XML 56 R30.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Other Financial Data (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2021
Other Financial Data [Abstract] |
Components of Other Income | The components of Other income are as follows (in millions):
| Years Ended December 31
| 2021 |  | 2020 |  | 2019
Foreign currency remeasurement | $ | 26 |  |  | $ | (12) |  |  | $ | 9 |
Gain from disposals of business | 142 |  |  | 25 |  |  | 13 |
Pension and other postretirement | 21 |  |  | 13 |  |  | 9 |
Equity earnings | 8 |  |  | 4 |  |  | 4 |
Extinguishment of debt | — |  |  | (7) |  |  | — |
Financial instruments | (45) |  |  | (10) |  |  | (35) |
Total | $ | 152 |  |  | $ | 13 |  |  | $ | — |
Schedule of Allowance for Doubtful Accounts | Changes in the net carrying amount of allowance for doubtful accounts are as follows (in millions):
| 2021 |  | 2020 |  | 2019
Balance at beginning of period | $ | 98 |  |  | $ | 70 |  |  | $ | 62 |
Adoption of new accounting guidance (1) | — |  |  | 7 |  |  | — |
Adjusted balance at beginning of period | 98 |  |  | 77 |  |  | 62 |
Provision | 26 |  |  | 29 |  |  | 27 |
Accounts written off, net of recoveries | (37) |  |  | (6) |  |  | (19) |
Foreign currency translation and other | 3 |  |  | (2) |  |  | — |
Balance at end of period | $ | 90 |  |  | $ | 98 |  |  | $ | 70 |
(1) The adoption of the new accounting standard on the measurement of credit losses on January 1, 2020 resulted in addition to the Allowance for doubtful accounts of $7 million. After tax impacts, this resulted in a $6 million decrease to Retained earnings. Refer to Note 2 “Summary of Significant Accounting Principles and Practices” for further information.
Schedule of Other Current Assets | The components of Other current assets are as follows (in millions):
As of December 31 | 2021 |  | 2020
Costs to fulfill contracts with customers(1) | $ | 361 |  |  | $ | 339 |
Taxes receivable | 53 |  |  | 95 |
Prepaid expenses | 137 |  |  | 111 |
Other | 165 |  |  | 79 |
Total | $ | 716 |  |  | $ | 624 |
(1)Refer to Note 3 “Revenue from Contracts with Customers” for further information.
Components of Fixed Assets, Net | The components of Fixed assets, net are as follows (in millions):
As of December 31 | 2021 |  | 2020
Software | $ | 797 |  |  | $ | 808 |
Leasehold improvements | 425 |  |  | 375 |
Computer equipment | 268 |  |  | 249 |
Furniture, fixtures and equipment | 279 |  |  | 246 |
Construction in progress | 45 |  |  | 155 |
Other | 33 |  |  | 34 |
Fixed assets, gross | 1,847 |  |  | 1,867 |
Less: Accumulated depreciation | 1,318 |  |  | 1,268 |
Fixed assets, net | $ | 529 |  |  | $ | 599 |
Schedule of Other Non-current Assets | The components of Other non-current assets are as follows (in millions):
As of December 31 | 2021 |  | 2020
Costs to obtain contracts with customers (1) | $ | 179 |  |  | $ | 184 |
Investments | 64 |  |  | 74 |
Leases (2) | 63 |  |  | 89 |
Taxes receivable | 95 |  |  | 125 |
Other | 111 |  |  | 138 |
Total | $ | 512 |  |  | $ | 610 |
(1) Refer to Note 3 “Revenue from Contracts with Customers” for further information. (2) Refer to Note 8 “Lease Commitments” for further information.
Schedule of Other Current Liabilities | The components of Other current liabilities are as follows (in millions):
As of December 31 | 2021 |  | 2020
Deferred revenue (1) | $ | 321 |  |  | $ | 296 |
Taxes payable | 149 |  |  | 80 |
Leases (2) | 213 |  |  | 234 |
Other | 648 |  |  | 561 |
Total | $ | 1,331 |  |  | $ | 1,171 |
(1)$553 million and $454 million was recognized in the Consolidated Statements of Income during the years ended December 31, 2021 and December 31, 2020, respectively. (2)Refer to Note 8 “Lease Commitments” for further information.
Schedule of Other Non-current Liabilities | The components of Other non-current liabilities are as follows (in millions):
As of December 31 | 2021 |  | 2020
Taxes payable (1) | $ | 609 |  |  | $ | 561 |
Leases (2) | 46 |  |  | 65 |
Compensation and benefits | 58 |  |  | 53 |
Deferred revenue | 70 |  |  | 76 |
Other | 127 |  |  | 140 |
Total | $ | 910 |  |  | $ | 895 |
(1)Includes $145 million for the non-current portion of the transition tax as of December 31, 2021 and December 31, 2020. Refer to Note 9 “Income Taxes” for further information on the transition tax. (2)Refer to Note 8 “Lease Commitments” for further information.

X
- Definition Other Financial Data [Abstract] + References No definition available. + Details
Name: | aon_OtherFinancialDataAbstract
Namespace Prefix: | aon_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the components of property, plant and equipment. + References No definition available. + Details
Name: | aon_ScheduleOfPropertyPlantAndEquipmentComponentsTableTextBlock
Namespace Prefix: | aon_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule of Accounts, Notes, Loans and Financing Receivable Allowance for Doubtful Accounts [Table Text Block] + References No definition available. + Details
Name: | aon_ScheduleofAccountsNotesLoansandFinancingReceivableAllowanceforDoubtfulAccountsTableTextBlock
Namespace Prefix: | aon_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of other current liabilities. + References No definition available. + Details
Name: | us-gaap_OtherCurrentLiabilitiesTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of other noncurrent liabilities. + References No definition available. + Details
Name: | us-gaap_OtherNoncurrentLiabilitiesTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of noncurrent assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_ScheduleOfOtherAssetsNoncurrentTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the carrying amounts of other current assets. + References No definition available. + Details
Name: | us-gaap_ScheduleOfOtherCurrentAssetsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the components of non-operating income or non-operating expense that may include amounts earned from dividends, interest on securities, gains (losses) on securities sold, equity earnings of unconsolidated affiliates, net gain (loss) on sales of business, interest expense and other miscellaneous income or expense items. + References No definition available. + Details
Name: | us-gaap_ScheduleOfOtherNonoperatingIncomeExpenseTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration