Share based compensation arrangement by share based payment award number of shares first authorized.

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- Definition

Share based compensation arrangement by share based payment award number of shares previously authorized.

+ References

No definition available.

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- Definition

Represents the compensation cost capitalized during the period arising from equity-based compensation arrangements (for example, shares of stock, units, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ 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 (h)(1)(ii)
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- Definition

Disclosure of the aggregate tax benefit realized from the exercise of stock options and the conversion of similar instruments during the annual period.

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-Publisher FASB
-Name Accounting Standards Codification
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-Paragraph 2
-Subparagraph (j)
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- Definition

The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
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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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- 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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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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.

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- Definition

Number of additional shares authorized for issuance under an established share-based compensation plan.

+ References

No definition available.

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- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
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-Paragraph 2
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- Definition

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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-Publisher FASB
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-Topic 718
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- Definition

Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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-Publisher FASB
-Name Accounting Standards Codification
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-Subparagraph (d)(2)
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- Definition

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

+ References

No definition available.

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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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-Publisher FASB
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- Definition

Price of a single share of a number of saleable stocks of a company.

+ References

No definition available.

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- Definition

Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

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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-Publisher FASB
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- Definition

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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Stock Based Awards and Other Equity Instruments - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions			12 Months Ended
	Sep. 12, 2014	Jun. 28, 2013	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 20, 2011
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Capitalized stock based compensation as internal-use software and website development costs			$ 12	$ 8	$ 8
Common shares registered for issuance under incentive plan						17,500,000
Common stock share issuance under plan		15,000,000
Cash received from stock option exercises			$ 7	12	3
Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of stock options issued			1,064,000
Term of stock options, granted			10 years
Stock awards vest period			4 years
RSU
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock awards vest period			4 years
RSU's issued under incentive plan			2,016,000
2011 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common shares registered for issuance under incentive plan						17,400,000
Common shares previously registered for issuance under incentive plan						7,400,000
Share registered under amendment						10,000,000
Common stock share issuance under plan			15,051,221
2011 Plan \| Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of stock options issued			1,063,672
Term of stock options, granted			10 years
Stock awards vest period			4 years
Closing stock price			$ 46.37
Total intrinsic value			$ 24	$ 149	$ 75
Weighted-average grant date fair value of options granted			$ 22.95	$ 33.02	$ 46.65
Total fair value of stock options vested			$ 28	$ 36	$ 34
Cash received from stock option exercises			7	12	3
Income tax benefits from exercise or settlement of stock-based awards			$ 21	$ 63	$ 32
2011 Plan \| RSU
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock awards vest period			4 years
RSU's issued under incentive plan			2,015,898
Deferred Compensation Plan for Non Employee Directors
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common shares registered for issuance under incentive plan						100,000
2010 Stock Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Issuance of common stock	100,595
2011 Plan \| Acquisition Related Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted-average grant date fair value of options granted					$ 80.31