Equity (Stock-Based Compensation) (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
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| Stock-based compensation | |||
| Stock based compensation costs | $ 107 | $ 100 | $ 82 |
| Tax benefits related to stock-based compensation arrangements | 21 | $ 17 | $ 21 |
| Unrecognized stock based compensation costs | $ 109 | ||
| Unrecognized stock based compensation costs weighted-average period of recognition (in years) | 1 year 8 months 12 days | ||
| Common stock authorized for awards (in shares) | 60,000,000 | ||
| Share-based Payment Arrangement [Member] | |||
| Stock-based compensation | |||
| Number of additional shares available for grant (in shares) | 0 | ||
| X | ||||||||||
- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. 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. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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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. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of tax benefit for recognition of expense of award under share-based payment arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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- Definition Number of additional shares authorized for issuance under share-based payment arrangement. No definition available.
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- Definition Number of shares authorized for issuance under share-based payment arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Details
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