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Stock Plans (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Restricted Stock Units (RSUs) [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period, in years | 3 years |  |
Expense amortization period | 3 years |  |
Pre-tax compensation expense | $ 50 | $ 47 | $ 41
Deferred tax benefit | 12 | 12 | 10
Unamortized compensation expense | $ 86 |  |
Weighted-average period of recognition, in years | 2 years |  |
Weighted-average grant date fair value | $ 67 | $ 56 | $ 59
Weighted-average grant date fair value, per share (in USD per share) | $ 43.29 | $ 46.38 | $ 49.22
Total fair value vested | $ 35 | $ 40 | $ 29
Granted, number of shares (in shares) | 1,546,213 |  |
Number of shares remaining (in shares) | 3,973,485 | 3,472,801 |
Grant date fair value (in USD per share) | $ 45.87 | $ 46.84 |
Performance Shares [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period, in years | 3 years |  |
Pre-tax compensation expense | $ 6 | $ 11 | $ 9
Unamortized compensation expense | $ 13 |  |
Granted, number of shares (in shares) | 290,980 | 255,601 | 215,205
Number of shares remaining (in shares) | 750,826 |  |
Grant date fair value (in USD per share) | $ 46.87 |  |
Common Stock [Member] | 2020 Performance Incentive Plan [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Maximum number of shares issuable under the stock compensation plan (in shares) | 25,000,000 |  |
Shares available to be granted (in shares) | 18,507,747 |  |
Common Stock [Member] | 2015 Directors Plan [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Maximum number of shares issuable under the stock compensation plan (in shares) | 1,000,000 |  |
Shares available to be granted (in shares) | 533,843 |  |

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