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Incentive Compensation Plans Stock-based Compensation, Grants in Period Weighted Average (Tables) | 12 Months Ended
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Dec. 31, 2020
Summary of Stock Options Assumptions [Abstract] |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value [Table Text Block] | Stock-based compensation awards expected to be settled in cash have been classified as liabilities in our Consolidated Balance Sheets as of December 31, 2020 and 2019.
|  | Years ended December 31,
|  | 2020 |  | 2019 |  | 2018
Stock-Settled Awards: |  |  |  |  |  |
Awards granted |  | 2.3 |  |  | 2.5 |  |  | 2.1 |
Weighted-average grant-date fair value (per award) |  | $ | 20.70 |  |  | $ | 22.78 |  |  | $ | 23.60 |
Total fair value of vested awards distributed |  | $ | 17.3 |  |  | $ | 15.2 |  |  | $ | 24.2 |
Cash-Settled Awards: |  |  |  |  |  |
Awards granted |  | 0.0 |  |  | 0.0 |  |  | 0.1 |
Weighted-average grant-date fair value (per award) |  | $ | 21.02 |  |  | $ | 22.83 |  |  | $ | 23.62 |
Total fair value of vested awards distributed |  | $ | 0.3 |  |  | $ | 0.9 |  |  | $ | 0.8 |
Performance-Based Awards: |  |  |  |  |  |
Awards granted |  | 2.4 |  |  | 2.1 |  |  | 2.9 |
Weighted-average grant-date fair value (per award) |  | $ | 18.67 |  |  | $ | 20.16 |  |  | $ | 21.13 |
Total fair value of vested awards distributed |  | $ | 53.3 |  |  | $ | 64.9 |  |  | $ | 87.2 |

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- Definition Summary of Stock Options Assumptions [Abstract] + References No definition available. + Details
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- Definition Tabular disclosure of the weighted-average grant-date fair value of equity options or other equity instruments granted during the year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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