Basis of Presentation and Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2025
Accounting Policies [Abstract]
Basis of Presentation and Summary of Significant Accounting Policies	Basis of Presentation and Summary of Significant Accounting Policies Basis of Presentation The accompanying unaudited financial statements reflect the consolidated income of Insulet Corporation and its subsidiaries (“Insulet” or the “Company”). The unaudited condensed 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 condensed 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, 2025 are not necessarily indicative of the results that may be expected for the full year ending December 31, 2025, or for any other subsequent interim period. Columns and rows within tables may not add due to rounding. The year-end balance sheet data was derived from the audited consolidated financial statements. These unaudited condensed 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, 2024. Related Party Transactions One of the members of the Company’s Board of Directors was married to an executive officer of one of the Company’s distributors. The terms of the distribution agreement are consistent with those prevailing at arm’s length. Shipping and Handling Costs Shipping and handling costs included in selling, general and administrative expenses were $6.3 million and $4.5 million for the three months ended September 30, 2025 and 2024, respectively, and were $16.2 million and $11.9 million for the nine months ended September 30, 2025 and 2024, respectively. Advertising Costs Advertising costs were $49.0 million and $28.3 million for the three months ended September 30, 2025 and 2024, respectively, and were $86.7 million and $60.2 million for the nine months ended September 30, 2025 and 2024, respectively. Advertising costs are included in selling, general and administrative expenses. 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 input: 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. Judgment is involved in estimating inputs, such as discount rates, used in Level 3 fair value measurements. Changes to these inputs can have a significant effect on fair value measurements and amounts that could be realized. 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.