| Revenue | 9,930b | 9,483b | 8,866b |
| Expenses | — | — | — |
| Salaries and benefits | -5,502b | -5,344b | -5,065b |
| Other operating expenses | -1,833b | -1,815b | -1,695b |
| Impairment | -1,042b | | -81b |
| Depreciation | -230b | -242b | -255b |
| Amortization | -226b | -263b | -312b |
| Restructuring costs | -61b | -68b | -99b |
| Transaction and integration | -409b | -386b | -181b |
| Total expenses | -9,303b | -8,118b | -7,688b |
| Operating income | 627b | 1,365b | 1,178b |
| Other (loss)/income, net | -260b | 149b | 288b |
| Interest expense | -263b | -235b | -208b |
| Income from continuing operations before income taxes | 104b | 1,279b | 1,258b |
| Provision for income taxes | -192b | -215b | -194b |
| (Loss)/income from continuing operations | -88b | 1,064b | 1,064b |
| Loss from discontinued operations, net of tax | | | -40b |
| Net (loss)/income | -88b | 1,064b | 1,024b |
| Income attributable to non-controlling interests | -10b | -9b | -15b |
| Net (loss)/income attributable to WTW | -98b | 1,055b | 1,009b |