Contingencies (Health Care Cost Recovery Litigation Narrative) (Details)	1 Months Ended	3 Months Ended		6 Months Ended
	Nov. 30, 1998 USD ($) state	Jun. 30, 2016 USD ($) case	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($) case	Jun. 30, 2015 USD ($)	Jul. 24, 2015 case	Jul. 18, 2014 case
Loss Contingencies [Line Items]
Litigation settlement, amount | $				$ (18,000,000)
Health Care Cost Recovery Actions [Member]
Loss Contingencies [Line Items]
Number of cases pending | case						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)	$ (1,200,000,000)	(2,300,000,000)	$ (2,300,000,000)
Cost of Sales [Member] | Health Care Cost Recovery Actions, 2004-2014 NPM Adjustment [Member]
Loss Contingencies [Line Items]
Litigation settlement, amount | $				$ (12,000,000)
NEW YORK | Health Care Cost Recovery Actions, Medicare as Secondary Payer Case [Member]
Loss Contingencies [Line Items]
Number of claims dismissed | case				2
FLORIDA | Health Care Cost Recovery Actions, Medicare as Secondary Payer Case [Member]
Loss Contingencies [Line Items]
Number of claims dismissed | case				2
MASSACHUSETTS | Health Care Cost Recovery Actions, Medicare as Secondary Payer Case [Member]
Loss Contingencies [Line Items]
Number of claims dismissed | case				1
CANADA | Threatened Litigation [Member] | Health Care Cost Recovery Actions [Member]
Loss Contingencies [Line Items]
Number of cases pending | case		10		10