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Income Taxes - Reconciliation Of Statutory Rate To Effective Rate (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Amount
Federal income tax at statutory rate	$ 814	$ 531	$ 733
State income taxes, net of federal tax effect	109	85	110
Excess tax benefits on stock-based compensation	(25)	(39)	(29)
Other, net	(25)	(60)	(45)
Income taxes	$ 873	$ 517	$ 769
Percent
Federal income tax at statutory rate	21.00%	21.00%	21.00%
State income taxes, net of federal tax effect	2.80%	3.30%	3.10%
Excess tax benefits associated with stock-based compensation, net of federal tax effect	(0.60%)	(1.50%)	(0.80%)
Other, net	(0.70%)	(2.40%)	(1.30%)
Provision for income taxes	22.50%	20.40%	22.00%

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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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