The total number of shares issued pursuant to the Company's employee stock purchase plan.

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The maximum ownership percentage an employee may hold of the Company's stock before becoming ineligible to in the Company's employee stock purchase plan.

+ References

No definition available.

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Percentage of an employees base pay used to determine the amount of payroll deductions authorized by the employee under employee stock purchase plans which allows employees to purchase shares of common stock from the Company

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No definition available.

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Payment period of employee stock purchase plans, in PnM format.

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No definition available.

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Purchase price of common stock expressed as a percentage of its fair value on the lower of the first or last day of the payment period

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No definition available.

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- Definition

Maximum Percentage of Market and Service Condition Stock Units That will Ultimately Vest

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No definition available.

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Maximum Percentage of Market and Service Condition Stock Units That will Ultimately Vest with Change of Control

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Interim period in which performance shares are measured, in PnM format.

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No definition available.

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The number of shares per non-vested stock unit received upon vesting.

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No definition available.

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Performance period over which senior-level employees are required to provide services in exchange for equity instruments other than options

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No definition available.

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The period in which the actual stock units earned for the interim measurement date are determined, in PnD format.

+ References

No definition available.

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- Definition

The maximum percentage of the target award which may be earned based on the performance to date noted during the interim measurement period.

+ References

No definition available.

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- Definition

The maximum percentage of stock units earned based on the maximum annualized target shareholder return being achieved.

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No definition available.

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The maximum percentage of stock units earned based on the minimum annualized target shareholder return being achieved.

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No definition available.

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- Definition

The maximum percentile of companies within a pre-established custom index group used to compare the total return to stockholders in order to determine the share-based payment award.

+ References

No definition available.

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The minimum percentile of companies within a pre-established custom index group used to compare the total return to stockholders in order to determine the share-based payment award.

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No definition available.

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- Definition

The minimum percentile within a pre-established custom index group that must be achieved in order to earn the maximum number of non-vested stock units.

+ References

No definition available.

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Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized, Fungible Share Factor

+ References

No definition available.

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- Definition

Number of stock-based compensation plans offered

+ References

No definition available.

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- Definition

The number of monthly installments in which stock-based compensation awards vest.

+ References

No definition available.

+ Details

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Aggregate number of common shares reserved for future issuance.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

+ References

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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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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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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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

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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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No definition available.

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- Definition

The highest quantity of shares an employee can purchase under the plan per period.

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

Number of shares authorized for issuance under share-based payment arrangement.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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- Definition

Percentage of vesting of award under share-based payment arrangement.

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Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Stock-Based Compensation (Narrative) (Details)			1 Months Ended				3 Months Ended			6 Months Ended
Stock-Based Compensation (Narrative) (Details)	Apr. 22, 2019 USD ($)	Aug. 01, 2017 shares	Apr. 30, 2019 shares	Feb. 28, 2019 shares	Mar. 31, 2018 shares	Mar. 31, 2017 $ / shares shares	Jun. 30, 2019 USD ($) plan shares	Mar. 31, 2019	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($) installment plan shares	Jun. 30, 2018 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock-based compensation plans offered \| plan							1			1
Stock-based compensation cost \| $							$ 68,320,000		$ 55,844,000	$ 133,554,000	$ 91,567,000
Market Performance and Service Condition Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-vested stock unit awards granted to senior level employees (shares)						275,148
Minimum return to shareholders as percentile of peer group to reach target share cap, minimum						80.00%
Total return to shareholders as percentile of peer group, minimum						41.00%
Total return to shareholders as percentile of peer group, maximum						80.00%
Performance share earned share cap based on maximum shareholder return (percent)						100.00%
Performance share earned share cap based on minimum shareholder return (percent)						200.00%
Performance Share Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period for grants						3 years
Performance share earned share cap based on minimum shareholder return (percent)			200.00%		200.00%
Performance share period to determine actual stock grant following end of interim measurement period		60 days	60 days	60 days	60 days	60 days
Performance share interim measurement period				12 months
Maximum percent of target award that can be earned based on interim performance period (percent)				50.00%
Maximum Percentage of Market and Service Condition Stock Units That will Ultimately Vest		200.00%
Non-vested Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life (in years)						2 years 9 months
The estimated fair value of each award (in dollars per share) \| $ / shares						$ 104.05
Share based awards granted and outstanding (shares)							6,387,078			6,387,078
Total unrecognized compensation cost related to stock-based compensation \| $							$ 479,800,000			$ 479,800,000
Total unrecognized compensation cost recognition period										1 year 11 months 15 days
Non-vested Stock Unit Awards, Modified Grant [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life (in years)						1 year 21 days
The estimated fair value of each award (in dollars per share) \| $ / shares						$ 99.54
Market Performance Stock Units and Company Performance Stock Units, Change in Control Modification [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation cost \| $	$ 0
Maximum percentage of market and service condition stock units that will ultimately vest with change of control (percent)	200.00%
2014 Plan [Member] \| Non-vested Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares per non-vested stock unit										1
Stock-based compensation award vesting period, number of monthly installments \| installment										12
2014 Plan [Member] \| Annual vesting on each anniversary [Member] \| Non-vested Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting percentage										33.33%
2015 ESPP Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized for issuance under the Plan (shares)							16,000,000			16,000,000
Employee Stock Purchase Plan, payment period										6 months
Employee Stock Purchase Plan, maximum number of shares per period that employees can purchase										12,000
Employee Stock Purchase Plan, purchase price as a percentage of fair market value										85.00%
Employee Stock Purchase Plan, employee disqualification, ownership percent of outstanding stock										5.00%
Employee Stock Purchase Plan, total shares issued under plan (shares)							1,937,455			1,937,455
Expected life (in years)										6 months	6 months
2015 ESPP Plan [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Stock Purchase Plan, option to purchase shares through payroll deduction, payroll deduction amount per pay period per employee, as a percentage of base pay										1.00%
2015 ESPP Plan [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Stock Purchase Plan, option to purchase shares through payroll deduction, payroll deduction amount per pay period per employee, as a percentage of base pay										10.00%
ESPPs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation cost \| $							$ 2,600,000		$ 2,500,000	$ 5,500,000
Common Stock [Member] \| 2014 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized for issuance under the Plan (shares)							43,400,000			43,400,000
Fungible share factor under original terms of the Plan								2.75
Shares reserved for issuance under the stock-based compensation plans (shares)							12,232,522			12,232,522
Shares available for grant under the 2014 Plan (shares)							5,797,048			5,797,048
Senior Level Employees [Member] \| Performance Share Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-vested stock unit awards granted to senior level employees (shares)		184,322	293,991	93,500	268,729