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Debt, Financial Instruments and Fair Value Measurements - Additional Information (Detail)
€ in Millions
3 Months Ended
Mar. 31, 2018
USD ($)
Mar. 31, 2017
USD ($)
Dec. 31, 2017
USD ($)
May 31, 2017
EUR (€)
Dec. 31, 2016
USD ($)
Debt and Financial Instruments [Line Items]          
Maximum length of time hedge in cash flow hedge 15 months        
Senior notes | €       € 600  
Terminated fair value hedges $ 0 $ 0      
Gain (loss) recognized in income, fair value hedges 4,000,000 1,000,000      
Deferred, net after-tax losses on derivative instruments (13,000,000)        
Cash and equivalents 2,947,000,000 2,858,000,000 $ 3,394,000,000   $ 2,801,000,000
Other-than-temporary impairment charge related to marketable equity security   4,000,000      
Other Assets          
Debt and Financial Instruments [Line Items]          
Other equity investments without readily determinable fair values 41,000,000   43,000,000    
Fair Value, Inputs, Level 2          
Debt and Financial Instruments [Line Items]          
Money market funds, at carrying value 700,000,000   700,000,000    
Significant Unobservable Inputs (Level 3) | RECOTHROM and PREVELEAK          
Debt and Financial Instruments [Line Items]          
Change in fair value of contingent payment related to achievement of certain sales-based milestones 14,000,000        
Designated as Hedging Instrument          
Debt and Financial Instruments [Line Items]          
Derivative notional amount 0 $ 0      
Not Designated as Hedging Instrument          
Debt and Financial Instruments [Line Items]          
Derivative notional amount 845,000,000   885,000,000    
Net investment hedge          
Debt and Financial Instruments [Line Items]          
Accumulated pre-tax unrealized translation losses in AOCI related to euro-denominated senior notes 100,000,000        
Foreign exchange contract          
Debt and Financial Instruments [Line Items]          
Derivative notional amount 731,000,000   660,000,000    
Interest rate contract          
Debt and Financial Instruments [Line Items]          
Derivative notional amount 0   0    
Interest rate contract | Fair value hedges          
Debt and Financial Instruments [Line Items]          
Derivative notional amount 200,000,000   $ 200,000,000    
Greece, Spain, Portugal and Italy          
Debt and Financial Instruments [Line Items]          
Total accounts receivable from certain countries with liquidity issues $ 137,000,000