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Goodwill and Other Intangible Assets Goodwill and Other Intangible Assets (Tables)
 12 Months Ended
Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]  
Schedule of Intangible Assets and Goodwill [Table Text Block]
 
 
As of December 31, 2017
 
As of December 31, 2016
 
 
Gross Carrying
 
Accumulated
Amortization/
 
Gross Carrying
 
Accumulated
Amortization/
(in millions)
 
Amount
 
Write-offs
 
Amount
 
Write-offs
Amortizable intangible assets
 
 
 
 
 
 
 
 
Technology-related
 
$
9,386

 
$
(4,880
)
 
$
9,123

 
$
(4,468
)
Patents
 
517

 
(379
)
 
529

 
(374
)
Other intangible assets
 
1,633

 
(838
)
 
1,583

 
(722
)
 
 
$
11,536

 
$
(6,097
)
 
$
11,235

 
$
(5,564
)
Unamortizable intangible assets
 
 
 
 
 
 
 
 
Goodwill
 
$
16,898

 
$
(9,900
)
 
$
16,578

 
$
(9,900
)
IPR&D
 
278

 
—

 
92

 
—

Technology-related
 
120

 
—

 
120

 
—

 
 
$
17,295

 
$
(9,900
)
 
$
16,790

 
$
(9,900
)
Schedule of Goodwill [Table Text Block]
The following represents our goodwill balance by global reportable segment:
(in millions)
 
Cardiovascular
 
Rhythm Management
 
MedSurg
 
Total
Balance as of December 31, 2015
 
$
3,451

 
$
292

 
$
2,730

 
$
6,473

Impact of foreign currency fluctuations and other changes in carry amount
 
—

 
(2
)
 
(1
)
 
(3
)
Goodwill acquired
 
62

 
—

 
146

 
208

Balance as of December 31, 2016
 
$
3,513

 
$
290

 
$
2,875

 
$
6,678

Impact of foreign currency fluctuations and other changes in carry amount
 
9

 
1

 
2

 
12

Goodwill acquired
 
182

 
126

 
—

 
308

Balance as of December 31, 2017
 
$
3,704

 
$
417

 
$
2,877

 
$
6,998
Description of unobservable inputs used in Level 3 fair value measurements [Table Text Block]
The recurring Level 3 fair value measurements of our contingent consideration liabilities include the following significant unobservable inputs:
Contingent Consideration Liabilities
Fair Value as of December 31, 2017
Valuation Technique
Unobservable Input
Range
R&D and Commercialization-based Milestone
$125 million
Discounted Cash Flow
Discount Rate
2% - 3%
Probability of Payment
17% - 100%
Projected Year of Payment
2018 - 2022
Revenue-based Payments
$44 million
Discounted Cash Flow
Discount Rate
11% - 15%
Projected Year of Payment
2018 - 2026
Schedule of Expected Amortization Expense [Table Text Block]
E