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Debt - 6.50% Convertible Senior Notes (Details)
1 Months Ended 12 Months Ended
Jun. 30, 2020
USD ($)
$ / shares
Dec. 31, 2021
USD ($)
day
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Jan. 01, 2021
USD ($)
Debt Instrument [Line Items]          
Proceeds from issuance of long-term debt   $ 12,190,000,000 $ 11,780,000,000 $ 3,960,000,000  
Interest expense   $ 1,800,000,000 $ 1,227,000,000 $ 1,095,000,000  
Senior Notes 6.50% Due 2025 | Senior Notes          
Debt Instrument [Line Items]          
Fixed interest rate per annum 6.50%        
Aggregate principal issued $ 1,000,000,000        
Proceeds from issuance of long-term debt $ 970,000,000        
Long term debt, price, percentage of par value 100.00%        
Debt instrument, conversion ratio 0.0617284        
Conversion price | $ / shares $ 16.20        
Convertible debt, conversion terms, percentage of sales price exceeding conversion price 130.00%        
Threshold trading days | day   20      
Threshold consecutive trading days | day   30      
Redemption price percentage 100.00%        
Debt instrument, percent of holders can declare debt due and payable 25.00%        
Reduction of debt discount   $ 22,000,000      
Effective interest rate percentage   7.00% 20.00%    
Interest expense   $ 70,000,000      
Amortization of debt discount   5,000,000      
Interest expense   65,000,000      
Debt instrument, convertible, if-converted value in excess of principal   $ 114,000,000      
Senior Notes 6.50% Due 2025 | Senior Notes | Debt Conversion, Circumstance One          
Debt Instrument [Line Items]          
Convertible debt, conversion terms, percentage of sales price exceeding conversion price 130.00%        
Threshold trading days | day   20      
Threshold consecutive trading days | day   30      
Senior Notes 6.50% Due 2025 | Senior Notes | Debt Conversion, Circumstance Two          
Debt Instrument [Line Items]          
Threshold trading days | day   5      
Threshold consecutive trading days | day   10      
Convertible debt, conversion terms, measurement period trading price threshold percentage 98.00%        
Senior Notes 6.50% Due 2025 | Senior Notes | Cumulative Effect, Period of Adoption, Adjustment          
Debt Instrument [Line Items]          
Reduction of debt discount         $ (389,000,000)