XML 68 R57.htm IDEA: XBRL DOCUMENT v3.8.0.1
Fair value measurement (Details) - USD ($)
$ in Millions
Mar. 31, 2018
Dec. 31, 2017
Mar. 31, 2017
Dec. 31, 2016
Assets:        
Total available-for-sale investments $ 31,670 $ 41,318    
Fair Value, Measurements, Recurring [Member]        
Derivatives:        
Total assets 32,275 41,604    
Derivatives:        
Contingent consideration obligations in connection with business combinations 110 69    
Total liabilities 732 554    
Fair Value, Measurements, Recurring [Member] | Foreign currency contracts [Member]        
Derivatives:        
Foreign currency and cross-currency swap contracts 17 6    
Derivatives:        
Foreign currency and cross-currency swap contracts 259 204    
Fair Value, Measurements, Recurring [Member] | Cross-currency swap contracts [Member]        
Derivatives:        
Foreign currency and cross-currency swap contracts 433 270    
Derivatives:        
Foreign currency and cross-currency swap contracts 148 220    
Fair Value, Measurements, Recurring [Member] | Interest rate swap contracts [Member]        
Derivatives:        
Interest rate contracts   10    
Derivatives:        
Interest rate swap contracts 215 61    
Fair Value, Measurements, Recurring [Member] | U.S. Treasury securities [Member]        
Assets:        
Total available-for-sale investments 5,103 8,242    
Fair Value, Measurements, Recurring [Member] | Other government-related debt securities - U.S. [Member]        
Assets:        
Total available-for-sale investments 129 223    
Fair Value, Measurements, Recurring [Member] | Other government-related debt securities - Foreign and other [Member]        
Assets:        
Total available-for-sale investments 1,674 2,422    
Fair Value, Measurements, Recurring [Member] | Corporate debt securities - Financial [Member]        
Assets:        
Total available-for-sale investments 6,053 10,072    
Fair Value, Measurements, Recurring [Member] | Corporate debt securities - Industrial [Member]        
Assets:        
Total available-for-sale investments 5,565 9,670    
Fair Value, Measurements, Recurring [Member] | Corporate debt securities - Other [Member]        
Assets:        
Total available-for-sale investments 896 1,390    
Fair Value, Measurements, Recurring [Member] | Residential mortgage-backed securities [Member]        
Assets:        
Total available-for-sale investments 1,699 2,168    
Fair Value, Measurements, Recurring [Member] | Other mortgage- and asset-backed securities [Member]        
Assets:        
Total available-for-sale investments 1,267 2,297    
Fair Value, Measurements, Recurring [Member] | Money market mutual funds [Member]        
Assets:        
Total available-for-sale investments 9,234 3,245    
Fair Value, Measurements, Recurring [Member] | Other short-term interest-bearing securities [Member]        
Assets:        
Total available-for-sale investments 50 1,440    
Fair Value, Measurements, Recurring [Member] | Equity securities [Member]        
Assets:        
Total available-for-sale investments 155 149    
Fair Value, Measurements, Recurring [Member] | Quoted prices in active markets for identical assets (Level 1) [Member]        
Derivatives:        
Total assets 14,492 11,636    
Derivatives:        
Contingent consideration obligations in connection with business combinations 0 0    
Total liabilities 0 0    
Fair Value, Measurements, Recurring [Member] | Quoted prices in active markets for identical assets (Level 1) [Member] | Foreign currency contracts [Member]        
Derivatives:        
Foreign currency and cross-currency swap contracts 0 0    
Derivatives:        
Foreign currency and cross-currency swap contracts 0 0    
Fair Value, Measurements, Recurring [Member] | Quoted prices in active markets for identical assets (Level 1) [Member] | Cross-currency swap contracts [Member]        
Derivatives:        
Foreign currency and cross-currency swap contracts 0 0    
Derivatives:        
Foreign currency and cross-currency swap contracts 0 0    
Fair Value, Measurements, Recurring [Member] | Quoted prices in active markets for identical assets (Level 1) [Member] | Interest rate swap contracts [Member]        
Derivatives:        
Interest rate contracts   0    
Derivatives:        
Interest rate swap contracts 0 0    
Fair Value, Measurements, Recurring [Member] | Quoted prices in active markets for identical assets (Level 1) [Member] | U.S. Treasury securities [Member]        
Assets:        
Total available-for-sale investments 5,103 8,242    
Fair Value, Measurements, Recurring [Member] | Quoted prices in active markets for identical assets (Level 1) [Member] | Other government-related debt securities - U.S. [Member]        
