XML 102 R59.htm IDEA: XBRL DOCUMENT v3.8.0.1
Summary of Significant Accounting Policies - Basis of Presentation (Details)
$ in Millions
3 Months Ended 12 Months Ended
Jul. 01, 2016
USD ($)
Sep. 30, 2017
USD ($)
Mar. 31, 2017
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2017
segment
Dec. 31, 2017
line_of_business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Number of lines of business         2 2
Boston Financial Data Services, Inc. and International Financial Data Services            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Cash received     $ 175      
Common stock received     $ 158      
Gain on sale       $ 30    
Alternative Trading Platform            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Gain on sale   $ 26        
GE Asset Management            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Purchase price $ 485