Restructuring and Other Costs (Details 3) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 20	$ 18
Restructuring and Related Cost, Expected Cost	374
Property Casualty Commercial [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	0	0
Restructuring and Related Cost, Expected Cost	9
Group Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	0	0
Restructuring and Related Cost, Expected Cost	1
Consumer Markets [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	0	0
Restructuring and Related Cost, Expected Cost	3
Mutual Funds [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	0	1
Restructuring and Related Cost, Expected Cost	4
Life Other Operations [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	0	1
Restructuring and Related Cost, Expected Cost	70
Corporate [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	20	16
Restructuring and Related Cost, Expected Cost	$ 287