Supplemental Financial Information - Other accrued liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Other Accrued Liabilities:
Accrued rebates payable to government agencies	$ 110	$ 140
Accrued other rebates	296	301
All other	2,175	2,602
Total	2,581	3,043
Accrued wholesaler chargeback rebates	$ 214	$ 170