three and six months ended June 30, 2018 are not necessarily indicative of the results that may be expected for a full fiscal year. For further information, refer to the consolidated financial statements and footnotes included in Stanley Black & Decker, Inc.’s (the “Company”) Form 10-K for the year ended December 30, 2017, and subsequent related filings with the Securities and Exchange Commission.

In April 2018, the Company acquired the industrial business of Nelson Fastener Systems ("Nelson") from the Doncasters Group, which is being accounted for as a business combination. The results of this acquisition are being consolidated into the Company's Industrial segment. In March 2017, the Company acquired the Tools business of Newell Brands ("Newell Tools") and the Craftsman® brand, which were both accounted for as business combinations. The results of these acquisitions have been consolidated into the Company's Tools & Storage segment. Refer to Note F, Acquisitions, for further discussion on these acquisitions.

In February 2017, the Company sold the majority of its mechanical security businesses within the Security segment, which included the commercial hardware brands of Best Access, phi Precision and GMT. The Company also sold two small businesses within the Tools & Storage segment in the first and fourth quarters of 2017, and one small business in the Industrial segment in the third quarter of 2017. The operating results of these businesses have been reported within continuing operations in the Condensed Consolidated Financial Statements through their respective dates of sale in 2017. Refer to Note T, Divestitures, for further discussion.

The preparation of financial statements in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the amounts reported in the financial statements. While management believes that the estimates and assumptions used in the preparation of the financial statements are appropriate, actual results could differ from these estimates. Certain amounts reported in the previous year have been recast as a result of the retrospective adoption of new accounting standards in the first quarter of 2018. Refer to Note B, New Accounting Standards, for further discussion.

Financial Instruments

Derivative financial instruments are employed to manage risks, including foreign currency, interest rate exposures and commodity prices and are not used for trading or speculative purposes. As part of the Company’s risk management program, a variety of financial instruments such as interest rate swaps, currency swaps, purchased currency options, foreign exchange contracts and commodity contracts, may be used to mitigate interest rate exposure, foreign currency exposure and commodity price exposure. The Company recognizes all derivative instruments in the balance sheet at fair value.

Changes in the fair value of derivatives are recognized periodically either in earnings or in shareowners’ equity as a component of other comprehensive income (loss) ("OCI") , depending on whether the derivative financial instrument is undesignated or qualifies for hedge accounting, and if so, whether it represents a fair value, cash flow, or net investment hedge. Changes in the fair value of derivatives accounted for as fair value hedges are recorded in earnings in the same caption as the changes in the fair value of the hedged items. Gains and losses on derivatives designated as cash flow hedges, to the extent they are included in the assessment of effectiveness, are recorded in other comprehensive income (loss) and subsequently reclassified to earnings to offset the impact of the hedged items when they occur. In the event it becomes probable the forecasted transaction to which a cash flow hedge relates will not occur, the derivative would be terminated and the amount in other comprehensive income (loss) would be recognized in earnings. Changes in the fair value of derivatives that are designated and qualify as a hedge of the net investment in foreign operations, to the extent they are included in the assessment of effectiveness, are reported in other comprehensive income (loss) and are deferred until disposal of the underlying assets. Gains and losses representing components excluded from the assessment of effectiveness for cash flow and fair value hedges are recognized in earnings on a straight-line basis in the same caption as the hedged item over the term of the hedge. Gains and losses representing components excluded from the assessment of effectiveness for net investment hedges are recognized in earnings on a straight-line basis in Other, net over the term of the hedge.

The net interest paid or received on interest rate swaps is recognized as interest expense. Gains and losses resulting from the early termination of interest rate swap agreements are deferred and amortized as adjustments to interest expense over the remaining period of the debt originally covered by the terminated swap.

Changes in the fair value of derivatives not designated as hedges are reported in Other, net in the Consolidated Statements of Operations and Comprehensive Income. Refer to Note I, Financial Instruments, for further discussion.

