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Income Taxes (Narrative) (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Effective income tax rates	22.10%	24.00%	23.20%	23.80%
Liability for income taxes associated with uncertain tax positions	$ 8		$ 8		$ 8
Offsetting Tax Benefits To Liability For Income Taxes Associated With Uncertain Tax Positions	$ 3		3		3
Other tax benefits related to interest and penalties of uncertain tax positions			$ 0		$ 0
Unrecognized tax positions increase decrease, months			It is reasonably possible that the unrecognized benefit with respect to certain of the Company’s unrecognized tax positions may increase or decrease within the next 12 months.  Any such change may be the result of either ongoing audits or the expiration of federal and state statutes of limitations for the assessment of taxes

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- Definition

Offsetting tax benefits to liability for income taxes associated with uncertain tax positions.

+ References

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
-URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32687-109319

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Amount of other current and other deferred income tax expense (benefit) attributable to continuing operations.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 10
-URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32672-109319

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Other information relative to a tax position which it is reasonably possible that the total amount of the unrecognized tax benefit will significantly increase or decrease within twelve months of the balance sheet date.

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Amount of unrecognized tax benefits.

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