Adjustment to the target number of shares / units during the period for meeting or not meeting performance targets.

No definition available.

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- Definition

The weighted average grant date fair value related to adjustment to the target number of shares / units during the period for meeting or not meeting performance targets.

+ References

No definition available.

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- Definition

The multiplier to the target number of performance awards for achieving certain performance targets.

+ References

No definition available.

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- Definition

Variable profit sharing

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No definition available.

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- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(3)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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- Definition

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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
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-Paragraph 2
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- Definition

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).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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- Definition

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

+ References

No definition available.

+ Details

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- Definition

Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
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-Paragraph 2
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- Definition

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

+ References

No definition available.

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- Definition

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

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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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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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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-Paragraph 2
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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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Share-Based Payments (Summary of the Company's Employee Restricted Stock Shares, Restricted Stock Units and Performance Shares (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares to be awarded at the end of each performance period	0.00%
Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares to be awarded at the end of each performance period	125.00%
Employee restricted stock units
Restricted Awards
Restricted (in shares)	4,760,914
Granted (in shares)	1,919,168
Forfeited (in shares)	(183,997)
Released (in shares)	(2,024,896)
Restricted (in shares)	4,471,189	4,760,914
Weighted Average Grant Date Fair Value
Restricted (in dollars per share)	$ 90.09
Granted (in dollars per share)	93.35	$ 106.32	$ 110.39
Forfeited (in dollars per share)	100.09
Released (in dollars per share)	65.44
Restricted (in dollars per share)	$ 102.25	$ 90.09
Employee performance shares and performance units
Restricted Awards
Restricted (in shares)	1,809,075
Granted (in shares)	691,724
Forfeited (in shares)	(12,947)
Performance adjustment (in shares)	92,841
Released (in shares)	(757,807)
Restricted (in shares)	1,822,886	1,809,075
Weighted Average Grant Date Fair Value
Restricted (in dollars per share)	$ 81.55
Granted (in dollars per share)	90.68	$ 81.55	$ 114.98
Forfeited (in dollars per share)	93.26
Performance adjustment (in dollars per share)	93.36
Released (in dollars per share)	93.36
Restricted (in dollars per share)	$ 80.62	$ 81.55
Assurance IQ \| Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares to be awarded at the end of each performance period	0.00%
Variable profit sharing	$ 900
Assurance IQ \| Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares to be awarded at the end of each performance period	100.00%
Variable profit sharing	$ 1,300
Assurance IQ \| Employee restricted stock units
Restricted Awards
Restricted (in shares)	0
Granted (in shares)	125,788
Forfeited (in shares)	0
Performance adjustment (in shares)	0
Released (in shares)	0
Restricted (in shares)	125,788	0
Weighted Average Grant Date Fair Value
Restricted (in dollars per share)	$ 0
Granted (in dollars per share)	87.67
Forfeited (in dollars per share)	0
Performance adjustment (in dollars per share)	0
Released (in dollars per share)	0
Restricted (in dollars per share)	$ 87.67	$ 0
Assurance IQ \| Employee performance shares and performance units
Restricted Awards
Restricted (in shares)	0
Granted (in shares)	1,982,708
Forfeited (in shares)	0
Performance adjustment (in shares)	0
Released (in shares)	0
Restricted (in shares)	1,982,708	0
Weighted Average Grant Date Fair Value
Restricted (in dollars per share)	$ 0.00
Granted (in dollars per share)	89.81
Forfeited (in dollars per share)	0.00
Performance adjustment (in dollars per share)	0.00
Released (in dollars per share)	0.00
Restricted (in dollars per share)	$ 89.81	$ 0.00