Share-Based Payments - Stock Option Activity (Details) - Share-based Payment Arrangement, Option shares in Thousands	12 Months Ended
Dec. 31, 2020 $ / shares shares
Shares
Beginning balance, outstanding shares (in shares) \| shares	12
Granted (in shares) \| shares	0
Exercised (in shares) \| shares	(12)
Cancelled (in shares) \| shares	0
Ending balance, outstanding shares (in shares) \| shares	0
Weighted Average Exercise Price
Beginning balance, weighted average exercise price (in dollars per share) \| $ / shares	$ 58.46
Granted (in dollars per share) \| $ / shares	0
Exercised (in dollars per share) \| $ / shares	58.46
Cancelled (in dollars per share) \| $ / shares	0
Ending balance, weighted average exercise price (in dollars per share) \| $ / shares	$ 0

The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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- Definition

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

+ References

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- Definition

Number of options outstanding, including both vested and non-vested options.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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- Definition

Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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- Definition

Weighted average price at which option holders acquired shares when converting their stock options into shares.

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- Definition

Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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- Definition

Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

+ References

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- Definition

Number of share options (or share units) exercised during the current period.

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-Name Accounting Standards Codification
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-Paragraph 2
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