The number of days which stock purchased in the employee stock purchase plan must be held by the employee.

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- Definition

Number of performance periods for which market-based restricted stock will be measured for vesting purposes

+ References

No definition available.

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- Definition

Share Based Compensation Arrangement, By Share Based Payment Award, Potential Performance Award, Percentage

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No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period once Earned

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No definition available.

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- Definition

Minimum period the individual is required to perform services to be fully vested under the deferred compensation arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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-Name Accounting Standards Codification
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- Definition

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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- Definition

The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity.

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-Publisher FASB
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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

Discount rate from fair value on purchase date that participants pay for shares.

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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).

+ References

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- Definition

Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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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

The highest percentage of annual salary that an employee is permitted to utilize with respect to the plan.

+ References

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- Definition

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

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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- Definition

Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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- Definition

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

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- Definition

Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Share-Based Compensation Plans - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($) performance_period shares	Dec. 31, 2018 USD ($) shares	Dec. 31, 2017 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized pre-tax compensation expense \| $	$ 31
Unrecognized compensation costs weighted-average period	1 year 9 months 18 days
Total fair value of equity awards \| $	$ 20	$ 18	$ 22
Unused shares (in shares)	4,200,000
Shares authorized under stock option plans, exercise price range	10 years
Number of performance periods for market-based restricted stock \| performance_period	3
Total intrinsic value of options exercised \| $	$ 0	3	5
Total cash received from employees under compensation arrangements \| $	$ 8	$ 17	$ 21
Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Requisite service period	1 year
Time Vested Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation plan, vesting period	3 years
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation plan, vesting period	3 years
ROC Performance Based Restricted Stock Rights \| Time Vested Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation plan, vesting period	1 year
Award vesting period once earned	3 years
ROC Performance Based Restricted Stock Rights \| Market Based Cash Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation plan, vesting period	3 years
Stock Option And Nonvested Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized (shares)	4,300,000
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized (shares)	5,500,000
Unused shares (in shares)	400,000
Percentage of payroll deductions of eligible compensation	15.00%
Percentage of share purchased fair market value	85.00%
Performance Based Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	79,000	98,000	79,000
ROC/COC Performance Based Restricted Stock Rights
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation plan, vesting period	3 years
Granted (in shares)	74,000	51,000
SRG, Performance Based Restricted Stock Rights
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation plan, vesting period	3 years
Granted (in shares)	74,000	51,000
Maximum \| ROC Performance Based Restricted Stock Rights
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Potential performance award percentage	150.00%
Maximum \| Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee stock purchase plan holding period	1 year
Maximum \| ROC/COC Performance Based Restricted Stock Rights
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Potential performance award percentage	200.00%
Maximum \| SRG, Performance Based Restricted Stock Rights
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Potential performance award percentage	200.00%
Minimum \| Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee stock purchase plan holding period	90 days
Year One \| Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rate (as a percent)	33.33%
Year One \| ROC Performance Based Restricted Stock Rights \| Market Based Cash Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation plan, vesting period	1 year
Year Two \| Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rate (as a percent)	33.33%
Year Two \| ROC Performance Based Restricted Stock Rights \| Market Based Cash Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation plan, vesting period	2 years
Year Three \| Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rate (as a percent)	33.33%
Year Three \| ROC Performance Based Restricted Stock Rights \| Market Based Cash Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation plan, vesting period	3 years