v3.20.4
Other (Income)/Deductions - Net - Schedule of Additional Information About Intangible Assets Impaired (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total [1] $ 1,840    
Intangible asset impairments 1,691 $ 2,800 $ 3,100
IPR&D [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Intangible assets––IPR&D [1],[2] 1,100    
Intangible asset impairments [2] 900    
Level 1 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total [1] 0    
Level 1 [Member] | IPR&D [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Intangible assets––IPR&D [1],[2] 0    
Level 2 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total [1] 0    
Level 2 [Member] | IPR&D [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Intangible assets––IPR&D [1],[2] 0    
Level 3 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total [1] 1,840    
Level 3 [Member] | IPR&D [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Intangible assets––IPR&D [1],[2] 1,100    
Developed Technology Rights [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Intangible assets––Developed technology rights [1],[2] 740    
Intangible asset impairments [2] 791    
Developed Technology Rights [Member] | Level 1 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Intangible assets––Developed technology rights [1],[2] 0    
Developed Technology Rights [Member] | Level 2 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Intangible assets––Developed technology rights [1],[2] 0    
Developed Technology Rights [Member] | Level 3 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Intangible assets––Developed technology rights [1],[2] $ 740    
[1] The fair value amount is presented as of the date of impairment, as these assets are not measured at fair value on a recurring basis. See also Note 1E.
[2] Reflects intangible assets written down to fair value in 2020. Fair value was determined using the income approach, specifically the multi-period excess earnings method, also known as the discounted cash flow method. We started with a forecast of all the expected net cash flows for the asset and then applied an asset-specific discount rate to arrive at a net present value amount. Some of the more significant estimates and assumptions inherent in this approach include: the amount and timing of the projected net cash flows, which includes the expected impact of competitive, legal and/or regulatory forces on the product; the discount rate, which seeks to reflect the various risks inherent in the projected cash flows; and the tax rate, which seeks to incorporate the geographic diversity of the projected cash flows.