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Share-based Compensation (Summary of Stock Award Information) (Schedule) (Details) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Assumptions used to estimate fair value of options, SARs and PSARs granted: |  |  |
Cash received from exercise of options | $ 2.3 | $ 5.7 | $ 11.7
Income tax benefit related to share-based compensation of our continuing operations (in millions) | $ 21.0 | $ 18.6 | $ 9.8
Options, SARs and PSARs | Minimum |  |  |
Assumptions used to estimate fair value of options, SARs and PSARs granted: |  |  |
Risk-free interest rate | 1.59% | 2.68% | 1.66%
Expected life | 3 years 2 months 12 days | 3 years | 3 years
Expected volatility | 29.90% | 30.20% | 25.90%
Expected dividend yield | 0.00% | 0.00% | 0.00%
Options, SARs and PSARs | Maximum |  |  |
Assumptions used to estimate fair value of options, SARs and PSARs granted: |  |  |
Risk-free interest rate | 2.45% | 2.92% | 2.16%
Expected life | 6 years 2 months 12 days | 4 years 2 months 12 days | 6 years 4 months 24 days
Expected volatility | 33.80% | 33.60% | 37.90%
Expected dividend yield | 0.00% | 0.00% | 0.00%
Options |  |  |
Assumptions used to estimate fair value of options, SARs and PSARs granted: |  |  |
Weighted average grant-date fair value per share of awards granted, options (in dollars per share) | $ 8.60 | $ 8.99 | $ 9.40
Total intrinsic value of awards exercised | $ 4.2 | $ 3.8 | $ 13.4
SARs |  |  |
Assumptions used to estimate fair value of options, SARs and PSARs granted: |  |  |
Weighted average grant-date fair value per share of awards granted, other than options (in dollars per share) | $ 6.79 | $ 7.92 | $ 8.60
Total intrinsic value of awards exercised | $ 13.6 | $ 22.5 | $ 74.8
PSARs |  |  |
Assumptions used to estimate fair value of options, SARs and PSARs granted: |  |  |
Weighted average grant-date fair value per share of awards granted, other than options (in dollars per share) | $ 6.92 | $ 0 | $ 0
RSUs |  |  |
Assumptions used to estimate fair value of options, SARs and PSARs granted: |  |  |
Weighted average grant-date fair value per share of awards granted, other than options (in dollars per share) | 24.66 | 28.72 | 31.24
RSAs |  |  |
Assumptions used to estimate fair value of options, SARs and PSARs granted: |  |  |
Weighted average grant-date fair value per share of awards granted, other than options (in dollars per share) | 25.29 | 0 | 0
PSUs |  |  |
Assumptions used to estimate fair value of options, SARs and PSARs granted: |  |  |
Weighted average grant-date fair value per share of awards granted, other than options (in dollars per share) | $ 25.00 | $ 23.60 | $ 26.59

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- Definition Amount of cash inflow from issuance of shares under share-based payment arrangement. Includes, but is not limited to, option exercised. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=116856206&loc=SL79508275-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + 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 (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. + 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 (f)(2)(iii) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + 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 (f)(2)(ii) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + 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=116856206&loc=d3e5070-113901 + Details
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- Definition Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + 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 (f)(2)(i) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.D.2) -URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809 + Details
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