Assets:        
Total available-for-sale investments 0 0    
Fair Value, Measurements, Recurring [Member] | Quoted prices in active markets for identical assets (Level 1) [Member] | Other government-related debt securities - Foreign and other [Member]        
Assets:        
Total available-for-sale investments 0 0    
Fair Value, Measurements, Recurring [Member] | Quoted prices in active markets for identical assets (Level 1) [Member] | Corporate debt securities - Financial [Member]        
Assets:        
Total available-for-sale investments 0 0    
Fair Value, Measurements, Recurring [Member] | Quoted prices in active markets for identical assets (Level 1) [Member] | Corporate debt securities - Industrial [Member]        
Assets:        
Total available-for-sale investments 0 0    
Fair Value, Measurements, Recurring [Member] | Quoted prices in active markets for identical assets (Level 1) [Member] | Corporate debt securities - Other [Member]        
Assets:        
Total available-for-sale investments 0 0    
Fair Value, Measurements, Recurring [Member] | Quoted prices in active markets for identical assets (Level 1) [Member] | Residential mortgage-backed securities [Member]        
Assets:        
Total available-for-sale investments 0 0    
Fair Value, Measurements, Recurring [Member] | Quoted prices in active markets for identical assets (Level 1) [Member] | Other mortgage- and asset-backed securities [Member]        
Assets:        
Total available-for-sale investments 0 0    
Fair Value, Measurements, Recurring [Member] | Quoted prices in active markets for identical assets (Level 1) [Member] | Money market mutual funds [Member]        
Assets:        
Total available-for-sale investments 9,234 3,245    
Fair Value, Measurements, Recurring [Member] | Quoted prices in active markets for identical assets (Level 1) [Member] | Other short-term interest-bearing securities [Member]        
Assets:        
Total available-for-sale investments 0 0    
Fair Value, Measurements, Recurring [Member] | Quoted prices in active markets for identical assets (Level 1) [Member] | Equity securities [Member]        
Assets:        
Total available-for-sale investments 155 149    
Fair Value, Measurements, Recurring [Member] | Significant other observable inputs (Level 2) [Member]        
Derivatives:        
Total assets 17,783 29,968    
Derivatives:        
Contingent consideration obligations in connection with business combinations 0 0    
Total liabilities 622 485    
Fair Value, Measurements, Recurring [Member] | Significant other observable inputs (Level 2) [Member] | Foreign currency contracts [Member]        
Derivatives:        
Foreign currency and cross-currency swap contracts 17 6    
Derivatives:        
Foreign currency and cross-currency swap contracts 259 204    
Fair Value, Measurements, Recurring [Member] | Significant other observable inputs (Level 2) [Member] | Cross-currency swap contracts [Member]        
Derivatives:        
Foreign currency and cross-currency swap contracts 433 270    
Derivatives:        
Foreign currency and cross-currency swap contracts 148 220    
Fair Value, Measurements, Recurring [Member] | Significant other observable inputs (Level 2) [Member] | Interest rate swap contracts [Member]        
Derivatives:        
Interest rate contracts   10    
Derivatives:        
Interest rate swap contracts 215 61    
Fair Value, Measurements, Recurring [Member] | Significant other observable inputs (Level 2) [Member] | U.S. Treasury securities [Member]        
Assets:        
Total available-for-sale investments 0 0    
Fair Value, Measurements, Recurring [Member] | Significant other observable inputs (Level 2) [Member] | Other government-related debt securities - U.S. [Member]        
Assets:        
Total available-for-sale investments 129 223    
Fair Value, Measurements, Recurring [Member] | Significant other observable inputs (Level 2) [Member] | Other government-related debt securities - Foreign and other [Member]        
Assets:        
Total available-for-sale investments 1,674 2,422    
Fair Value, Measurements, Recurring [Member] | Significant other observable inputs (Level 2) [Member] | Corporate debt securities - Financial [Member]        
Assets:        
Total available-for-sale investments 6,053 10,072    
Fair Value, Measurements, Recurring [Member] | Significant other observable inputs (Level 2) [Member] | Corporate debt securities - Industrial [Member]        
Assets:        
Total available-for-sale investments 5,565 9,670    
Fair Value, Measurements, Recurring [Member] | Significant other observable inputs (Level 2) [Member] | Corporate debt securities - Other [Member]        
