Basis of Presentation and Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2022
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying financial statements reflect the consolidated operations of Insulet Corporation and its subsidiaries (“Insulet” or the “Company”). The unaudited consolidated financial statements have been prepared in United States dollars, in accordance with accounting principles generally accepted in the United States of America (“GAAP”). The preparation of the consolidated financial statements in conformity with GAAP requires management to make use of estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities, and the reported amounts of revenues and expenses. Actual results may differ from those estimates. In management’s opinion, the unaudited consolidated financial statements contain all normal recurring adjustments necessary for a fair statement of the interim results reported. Operating results for the nine months ended September 30, 2022 are not necessarily indicative of the results that may be expected for the full year ending December 31, 2022, or for any other subsequent interim period. The year-end balance sheet data was derived from audited consolidated financial statements. These unaudited consolidated financial statements do not include all of the annual disclosures required by GAAP; accordingly, they should be read in conjunction with the Company’s audited consolidated financial statements contained in the Company’s Annual Report on Form 10-K for the year ended December 31, 2021.
Reclassification of Prior Period Amounts	Reclassification of Prior Period Amounts Certain reclassifications have been made to prior period amounts to conform to the current period financial statement presentation. The Company reclassified the change in unbilled receivables from the change in prepaid expenses and other current assets to the change in accounts receivable in the prior year statement of cash flows in the amount of $4.5 million. There was no change to previously reported net cash used in operating activities.
Investments	InvestmentsThe Company has investments in privately-held companies in which the Company’s interest is less than 20%, the Company does not exercise significant influence over the investee, and the investment does not have a readily determinable fair value. These investments are carried at cost less impairment, if any. If an observable price change is identified, the investment is measured at its fair value as of the date that the observable transaction occurred with the adjustments reflected in other (expense) income in the Company’s consolidated statements of operations.
Shipping and Handling costs	Shipping and Handling CostsShipping and handling costs included in selling, general and administrative expenses
Fair Value Measurements	Fair Value Measurements Fair value is defined as the price that would be received from the sale of an asset or paid to transfer a liability in the principal or most advantageous market in an orderly transaction between market participants on the measurement date. To measure fair value of assets and liabilities, the Company uses the following fair value hierarchy based on three levels of inputs: Level 1—observable inputs, such as quoted prices in active markets for identical assets or liabilities; Level 2—significant other observable inputs that are observable either directly or indirectly; and Level 3—significant unobservable inputs for which there are little or no market data, which require the Company to develop its own assumptions. Certain of the Company’s financial instruments, including cash and cash equivalents, accounts receivable, accounts payable, accrued expenses and other liabilities are carried at cost, which approximates their fair value because of their short-term maturity.
Recently Adopted Accounting Standards	Recently Adopted Accounting StandardEffective January 1, 2022, the Company adopted Accounting Standards Update (“ASU”) 2020-06, Debt - Debt With Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging - Contracts in Entity’s Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity using the modified retrospective method for convertible debt instruments outstanding as of the date of adoption. Under ASU 2020-06, a convertible debt instrument is generally reported as a single liability at its amortized cost with no separate accounting for embedded conversion features. Consequently, the effective interest rate of convertible debt instruments is closer to the coupon interest rate under the new guidance.
Product Warranty Costs	Product Warranty CostsThe Company provides a four-year warranty on Personal Diabetes Managers (“PDMs”) and Controllers sold in the United States and PDMs sold in Europe, a five-year warranty on PDMs sold in Canada, and may replace Pods that do not function in accordance with product specifications. The Company estimates its warranty obligation at the time the product is shipped based on historical experience and the estimated cost to service the claims. Since the Company continues to introduce new products and versions, the anticipated performance of the product over the warranty period is also considered in estimating warranty reserves. Warranty expense is recorded in cost of revenue in the consolidated statements of operations. Cost to service the claims reflects the current product cost.