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Income Tax - Gross Deferred Tax Assets on Tax Loss Carryforwards and Investment Credits Expiration (Detail) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
2023	$ 3
2024	2
2025	2
2026	2
2027	5
Thereafter	506
Total	$ 520	$ 707

X

- Definition

Deferred tax assets on tax loss carryforwards and investment credits expiration thereafter.

+ References

No definition available.

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- Definition

Deferred tax assets on tax loss carryforwards and investment credits expiration year five.

+ References

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- Definition

Deferred tax assets on tax loss carryforwards and investment credits expiration year four.

+ References

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- Definition

Deferred tax assets on tax loss carryforwards and investment credits expiration year one.

+ References

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- Definition

Deferred tax assets on tax loss carryforwards and investment credits expiration year three.

+ References

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- Definition

Deferred tax assets on tax loss carryforwards and investment credits expiration year two.

+ References

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- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 8
-URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32632-109319

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 6
-URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32621-109319

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