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Supplemental Balance Sheet Details (Tables)
 3 Months Ended
Apr. 04, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Schedule of Accounts Receivable
Accounts Receivable

In millionsApril 4,
2021		January 3,
2021
Trade accounts receivable, gross$520 $491 
Allowance for credit losses(3)(4)
Total accounts receivable, net$517 $487 
Summary of Inventory
Inventory

In millionsApril 4,
2021		January 3,
2021
Raw materials$89 $106 
Work in process252 244 
Finished goods23 22 
Total inventory$364 $372 
Summary of Accrued Liabilities
Accrued Liabilities

In millionsApril 4,
2021		January 3,
2021
Contract liabilities, current portion$188 $186 
Accrued compensation expenses152 153 
Accrued taxes payable116 68 
Operating lease liabilities, current portion53 51 
Other, including warranties (a) 93 83 
Total accrued liabilities$602 $541 
(a) Changes in the reserve for product warranties were as follows:

In millionsQ1 2021Q1 2020
Balance at beginning of period$13 $14 
Additions charged to cost of product revenue8 3 
Repairs and replacements(6)(5)
Balance at end of period$15 $12 
Summary of Changes in Reserve for Product Warranties Changes in the reserve for product warranties were as follows:
In millionsQ1 2021Q1 2020
Balance at beginning of period$13 $14 
Additions charged to cost of product revenue8 3 
Repairs and replacements(6)(5)
Balance at end of period$15 $12