v3.8.0.1
CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIT) - USD ($)
shares in Millions, $ in Millions
Total
Common stock [Member]
Additional paid-in capital [Member]
Accumulated other comprehensive income (loss) [Member]
Accumulated deficit [Member]
Verily Life Sciences [Member]
Common stock [Member]
Verily Life Sciences [Member]
Additional paid-in capital [Member]
Nintamed [Member]
Common stock [Member]
Nintamed [Member]
Additional paid-in capital [Member]
Balance at December 31, 2016 at Dec. 31, 2014 $ 140.2 $ 0.1 $ 638.0 $ (0.1) $ (497.8)        
Balance at December 31, 2016, shares at Dec. 31, 2014   77.3              
Issuance of common stock under equity incentive plans, shares   3.9              
Issuance of common stock under equity incentive plans 15.3   15.3            
Issuance of common stock for Employee Stock Purchase Plan, shares   0.1              
Issuance of common stock for Employee Stock Purchase Plan 3.8   3.8            
Issuance of common stock related to Verily Collaboration Agreement, shares           0.4      
Issuance of common stock related to Verily Collaboration Agreement 36.5           $ 36.5    
Share-based compensation for employee stock option and award grants 83.2   83.2            
Net loss (57.6)       (57.6)        
Other comprehensive loss (0.2)                
Other comprehensive loss (0.2)                
Balance at December 31, 2017 at Dec. 31, 2015 221.2 $ 0.1 776.8 (0.3) (555.4)        
Balance, shares at Dec. 31, 2015   81.7              
Issuance of common stock under equity incentive plans, shares   2.7              
Issuance of common stock under equity incentive plans 4.4   4.4            
Issuance of common stock for Employee Stock Purchase Plan, shares   0.1              
Issuance of common stock for Employee Stock Purchase Plan 6.0   6.0            
Issuance of common stock in connection with acquisitions, shares               0.1  
Issuance of common stock in connection with acquisition 7.2               $ 7.2
Share-based compensation for employee stock option and award grants 111.3   111.3            
Net loss (65.6)                
Other comprehensive loss (0.7)                
Other comprehensive loss (0.7)                
Balance at December 31, 2017 at Dec. 31, 2016 283.8 $ 0.1 905.7 (1.0) (621.0)        
Balance, shares at Dec. 31, 2016   84.6              
Issuance of common stock under equity incentive plans, shares   2.3              
Issuance of common stock under equity incentive plans 2.7   2.7            
Issuance of common stock for Employee Stock Purchase Plan, shares   0.1              
Issuance of common stock for Employee Stock Purchase Plan 7.4   7.4            
Share-based compensation for employee stock option and award grants 106.7   106.7            
Equity component of convertible note issuance, net of issuance costs 70.6   70.6            
Net loss (50.2)                
Other comprehensive loss (1.4)     (1.6)          
Other comprehensive loss (1.6)                
Balance at December 31, 2017 at Dec. 31, 2017 $ 419.4 $ 0.1 1,093.7 $ (2.6) (671.8)        
Balance, shares at Dec. 31, 2017   87.0              
Adoption of ASU 2016-09 | Accounting Standards Update 2016-09 [Member]     $ 0.6   $ (0.6)