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Component: (Network and Table)
Network
2346301 - Disclosure - Share-based Compensation (Tables)
(http://www.alxn.com/role/ShareBasedCompensationTables)
Table(Implied)
Slicers (applies to each fact value in each table cell)
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]Period [Axis]
2016-01-01 - 2016-12-31
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
 
Schedule of Share-Based Compensation
The following table summarizes the share-based compensation expense in the consolidated statements of operations: 
 
Year Ended December 31,
 
2016
 
2015
 
2014
Cost of sales
$
11

 
$
7

 
$
4

Research and development
57

 
64

 
36

Selling, general and administrative
124

 
156

 
74

Total share-based compensation expense
192

 
227

 
114

Income tax effect
(70
)
 
(84
)
 
(42
)
Total share-based compensation expense, net of tax
$
122

 
$
143

 
$
72

 
 
Schedule of Share-based Compensation, Stock Options, Activity
A summary of the status of our stock option plans at December 31, 2016, and changes during the year then ended is presented in the table and narrative below: 
 
Number of
shares
 
Weighted
Average  Exercise
Price
 
Weighted
Average
Remaining
Contractual
Term (in years)
 
Aggregate  Intrinsic
Value
Outstanding at December 31, 2015
6

 
$
110.15

 
 
 
 
Granted
2

 
139.71

 
 
 
 
Exercised
(1
)
 
55.36

 
 
 
 
Forfeited and canceled
(1
)
 
157.80

 
 
 
 
Outstanding at December 31, 2016
6

 
$
116.65

 
6.02
 
$
177

Vested and unvested expected to vest at December 31, 2016
6

 
$
116.08

 
5.97
 
$
177

Exercisable at December 31, 2016
4

 
$
97.02

 
4.59
 
$
175

 
 
Schedule of Share-based Compensation Valuation Assumptions
The fair value of options at the date of grant was estimated using the Black-Scholes model with the following ranges of weighted average assumptions: 
 
December 31,
 
December 31,
 
December 31,
 
2016
 
2015
 
2014
Expected life in years
3.82 - 6.29
 
3.57 - 9.00
 
3.64 - 5.30
Interest rate
0.87% - 1.66%
 
0.84% - 2.17%
 
0.97% - 1.74%
Volatility
33.45% - 37.61%
 
33.35% - 38.13%
 
32.15% - 34.87%
Dividend yield
 
 
 
 
Schedule of Share-based Compensation, Restricted Stock Activity
A summary of the status of our nonvested Restricted Stock and changes during the period then ended is as follows: 
 
Number of Shares
 
Weighted Average Grant Date Fair Value
Nonvested Restricted Stock at December 31, 2015
2

 
$
167.21

Shares granted
2

 
133.35

Shares forfeited

 
165.23

Shares vested
(1
)
 
155.03

Nonvested Restricted Stock at December 31, 2016
3

 
$
149.48