Employee Share-Based Incentives - Employee Share-Based Awards (Details) shares in Millions	12 Months Ended
Dec. 31, 2020 shares
Long-Term Incentive Plan
Employee stock-based awards general disclosures
Shares of common stock available for issuance (in shares)	67
PSUs
Employee stock-based awards general disclosures
Award vesting period	3 years
Holding period	2 years
PSUs \| Minimum
Employee stock-based awards general disclosures
Award vesting percentage	0.00%
Combined vesting and holding period	5 years
PSUs \| Maximum
Employee stock-based awards general disclosures
Award vesting percentage	150.00%
Combined vesting and holding period	8 years
Stock Appreciation Rights (SARs)
Employee stock-based awards general disclosures
Award expiration period	10 years
1st 50% \| RSUs
Employee stock-based awards general disclosures
Award vesting percentage	50.00%
Award vesting period	2 years
2nd 50% \| RSUs
Employee stock-based awards general disclosures
Award vesting percentage	50.00%
Award vesting period	3 years

Share-based Compensation Arrangement by Share-based Payment Award, Award Holding Period

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting and Holding Period

+ References

No definition available.

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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.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
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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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Percentage of vesting of award under share-based payment arrangement.

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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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