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Income Taxes - Additional Information (Detail) - USD ($) $ in Millions |  | 3 Months Ended
--- | --- | ---
Jun. 18, 2019 | Mar. 31, 2022 | Mar. 31, 2021
Income Tax Contingency [Line Items] |  |  |
Effective income tax rate |  | 17.00% | 29.40%
Federal statutory income tax rate |  | 21.00% | 21.00%
Tax exempt income |  | $ 4 | $ 1
Sale of business unit |  | 14 |
Increase in income taxes receivable, noncurrent |  | 261 |
Decrease in income taxes payable |  | 95 |
Increase in deferred tax liabilities |  | $ 356 |
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 |  |

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- Definition 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 the disposition of a business not qualifying as a discontinued operation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32687-109319 + Details
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