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Segment Information (Tables) | 12 Months Ended
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Dec. 31, 2014
Segment Reporting [Abstract] |
Schedule of total revenue by business segments | Aon's total revenue is as follows (in millions):
Years ended December 31 | 2014 |  | 2013 |  | 2012
Risk Solutions | $ | 7,834 |  |  | $ | 7,789 |  |  | $ | 7,632 |
HR Solutions | 4,264 |  |  | 4,057 |  |  | 3,925 |
Intersegment eliminations | (53 | ) |  | (31 | ) |  | (43 | )
Total revenue | $ | 12,045 |  |  | $ | 11,815 |  |  | $ | 11,514 |
Schedule of commissions, fees and other revenues by products | Commissions, fees and other revenues by product are as follows (in millions):
Years ended December 31 | 2014 |  | 2013 |  | 2012
Retail brokerage | $ | 6,334 |  |  | $ | 6,256 |  |  | $ | 6,089 |
Reinsurance brokerage | 1,474 |  |  | 1,505 |  |  | 1,505 |
Total Risk Solutions Segment | 7,808 |  |  | 7,761 |  |  | 7,594 |
Consulting services | 1,700 |  |  | 1,626 |  |  | 1,585 |
Outsourcing | 2,607 |  |  | 2,469 |  |  | 2,372 |
Intrasegment | (43 | ) |  | (38 | ) |  | (32 | )
Total HR Solutions Segment | 4,264 |  |  | 4,057 |  |  | 3,925 |
Intersegment | (53 | ) |  | (31 | ) |  | (43 | )
Total commissions, fees and other revenue | $ | 12,019 |  |  | $ | 11,787 |  |  | $ | 11,476 |
Schedule of fiduciary investment income by business segments | Fiduciary investment income by segment is as follows (in millions):
Years ended December 31 | 2014 |  | 2013 |  | 2012
Risk Solutions | $ | 26 |  |  | $ | 28 |  |  | $ | 38 |
HR Solutions | — |  |  | — |  |  | — |
Total fiduciary investment income | $ | 26 |  |  | $ | 28 |  |  | $ | 38 |
Schedule of reconciliation of segment income before tax to income from continuing operations before income taxes | A reconciliation of segment operating income before tax to income before income taxes is as follows (in millions):
Years ended December 31 | 2014 |  | 2013 |  | 2012
Risk Solutions | $ | 1,648 |  |  | $ | 1,540 |  |  | $ | 1,493 |
HR Solutions | 485 |  |  | 318 |  |  | 289 |
Segment income before income taxes | 2,133 |  |  | 1,858 |  |  | 1,782 |
Unallocated expenses | (167 | ) |  | (187 | ) |  | (186 | )
Interest income | 10 |  |  | 9 |  |  | 10 |
Interest expense | (255 | ) |  | (210 | ) |  | (228 | )
Other income | 44 |  |  | 68 |  |  | 2 |
Income before income taxes | $ | 1,765 |  |  | $ | 1,538 |  |  | $ | 1,380 |
Schedule of consolidated revenue by geographic area | Consolidated revenue by geographic area is as follows (in millions):
Years ended December 31 | Total |  | United States |  | Americas other than U.S. |  | United Kingdom |  | Europe, Middle East, & Africa |  | Asia Pacific
2014 | $ | 12,045 |  |  | $ | 5,824 |  |  | $ | 1,176 |  |  | $ | 1,623 |  |  | $ | 2,189 |  |  | $ | 1,233 |
2013 | 11,815 |  |  | 5,574 |  |  | 1,214 |  |  | 1,544 |  |  | 2,304 |  |  | 1,179 |
2012 | 11,514 |  |  | 5,336 |  |  | 1,190 |  |  | 1,541 |  |  | 2,271 |  |  | 1,176 |
Schedule of consolidated non-current assets by geographic area | Consolidated non-current assets by geographic area are as follows (in millions):
As of December 31 | Total |  | United States |  | Americas other than U.S. |  | United Kingdom |  | Europe, Middle East, & Africa |  | Asia Pacific
2014 | $ | 13,805 |  |  | $ | 7,793 |  |  | $ | 493 |  |  | $ | 2,700 |  |  | $ | 2,179 |  |  | $ | 640 |
2013 | 13,728 |  |  | 7,720 |  |  | 559 |  |  | 2,392 |  |  | 2,440 |  |  | 617 |

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