Revenues - Remaining Performance Obligations (Details) $ in Billions	Sep. 28, 2019 USD ($)
Remaining Performance Obligation, Expected Timing of Satisfaction
Remaining performance obligations	$ 8.8
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-02
Remaining Performance Obligation, Expected Timing of Satisfaction
Percentage of remaining performance obligation expected to be recognized in period	64.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-12-31
Remaining Performance Obligation, Expected Timing of Satisfaction
Percentage of remaining performance obligation expected to be recognized in period	29.00%