Income Taxes - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Mar. 31, 2019
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 104	$ 22
Effective tax rate	22.00%	19.00%
Deferred tax assets	$ 2,100		$ 2,900
Net deferred income tax liability	$ 5,501		$ 5,452

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

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Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences without jurisdictional netting.

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

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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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