XML 11 R1.htm IDEA: XBRL DOCUMENT v3.10.0.1
Cover Document - shares
9 Months Ended
Sep. 30, 2018
Oct. 19, 2018
Document Entity Information    
Document Type 10-Q  
Document Period End Date Sep. 30, 2018  
Entity Registrant Name AMERIPRISE FINANCIAL INC  
Entity Common Stock, Shares Outstanding   139,356,365