XML 55 R43.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Leases (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2024
Leases [Abstract] |
Components of Lease Expense | The components of lease expense are as follows (in millions):
|  | Statement of Earnings |  | Year ended |
Lease Components |  | Classification |  | December 31, 2024 |
Operating lease expense |  | Operating expense |  | $ | 142.5 |
Variable lease expense |  | Operating expense |  |  | 27.4 |
Sublease income |  | Investment income |  |  | (1.4 | )
Total net lease expense |  |  |  | $ | 168.5 |
Summary of Supplemental Cash Flow Information Related to Leases |
|  | Year ended |
Supplemental Cash Flow Information Related to Leases (in millions) |  | December 31, 2024 |
Cash paid for amounts included in the measurement of lease liabilities: |  |  |
Operating cash flows from operating leases |  | $ | 124.1 |
Right-of-use assets obtained in exchange for new operating lease liabilities |  | $ | 98.7 |
Summary of Supplemental Balance Sheet Information Related to Leases | Supplemental balance sheet information related to leases is as follows (in millions, except lease term and discount rate):
Lease Components |  | Balance Sheet Classification |  | December 31, 2024 |
Lease right-of-use assets |  | Right-of-use assets |  | $ | 377.8 |
Other current lease liabilities |  | Accrued compensation and other current liabilities |  |  | 91.8 |
Lease liabilities |  | Lease liabilities - noncurrent |  |  | 328.1 |
Total lease liabilities |  |  |  | $ | 419.9 |
Weighted-average remaining lease term, years |  |  |  |  | 5.0 |
Weighted-average discount rate |  |  |  |  | 4.5 | %
Maturities of Operating Lease Liabilities | Maturities of operating lease liabilities for each of the next five years and thereafter are as follows (in millions):
2025 |  | $ | 113.9 |
2026 |  |  | 103.6 |
2027 |  |  | 83.8 |
2028 |  |  | 62.8 |
2029 |  |  | 33.9 |
Thereafter |  |  | 74.3 |
Total lease payments |  |  | 472.3 |
Less interest |  |  | (52.4 | )
Total |  | $ | 419.9 |

X
- Definition Tabular disclosure of operating lease related assets and liabilities and other related information. + References No definition available. + Details
Name: | ajg_OperatingLeaseRelatedAssetsAndLiabilitiesAndOtherRelatedInformation
Namespace Prefix: | ajg_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of operating lease related cash flow information. + References No definition available. + Details
Name: | ajg_OperatingLeasesCashFlowRelatedInformation
Namespace Prefix: | ajg_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-4 + Details
Name: | us-gaap_LeaseCostTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-6 + Details
Name: | us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration