XML 58 R46.htm IDEA: XBRL DOCUMENT
v3.22.2.2

Commitments and Contingencies (Details) - USD ($) $ in Millions | 9 Months Ended |
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract] |  |  |
Loss Contingency, Receivable | $ 22.5 |  | $ 22.5
Loan subject to loss-sharing arrangements, aggregate unpaid principal amount | 17,000.0 |  | 15,400.0
Loan loss accrual | 26.9 |  | 24.6
Loan loss guarantee reserve | 20.3 |  | 22.9
Loss Contingency Accrual [Roll Forward] |  |  |
Loss Contingency, Receivable | 22.5 |  | 22.5
Loan loss guarantee reserve | 20.3 |  | $ 22.9
Insurance Claims [Member] |  |  |
Loss Contingency Accrual [Roll Forward] |  |  |
Loss Contingency Accrual | 1.2 | $ 48.2 |
Loss Contingency Accrual, Provision | 0.0 | 1.5 |
Loss Contingency Accrual, Provision Adjustment | (0.1) | (10.8) |
Loss Contingency Accrual, Payments | (0.2) | (13.1) |
Loss Contingency Accrual | $ 0.9 | $ 25.8 |

X
- Definition Loan loss accrual + References No definition available. + Details
Name: | jll_Loanlossaccrual
Namespace Prefix: | jll_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition contingent reserve for loss sharing program + References No definition available. + Details
Name: | jll_Loanlossguaranteereserve
Namespace Prefix: | jll_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Loan subject to loss-sharing arrangements, aggregate unpaid principal amount + References No definition available. + Details
Name: | jll_Loansubjecttolosssharingarrangementsaggregateunpaidprincipalamount
Namespace Prefix: | jll_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Loss Contingency Accrual, Provision Adjustment + References No definition available. + Details
Name: | jll_LossContingencyAccrualProvisionAdjustment
Namespace Prefix: | jll_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of loss contingency liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349 Reference 2: http://www.xbrl.org/2003/role/recommendedDisclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 10 -URI https://asc.fasb.org/extlink&oid=121557415&loc=d3e14615-108349 + Details
Name: | us-gaap_LossContingencyAccrualAtCarryingValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of cash outflow reducing loss contingency liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349 + Details
Name: | us-gaap_LossContingencyAccrualPayments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount charged against operating income increasing loss contingency liability, after adjustments to reduce previously estimated charges. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349 + Details
Name: | us-gaap_LossContingencyAccrualProvision
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_LossContingencyAccrualRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of receivable related to a loss contingency accrual. For example, an insurance recovery receivable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 3 -URI https://asc.fasb.org/extlink&oid=124440162&loc=d3e12053-110248 + Details
Name: | us-gaap_LossContingencyReceivable
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=us-gaap_InsuranceClaimsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |