Restructuring and Other Costs (Details 3) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 48	$ 0	$ 57	$ 0
Restructuring and Related Cost, Expected Cost			180
Commercial Markets [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	4	0	4	0
Restructuring and Related Cost, Expected Cost			11
Consumer Markets [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	1	0	1	0
Restructuring and Related Cost, Expected Cost			3
Individual Life [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	7	0	7	0
Restructuring and Related Cost, Expected Cost			22
Retirement [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	4	0	4	0
Restructuring and Related Cost, Expected Cost			15
Mutual Funds [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	1	0	1	0
Restructuring and Related Cost, Expected Cost			4
Life Other Operations [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	3	0	3	0
Restructuring and Related Cost, Expected Cost			11
Corporate [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	28	0	37	0
Restructuring and Related Cost, Expected Cost			$ 114