Measurement Periods for Performance based Restricted Stock

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Percentage range of shares received at vesting for stock units based on our total stockholder return ("TSR") relative to the performance of companies in the NASDAQ-100 Index for each measurement period.

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- Definition

Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.

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Amount of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to expense for award under share-based payment arrangement. Excludes expense determined to be nondeductible upon grant or after for award under share-based payment arrangement.

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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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- Definition

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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Amount of stock repurchase plan authorized.

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Stock-Based Compensation (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Aug. 31, 2022
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Measurement periods for performance based restricted stock	3 years		3 years
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Measurement periods for performance based restricted stock	4 years		4 years
Market-Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to stock options and restricted stock rights	$ 18		$ 18
Market-Based Restricted Stock Units \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage range of shares received at vesting based on total stockholder return ("TSR")	0.00%		0.00%
Market-Based Restricted Stock Units \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage range of shares received at vesting based on total stockholder return ("TSR")	200.00%		200.00%
Performance Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to stock options and restricted stock rights	$ 35		$ 35
Performance Based Restricted Stock Units \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage range of shares received at vesting based on total stockholder return ("TSR")	0.00%		0.00%
Performance Based Restricted Stock Units \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage range of shares received at vesting based on total stockholder return ("TSR")	200.00%		200.00%
Restricted Stock Rights
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to stock options and restricted stock rights	$ 982		$ 982
Weighted-average service period			2 years
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to stock options and restricted stock rights	929		$ 929
August 2022 Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Amount of common stock authorized for repurchase					$ 2,600
November 2020 Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Amount of common stock authorized for repurchase					$ 2,600
Stock-based compensation expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred income tax expense (benefit)	$ 21		$ 50	$ 45
Effective income tax rate reconciliation, tax expense (benefit), share-based payment arrangement, amount		$ 24