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Non-vested Award Activity (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Stock-settled awards |  |  |
Stock-based Payment Award |  |  |
Non-vested as of January 1, 2018 | 5.7 |  |
Nonvested as of January 1, 2018, weighted-average grant date fair value | $ 22.18 |  |
Granted | 0.9 |  |
Granted, Weighted-average grant-date fair value | $ 26.96 | $ 20.70 | $ 22.78
Vested | (1.8) |  |
Vested, Weighted-average grant date fair value | $ 23.01 |  |
Forfeited | (0.7) |  |
Forfeited, Weighted-average grant date fair value | $ 22.12 |  |
Non-vested as of December 31, 2018 | 4.1 | 5.7 |
Nonvested as of December 31, 2018, weighted-average grant date fair value | $ 22.82 | $ 22.18 |
Total unrecognized compensation expense remaining | $ 28.7 |  |
Weighted-average years expected to be recognized over | 6 months |  |
Cash-settled awards |  |  |
Stock-based Payment Award |  |  |
Non-vested as of January 1, 2018 | 0.1 |  |
Nonvested as of January 1, 2018, weighted-average grant date fair value | $ 22.40 |  |
Granted | 0.0 |  |
Granted, Weighted-average grant-date fair value | $ 0 | $ 21.02 | $ 22.83
Vested | 0.0 |  |
Vested, Weighted-average grant date fair value | $ 23.57 |  |
Forfeited | 0.0 |  |
Forfeited, Weighted-average grant date fair value | $ 22.41 |  |
Non-vested as of December 31, 2018 | 0.1 | 0.1 |
Nonvested as of December 31, 2018, weighted-average grant date fair value | $ 21.78 | $ 22.40 |
Total unrecognized compensation expense remaining | $ 0.6 |  |
Weighted-average years expected to be recognized over | 8 months 12 days |  |
Cash awards granted during the period target value | $ 85.8 | $ 54.5 | $ 22.3
Incentive compensation expense, non share-based | $ 47.8 | $ 25.5 | $ 15.6
Performance-based awards |  |  |
Stock-based Payment Award |  |  |
Non-vested as of January 1, 2018 | 4.8 |  |
Nonvested as of January 1, 2018, weighted-average grant date fair value | $ 19.61 |  |
Granted | 0.5 |  |
Granted, Weighted-average grant-date fair value | $ 21.98 | $ 18.67 | $ 20.16
Vested | (1.5) |  |
Vested, Weighted-average grant date fair value | $ 21.22 |  |
Forfeited | (0.5) |  |
Forfeited, Weighted-average grant date fair value | $ 19.71 |  |
Non-vested as of December 31, 2018 | 3.3 | 4.8 |
Nonvested as of December 31, 2018, weighted-average grant date fair value | $ 19.18 | $ 19.61 |
Total unrecognized compensation expense remaining | $ 21.1 |  |
Weighted-average years expected to be recognized over | 1 year 3 months 18 days |  |
Cash awards granted during the period target value | $ 40.4 | $ 43.5 | $ 40.7
Incentive compensation expense, non share-based | $ 52.1 | $ 29.2 | $ 39.9

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- Definition Represents the expense recognized during the period arising from cash-based incentive compensation arrangements with employees, directors and certain consultants qualifying for treatment as employees. + References No definition available. + Details
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- Definition Amount of cost not yet recognized for nonvested award under share-based payment arrangement. + 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 (i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Weighted-average period over which cost not yet recognized is expected to be recognized for 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 (i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting 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 (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event. + 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)(3) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The number of grants made 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=120381028&loc=d3e5070-113901 + 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=120381028&loc=d3e5070-113901 + Details
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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + 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)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options. + 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)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting 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 (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement. + 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)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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