Revenue Recognition

The Company’s revenues result from the sale of goods or services and reflect the consideration to which the Company expects to be entitled. The Company records revenue based on a five-step model in accordance with Accounting Standards Codification ("ASC") 606, Revenue from Contracts with Customers ("ASC 606"). For its customer contracts, the Company identifies the performance obligations (goods or services), determines the transaction price, allocates the contract transaction price to the performance obligations, and recognizes the revenue when (or as) the performance obligation is transferred to the customer. A good or service is transferred when (or as) the customer obtains control of that good or service. The majority of the Company’s revenues are recorded at a point in time from the sale of tangible products.

Provisions for customer volume rebates, product returns, discounts and allowances are variable consideration and are recorded as a reduction of revenue in the same period the related sales are recorded. Such provisions are calculated using historical averages adjusted for any expected changes due to current business conditions. Consideration given to customers for cooperative advertising is recognized as a reduction of revenue except to the extent that there is a distinct good or service and evidence of the fair value of the advertising, in which case the expense is classified as selling, general, and administrative expense.

The Company’s revenues can be generated from contracts with multiple performance obligations. When a sales agreement involves multiple performance obligations, each obligation is separately identified and the transaction price is allocated based on the amount of consideration the Company expects to be entitled to in exchange for transferring the promised good or service to the customer.

Sales of security monitoring systems may have multiple performance obligations, including equipment, installation and monitoring or maintenance services. In most instances, the Company allocates the appropriate amount of consideration to each performance obligation based on the standalone selling price ("SSP") of the distinct goods or services performance obligation. In circumstances where SSP is not observable, the Company allocates the consideration for the performance obligations by utilizing one of the following methods: expected cost plus margin, the residual approach, or a mix of these estimation methods.

For performance obligations that the Company satisfies over time, revenue is recognized by consistently applying a method of measuring progress toward complete satisfaction of that performance obligation. The Company utilizes the method that most accurately depicts the progress toward completion of the performance obligation.

The Company’s contract sales for the installation of security intruder systems and other construction-related projects are generally recorded under the input method. The input method recognizes revenue on the basis of the Company’s efforts or inputs to the satisfaction of a performance obligation relative to the total inputs expected to satisfy that performance obligation. Revenue recognized on security contracts in process are based upon the allocated contract price and related total inputs of the project at completion. The extent of progress toward completion is generally measured using input methods based on labor metrics. Revisions to these estimates as contracts progress have the effect of increasing or decreasing profits each period. Provisions for anticipated losses are made in the period in which they become determinable. The revenues for monitoring and monitoring-related services are recognized as services are rendered over the contractual period.

The Company utilizes the output method for contract sales in the Oil & Gas business. The output method recognizes revenue based on direct measurements of the customer value of the goods or services transferred to date relative to the remaining goods or services promised under the contract. The output method includes methods such as surveys of performance completed to date, appraisals of results achieved, milestones reached, time elapsed, and units produced or units delivered.

Contract assets or liabilities result from transactions with revenue recorded over time. If the measure of remaining rights exceeds the measure of the remaining performance obligations the Company records a contract asset. Conversely, if the measure of the remaining performance obligations exceeds the measure of the remaining rights, the Company records a contract liability.

Incremental costs of obtaining or fulfilling a contract with a customer that are expected to be recovered are recognized and classified in Other current assets or Other assets in the Condensed Consolidated Balance Sheets and are typically amortized over the contract period. The Company recognizes the incremental costs of obtaining or fulfilling a contract as expense when incurred if the amortization period of the asset is one year or less.

Customer billings for services not yet rendered are deferred and recognized as revenue as the services are rendered. The associated deferred revenue is included in Accrued expenses or Other liabilities, as appropriate, in the Condensed Consolidated Balance Sheets.

Refer to Note D, Accounts and Notes Receivable, for further discussion.