| **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                                                                          |     |         | (7)                        |              |                                  |                                                                                |                                 |                                                     |                                                                                                   | 22             |
| Dividends to common stockholders ($0.44, $0.42, $3.32 and $2.46 per share)                        |     |         |                       | (671)             |                                  |                                                                                |                                 |                                                     |                                                                                                   |           |
| Net income                                                                                        | $ 838    |         |                       | 838               |                                  |                                                                                |                                 |                                                     |                                                                                                   |           |
| Other comprehensive income (loss)                                                                 | (143)    |         |                       |              |                                  |                                                                                | (143)                                |                                                     |                                                                                                   |           |
| Purchase of treasury stock                                                                        | (24)     |         |                       |              |                                  |                                                                                |                                 |                                                     |                                                                                                   | (24)           |
| Total stockholder's equity at end of period at Sep. 30, 2023                                      | 8,563    | 683          | 2,213                      | 9,503             |                                  |                                                                                | (3,741)                              |                                                     |                                                                                                   | (95)           |
| Total stockholder's equity at beginning of period at Jun. 30, 2023                                |     | 683          | 2,204                      | 9,359             | 9,359                                 |                                                                                | (3,425)                              | (3,425)                                                  | 0                                                                                                      | (95)           |
| **Increase (Decrease) in Stockholders' Equity [Roll Forward]**                                    |     |         |                       |              |                                  |                                                                                |                                 |                                                     |                                                                                                   |           |
| Stock-based compensation                                                                          |     |         | 9                          |              |                                  |                                                                                |                                 |                                                     |                                                                                                   | 0              |
| Dividends to common stockholders ($0.44, $0.42, $3.32 and $2.46 per share)                        |     |         |                       | (114)             |                                  |                                                                                |                                 |                                                     |                                                                                                   |           |
| Net income                                                                                        | 258      |         |                       | 258               |                                  |                                                                                |                                 |                                                     |                                                                                                   |           |
| Other comprehensive income (loss)                                                                 | (316)    |         |                       |              |                                  |                                                                                | (316)                                |                                                     |                                                                                                   |           |
| Purchase of treasury stock                                                                        |     |         |                       |              |                                  |                                                                                |                                 |                                                     |                                                                                                   | 0              |
| Total stockholder's equity at end of period at Sep. 30, 2023                                      | 8,563    | 683          | 2,213                      | 9,503             |                                  |                                                                                | (3,741)                              |                                                     |                                                                                                   | (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                                                                          |     |         | 0                          |              |                                  |                                                                                |                                 |                                                     |                                                                                                   | 20             |
| Dividends to common stockholders ($0.44, $0.42, $3.32 and $2.46 per share)                        |     |         |                       | (908)             |                                  |                                                                                |                                 |                                                     |                                                                                                   |           |
| Net income                                                                                        | 938      |         |                       | 938               |                                  |                                                                                |                                 |                                                     |                                                                                                   |           |
| Other comprehensive income (loss)                                                                 | 835      |         |                       |              |                                  |                                                                                | 835                                  |                                                     |                                                                                                   |           |
| Purchase of treasury stock                                                                        | (20)     |         |                       |              |                                  |                                                                                |                                 |                                                     |                                                                                                   | (20)           |
| Total stockholder's equity at end of period at Sep. 30, 2024                                      | 10,758   | 683          | 2,221                      | 9,785             |                                  |                                                                                | (1,837)                              |                                                     |                                                                                                   | (94)           |
| Total stockholder's equity at beginning of period at Jun. 30, 2024                                |     | 683          | 2,210                      | 9,623             | $ 9,623                               | $ 0                                                                                 | (2,547)                              | $ (2,547)                                                | $ 0                                                                                                    | (95)           |
| **Increase (Decrease) in Stockholders' Equity [Roll Forward]**                                    |     |         |                       |              |                                  |                                                                                |                                 |                                                     |                                                                                                   |           |
| Stock-based compensation                                                                          |     |         | 11                         |              |                                  |                                                                                |                                 |                                                     |                                                                                                   | 1              |
| Dividends to common stockholders ($0.44, $0.42, $3.32 and $2.46 per share)                        |     |         |                       | (121)             |                                  |                                                                                |                                 |                                                     |                                                                                                   |           |
| Net income                                                                                        | 283      |         |                       | 283               |                                  |                                                                                |                                 |                                                     |                                                                                                   |           |
| Other comprehensive income (loss)                                                                 | 710      |         |                       |              |                                  |                                                                                | 710                                  |                                                     |                                                                                                   |           |
| Purchase of treasury stock                                                                        |     |         |                       |              |                                  |                                                                                |                                 |                                                     |                                                                                                   | 0              |
| Total stockholder's equity at end of period at Sep. 30, 2024                                      | $ 10,758 | $ 683        | $ 2,221                    | $ 9,785           |                                  |                                                                                | $ (1,837)                            |                                                     |                                                                                                   | $ (94)         |

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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.
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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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| - Definition
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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