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Revenues (Remaining Performance Obligations Narrative) (Details)
$ in Billions
Jul. 03, 2020
USD ($)
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]  
Remaining performance obligations, which are expected to be recognized as revenue $ 15.3
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-07-04  
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]  
Remaining performance obligations, which are expected to be recognized as revenue $ 5.5
Remaining performance obligations, which are expected to be recognized as revenue, period 6 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-02  
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]  
Remaining performance obligations, which are expected to be recognized as revenue $ 3.7
Remaining performance obligations, which are expected to be recognized as revenue, period 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01  
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]  
Remaining performance obligations, which are expected to be recognized as revenue $ 6.1
Remaining performance obligations, which are expected to be recognized as revenue, period