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Stock Ownership Plans (Tables)
 12 Months Ended
Dec. 31, 2015
Stock Ownership Plans [Abstract]  
Schedule of Share-based Compensation, Employee Stock Purchase Plan, Activity [Table Text Block]
Information related to shares issued or to be issued in connection with the employee stock purchase plan based on employee contributions and the range of purchase prices is as follows:
 (shares in thousands)
 
2015
 
2014
 
2013
Shares issued or to be issued
 
2,529

 
2,618

 
3,833

Range of purchase prices
 
$11.24 - $15.13

 
$10.12 - $11.04

 
$5.01 - $7.96
Schedule of Unrecognized Compensation Cost, Nonvested Awards [Table Text Block]
We expect to recognize the following future expense for awards outstanding as of December 31, 2015:
 
 
 Unrecognized
 Compensation  Cost
(in millions)(1)
 
Weighted Average
Remaining
Vesting Period
(in years)
Stock options
 
$
25

 
 
Non-vested stock awards
 
135

 
 
 
 
$
160

 
1.3
(1)
Amounts presented represent compensation cost, net of estimated forfeitures.
Market-based awards, valuation assumptions [Table Text Block]
We determined the fair value of the 2015 market-based DSU awards to be approximately $7 million and the fair values of the 2014 and the 2013 market-based awards to be approximately $6 million and $8 million, respectively. We determined these fair values based on Monte Carlo simulations as of the date of grant, utilizing the following assumptions:
 
 
2015
 
2014
 
2013
 
 
Awards
 
Awards
 
Awards
Stock price on date of grant
 
$
16.31

 
$
13.08

 
$
7.39

Measurement period (in years)
 
3.0

 
3.0

 
3.0

Risk-free rate
 
0.98
%
 
0.66
%
 
0.34
%
Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block]
Information related to non-vested stock awards during 2015, 2014 and 2013 is as follows:
 
 
Non-Vested
Stock Award Units
(in thousands)
 
Weighted Average
Grant- Date
Fair Value
Balance as of December 31, 2012
 
36,593

 
$
7

Granted
 
13,913

 
8

Vested (1)
 
(10,307
)
 
8

Forfeited
 
(2,860
)
 
7

Balance as of December 31, 2013
 
37,339

 
$
7

Granted
 
7,072

 
13

Vested (1)
 
(11,205
)
 
7

Forfeited
 
(2,671
)
 
8

Balance as of December 31, 2014
 
30,535

 
$
9

Granted
 
6,606

 
16

Vested (1)
 
(11,607
)
 
8

Forfeited
 
(1,770
)
 
10

Balance as of December 31, 2015
 
23,764

 
$
11

(1)
The number of restricted stock units vested includes shares withheld on behalf of employees to satisfy statutory tax withholding
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]
The following presents the impact of stock-based compensation on our consolidated statements of operations for the years ended December 31, 2015, 2014 and 2013:
 
 
Year Ended December 31,
(in millions, except per share data)
 
2015
 
2014
 
2013
Cost of products sold
 
$
7

 
$
6

 
$
8

Selling, general and administrative expenses
 
81

 
79

 
79

Research and development expenses
 
19

 
18

 
18

 
 
107

 
103

 
105

Less: income tax benefit
 
(28
)
 
(28
)
 
(29
)
 
 
$
79

 
$
75

 
$
76

 
 
 
 
 
 
 
Net impact per common share - basic
 
$
0.06

 
$
0.06

 
$
0.06

Net impact per common share - assuming dilution
 
$
0.06

 
$
0.06

 
$
0.06
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
We use the Black-Scholes option-pricing model to calculate the grant-date fair value of stock options granted to employees under our stock incentive plans. We calculated the fair value for options granted during 2015, 2014 and 2013 using the following estimated weighted-average assumptions:
 
 
Year Ended December 31,
 
 
2015
 
2014
 
2013
Options granted (in thousands)
 
4,441

 
4,943

 
1,992

Weighted-average exercise price
 
$
16.49

 
$
13.02

 
$
7.44

Weighted-average grant-date fair value
 
$
5.54

 
$
5.07

 
$
2.84

Black-Scholes Assumptions
 
 
 
 
 
 
Expected volatility
 
31
%
 
37
%
 
36
%
Expected term (in years, weighted)
 
6.0

 
6.0

 
5.9

Risk-free interest rate
 
1.49% - 1.92%

 
1.69% - 2.09%

 
0.89% - 1.72%
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]
Information related to stock options for 2015, 2014 and 2013 under stock incentive plans is as follows:
 
 
Stock Options
(in thousands)
 
Weighted
Average
Exercise Price
 
Weighted Average
Remaining
Contractual Life 
(in years)
 
Aggregate
Intrinsic
Value
(in millions)
Outstanding as of December 31, 2012
 
54,881

 
$
12

 
 
 
 
Granted
 
1,992

 
7

 
 
 
 
Exercised
 
(7,221
)
 
8

 
 
 
 
Cancelled/forfeited
 
(4,760
)
 
21

 
 
 
 
Outstanding as of December 31, 2013
 
44,892

 
$
12

 
 
 
 
Granted
 
4,943

 
13

 
 
 
 
Exercised
 
(4,418
)
 
8

 
 
 
 
Cancelled/forfeited
 
(5,909
)
 
17

 
 
 
 
Outstanding as of December 31, 2014
 
39,508

 
$
11

 
 
 
 
Granted
 
4,441

 
16

 
 
 
 
Exercised
 
(9,040
)
 
9

 
 
 
 
Cancelled/forfeited
 
(3,820
)
 
25

 
 
 
 
Outstanding as of December 31, 2015
 
31,089

 
$
11

 
5.3
 
$
240

Exercisable as of December 31, 2015
 
22,104

 
$
10

 
4.0
 
$
196

Expected to vest as of December 31, 2015
 
8,299

 
13

 
8.4
 
42

Total vested and expected to vest as of December 31, 2015
 
30,403

 
$
11

 
5.2
 
$
238