XML 58 R28.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2024
Accounting Policies [Abstract] |
Mortgage Loans |
| Year Ended December 31,
(in millions) | 2024 | 2023
Origination of mortgage loans | $ | (10,301.5) |  | (7,877.6) |
Proceeds from the sales of mortgage loans | 10,127.5 |  | 7,668.6 |
Net increase in Warehouse facilities | 178.3 |  | 207.4 |
Disaggregation of Revenue |
| Year Ended December 31,
(in millions) | 2024 | 2023 | 2022
Revenue excluded from scope of ASC Topic 606 | $ | 325.9 |  | 286.3 |  | 293.6 |
Contract with Customer, Contract Asset, Contract Liability, and Receivable | Such contract assets and liabilities are presented below.
(in millions) | December 31, 2024 | December 31, 2023
Contract assets, gross | $ | 388.3 |  | 402.3 |
Contract asset allowance | (3.9) |  | (1.8) |
Contract assets, net | $ | 384.4 |  | 400.5 |
Contract liabilities | $ | 154.7 |  | 166.2 |
Financing Receivable, Allowance for Credit Loss [Table Text Block] | The following table details the changes in the allowance for uncollectible receivables.
(in millions) | 2024 | 2023 | 2022
Allowance as of January 1, | $ | 70.7 |  | 66.7 |  | 67.6 |
Charged to income | 28.2 |  | 22.0 |  | 25.0 |
Write-off of uncollectible receivables | (36.6) |  | (15.8) |  | (23.2) |
Impact of exchange rate movements and other | (1.5) |  | (2.2) |  | (2.7) |
Allowance as of December 31, | $ | 60.8 |  | 70.7 |  | 66.7 |
Property, Plant and Equipment [Table Text Block] | The following table shows the gross value of major asset categories and the standard depreciable lives, as of December 31, 2024, for each of these asset categories.
| December 31, |
($ in millions) | 2024 | 2023 | Depreciable Life
Furniture, fixtures and equipment | $ | 144.9 |  | 145.4 |  | 3 to 13 years
Computer equipment and software | 1,070.7 |  | 987.9 |  | 2 to 7 years
Leasehold improvements | 480.6 |  | 468.2 |  | 1 to 15 years
Other(1) | 63.5 |  | 51.5 |  | 2 to 30 years
Total | 1,759.7 |  | 1,653.0 |  |
Less: Accumulated depreciation | 1,161.6 |  | 1,039.1 |  |
Net property and equipment | $ | 598.1 |  | 613.9 |  |
(1) Other includes certain assets, such as land, which are not depreciated.

X
- Definition Mortgage Loans + References No definition available. + Details
Name: | jll_MortgageLoansTableTextBlock
Namespace Prefix: | jll_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Tabular disclosure of allowance for credit loss on financing receivable. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11B -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-11B Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 + Details
Name: | us-gaap_AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-10 + Details
Name: | us-gaap_ContractWithCustomerAssetAndLiabilityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-5 + Details
Name: | us-gaap_DisaggregationOfRevenueTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 10 -Topic 360 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482099/360-10-50-1 + Details
Name: | us-gaap_PropertyPlantAndEquipmentTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration