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- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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- Definition

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards.

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Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one.

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SHARE-BASED COMPENSATION, Share-based Compensation Plans (Details) $ / shares in Units, shares in Thousands, $ in Millions		3 Months Ended			6 Months Ended
	Sep. 21, 2021	Mar. 31, 2022 USD ($) plan $ / shares shares	Sep. 30, 2021	Mar. 31, 2021 USD ($) $ / shares shares	Mar. 31, 2022 USD ($) plan $ / shares shares	Mar. 31, 2021 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock split ratio	1.5		1.5
Stock Incentive Plan 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of share-based compensation plans \| plan		1			1
Stock Incentive Plan 2012 \| Employees and Outside Members of the Board of Directors \| Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSUs granted during period (in shares) \| shares		550		225	2,900	2,300
RSUs granted during period, weighted-average grant-date fair value (in usd per share) \| $ / shares		$ 107.06		$ 77.82	$ 98.86	$ 62.42
Stock Incentive Plan 2012 \| Employees and Member of the Board of Directors \| Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation expense for restricted equity awards		$ 41		$ 30	$ 105	$ 72
Total pre-tax compensation costs not yet recognized, net of forfeitures		$ 348			$ 348
Compensation costs not yet recognized, period of recognition					3 years 2 months 12 days