Revenues (Details) - USD ($) $ in Millions	Mar. 31, 2022	Sep. 30, 2021
Disaggregation of Revenue [Line Items]
Rebate liability	$ 585	$ 576
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-04-01
Disaggregation of Revenue [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction (in years)	3 years
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-04-01 | Products and/or Services
Disaggregation of Revenue [Line Items]
Revenue, remaining performance obligation, amount	$ 2,200
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-04-01 | Consumables
Disaggregation of Revenue [Line Items]
Revenue, remaining performance obligation, amount	$ 2,400