Financial Instruments and Fair Value Measures (Details 3) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Assets
Short term investments	$ 96	$ 145
Derivatives in asset position	92	211
Total assets	96	145
Liabilities
Derivatives in liability position	23	243
Total liabilities	31,807	15,254
Cumulative net unrealized holding (losses) on available-for-sale equity securities	(1)
Cumulative net unrealized holding gains on available-for-sale equity securities		3
Quoted prices in active markets for identical assets (Level 1)
Assets
Short term investments	51	68
Total assets	51	68
Liabilities
Total liabilities	30,929	14,715
Significant other observable inputs (Level 2)
Assets
Short term investments	17	13
Total assets	17	13
Liabilities
Total liabilities	878	539
Significant unobservable inputs (Level 3)
Assets
Short term investments	28	64
Total assets	28	64
Recurring
Assets
Cash and equivalents	9,223	8,348
Equity securities	33	13
Interest rate hedges	62
Total assets	9,356	8,581
Liabilities
Interest rate hedges	6	180
Total liabilities	23	243
Recurring | Foreign Currency Contract
Assets
Derivatives in asset position	30	211
Liabilities
Derivatives in liability position	17	63
Recurring | Time deposits
Assets
Short term investments	8	9
Recurring | Quoted prices in active markets for identical assets (Level 1)
Assets
Cash and equivalents	910	1,214
Equity securities	33	13
Total assets	943	1,227
Recurring | Significant other observable inputs (Level 2)
Assets
Cash and equivalents	8,313	7,134
Interest rate hedges	62
Total assets	8,413	7,354
Liabilities
Interest rate hedges	6	180
Total liabilities	23	243
Recurring | Significant other observable inputs (Level 2) | Foreign Currency Contract
Assets
Derivatives in asset position	30	211
Liabilities
Derivatives in liability position	17	63
Recurring | Significant other observable inputs (Level 2) | Time deposits
Assets
Short term investments	$ 8	$ 9