Intangible Assets (Details 2) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Indefinite-lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 31	$ 30
Impairment Charges	1	1
Net	30	29
Trade names
Indefinite-lived Intangible Assets [Line Items]
Gross Carrying Amount	22	22
Impairment Charges	0	0
Net	22	22
Other
Indefinite-lived Intangible Assets [Line Items]
Gross Carrying Amount	9	8
Impairment Charges	1	1
Net	$ 8	$ 7