Assets:        
Total available-for-sale investments 896 1,390    
Fair Value, Measurements, Recurring [Member] | Significant other observable inputs (Level 2) [Member] | Residential mortgage-backed securities [Member]        
Assets:        
Total available-for-sale investments 1,699 2,168    
Fair Value, Measurements, Recurring [Member] | Significant other observable inputs (Level 2) [Member] | Other mortgage- and asset-backed securities [Member]        
Assets:        
Total available-for-sale investments 1,267 2,297    
Fair Value, Measurements, Recurring [Member] | Significant other observable inputs (Level 2) [Member] | Money market mutual funds [Member]        
Assets:        
Total available-for-sale investments 0 0    
Fair Value, Measurements, Recurring [Member] | Significant other observable inputs (Level 2) [Member] | Other short-term interest-bearing securities [Member]        
Assets:        
Total available-for-sale investments 50 1,440    
Fair Value, Measurements, Recurring [Member] | Significant other observable inputs (Level 2) [Member] | Equity securities [Member]        
Assets:        
Total available-for-sale investments 0 0    
Fair Value, Measurements, Recurring [Member] | Significant unobservable inputs (Level 3) [Member]        
Derivatives:        
Total assets 0 0    
Derivatives:        
Contingent consideration obligations in connection with business combinations 110 69 $ 184 $ 179
Total liabilities 110 69    
Fair Value, Measurements, Recurring [Member] | Significant unobservable inputs (Level 3) [Member] | Foreign currency contracts [Member]        
Derivatives:        
Foreign currency and cross-currency swap contracts 0 0    
Derivatives:        
Foreign currency and cross-currency swap contracts 0 0    
Fair Value, Measurements, Recurring [Member] | Significant unobservable inputs (Level 3) [Member] | Cross-currency swap contracts [Member]        
Derivatives:        
Foreign currency and cross-currency swap contracts 0 0    
Derivatives:        
Foreign currency and cross-currency swap contracts 0 0    
Fair Value, Measurements, Recurring [Member] | Significant unobservable inputs (Level 3) [Member] | Interest rate swap contracts [Member]        
Derivatives:        
Interest rate contracts   0    
Derivatives:        
Interest rate swap contracts 0 0    
Fair Value, Measurements, Recurring [Member] | Significant unobservable inputs (Level 3) [Member] | U.S. Treasury securities [Member]        
Assets:        
Total available-for-sale investments 0 0    
Fair Value, Measurements, Recurring [Member] | Significant unobservable inputs (Level 3) [Member] | Other government-related debt securities - U.S. [Member]        
Assets:        
Total available-for-sale investments 0 0    
Fair Value, Measurements, Recurring [Member] | Significant unobservable inputs (Level 3) [Member] | Other government-related debt securities - Foreign and other [Member]        
Assets:        
Total available-for-sale investments 0 0    
Fair Value, Measurements, Recurring [Member] | Significant unobservable inputs (Level 3) [Member] | Corporate debt securities - Financial [Member]        
Assets:        
Total available-for-sale investments 0 0    
Fair Value, Measurements, Recurring [Member] | Significant unobservable inputs (Level 3) [Member] | Corporate debt securities - Industrial [Member]        
Assets:        
Total available-for-sale investments 0 0    
Fair Value, Measurements, Recurring [Member] | Significant unobservable inputs (Level 3) [Member] | Corporate debt securities - Other [Member]        
Assets:        
Total available-for-sale investments 0 0    
Fair Value, Measurements, Recurring [Member] | Significant unobservable inputs (Level 3) [Member] | Residential mortgage-backed securities [Member]        
Assets:        
Total available-for-sale investments 0 0    
Fair Value, Measurements, Recurring [Member] | Significant unobservable inputs (Level 3) [Member] | Other mortgage- and asset-backed securities [Member]        
Assets:        
Total available-for-sale investments 0 0    
Fair Value, Measurements, Recurring [Member] | Significant unobservable inputs (Level 3) [Member] | Money market mutual funds [Member]        
Assets:        
Total available-for-sale investments 0 0    
Fair Value, Measurements, Recurring [Member] | Significant unobservable inputs (Level 3) [Member] | Other short-term interest-bearing securities [Member]        
Assets:        
Total available-for-sale investments 0 0    
Fair Value, Measurements, Recurring [Member] | Significant unobservable inputs (Level 3) [Member] | Equity securities [Member]        
Assets:        
Total available-for-sale investments $ 0 $ 0