Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Earnings Before Income Taxes
Domestic	$ (1,038)	$ (3,245)	$ (581)
Foreign	7,683	5,614	5,913
Total earnings before income taxes	6,645	2,369	5,332
Current
Domestic	1,036	634	226
Foreign	313	341	354
Total current taxes	1,349	975	580
Deferred
Domestic	141	(301)	678
Foreign	11	(79)	(54)
Total deferred taxes	152	(380)	624
Total income taxes	$ 1,501	$ 595	$ 1,204
Effective Tax Rate Reconciliation
Statutory tax rate (as a percent)	35.00%	35.00%	35.00%
State taxes, net of federal benefit (as a percent)	0.10%		0.30%
Effect of foreign operations (as a percent)	(9.40%)	(11.30%)	(11.50%)
U.S. tax credits (as a percent)	(4.50%)	(8.90%)	(2.70%)
Branded prescription drug fee (as a percent)	0.70%	3.70%	0.40%
Valuation allowances (as a percent)	(1.60%)	3.60%	0.10%
All other, net (as a percent)	2.30%	3.00%	1.00%
Effective tax rate (as a percent)	22.60%	25.10%	22.60%
Deferred tax assets
Compensation and employee benefits	$ 584	$ 627
Accruals and reserves	368	376
Chargebacks and rebates	472	297
Deferred revenue	372	382
Depreciation	45	53
Net operating losses and other credit carryforwards	282	125
Other	316	292
Total deferred tax assets	2,439	2,152
Reversal of Valuation allowances	(70)	(172)
Total net deferred tax assets	2,369	1,980
Deferred tax liabilities
Excess of book basis over tax basis of intangible assets	(4,459)	(331)
Excess of book basis over tax basis in investments	(2,958)	(326)
Total deferred tax liabilities	(7,417)	(657)
Deferred tax liabilities net	$ (5,048)
Net deferred tax asset		$ 1,323