Current Estimated Percentage Of Share Units Awarded Ultimately Issued

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- Definition

Number of Share-based Compensation Plans

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Percentage Of Share Units Awarded Ultimately Issued

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Percentage Payout

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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.

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- Definition

Value of equity interests (such as common shares, preferred shares, or partnership interest) issued or issuable to acquire the entity.

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- Definition

Unrecognized cost of unvested share-based compensation awards.

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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.

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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.

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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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- Definition

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

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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.

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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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- 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.

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Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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- Definition

Per share or per unit amount of equity securities issued.

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No definition available.

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Number of shares of stock issued during the period pursuant to acquisitions.

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Number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of any shares forfeited. Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

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Value of stock (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of stock value of such awards forfeited. Stock issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

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Stock-Based Compensation (Narrative) (Details) $ / shares in Units, $ in Millions		3 Months Ended	11 Months Ended	12 Months Ended
	Feb. 01, 2017 USD ($) $ / shares shares	Dec. 31, 2017 USD ($) $ / shares	Dec. 31, 2017 USD ($) $ / shares	Dec. 31, 2017 USD ($) plan $ / shares shares	Dec. 31, 2016 USD ($) $ / shares	Dec. 31, 2015 USD ($) $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Issued During Period, Shares, Acquisitions \| shares	472,276
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	$ 13.3
Number of share-based compensation plans \| plan				2
Compensation cost attributable to share-based compensation plans			$ 6.7	$ 39.8	$ 22.8	$ 26.9
Stock Issued	$ 6.6
Shares Issued, Price Per Share \| $ / shares	$ 28.12				$ 30.18
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting (transfer/conversion to common stock) \| shares				817,601
Grant date fair value of restricted stock vested				$ 24.9	$ 18.4	$ 14.2
Total unrecognized compensation cost related to non-vested grants		$ 33.9	$ 33.9	$ 33.9
Weighted Average Grant Date Fair Value, Non-vested shares \| $ / shares		$ 33.51	$ 33.51	$ 33.51	$ 28.87
Weighted average grant date fair value \| $ / shares				$ 30.41
Total unrecognized compensation cost, weighted-average period of recognition, years				1 year 7 months
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant date fair value \| $ / shares					$ 21.66	$ 49.92
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting (transfer/conversion to common stock) \| shares				151,599
Grant date fair value of restricted stock vested					$ 7.4	$ 10.4
Total unrecognized compensation cost related to non-vested grants		$ 15.6	$ 15.6	$ 15.6
Weighted Average Grant Date Fair Value, Non-vested shares \| $ / shares		$ 33.94	$ 33.94	$ 33.94
Total unrecognized compensation cost, weighted-average period of recognition, years				2 years 1 month
Percentage of share units awarded that will ultimately be issued, current estimate				110.00%
Common stock issued, shares \| shares				138,374
Performance share units, vested in period, percentage payout				91.00%
Common stock issued, fair value				$ 6.6
Minimum [Member] \| Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of share units awarded that will ultimately be issued, possible range				0.00%
Maximum [Member] \| Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock vesting period, years				3 years
Maximum [Member] \| Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock vesting period, years		3 years
Percentage of share units awarded that will ultimately be issued, possible range				200.00%
HEP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost attributable to share-based compensation plans				$ 2.5	$ 2.7	$ 3.5