Rendering

Component: (Network and Table)
Network
2408404 - Disclosure - Restructuring Schedule of changes in company's liabilities for its restructuring plans (Details)
(http://www.aon.com/role/RestructuringScheduleOfChangesInCompanysLiabilitiesForItsRestructuringPlansDetails)
TableSchedule of Restructuring and Related Costs [Table]
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0000315293 (http://www.sec.gov/CIK)
Restructuring Cost and Reserve [Line Items]Period [Axis]
2013-01-01 - 2013-12-31
2012-01-01 - 2012-12-31
2011-01-01 - 2011-12-31
Restructuring by Plan [Axis]Restructuring by Plan [Axis]Restructuring by Plan [Axis]
Aon Hewitt Restructuring Plan [Member]Aon Benfield Restructuring Plan [Member]Restructuring 2007 Plan [Member]Other Restructuring Plan [Member]Restructuring Plan [Domain]Aon Hewitt Restructuring Plan [Member]Aon Benfield Restructuring Plan [Member]Restructuring 2007 Plan [Member]Other Restructuring Plan [Member]Restructuring Plan [Domain]Aon Hewitt Restructuring Plan [Member]Aon Benfield Restructuring Plan [Member]Restructuring 2007 Plan [Member]Other Restructuring Plan [Member]Restructuring Plan [Domain]
Restructuring Reserve
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Beginning balance
96,000,000  
3,000,000  
35,000,000  
3,000,000  
137,000,000  
95,000,000  
20,000,000  
50,000,000  
8,000,000  
173,000,000  
88,000,000  
26,000,000  
113,000,000  
10,000,000  
237,000,000  
Expensed
167,000,000  
0  
0  
0  
167,000,000  
94,000,000  
6,000,000  
(3,000,000) 
0  
97,000,000  
98,000,000  
19,000,000  
(11,000,000) 
0  
106,000,000  
Cash payments
(125,000,000) 
(2,000,000) 
(24,000,000) 
(1,000,000) 
(152,000,000) 
(95,000,000) 
(24,000,000) 
(18,000,000) 
(5,000,000) 
(142,000,000) 
(93,000,000) 
(24,000,000) 
(59,000,000) 
(2,000,000) 
(178,000,000) 
Stock compensation
 
 
 
 
 
0  
(1,000,000) 
0  
0  
(1,000,000) 
 
 
 
 
 
Foreign exchange translation and other
5,000,000  
0  
9,000,000  
0  
14,000,000  
2,000,000  
2,000,000  
6,000,000  
0  
10,000,000  
2,000,000  
(1,000,000) 
7,000,000  
0  
8,000,000  
Ending balance
143,000,000  
 
1,000,000  
 
20,000,000  
 
2,000,000  
 
166,000,000  
 
96,000,000  
 
3,000,000  
 
35,000,000  
 
3,000,000  
 
137,000,000  
 
95,000,000  
 
20,000,000  
 
50,000,000  
 
8,000,000  
 
173,000,000