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Employee Benefits | 9 Months Ended
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Sep. 30, 2021
Retirement Benefits [Abstract] |
Employee Benefits | Employee Benefits The following table provides the components of the net periodic (benefit) cost recognized in the Condensed Consolidated Statements of Income for Aon’s significant U.K., U.S., and other major pension plans, which are located in the Netherlands and Canada. Service cost is reported in Compensation and benefits and all other components are reported in Other income (expense) as follows (in millions):
| Three Months Ended September 30,
| U.K. |  | U.S. |  | Other
| 2021 |  | 2020 |  | 2021 |  | 2020 |  | 2021 |  | 2020
Service cost | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Interest cost | 16 |  |  | 22 |  |  | 15 |  |  | 22 |  |  | 3 |  |  | 5 |
Expected return on plan assets, net of administration expenses | (34) |  |  | (40) |  |  | (33) |  |  | (34) |  |  | (8) |  |  | (8) |
Amortization of prior-service cost | 1 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Amortization of net actuarial loss | 8 |  |  | 8 |  |  | 19 |  |  | 17 |  |  | 4 |  |  | 3 |
Total net periodic (benefit) cost | $ | (9) |  |  | $ | (10) |  |  | $ | 1 |  |  | $ | 5 |  |  | $ | (1) |  |  | $ | — |
| Nine Months Ended September 30,
| U.K. |  | U.S. |  | Other
| 2021 |  | 2020 |  | 2021 |  | 2020 |  | 2021 |  | 2020
Service cost | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Interest cost | 49 |  |  | 65 |  |  | 43 |  |  | 64 |  |  | 9 |  |  | 14 |
Expected return on plan assets, net of administration expenses | (103) |  |  | (118) |  |  | (97) |  |  | (100) |  |  | (24) |  |  | (25) |
Amortization of prior-service cost | 3 |  |  | 1 |  |  | — |  |  | — |  |  | — |  |  | — |
Amortization of net actuarial loss | 24 |  |  | 23 |  |  | 58 |  |  | 51 |  |  | 11 |  |  | 9 |
Net periodic (benefit) cost | (27) |  |  | (29) |  |  | 4 |  |  | 15 |  |  | (4) |  |  | (2) |
Loss on pension settlement | — |  |  | 2 |  |  | — |  |  | — |  |  | — |  |  | — |
Total net periodic (benefit) cost | $ | (27) |  |  | $ | (27) |  |  | $ | 4 |  |  | $ | 15 |  |  | $ | (4) |  |  | $ | (2) |
In the second quarter of 2020, the Company recognized a non-cash settlement charge of approximately £2 million ($2 million using June 30, 2020 exchange rates). Settlements from a certain U.K. pension plan exceeded the plan’s service and interest cost. This triggered settlement accounting which required the immediate recognition of a portion of the accumulated losses associated with the plan. Contributions Assuming no additional contributions are agreed to with, or required by, the pension plan trustees, the Company expects to make total cash contributions of approximately $8 million, $73 million, and $19 million, (at December 31, 2020 exchange rates) to its significant U.K., U.S., and other major pension plans, respectively, during 2021. In the first quarter of 2021, the Company revised its full year expected pension contributions in the U.S. following the enactment of the American Rescue Plan Act of 2021. The following table summarizes contributions made to the Company’s significant pension plans (in millions):
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2021 |  | 2020 |  | 2021 |  | 2020
Contributions to U.K. pension plans |  | $ | 2 |  |  | $ | 2 |  |  | $ | 8 |  |  | $ | 6 |
Contributions to U.S. pension plans |  | 8 |  |  | 44 |  |  | 54 |  |  | 82 |
Contributions to other major pension plans |  | 2 |  |  | 3 |  |  | 12 |  |  | 14 |
Total contributions |  | $ | 12 |  |  | $ | 49 |  |  | $ | 74 |  |  | $ | 102 |

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