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Schedule II (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Trade Accounts Receivable [Member] |  |  |  |
Valuation and Qualifying Accounts and Reserves [Roll Forward] |  |  |  |
Balance at Beginning of Period |  | $ 2.5 | $ 0.9 | $ 1.7
Additions, Charged to Income |  | 1.2 | 2.7 | (0.1)
Additions, Other Charges |  | 0.0 | 0.0 | 0.0
Deductions from Reserves | [1] | 1.9 | 1.1 | 0.7
Balance at End of Period |  | 1.8 | 2.5 | 0.9
Finance Receivables – Long-Term [Member] |  |  |  |
Valuation and Qualifying Accounts and Reserves [Roll Forward] |  |  |  |
Balance at Beginning of Period |  | 0.0 | 0.0 | 0.0
Additions, Charged to Income |  | 0.0 | 0.0 | 0.0
Additions, Other Charges |  | 0.0 | 0.0 | 0.0
Deductions from Reserves | [1] | 0.0 | 0.0 | 0.0
Balance at End of Period |  | 0.0 | 0.0 | 0.0
Deferred Tax Assets [Member] |  |  |  |
Valuation and Qualifying Accounts and Reserves [Roll Forward] |  |  |  |
Balance at Beginning of Period |  | 69.9 | 70.0 | 66.5
Additions, Charged to Income |  | (0.9) | (0.1) | 3.5
Additions, Other Charges |  | 0.0 | 0.0 | 0.0
Deductions from Reserves | [1] | 0.0 | 0.0 | 0.0
Balance at End of Period |  | $ 69.0 | $ 69.9 | $ 70.0
[1] | Includes uncollectible accounts written-off.

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- Definition Amount of valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column B)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column E)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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- Definition Amount of decrease in valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column D)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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