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Revenues - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 26, 2020
Sep. 28, 2019
Sep. 26, 2020
Sep. 28, 2019
Dec. 31, 2019
Revenue From Contract With Customer, Assets And Liabilities [Line Items]          
Deferred revenue balances $ 534   $ 534   $ 459
Revenue recognized that was included in contract liability 47 $ 41 204 $ 168  
Prepaid expenses and other current assets          
Revenue From Contract With Customer, Assets And Liabilities [Line Items]          
Contract assets recorded in prepaids and other current assets $ 13   $ 13   $ 8