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Share-Based Associate Compensation Plans (Narrative) (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2023 USD ($) peers_exceeded Peers compensation_plans shares | Dec. 31, 2022 USD ($) Peers peers_exceeded shares | Dec. 31, 2021 USD ($) peers_exceeded Peers shares
Share-based Compensation Arrangement by Share-based Payment Award |  |  |
Number of equity compensation plans | compensation_plans | 3 |  |
Maximum number of shares awarded to each full-time employee for their service | shares | 10 |  |
Share based compensation cost after tax | $ 32 | $ 29 | $ 26
Tax benefit from compensation expense | 8 | 7 | 6
Options exercised, intrinsic value | 14 | 21 | 24
Options vested, intrinsic value | 0 | 2 | 15
Unrecognized compensation costs related to non-vested awards | $ 43 |  |
Expected weighted-average period to recognize the unrecognized compensation costs related to non-vested awards | 1 year 9 months 18 days |  |
Proceeds from stock options exercised | $ 9 | 10 | 13
Shares of common stock granted in period (in shares) | shares | 384,000 |  |
Stock Options |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |
Awards exercise peirod | 10 years |  |
Awards vesting period | 3 years |  |
Proceeds from stock options exercised | $ 9 | $ 10 | $ 13
Shares repurchased | shares | 72,549 | 80,538 | 77,947
Shares repurchased, value | $ 8 | $ 10 | $ 8
Weighted average remaining contractual term | 8 years 5 months 12 days |  |
Shares authorized to be granted under the shareholder-approved plans | shares | 10,300,000 |  |
Shares available for future issuance under the plans | shares | 3,600,000 |  |
Stock Options | Directors |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |
Shares of common stock granted in period (in shares) | shares | 11,524 |  |
Performance Shares | Restricted Stock Units (RSUs) |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |
Number of peers exceeded | peers_exceeded | 2 | 1 | 6
Number of peers in peer group | Peers | 8 | 8 | 9
Shares, Issued | shares | 0 | 52,335 |
Awards vesting period | 3 years | 3 years |
Risk-free rates, minimum | 0.00% | 0.00% | 0.00%
Risk-free rates, maximum | 200.00% | 200.00% | 200.00%
share based performance metric for performance shares | 3 years |  |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Intrinsic Value Aggregate |  | $ 6 | $ 11
Service Based Shares | Restricted Stock Units (RSUs) |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |
Awards vesting period | 3 years |  |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Intrinsic Value Aggregate | $ 22 | $ 32 | $ 26

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