Revenues	12 Months Ended
Revenues	Sep. 30, 2019
Revenue from Contract with Customer [Abstract]
Revenue	Revenues As previously discussed in Note 2, the Company adopted ASC 606 using the modified retrospective method. The Company sells a broad range of medical supplies, devices, laboratory equipment and diagnostic products which are distributed through independent distribution channels and directly by BD through sales representatives. End-users of the Company's products include healthcare institutions, physicians, life science researchers, clinical laboratories, the pharmaceutical industry and the general public. Timing of Revenue Recognition The Company's revenues are primarily recognized when the customer obtains control of the product sold, which is generally upon shipment or delivery, depending on the delivery terms specified in the sales agreement. Revenues associated with certain instruments and equipment for which installation is complex, and therefore significantly affects the customer’s ability to use and benefit from the product, are recognized when customer acceptance of these installed products has been confirmed. For certain service arrangements, including extended warranty and software maintenance contracts, revenue is recognized ratably over the contract term. The majority of revenues relating to extended warranty contracts associated with certain instruments and equipment is generally recognized within a few years whereas deferred revenue relating to software maintenance contracts is generally recognized over a longer period. Measurement of Revenues The Company acts as the principal in substantially all of its customer arrangements and as such, generally records revenues on a gross basis. Revenues exclude any taxes that the Company collects from customers and remits to tax authorities. The Company considers its shipping and handling costs to be costs of contract fulfillment and has made the accounting policy election to record these costs within Selling and administrative expense. Payment terms extended to the Company's customers are based upon commercially reasonable terms for the markets in which the Company's products are sold. Because the Company generally expects to receive payment within one year or less from when control of a product is transferred to the customer, the Company does not generally adjust its revenues for the effects of a financing component. The Company’s estimate of probable credit losses relating to trade receivables is determined based on historical experience and other specific account data. Amounts are written off against the allowances for doubtful accounts when the Company determines that a customer account is uncollectible. Such amounts are not material to the Company's consolidated financial results. The Company's gross revenues are subject to a variety of deductions which are recorded in the same period that the underlying revenues are recognized. Such variable consideration include rebates, sales discounts and sales returns. Because these deductions represent estimates of the related obligations, judgment is required when determining the impact of these revenue deductions on gross revenues for a reporting period. Rebates provided by the Company are based upon prices determined under the Company's agreements with its end-user customers. Additional factors considered in the estimate of the Company's rebate liability include the quantification of inventory that is either in stock at or in transit to the Company's distributors, as well as the estimated lag time between the sale of product and the payment of corresponding rebates. The impact of other forms of variable consideration, including sales discounts and sales returns, is not material to the Company's revenues. Additional disclosures relating to sales discounts and sales returns are provided in Note 19. The Company's agreements with customers within certain organizational units including Medication Management Solutions, Diagnostic Systems and Biosciences, contain multiple performance obligations including both products and certain services noted above. The transaction price for these agreements is allocated to each performance obligation based upon its relative standalone selling price. Standalone selling price is the amount at which the Company would sell a promised good or service separately to a customer. The Company generally estimates standalone selling prices using its list prices and a consideration of typical discounts offered to customers. Effects of Revenue Arrangements on Consolidated Balance Sheet Due to the nature of the majority of the Company's products and services, the Company typically does not incur costs to fulfill a contract in advance of providing the customer with goods or services. Capitalized contract costs associated with the costs to fulfill contracts for certain products in the Medication Management Solutions organizational unit are immaterial to the Company's consolidated balance sheets. The Company's costs to obtain contracts are comprised of sales commissions which are paid to the Company's employees or third party agents. The majority of the sales commissions incurred by the Company relate to revenue that is recognized over a period that is less than one year and as such, the Company has elected a practical expedient provided under ASC 606 to record the majority of its expense associated with sales commissions as it is incurred. Commissions relating to revenues recognized over a period longer than one year are recorded as assets which are amortized over the period over which the revenues underlying the commissions are recognized. Capitalized contract costs related to such commissions are immaterial to the Company's consolidated balance sheets. The Company records contract liabilities for unearned revenue that is allocable to performance obligations, such as extended warranty and software maintenance contracts, which are performed over time as discussed further above. These contract liabilities are immaterial to the Company's consolidated financial results. The Company's liability for product warranties provided under its agreements with customers is not material to its consolidated balance sheets. Remaining Performance Obligations The Company's obligations relative to service contracts, which are further discussed above, and pending installations of equipment, primarily in the Company's Medication Management Solutions unit, represent unsatisfied performance obligations of the Company. The revenues under existing contracts with original expected durations of more than one year, which are attributable to products and/or services that have not yet been installed or provided, are estimated to be approximately $1.8 billion at September 30, 2019. The Company expects to recognize the majority of this revenue over the next three years. Within the Company's Medication Management Solutions, Medication Delivery Solutions, Diagnostic Systems, and Biosciences units, some contracts also contain minimum purchase commitments of reagents or other consumables and the future sales of these consumables represent additional unsatisfied performance obligations of the Company. The revenue attributable to the unsatisfied minimum purchase commitment-related performance obligations, for contracts with original expected durations of more than one year, is estimated to be approximately $2.8 billion at September 30, 2019. This revenue will be recognized over the customer relationship period. Disaggregation of Revenues A disaggregation of the Company's revenues by segment, organizational unit and geographic region is provided in Note 7.