Business Combination, Common Stock Conversion, Aggregate Cash Conversion

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- Definition

Business Combination, Common Stock Conversion, Cash Conversion

+ References

No definition available.

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- Definition

Sale of Stock, Stock Dividend, Per Share

+ References

No definition available.

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- Definition

This element represents the percentage of the stock-based award which will vest at the end of year one.

+ References

No definition available.

+ Details

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- Definition

This element represents the percentage of the stock-based award which will vest at the end of year two.

+ References

No definition available.

+ Details

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- Definition

The weighted average fair value at grant date for equity-based awards issued and vested 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

No definition available.

+ Details

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- Definition

Represents the payout percentage based upon the performance during the performance period.

+ References

No definition available.

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- Definition

The stated exercise price for purposes of disclosing shares potentially issuable under outstanding stock option awards on stock option plans.

+ References

No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Expected to be Distributed in Common Stock

+ References

No definition available.

+ Details

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Expected to be Paid in Cash

+ References

No definition available.

+ Details

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk-free Rate Term

+ References

No definition available.

+ Details

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- Definition

Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements. Represents currently earned compensation under compensation arrangements that is not actually paid until a later date.

+ References

No definition available.

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- Definition

Unrecognized cost of unvested share-based compensation awards.

+ References

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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Amount of tax benefit from exercise of stock options granted under share-based compensation arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2A
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=SL79508275-113901

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- Definition

Amount of cash inflow from issuance of shares under share-based compensation arrangement, excluding stock option exercises.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
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- Definition

Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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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

+ Details

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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

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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

+ Details

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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.

+ References

+ Details

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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

Net number of non-option equity instruments granted to participants.

+ References

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- Definition

Number of equity instruments other than options outstanding, including both vested and non-vested instruments.

+ References

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

Net number of share options (or share units) granted during the period.

+ References

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- Definition

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

+ References

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Share-Based Compensation Plans - Narrative (Details)				12 Months Ended
Share-Based Compensation Plans - Narrative (Details)	Jan. 01, 2019 $ / shares shares	Nov. 12, 2018	Nov. 13, 2017 USD ($) $ / shares shares	Dec. 31, 2018 USD ($) $ / shares shares	Dec. 31, 2017 USD ($) $ / shares shares	Dec. 31, 2016 USD ($) $ / shares shares	Jan. 01, 2018 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock dividend (in dollars per share)		0.80
Cash received from exercises of all share-based payment arrangements for employees and directors \| $				$ 1,900,000	$ 200,000	$ 5,000,000
Income tax benefit by the exercise of nonqualified employee stock options and vesting of restricted share awards \| $				$ 13,400,000	58,900,000	22,200,000
Rice Merger Agreement
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate cash conversion \| $			$ 13,000,000
Cash conversion (in dollars per share) \| $ / shares			$ 5.30
Value Driver Performance Programs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award requisite service period				1 year
Award vested at end of year one				50.00%
Award vested at end of year two				50.00%
2018 EQT Value Driver Performance Share Unit Award Program \| Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vested at end of year one	50.00%
Award vested at end of year two	50.00%
Number of shares granted (in shares)	614,680
2018 Incentive Performance Share Unit Program \| Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted (in shares)	642,920
Period after which the shares granted will be fully vested	3 years
Expected to be distributed in common stock (in shares)	402,220
Expected to be paid in cash (in shares)	240,700
Minimum \| 2018 EQT Value Driver Performance Share Unit Award Program \| Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation plan, award as a percentage of target award level	0.00%
Minimum \| 2018 Incentive Performance Share Unit Program \| Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation plan, award as a percentage of target award level	0.00%
Maximum \| 2018 EQT Value Driver Performance Share Unit Award Program \| Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation plan, award as a percentage of target award level	300.00%
Maximum \| 2018 Incentive Performance Share Unit Program \| Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation plan, award as a percentage of target award level	300.00%
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award requisite service period				36 months
Performance Shares \| 2016 Executive Performance Incentive Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant date fair value (in dollars per share) \| $ / shares				$ 109.30
Awards outstanding (in shares)				384,101			447,145
Performance Shares \| 2017 Executive Performance Incentive Program, Equity
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs on non-vested awards \| $				$ 600,000
Grant date fair value (in dollars per share) \| $ / shares				$ 120.60
Awards outstanding (in shares)				44,573			79,070
Performance Shares \| 2017 Executive Performance Incentive Program, Liability
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs on non-vested awards \| $				$ 2,000,000
Grant date fair value (in dollars per share) \| $ / shares				$ 59.90
Awards outstanding (in shares)				105,018			117,530
Performance Shares \| 2018 Executive Performance Incentive Program, Equity
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs on non-vested awards \| $				$ 1,100,000
Number of shares granted (in shares)				172,350
Grant date fair value (in dollars per share) \| $ / shares				$ 76.53
Awards outstanding (in shares)				107,340
Performance Shares \| 2018 Executive Performance Incentive Program, Liability
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs on non-vested awards \| $				$ 3,000,000
Number of shares granted (in shares)				142,890
Grant date fair value (in dollars per share) \| $ / shares				$ 33.30
Awards outstanding (in shares)				124,820
Performance Shares \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation plan, award as a percentage of target award level				0.00%
Performance Shares \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation plan, award as a percentage of target award level				300.00%
Performance Share, Equity Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free rate term				3 years
Performance Shares, Liability Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free rate term				1 year
Performance Shares, Liability Awards \| 2018 Executive Performance Incentive Program, Liability
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free rate term				2 years
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs on non-vested awards \| $				$ 2,500,000
Period for recognition				1 year 3 months
Number of shares granted (in shares)				145,540
Grant date fair value (in dollars per share) \| $ / shares				$ 54.33
Value \| $				$ 39,843,286	$ 123,000,000	$ 5,100,000
Awards outstanding (in shares)				192,782	729,500
Restricted Stock \| Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted (in shares)	201,130
Period after which the shares granted will be fully vested	3 years
Restricted Stock \| Rice Merger Agreement
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted (in shares)			2,290,234
Grant date fair value (in dollars per share) \| $ / shares				$ 65.18	$ 65.18
Restricted Stock \| Key Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted (in shares)				145,540	85,350	158,360
Period after which the shares granted will be fully vested				3 years
Grant date fair value (in dollars per share) \| $ / shares				$ 54.33	$ 63.00	$ 75.00
Restricted Stock \| Chief Financial Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted (in shares)					7,900
Period after which the shares granted will be fully vested					1 year
Grant date fair value (in dollars per share) \| $ / shares					$ 63.33
Restricted Stock Units, Liability
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted (in shares)				373,750	292,400	148,860
Period after which the shares granted will be fully vested				3 years
Awards outstanding (in shares)				639,780
Deferred compensation liability \| $				$ 6,900,000	$ 8,800,000	$ 2,700,000
Restricted Stock Units, Liability \| Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted (in shares)	427,900
Non-qualified Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs on non-vested awards \| $				$ 400,000
Granted (in shares)				287,800
Weighted average remaining contractual term, outstanding				5 years 6 months 26 days
Non-qualified Stock Options \| Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period after which the shares granted will be fully vested	3 years
Granted (in shares)	669,200
Exercise price (in dollars per share) \| $ / shares	$ 18.89
Weighted average remaining contractual term, outstanding	10 years
Non-employee Directors' Share-Based Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares outstanding (in shares)				267,906
Shares granted (in shares)				50,979	26,090	37,620
Weighted average fair value, granted (in dollars per share) \| $ / shares				$ 52.65	$ 65.35	$ 52.13