Effective Income Tax Rate Reconciliation, Coronavirus Aid, Relief, and Economic Security Act, Amount

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Effective Income Tax Rate Reconciliation, Federal Return To Provision Adjustments

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Effective Income Tax Rate Reconciliation, Statute Of Limitations, Amount

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Unrecognized Income Tax Expense, Change in Tax Regulations

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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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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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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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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 the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to revisions of previously reported income tax expense (benefit).

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Amount of increase (decrease) to previously recorded tax expense. Includes, but is not limited to, significant settlements of income tax disputes, and unusual tax positions or infrequent actions taken by the entity, including tax assessment reversal, and IRS tax settlement.

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Income Taxes - Additional Information (Detail) - USD ($) $ in Millions		3 Months Ended
	Jun. 18, 2019	Mar. 31, 2021	Mar. 31, 2020
Income Tax Contingency [Line Items]
Effective income tax rate		29.40%	13.80%
Federal statutory income tax rate		21.00%	21.00%
Tax expense for return to provision adjustment		$ 1
Discrete tax benefit related to the statute of limitations			$ (15)
Tax benefit due to prior period adjustments			(8)
Federal return to provision adjustments			27
Excess tax expense, share-based payment arrangement			7
Tax due to adoption of CARES Act			$ 5
Minimum \| Internal Revenue Service \| 2018 Tax Year
Income Tax Contingency [Line Items]
Unrecognized income tax expense due to change in tax regulations	$ 180
Maximum \| Internal Revenue Service \| 2018 Tax Year
Income Tax Contingency [Line Items]
Unrecognized income tax expense due to change in tax regulations	$ 220