|
Business Combinations (Details) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Dec. 31, 2012
|
Dec. 31, 2011
|
Dec. 31, 2010
|
Dec. 31, 2012
Pending Acquisition [Member]
|
Dec. 31, 2011
Acquisitions of insurance brokerage businesses [Member]
|
Dec. 31, 2010
Acquisitions of insurance brokerage businesses [Member]
|
Dec. 31, 2012
EverKey Global Partners Limited/EverKey Global Management LLC/EverKey Global Partners (GP), LLC/EverKey Global Focus (GP), LLC - Bahamas/New York, New York [Member]
|
Dec. 31, 2012
Burdale Financial Holdings Limited/Certain Assets of Burdale Capital Finance, Inc. - England/Stamford, Connecticut [Member]
|
Dec. 31, 2012
Energy Lending Business of BNP Paribas, SA - Houston, Texas [Member]
|
Dec. 31, 2012
Merlin Securities, LLC/Merlin Canada LTD./Certain Assets & Liabilities of Merlin Group Holdings, LLC - San Francisco, California/Toronto, Ontario [Member]
|
Dec. 31, 2011
CP Equity, LLC - Denver, Colorado [Member]
|
Dec. 31, 2011
Certain assets of Foreign Current Exchange Corp - Orlando, Florida [Member]
|
Dec. 31, 2011
LaCrosse Holdings, LLC - Minneapolis, Minnesota [Member]
|
Dec. 31, 2010
Certain assets of GMAC Commercial Finance, LLC - New York, New York [Member]
|
|
| Business Acquisition [Line Items] | ||||||||||||||
| Date | Jan. 01, 2012 | Feb. 01, 2012 | Apr. 20, 2012 | Aug. 01, 2012 | Jul. 01, 2011 | Aug. 01, 2011 | Nov. 30, 2011 | Apr. 30, 2010 | ||||||
| Various Dates | Various | Various | ||||||||||||
| Business Acquisition, Number Completed during period | 0 | 7 | 5 | |||||||||||
| Business Acquisition, Purchase Price Allocation, Assets Acquired | $ 4,801 | $ 588 | $ 470 | $ 37 | $ 40 | $ 7 | $ 874 | $ 3,639 | $ 281 | $ 389 | $ 46 | $ 116 | $ 430 | |