Employee Benefit Plan, Schedule, Asset Held for Investment (Details) - EPB 012 [Member] $ in Millions	12 Months Ended
Dec. 31, 2025 USD ($)
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]
Employee Benefit Plan, Investment, Issuer Name [Extensible Enumeration]	Investment, Issuer Name, Other [Member]
Employee Benefit Plan, Asset Held for Investment, Plan Interest in Master Trust, Current Value	$ 3,603
Employee Benefit Plan, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration]	Employee Benefit Plan, Participant-Directed [Member]
Employee Benefit Plan, Asset Held for Investment, Participant Loan, after Deemed Distribution	$ 32
Employee Benefit Plan, Plan Number	012
Entity Tax Identification Number	63-0589368
Employee Benefit Plan, Asset Held for Investment, Party-in-Interest [true false]	true
Investment, Identifier [Axis]: Atlanta Capital SMID-Cap Fund
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]
Employee Benefit Plan, Asset Held for Investment, Plan Interest in Master Trust, Current Value	$ 91
Investment, Identifier [Axis]: Dodge & Cox Income Fund
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]
Employee Benefit Plan, Asset Held for Investment, Plan Interest in Master Trust, Current Value	93
Investment, Identifier [Axis]: Dodge & Cox International Stock Fund
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]
Employee Benefit Plan, Asset Held for Investment, Plan Interest in Master Trust, Current Value	172
Investment, Identifier [Axis]: EB US Small-Mid Cap Growth Equity Fund
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]
Employee Benefit Plan, Asset Held for Investment, Plan Interest in Master Trust, Current Value	108
Investment, Identifier [Axis]: Harding Loevner International Equity
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]
Employee Benefit Plan, Asset Held for Investment, Plan Interest in Master Trust, Current Value	6
Investment, Identifier [Axis]: Morley Stable Value Fund
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]
Employee Benefit Plan, Asset Held for Investment, Plan Interest in Master Trust, Current Value	238
Investment, Identifier [Axis]: PIMCO All Asset Fund
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]
Employee Benefit Plan, Asset Held for Investment, Plan Interest in Master Trust, Current Value	19
Investment, Identifier [Axis]: Pioneer Bond Fund
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]
Employee Benefit Plan, Asset Held for Investment, Plan Interest in Master Trust, Current Value	51
Investment, Identifier [Axis]: Pioneer Large Cap Core Equity Trust
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]
Employee Benefit Plan, Asset Held for Investment, Plan Interest in Master Trust, Current Value	153
Investment, Identifier [Axis]: Pioneer US Balanced Trust
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]
Employee Benefit Plan, Asset Held for Investment, Plan Interest in Master Trust, Current Value	142
Investment, Identifier [Axis]: Regions Common Stock Fund
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]
Employee Benefit Plan, Asset Held for Investment, Plan Interest in Master Trust, Current Value	340
Investment, Identifier [Axis]: T. Rowe Price Large Cap Growth
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]
Employee Benefit Plan, Asset Held for Investment, Plan Interest in Master Trust, Current Value	396
Investment, Identifier [Axis]: T. Rowe Price Retirement 2005 Trust
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]
Employee Benefit Plan, Asset Held for Investment, Plan Interest in Master Trust, Current Value	4
Investment, Identifier [Axis]: T. Rowe Price Retirement 2010 Trust
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]
Employee Benefit Plan, Asset Held for Investment, Plan Interest in Master Trust, Current Value	2
Investment, Identifier [Axis]: T. Rowe Price Retirement 2015 Trust
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]
Employee Benefit Plan, Asset Held for Investment, Plan Interest in Master Trust, Current Value	7
Investment, Identifier [Axis]: T. Rowe Price Retirement 2020 Trust
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]
Employee Benefit Plan, Asset Held for Investment, Plan Interest in Master Trust, Current Value	26
Investment, Identifier [Axis]: T. Rowe Price Retirement 2025 Trust
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]
Employee Benefit Plan, Asset Held for Investment, Plan Interest in Master Trust, Current Value	75
Investment, Identifier [Axis]: T. Rowe Price Retirement 2030 Trust
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]
Employee Benefit Plan, Asset Held for Investment, Plan Interest in Master Trust, Current Value	123
Investment, Identifier [Axis]: T. Rowe Price Retirement 2035 Trust
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]
Employee Benefit Plan, Asset Held for Investment, Plan Interest in Master Trust, Current Value	169
Investment, Identifier [Axis]: T. Rowe Price Retirement 2040 Trust
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]
Employee Benefit Plan, Asset Held for Investment, Plan Interest in Master Trust, Current Value	165
Investment, Identifier [Axis]: T. Rowe Price Retirement 2045 Trust
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]
Employee Benefit Plan, Asset Held for Investment, Plan Interest in Master Trust, Current Value	173
Investment, Identifier [Axis]: T. Rowe Price Retirement 2050 Trust
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]
Employee Benefit Plan, Asset Held for Investment, Plan Interest in Master Trust, Current Value	143
Investment, Identifier [Axis]: T. Rowe Price Retirement 2055 Trust
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]
Employee Benefit Plan, Asset Held for Investment, Plan Interest in Master Trust, Current Value	105
Investment, Identifier [Axis]: T. Rowe Price Retirement 2060 Trust
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]
Employee Benefit Plan, Asset Held for Investment, Plan Interest in Master Trust, Current Value	65
Investment, Identifier [Axis]: T. Rowe Price Retirement 2065 Trust
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]
Employee Benefit Plan, Asset Held for Investment, Plan Interest in Master Trust, Current Value	18
Investment, Identifier [Axis]: Vanguard Institutional Index Fund
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]
Employee Benefit Plan, Asset Held for Investment, Plan Interest in Master Trust, Current Value	411
Investment, Identifier [Axis]: Vanguard Windsor II Fund
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]
Employee Benefit Plan, Asset Held for Investment, Plan Interest in Master Trust, Current Value	187
Investment, Identifier [Axis]: Victory Integrity Small Mid Cap Value
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]
Employee Benefit Plan, Asset Held for Investment, Plan Interest in Master Trust, Current Value	$ 89

