v3.19.3.a.u2
Non-Controlling Interest (Details)
$ / shares in Units, shares in Millions, $ in Millions
12 Months Ended
Jul. 02, 2019
USD ($)
installment
$ / shares
shares
Dec. 31, 2019
USD ($)
shares
Dec. 31, 2018
Freight Holding      
Noncontrolling Interest [Line Items]      
Diluted ownership percentage in non-controlling interest   80.00% 80.00%
Ownership percentage in non-controlling interest   89.00% 89.00%
Shares reserved and available for grant and issuance (in shares) | shares   99.8  
Apparate | Volatility | Level 3      
Noncontrolling Interest [Line Items]      
Unobservable measurement input   0.42  
Apparate | Time to Liquidity | Level 3      
Noncontrolling Interest [Line Items]      
Unobservable measurement input   4 years 6 months  
Apparate | Discount for Lack of Marketability | Level 3      
Noncontrolling Interest [Line Items]      
Unobservable measurement input   0.16  
ATG Investment | Apparate      
Noncontrolling Interest [Line Items]      
Initial ownership interest 86.20%    
ATG Investment | Preferred Class A      
Noncontrolling Interest [Line Items]      
Initial ownership interest 13.80%    
ATG Investment | Apparate      
Noncontrolling Interest [Line Items]      
Proceeds from issuance of common stock $ 1,000    
Number of semi-annual installments | installment 6    
Semi-annual installment received   $ 50  
ATG Investment | Apparate | ATG and Other Technology Programs collaboration revenue      
Noncontrolling Interest [Line Items]      
Revenue recognized from redeemable non-controlling interest   $ 42  
ATG Investment | Apparate | Toyota      
Noncontrolling Interest [Line Items]      
Proceeds from issuance of common stock $ 400    
ATG Investment | Apparate | Softbank      
Noncontrolling Interest [Line Items]      
Proceeds from issuance of common stock 333    
ATG Investment | Apparate | DENSO      
Noncontrolling Interest [Line Items]      
Proceeds from issuance of common stock $ 267    
ATG Investment | Apparate | Preferred Class A      
Noncontrolling Interest [Line Items]      
Stock issued during period (in shares) | shares 1.0    
Preferred stock units issued (in dollars per share) | $ / shares $ 1,000    
Conversion ratio 1    
Annual dividend rate 4.50%    
ATG Investment | Toyota      
Noncontrolling Interest [Line Items]      
Aggregate installment amount $ 300