Contingencies (Health Care Cost Recovery Litigation Narrative) (Details)	1 Months Ended	3 Months Ended		9 Months Ended
	Nov. 30, 1998 USD ($) state	Sep. 30, 2016 USD ($) case	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($) case	Sep. 30, 2015 USD ($)	Oct. 26, 2015 case	Oct. 27, 2014 case
Health Care Cost Recovery Actions [Member]
Loss Contingencies [Line Items]
Number of cases pending						1	1
Number of states with settled litigation | state	46
State Settlement Agreements annual payments | $	$ 9,400,000,000
State Settlement Agreements attorney fees annual cap | $	$ 500,000,000
Cost of Sales [Member] | Health Care Cost Recovery Actions [Member]
Loss Contingencies [Line Items]
Litigation settlement, amount | $		$ (1,200,000,000)	$ (1,100,000,000)	$ (3,600,000,000)	$ (3,300,000,000)
Cost of Sales [Member] | Health Care Cost Recovery Actions, 2004-2014 NPM Adjustment [Member]
Loss Contingencies [Line Items]
Litigation settlement, amount | $			$ 126,000,000	$ (12,000,000)	$ 126,000,000
New York [Member] | Health Care Cost Recovery Actions, Medicare as Secondary Payer Case [Member]
Loss Contingencies [Line Items]
Number of claims dismissed				2
Florida [Member] | Health Care Cost Recovery Actions, Medicare as Secondary Payer Case [Member]
Loss Contingencies [Line Items]
Number of claims dismissed				2
Massachusetts [Member] | Health Care Cost Recovery Actions, Medicare as Secondary Payer Case [Member]
Loss Contingencies [Line Items]
Number of claims dismissed				1
Canada [Member] | Threatened Litigation [Member] | Health Care Cost Recovery Actions [Member]
Loss Contingencies [Line Items]
Number of cases pending		10		10