v3.22.0.1
Commitments and Contingencies - Narrative (Details)
$ in Millions
 12 Months Ended
Jan. 03, 2022
USD ($)
numberOfDeliver
Dec. 31, 2021
USD ($)
Loss Contingencies [Line Items]    
Purchase commitment, due next year   $ 4,700
Purchase commitment, due within two and three years   5,600
Purchase commitment, due within four and five years   2,100
Purchase commitment, due thereafter   1,600
Lease and service credit commitment, due next year   350
Lease and service credit commitment, due within two and three years   611
Lease and service credit commitment, due within four and five years   591
Lease and service credit commitment, due thereafter   4,700
Maximum remaining commitment   85
Merger commitment, due next year   11
Merger commitment, due within two and three years   $ 12
Subsequent Event    
Loss Contingencies [Line Items]    
Number of small cell contracts deliver next five year | numberOfDeliver 35,000  
Minimum commitment for small cells $ 1,800  
Minimum    
Loss Contingencies [Line Items]    
Commitment term   15 years
Maximum    
Loss Contingencies [Line Items]    
Commitment term   30 years