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