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Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Income Tax Disclosure [Abstract]
Income tax expense (benefit) related to continuing operations	$ 26	$ 150
Reported income tax expense (benefit) rates (percent)	4.60%	23.30%
Unrecognized tax benefits	$ 1,700
Unrecognized tax benefits that would reduce income tax expense and the effective tax rate	1,300
Discrete tax benefit recognized	$ 97

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- Definition

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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-Name Accounting Standards Codification
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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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