Quarterly report pursuant to Section 13 or 15(d)

Financial Instruments (Cash, Cash Equivalents, and Marketable Securities Fair Value Measurements) (Details)

v3.10.0.1
Financial Instruments (Cash, Cash Equivalents, and Marketable Securities Fair Value Measurements) (Details) - USD ($)
$ in Millions
Jun. 30, 2018
Dec. 30, 2017
Schedule of Investments [Line Items]    
Total Fair Value $ 983 $ 1,185
Cash and Cash Equivalents 948 1,185
Short-Term Marketable Securities [1] 35 0
Level 1    
Schedule of Investments [Line Items]    
Total Fair Value 95 395
Cash and Cash Equivalents 95 395
Short-Term Marketable Securities 0  
Level 2    
Schedule of Investments [Line Items]    
Total Fair Value 842 682
Cash and Cash Equivalents 807 682
Short-Term Marketable Securities 35  
Cash    
Schedule of Investments [Line Items]    
Total Fair Value 46 108
Cash and Cash Equivalents 46 108
Short-Term Marketable Securities 0  
Government money market funds | Level 1    
Schedule of Investments [Line Items]    
Total Fair Value 95 395
Cash and Cash Equivalents 95 395
Short-Term Marketable Securities 0  
Commercial paper | Level 2    
Schedule of Investments [Line Items]    
Total Fair Value 842 682
Cash and Cash Equivalents 807 $ 682
Short-Term Marketable Securities $ 35  
[1] Prior year amounts adjusted to reflect the retrospective application of ASU 2014-09, Revenue from Contracts with Customers. Refer to Note 1.