No definition available.

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees, due to retirement eligibility preceding the requisite vesting period.

+ References

No definition available.

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- Definition

Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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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.

+ Details

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- Definition

The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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- Definition

The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(iii)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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- Definition

The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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- Definition

The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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- Definition

Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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- Definition

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

+ References

+ Details

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- Definition

Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iii)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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- Definition

The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (e)(1)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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SHARE-BASED COMPENSATION PLANS AND AWARDS Part 2 (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Share-based compensation expense, retirement eligibility preceding the requisite vesting period	$ 2	$ 2	$ 2
Remaining contractual term and weighted average exercise prices of stock options [Abstract]
Number Outstanding at end of period (in shares)	2,614,100
Weighted-Average Remaining Contractual Life (in years)	7 years 19 days
Weighted-Average Exercise Price (in dollars per share)	$ 70
Number Exercisable at end of period (in shares)	1,335,500
Weighted-Average Exercise Price (in dollars per share)	$ 65
Exercise price of options lower range (in dollars per share)	18
Exercise prices of options upper range (in dollars per share)	$ 87
Prices of $18-$35 [Member]
Remaining contractual term and weighted average exercise prices of stock options [Abstract]
Number Outstanding at end of period (in shares)	62,500
Weighted-Average Remaining Contractual Life (in years)	1 year 7 months 26 days
Weighted-Average Exercise Price (in dollars per share)	$ 27
Number Exercisable at end of period (in shares)	62,500
Weighted-Average Exercise Price (in dollars per share)	$ 27
Exercise price of options lower range (in dollars per share)	18
Exercise prices of options upper range (in dollars per share)	$ 35
Prices of $36-$50 [Member]
Remaining contractual term and weighted average exercise prices of stock options [Abstract]
Number Outstanding at end of period (in shares)	271,500
Weighted-Average Remaining Contractual Life (in years)	3 years 1 month 25 days
Weighted-Average Exercise Price (in dollars per share)	$ 39
Number Exercisable at end of period (in shares)	271,500
Weighted-Average Exercise Price (in dollars per share)	$ 39
Exercise price of options lower range (in dollars per share)	36
Exercise prices of options upper range (in dollars per share)	$ 50
Prices of $51-$73 [Member]
Remaining contractual term and weighted average exercise prices of stock options [Abstract]
Number Outstanding at end of period (in shares)	823,300
Weighted-Average Remaining Contractual Life (in years)	7 years 19 days
Weighted-Average Exercise Price (in dollars per share)	$ 67
Number Exercisable at end of period (in shares)	454,000
Weighted-Average Exercise Price (in dollars per share)	$ 68
Exercise price of options lower range (in dollars per share)	51
Exercise prices of options upper range (in dollars per share)	$ 73
Prices of $74-$87 [Member]
Remaining contractual term and weighted average exercise prices of stock options [Abstract]
Number Outstanding at end of period (in shares)	1,456,800
Weighted-Average Remaining Contractual Life (in years)	8 years
Weighted-Average Exercise Price (in dollars per share)	$ 79
Number Exercisable at end of period (in shares)	547,500
Weighted-Average Exercise Price (in dollars per share)	$ 80
Exercise price of options lower range (in dollars per share)	74
Exercise prices of options upper range (in dollars per share)	$ 87
Stock Option [Member]
Remaining contractual term and weighted average exercise prices of stock options [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value	$ 59
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	$ 37
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term	5 years 6 months 30 days