Financial Instruments and Fair Value Measures (Details 3) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Assets
Time deposits	$ 37	$ 145
Derivatives in asset position	70	211
Total assets	37	145
Liabilities
Derivatives in liability position	102	243
Total liabilities	31,565	15,254
Cumulative net unrealized holding gains on available-for-sale equity securities	47	3
Quoted prices in active markets for identical assets (Level 1)
Assets
Time deposits		68
Total assets		68
Liabilities
Total liabilities	27,061	14,715
Significant other observable inputs (Level 2)
Assets
Time deposits		13
Total assets		13
Liabilities
Total liabilities	4,504	539
Significant unobservable inputs (Level 3)
Assets
Time deposits	37	64
Total assets	37	64
Fair Value Measurements Recurring
Assets
Cash and equivalents	8,399	8,348
Equity securities	111	13
Interest rate hedges	9
Derivatives in asset position		211
Total assets	8,588	8,581
Liabilities
Interest rate hedges	81	180
Derivatives in liability position	21	63
Total liabilities	102	243
Fair Value Measurements Recurring | Foreign Currency Contract
Assets
Derivatives in asset position	61
Fair Value Measurements Recurring | Bank Time Deposits
Assets
Time deposits	8	9
Fair Value Measurements Recurring | Quoted prices in active markets for identical assets (Level 1)
Assets
Cash and equivalents	798	1,214
Equity securities	111	13
Total assets	909	1,227
Fair Value Measurements Recurring | Significant other observable inputs (Level 2)
Assets
Cash and equivalents	7,601	7,134
Interest rate hedges	9
Derivatives in asset position		211
Total assets	7,679	7,354
Liabilities
Interest rate hedges	81	180
Derivatives in liability position	21	63
Total liabilities	102	243
Fair Value Measurements Recurring | Significant other observable inputs (Level 2) | Foreign Currency Contract
Assets
Derivatives in asset position	61
Fair Value Measurements Recurring | Significant other observable inputs (Level 2) | Bank Time Deposits
Assets
Time deposits	$ 8	$ 9