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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Amortized Cost Basis by Year of Origination and Credit Quality Indicator (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Sales-type Lease, Net Investment in Lease, Credit Quality Indicator [Line Items]
2020	$ 75.3
2019	86.0
2018	42.6
2017	18.4
2016	7.9
Prior	2.7
Net investment in sales-type leases	232.9	$ 191.9
High
Sales-type Lease, Net Investment in Lease, Credit Quality Indicator [Line Items]
2020	41.3
2019	51.6
2018	18.7
2017	10.0
2016	3.1
Prior	2.6
Net investment in sales-type leases	127.3
Moderate
Sales-type Lease, Net Investment in Lease, Credit Quality Indicator [Line Items]
2020	30.4
2019	34.4
2018	22.1
2017	7.5
2016	2.5
Prior	0.1
Net investment in sales-type leases	97.0
Low
Sales-type Lease, Net Investment in Lease, Credit Quality Indicator [Line Items]
2020	3.6
2019	0.0
2018	1.8
2017	0.9
2016	2.3
Prior	0.0
Net investment in sales-type leases	$ 8.6

X

- Definition

Amount of net investment in sales-type lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 30
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=119202524&loc=SL77919379-209981

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Amount of net investment in sales-type lease originated five or more years prior to latest fiscal year.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919232-210447

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Amount of net investment in sales-type lease originated four years prior to latest fiscal year.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919232-210447

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Amount of net investment in sales-type lease originated in current fiscal year.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919232-210447

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Amount of net investment in sales-type lease originated in fiscal year prior to latest fiscal year.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919232-210447

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Amount of net investment in sales-type lease originated three years prior to latest fiscal year.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919232-210447

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Amount of net investment in sales-type lease originated two years prior to latest fiscal year.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919232-210447

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