Summary Of Significant Accounting Policies - Amortized Cost by Credit Quality (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Sales-type Lease, Net Investment in Lease, Credit Quality Indicator [Line Items]
2022	$ 168.3
2021	157.9
2020	79.6
2019	22.2
2018	6.3
Prior	0.7
Subtotal	435.0	$ 392.6
High
Sales-type Lease, Net Investment in Lease, Credit Quality Indicator [Line Items]
2022	67.3
2021	86.7
2020	42.6
2019	14.5
2018	2.2
Prior	0.4
Subtotal	213.7
Moderate
Sales-type Lease, Net Investment in Lease, Credit Quality Indicator [Line Items]
2022	98.4
2021	69.6
2020	34.1
2019	7.7
2018	4.1
Prior	0.3
Subtotal	214.2
Low
Sales-type Lease, Net Investment in Lease, Credit Quality Indicator [Line Items]
2022	2.6
2021	1.6
2020	2.9
2019	0.0
2018	0.0
Prior	0.0
Subtotal	$ 7.1

Amount, before allowance for credit loss, of net investment in sales-type lease.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7A
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953401-111524

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 14
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919253-210447

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 30
-Section 50
-Paragraph 6
-URI https://asc.fasb.org/extlink&oid=124258985&loc=SL77919379-209981

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

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 6
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919232-210447

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