Intangible Assets Schedule of Indefinite Lived Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived Intangible Assets	$ 432	$ 432
Indefinite-Lived Intangible Assets (Excluding Goodwill), Gross	425	425
Indefinite-lived Intangible Assets, Translation Adjustments	7	7
Indefinite-lived intangible asset - momelotinib (formerly CYT387)
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived Intangible Assets	308	308
Other
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived Intangible Assets	$ 117	$ 117