| **Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Millions** | Total   | Common Stock | Additional Paid-in Capital | Retained Earnings | Retained Earnings Previously Reported | Retained Earnings Revision of Prior Period, Accounting Standards Update, Adjustment | Accumulated Other Comprehensive Loss | Accumulated Other Comprehensive Loss Previously Reported | Accumulated Other Comprehensive Loss Revision of Prior Period, Accounting Standards Update, Adjustment | Treasury Stock |
|---------------------------------------------------------------------------------------------------|---------|--------------|----------------------------|-------------------|---------------------------------------|-------------------------------------------------------------------------------------|--------------------------------------|----------------------------------------------------------|--------------------------------------------------------------------------------------------------------|----------------|
| Total stockholder's equity at beginning of period at Dec. 31, 2022                                |    | $ 683        | $ 2,220                    | $ 9,336           | $ 9,572                               | $ (236)                                                                             | $ (3,598)                            | $ (3,557)                                                | $ (41)                                                                                                 | $ (93)         |
| **Increase (Decrease) in Stockholders' Equity [Roll Forward]**                                    |    |         |                       |              |                                  |                                                                                |                                 |                                                     |                                                                                                   |           |
| Stock-based compensation                                                                          |    |         | (24)                       |              |                                  |                                                                                |                                 |                                                     |                                                                                                   | 22             |
| Dividends to common stockholders ($2.44 and $1.62 per share)                                      |    |         |                       | (442)             |                                  |                                                                                |                                 |                                                     |                                                                                                   |           |
| Net income                                                                                        | $ 297   |         |                       | 297               |                                  |                                                                                |                                 |                                                     |                                                                                                   |           |
| Other comprehensive income                                                                        | 290     |         |                       |              |                                  |                                                                                | 290                                  |                                                     |                                                                                                   |           |
| Purchase of treasury stock                                                                        | (24)    |         |                       |              |                                  |                                                                                |                                 |                                                     |                                                                                                   | (24)           |
| Total stockholder's equity at end of period at Mar. 31, 2023                                      | 8,667   | 683          | 2,196                      | 9,191             |                                  |                                                                                | (3,308)                              |                                                     |                                                                                                   | (95)           |
| Total stockholder's equity at beginning of period at Dec. 31, 2023                                | 9,893   | 683          | 2,221                      | 9,755             | $ 9,755                               | $ 0                                                                                 | (2,672)                              | $ (2,672)                                                | $ 0                                                                                                    | (94)           |
| **Increase (Decrease) in Stockholders' Equity [Roll Forward]**                                    |    |         |                       |              |                                  |                                                                                |                                 |                                                     |                                                                                                   |           |
| Stock-based compensation                                                                          |    |         | (20)                       |              |                                  |                                                                                |                                 |                                                     |                                                                                                   | 19             |
| Dividends to common stockholders ($2.44 and $1.62 per share)                                      |    |         |                       | (668)             |                                  |                                                                                |                                 |                                                     |                                                                                                   |           |
| Net income                                                                                        | 338     |         |                       | 338               |                                  |                                                                                |                                 |                                                     |                                                                                                   |           |
| Other comprehensive income                                                                        | 100     |         |                       |              |                                  |                                                                                | 100                                  |                                                     |                                                                                                   |           |
| Purchase of treasury stock                                                                        |    |         |                       |              |                                  |                                                                                |                                 |                                                     |                                                                                                   | 0              |
| Total stockholder's equity at end of period at Mar. 31, 2024                                      | $ 9,662 | $ 683        | $ 2,201                    | $ 9,425           |                                  |                                                                                | $ (2,572)                            |                                                     |                                                                                                   | $ (75)         |

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| - Definition
Amount of increase to additional paid-in capital (APIC) for recognition of cost for award under share-based payment arrangement.
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| - Definition
Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.
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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.
+ References
No definition available.
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| - Definition
The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.
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| - Definition
Amount after tax and reclassification adjustments of other comprehensive income (loss).
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Amount of equity (deficit) attributable to parent. Excludes temporary equity and equity attributable to noncontrolling interest.
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.
+ References
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