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Equity - Other share-based awards under the SIP (Details) - USD ($) shares in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Other share-based awards under the SIP |  |  |
Total share-based compensation expense included in net income | $ 18,000,000 | $ 21,000,000 | $ 26,000,000
Compensation Arrangement |  |  |
Other share-based awards under the SIP |  |  |
Amount of Directors' retainer paid in stock | $ 120,000 |  |
Percentage of additional Directors' retainer paid in stock | 50.00% |  |
Restricted stock units (RSUs) |  |  |
Other share-based awards under the SIP |  |  |
Minimum period over which deferred shares may be transferred after director's termination of service | 6 months |  |
Total share-based compensation expense included in net income | $ 10,000,000 | 12,000,000 | 13,000,000
Restricted stock units (RSUs) | Compensation Arrangement |  |  |
Other share-based awards under the SIP |  |  |
Total share-based compensation expense included in net income | $ 1,000,000 | $ 1,000,000 | $ 1,000,000
Awards outstanding (in shares) | 210 |  |
Carrying value of share units outstanding | $ 13,000,000 |  |

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- Definition Minimum period over which deferred shares may be transferred after grantee's termination of service. + References No definition available. + Details
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- Definition The amount of the non-employee director's retainer that is paid in shares of common stock or restricted stock. + References No definition available. + Details
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