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Stock-Based Compensation - Stock Options (Details) - Common Shares - Stock Options - Long-Term Incentive Plans - USD ($) $ / shares in Units, shares in Thousands, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Stock compensation, number of options |  |  |
Stock options outstanding | 348 | 378 |
Stock compensation, other information |  |  |
Stock options outstanding - weighted average exercise price (USD per share) | $ 42.41 | $ 42.18 |
Aggregate intrinsic value, options exercised | $ 0 |  | $ 0
Maximum |  |  |
Stock compensation, other information |  |  |
Aggregate intrinsic value, options exercised |  | $ 1 |

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- Definition Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(2) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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