Employee stock ownership plan operating expense.

No definition available.

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- Definition

Represents information related to number of executives under supplemental executive retirement plan (SERP).

+ References

No definition available.

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- Definition

Represent number of external directors.

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- Definition

Amount of administration expense of defined benefit plan which decreases plan assets. Excludes plan administration expense paid by employer.

+ References

No definition available.

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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

No definition available.

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- Definition

Amount of discretionary contributions made by an employer to a defined contribution plan.

+ References

No definition available.

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- Definition

Percentage employer matches of the employee's percentage contribution matched.

+ References

No definition available.

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- Definition

Maximum amount the employee may contribute to a defined contribution plan.

+ References

No definition available.

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- Definition

Description of defined contribution pension and other postretirement plans.

+ References

No definition available.

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- Definition

This item represents the amount of cash contributions during the period made by the entity to the Employee Stock Ownership Plan (ESOP).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 40
-Section 50
-Paragraph 1
-Subparagraph (a)
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- Definition

Sets forth the terms of the arrangement, including interest rate and repayment requirements, in which the employer lends funds to the ESOP. The loan amount is not required to be externally reported.

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-Publisher FASB
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-SubTopic 40
-Section 25
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- Definition

Represents the carrying amount of shares held by the ESOP as of the balance sheet date in which no ESOP participant has a vested interest and no lender has a claim.

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-Publisher FASB
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- Definition

Fair value of unearned shares held by the employee stock ownership plan (ESOP).

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- Definition

The shares that, although not legally released, will be released by a future scheduled and committed debt service payment and will be allocated to employees for service rendered in the current accounting period. The ESOP documents typically define the period of service to which the shares relate. ESOP shares are released to compensate employees directly, to settle employer liabilities for other employee benefits, and to replace dividends on allocated shares that are used for debt service.

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- Definition

Sum of the allocated, committed-to-be-released and suspense shares of the entity held by the plan.

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- Definition

Amount of liability, recognized in statement of financial position, for defined benefit pension and other postretirement plans, classified as current.

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- Definition

Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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- Definition

Net number of non-option equity instruments granted to participants.

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- Definition

Number of shares authorized for issuance under share-based payment arrangement.

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- Definition

Gross number of share options (or share units) granted during the period.

+ References

No definition available.

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- Definition

Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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No definition available.

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- Definition

Percentage of vesting of award under share-based payment arrangement.

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Employee Benefit Plans - Additional Information (Details)			6 Months Ended	12 Months Ended
	Jul. 02, 2018 $ / shares	Jan. 05, 2018 $ / shares	Jul. 02, 2018 individual shares	Dec. 31, 2019 USD ($) individual $ / shares shares	Dec. 31, 2018 USD ($) $ / shares shares	Aug. 29, 2017 shares
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Description of defined contribution pension				Employees are eligible for participation in the 401(k) Plan after one year of service and attaining age 19. The 401(k) Plan allows employees to contribute 1% to 100% of their annual salary subject to statutory limitations. Matching contributions made by the Bank are 100% of the first 6% of compensation that an employee contributes to the 401(k) Plan.
Matching contributions made by the Bank				100.00%
Matching contributions made by employees \| $				$ 217,000,000	$ 218,000,000
Discretionary contributions made \| $				55,000,000	$ 28,000,000
ESOP borrowed to purchase shares \| $				$ 700,000,000
Number of shares purchased				69,972
Employee stock ownership plan debt structure description				The loan is being repaid in twenty equal annual installments through 2026.
Total shares released to participants				3,808	3,808
Expense related to ESOP \| $				$ 66,000	$ 72,000
Number of unearned ESOP shares \| $				26,655,000
Aggregate market value of unearned ESOP shares. \| $				$ 463,264,000
Stock options granted			20,000	0
Restricted stock
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Restricted stock granted				0	8,400
2017 Equity Incentive Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Number of shares authorized for award						77,668
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price \| $ / shares				$ 0.00	$ 17.58
Stock options granted				0	20,000
2017 Equity Incentive Plan \| Restricted stock
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Number of external directors \| individual			5
Grant vesting period				5 years
Percentage of share base payment award				20.00%
Restricted stock granted				0
2017 Equity Incentive Plan \| Stock option
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Stock options granted				0
2017 Equity Incentive Plan \| Executive Officer [Member] \| Restricted stock
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Number of restricted stock awards granted			8,400
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price \| $ / shares	$ 17.75	$ 17.52
Supplemental executive retirement plan (SERP)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Number of executive under supplemental executive retirement plan (SERP) \| individual				2
Contribution recorded under supplemental executive retirement plan (SERP) \| $				$ 845,000,000	$ 826,000,000
Total expense under the SERP \| $				$ 79,000,000	$ 59,000,000