Other Intangible Assets Schedule of Other Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Finite-lived intangible assets	$ 79	$ 83
Accumulated amortization	59	43
Indefinite-lived intangible assets	69	73
Total other intangible assets	148	156
Total intangible assets, accumulated amortization	59	43
Value of business acquired [Member]
Finite-lived intangible assets	59	62
Accumulated amortization	57	43
Trade name [Member]
Finite-lived intangible assets	8	8
Accumulated amortization	1
Distribution channel [Member]
Finite-lived intangible assets	12	13
Accumulated amortization	$ 1