Company Recorded Restructuring Charges (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
January 1 Balance			$ 40
Charges to earnings	14	12	38	45
Cash paid			(42)
Other adjustments			(1)
September 30 Balance	35		35
Agent Conversions
January 1 Balance			5
Cash paid			(3)
September 30 Balance	2		2
Severance and Related Costs
January 1 Balance			20
Charges to earnings			17
Cash paid			(23)
Other adjustments			(1)
September 30 Balance	13		13
Contractual Obligations and Other
January 1 Balance			15
Charges to earnings			21
Cash paid			(16)
Other adjustments
September 30 Balance	$ 20		$ 20