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Debt - Repurchase Agreement (Details) - USD ($)
$ in Millions
12 Months Ended
Jan. 01, 2023
Dec. 31, 2022
Dec. 31, 2021
Debt Instrument [Line Items]      
Equipment installment plan receivables   $ 1,211 $ 1,085
Repurchase Agreement      
Debt Instrument [Line Items]      
Maximum borrowing capacity   200  
Amount borrowed during the period   110  
Amount repaid during the period   50  
Amounts borrowed and outstanding   60  
Amount available for use   140  
Repurchase Agreement | Assets pledged      
Debt Instrument [Line Items]      
Equipment installment plan receivables   $ 524  
SOFR Rate | Repurchase Agreement      
Debt Instrument [Line Items]      
Contractual spread   1.25%  
Lender's cost of funds | Repurchase Agreement | Subsequent event      
Debt Instrument [Line Items]      
Contractual spread 1.35%