Number Of Share-Based Compensation Plans

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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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SHARE-BASED AND OTHER COMPENSATION, Share-based Compensation Plans (Details) - Stock Incentive Plan 2012 $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2020 USD ($) plan $ / shares shares	Mar. 31, 2019 USD ($)	Mar. 31, 2020 USD ($) plan $ / shares shares	Mar. 31, 2019 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of share-based compensation plans \| plan	1		1
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	100		1,600
RSUs granted during period, weighted-average grant-date fair value (in usd per share) \| $ / shares	$ 79.73		$ 88.53
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	$ 27	$ 23	$ 67	$ 61
Total pre-tax compensation costs not yet recognized, net of forfeitures	$ 216		$ 216
Compensation costs not yet recognized, period of recognition			3 years 4 months 24 days