The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 12
-Subsection b-2

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Balance Type:	na
Period Type:	duration

- Definition

Indicates status of participation by participant for investment, excluding plan interest in master trust, in schedule of asset held for investment of employee stock purchase, saving, or similar plan.

+ References

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

Amount, after deemed distribution, of participant loan in schedule of asset held for investment of employee stock purchase, saving, or similar plan.

+ References

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Indicates (true false) whether schedule of asset held for investment of employee stock purchase, saving, or similar plan was transacted with party-in-interest.

+ References

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:booleanItemType
Balance Type:	na
Period Type:	instant

- Definition

Current value of plan interest in master trust in schedule of asset held for investment of employee stock purchase, saving, or similar plan.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-05(a)(Schedule I))
-SubTopic 205
-Topic 962
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 10
-Paragraph b
-Subparagraph (1)(i)(D)
-Publisher DOL-EBSA

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Indicates name of issuer of investment held by employee stock purchase, saving, or similar plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-05(a)(Schedule I))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 6
-Paragraph d
-Subparagraph (1)(i)
-Publisher DOL-EBSA

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 10
-Paragraph b
-Subparagraph (2)(i)(A)
-Publisher DOL-EBSA

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 10
-Paragraph b
-Subparagraph (1)(i)(A)
-Publisher DOL-EBSA

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	enum2:enumerationSetItemType
Balance Type:	na
Period Type:	duration

- Definition

Plan number of employee stock purchase, saving, or similar plan, in three-digit numeric format.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-05(a)(Schedule II))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 10
-Paragraph b
-Subparagraph (4)
-Publisher DOL-EBSA

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 10
-Paragraph b
-Subparagraph (3)
-Publisher DOL-EBSA

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-05(a)(Schedule I))
-SubTopic 205
-Topic 962
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-05(a)(Schedule III))
-SubTopic 205
-Topic 962
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 6
-Paragraph d
-Subparagraph (1)
-Publisher DOL-EBSA

Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 10
-Paragraph b
-Subparagraph (1)
-Publisher DOL-EBSA

Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 10
-Paragraph b
-Subparagraph (2)
-Publisher DOL-EBSA

Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 6
-Paragraph d
-Subparagraph (2)
-Publisher DOL-EBSA

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Balance Type:	na
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 10
-Paragraph b
-Subparagraph (1)(i)(B)
-Publisher DOL-EBSA

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-05(a)(Schedule I))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 10
-Paragraph b
-Subparagraph (1)(i)(A)
-Publisher DOL-EBSA

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 10
-Paragraph b
-Subparagraph (1)(i)(D)
-Publisher DOL-EBSA

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 10
-Paragraph b
-Subparagraph (1)(i)(C)
-Publisher DOL-EBSA

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