Annual report pursuant to Section 13 and 15(d)

Revenue (Details)

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Revenue (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                      
Net revenue $ 3,467 $ 2,504 $ 2,514 $ 2,501 $ 3,555 $ 2,569 $ 2,556 $ 2,602 $ 10,986 $ 11,282 $ 8,771
Cost of Goods and Services Sold                 7,148 7,248 5,598
Operating                 768 881 601
Operating Expenses                 9,659 9,770 7,462
Selling, General and Administrative, Including Transaction Related Costs and Stock-Based Compensation                 1,128 1,200 744
Income Tax Expense (Benefit)                 262 334 139
Net income 225 $ 188 $ 218 $ 186 291 $ 181 $ 244 $ 212 817 928 947
Customer returns                 2,138 2,213 $ 1,811
Prepaid Expense         116         116  
Allowance for sales returns $ 238       $ 242       $ 238 242  
Calculated under Revenue Guidance in Effect before Topic 606 [Member]                      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                      
Net revenue                   11,143  
Cost of Goods and Services Sold                   7,238  
Operating Expenses                   879  
Selling, General and Administrative, Including Transaction Related Costs and Stock-Based Compensation                   1,082  
Income Tax Expense (Benefit)                   332  
Net income                   921  
Difference between Revenue Guidance in Effect before and after Topic 606 [Member]                      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                      
Net revenue                   139  
Cost of Goods and Services Sold                   10  
Operating Expenses                   2  
Selling, General and Administrative, Including Transaction Related Costs and Stock-Based Compensation                   118  
Income Tax Expense (Benefit)                   2  
Net income                   $ 7