Income Taxes (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
	Jun. 18, 2019	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Tax Contingency [Line Items]
Effective income tax rate		19.70%	18.90%	18.30%	22.50%
Federal statutory income tax rate		21.00%	21.00%	21.00%	21.00%
Tax exempt income		$ 11	$ 13	$ 4	$ 9
Sale of business unit				15
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