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STOCK-BASED COMPENSATION - Narratives (Detail) - USD ($)	1 Months Ended				3 Months Ended	12 Months Ended
	Oct. 31, 2024	Sep. 30, 2024	Nov. 30, 2023	Mar. 31, 2011	Dec. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022	Oct. 03, 2019	Sep. 30, 2019	Oct. 02, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-cash stock and deferred compensation expense						$ 188,000,000	$ 135,000,000	$ 153,000,000
Stock option weighted-average grant date fair value						$ 397.31	$ 251.73	$ 254.21
Unrecognized compensation cost related to non-vested awards expected to vest		$ 245,000,000				$ 245,000,000
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition						1 year 10 months 24 days
Fair value of options vested						$ 97,000,000	$ 80,000,000	$ 88,000,000
Dividend equivalent payments, current (Note 16)		180,000,000				180,000,000	19,000,000
Dividend Equivalent Payments on Certain Stock Options, Non-current		$ 47,000,000				47,000,000
Share-Based Payment Arrangement, Tax Benefit						24,000,000	15,000,000	18,000,000
Share-Based Payment Arrangement, Noncurrent Liabilities, Other						102,000,000	48,000,000
Dividend Equivalent Payments						$ 233,000,000	$ 38,000,000	$ 86,000,000
Dividends declared (in usd per share)		$ 75.00	$ 35.00			$ 110.00	$ 0	$ 18.50
Dividends					$ 1,937,000,000	$ 6,153,000,000
Dividends Payable		$ 4,216,000,000				4,216,000,000
Other Non-Current Liabilities
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-cash stock and deferred compensation expense						54,000,000	$ 23,000,000	$ 2,000,000
Additional Paid-In Capital
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-cash stock and deferred compensation expense						$ 134,000,000	112,000,000	151,000,000
2019 Stock Option Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of common stock									4,000,000
Shares available for award						3,435,370
2014 Stock Option Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of common stock											5,000,000
2006 Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of common stock				8,119,668
Restricted stock grant period in years				3 years
2003 Stock Option Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total intrinsic value of options exercised						$ 794,000,000	$ 500,000,000	$ 279,000,000
S 2025 Q1 Dividends | Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividends	$ 4,216,000,000
DE 2025 Q1 Dividends | Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividends	$ 132,000,000
Performance Vested Stock Options | 2019 Stock Option Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for award						398,729
Stock-based compensation activity (in shares)						3,521
Weighted-Average Exercise Price Per Option, Exercised						$ 631.12
Number of Options Exercisable at end of period		120,116				120,116
Weighted-Average Exercise Price Per Option, Exercisable		$ 712.29				$ 712.29
Weighted-Average Remaining Contractual Term, Exercisable, years						8 years 6 months
Aggregate Intrinsic Value, Exercisable		$ 85,863,473				$ 85,863,473
Performance Vested Stock Options | 2014 Stock Option Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for award						158,550
Stock-based compensation activity (in shares)						529,387
Weighted-Average Exercise Price Per Option, Exercised						$ 316.35
Number of Options Exercisable at end of period		2,892,840				2,892,840
Weighted-Average Exercise Price Per Option, Exercisable		$ 390.75				$ 390.75
Weighted-Average Remaining Contractual Term, Exercisable, years						4 years 6 months
Aggregate Intrinsic Value, Exercisable		$ 2,998,078,391				$ 2,998,078,391
Performance Vested Stock Options | 2006 Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for award						0
Stock-based compensation activity (in shares)						375,977
Weighted-Average Exercise Price Per Option, Exercised						$ 199.71
Number of Options Exercisable at end of period		74,215				74,215
Weighted-Average Exercise Price Per Option, Exercisable		$ 226.34				$ 226.34
Weighted-Average Remaining Contractual Term, Exercisable, years						1 year 1 month 6 days
Aggregate Intrinsic Value, Exercisable		$ 89,116,630				$ 89,116,630
Restricted Stock Units (RSUs) | 2006 Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number										0

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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