Transactions and Agreements with Pfizer (Post-Separation Agreements with Pfizer) (Details) (Pfizer, USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013 Transitional Services Agreement	Jun. 30, 2013 Master Manufacturing and Supply Agreements	Jun. 30, 2013 Employee Matters Agreement	Dec. 31, 2013 Income Taxes Payable
Related Party Transaction [Line Items]
Due to related parties				$ 31
Amount charged under agreement with Pfizer	$ 63	$ 130	$ 99