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Stock Compensation Plans (Restricted Stock, RSUs and Performance Shares Activity Rollforward) (Details) - Restricted Stock, Performance Shares, and Restricted Stock Units (RSUs) [Member] - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Restricted Stock, RSUs and Performance Shares Activity [Roll Forward]
Outstanding, beginning of year	3,074	3,271	2,974
Granted	932	833	1,251
Vested	(1,181)	(786)	(775)
Forfeited	(144)	(244)	(179)
Outstanding, end of year	2,681	3,074	3,271
Vested, end of year	153	129	152
Outstanding, beginning of year, weighted-average per share grant date fair value	$ 23	$ 19	$ 19
Granted, weighted-average per share grant date fair value	27	31	21
Vested, weighted-average per share grant date fair value	17	22	19
Forfeited, weighted-average per share grant date fair value	26	22	19
Outstanding, end of year, weighted-average per share grant date fair value	26	23	19
Vested, end of year, weighted-average per share grant date fair value	$ 20	$ 21	$ 17

X

- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options [Roll Forward]

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Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested, Number

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Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested, Weighted Average Grant Date Fair Value

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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.

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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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- 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).

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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.

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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.

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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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- 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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