Share Based Compensation, Stock Options Award Exercise Price Premium Percentage

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Look-Back Period

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Period of U.S. Treasury Yield

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Minimum Employee Subscription Rate

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- Definition

Stock Issued During Period, Price Per Share, Employee Stock Purchase Plans

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- Definition

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

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- Definition

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

Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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- Definition

Discount rate from fair value on purchase date that participants pay for shares.

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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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- 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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- Definition

The highest percentage of annual salary that an employee is permitted to utilize with respect to the plan.

+ References

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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- Definition

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

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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.

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- Definition

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

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- Definition

Number of shares issued during the period as a result of an employee stock purchase plan.

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Stock Compensation Plans - Narrative (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Option, Exercise Price Range, Exercisable, Weighted Average Exercise Price	$ 36.26		$ 36.26
Weighted average grant date fair value of stock options (in dollars per share)			$ 7.64	$ 8.07
Contractual term of stock options granted			7 years	7 years
Share-based Payment Arrangement, Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage			50.00%
Share-based Payment Arrangement, Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage			50.00%
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Discount stock purchase price percentage			15.00%
Look-back feature period of discount stock purchase price			3 months
Minimum contribution by participant percentage	1.00%		1.00%
Maximum contribution by participant percentage	10.00%		10.00%
Stocks purchased by employees during the period (in shares)	0.3	0.2
Discounted price per share of stocks purchased by employees (in dollar per share)	$ 14.43	$ 26.44
Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period			36 months	4 years
Vesting period of awards granted			36 months	4 years
Risk-free interest rate period of U.S. Treasury yield			7 years
Unrecognized compensation cost related to unvested awards	$ 54		$ 54
Weighted average period to recognized compensation cost related to unvested awards			1 year 1 month 6 days
Stock Option \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate period of U.S. Treasury yield				3 years
Stock Option \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate period of U.S. Treasury yield				5 years
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to unvested awards	$ 116		$ 116
Weighted average period to recognized compensation cost related to unvested awards			10 months 24 days
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$ 21.74		$ 21.74
Restricted Stock Units \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate period of U.S. Treasury yield				1 year
Restricted Stock Units \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate period of U.S. Treasury yield				2 years
Award type 1 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Based Compensation, Stock Options Award Exercise Price Premium Percentage			110.00%
Award type 2 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Based Compensation, Stock Options Award Exercise Price Premium Percentage			115.00%