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Income Taxes - Summary of Temporary Differences of Deferred Tax Assets and Liabilities (Parenthetical) (Details) $ in Millions	Sep. 30, 2019 USD ($)
Tax Credit Carryforward [Line Items]
Goodwill expected to be deductible for tax purposes	$ 8
Foreign Tax Authority [Member]
Tax Credit Carryforward [Line Items]
Operating Loss Carryforwards	133
Tax credits	4
State and Local Jurisdiction [Member]
Tax Credit Carryforward [Line Items]
Operating Loss Carryforwards	900
Operating loss carryforwards expiring in next fiscal year	48
Operating loss carryforwards expiring in fiscal year two	$ 57

X

- Definition

The tax effect as of the balance sheet date of the amount of excess of tax deductions over gross income in a year which cannot be used on the tax return of a country outside the country of domicile in the current year but can be carried forward to reduce taxable income or income taxes payable in a future year, for which there must be sufficient tax-basis income to utilize a portion or all of the carryforward amount to realize the deferred tax asset, set to expire in fiscal year two.

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- Definition

The tax effect as of the balance sheet date of the amount of excess of tax deductions over gross income in a year which cannot be used on the tax return of a country outside the country of domicile in the current year but can be carried forward to reduce taxable income or income taxes payable in a future year, for which there must be sufficient tax-basis income to utilize a portion or all of the carryforward amount to realize the deferred tax asset, set to expire in the next fiscal year.

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- Definition

Amount of deferred tax liability attributable to taxable temporary differences from goodwill.

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- Definition

Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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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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