Share-Based Compensation - Summary of SARs Outstanding (Detail) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Sep. 30, 2022 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
SARs, beginning balance (shares)	6,295
SARs, granted (shares)	909
SARs, exercised (shares)	(1,408)
SARs, forfeited, canceled or expired (shares)	(191)
Embecta spin-off adjustment (shares)	(159)
Adjustments to BD awards related to the spin-off of Embecta (shares)	97
SARs, ending balance (shares)	5,544
SARs, Vested and expected to vest at ending balance (shares)	5,377
SARs, Exercisable at ending balance (shares)	3,877
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
SARs, weighted average exercise price, beginning balance (USD per share) | $ / shares	$ 179.64
SARs, weighted average exercise price, granted (USD per share) | $ / shares	245.09
SARs, weighted average exercise price, exercised (USD per share) | $ / shares	125.57
SARs, weighted average exercise price, forfeited, canceled or expired (USD per share) | $ / shares	234.50
Embecta spin-off adjustment (USD per share) | $ / shares	239.77
SARs, weighted average exercise price, ending balance (USD per share) | $ / shares	197.31
SARs, weighted average exercise price, vested and expected to vest (USD per share) | $ / shares	196.10
SARs, weighted average exercise price, exercisable (USD per share) | $ / shares	$ 180.47
SARs, weighted average remaining contractual term	5 years 7 months 28 days
SARs, weighted average remaining contractual term, vested and expected to vest	5 years 6 months 29 days
SARs, weighted average remaining contractual term, exercisable	4 years 6 months 3 days
SARs, aggregate intrinsic value | $	$ 183
SARs, aggregate intrinsic value, vested and expected to vest | $	183
SARs, aggregate intrinsic value, exercisable | $	$ 183