The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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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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The weighted average fair value at grant date for nonvested equity-based awards issued 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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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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-Publisher FASB
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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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No definition available.

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The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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-Publisher FASB
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-Topic 718
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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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No definition available.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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-Section 50
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- Definition

The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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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.

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No definition available.

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The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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Number of share instruments newly issued under a share-based compensation plan.

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- Definition

The average discount rate applied to insurance contracts to determine future policy benefits to be paid to or on behalf of policyholders.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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Share-Based Compensation Plans Share-Based Compensation - Activity - RSU, PSU, MSU, DSU (Details) - $ / shares	6 Months Ended	12 Months Ended
	Jun. 30, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Weighted-Average Grant Date Fair Value Per Share
Target shares (shares)		5,700,000
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Discount percent		2.00%	2.00%	2.00%
Shares (in thousands)
Nonvested, beginning balance (shares)		235,800
Granted (shares)		93,900
Forfeited (shares)		(11,100)
Vested (shares)		(145,900)
Nonvested, ending balance (shares)		172,700	235,800
Weighted-Average Grant Date Fair Value Per Share
Nonvested, beginning balance (in dollars per share)		$ 52.63
Granted (in dollars per share)		78.28	$ 72.31	$ 55.85
Forfeited (in dollars per share)		71.75
Vested (in dollars per share)		45.34
Nonvested, ending balance (in dollars per share)		$ 71.87	$ 52.63
Performance Shares Units PSU
Shares (in thousands)
Nonvested, beginning balance (shares)		697,300
Granted (shares)		204,600
Forfeited (shares)		(21,600)
Vested (shares)		(316,100)
Nonvested, ending balance (shares)		564,200	697,300
Weighted-Average Grant Date Fair Value Per Share
Nonvested, beginning balance (in dollars per share)		$ 47.74
Granted (in dollars per share)		81.48
Forfeited (in dollars per share)		71.70
Vested (in dollars per share)		32.35
Nonvested, ending balance (in dollars per share)		$ 70.10	$ 47.74
Actual shares earned and distributed (shares)	129,100		225,900
Target shares (shares)	129,100		187,000.0
Deferred Stock Units
Shares (in thousands)
Nonvested, beginning balance (shares)		12,500
Granted (shares)		12,100
Vested (shares)		(12,500)
Nonvested, ending balance (shares)		12,100	12,500
Weighted-Average Grant Date Fair Value Per Share
Nonvested, beginning balance (in dollars per share)		$ 74.43
Granted (in dollars per share)		79.69
Vested (in dollars per share)		74.43
Nonvested, ending balance (in dollars per share)		$ 76.69	$ 74.43