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Commitment and Contingencies - Narratives (Details) - USD ($)
$ in Millions
1 Months Ended 6 Months Ended 12 Months Ended
Apr. 30, 2018
Dec. 31, 2016
Jan. 27, 2018
Jan. 26, 2019
Jul. 29, 2017
Jul. 30, 2016
Oct. 29, 2016
Loss Contingencies [Line Items]              
Loss contingency, estimated loss             $ 13.0
Loss contingency accrual, payments   $ 0.1          
Guarantor Obligations, Maximum Exposure, Undiscounted     $ 21.9 $ 23.2      
Letters of credit outstanding amount     48.6 48.6      
Standby Letters of Credit              
Loss Contingencies [Line Items]              
Letters of credit outstanding amount       48.6      
Facility              
Loss Contingencies [Line Items]              
Operating lease rental     15.0 31.5 $ 26.0 $ 23.0  
Machinery              
Loss Contingencies [Line Items]              
Operating lease rental     14.4 35.4 32.5 $ 26.8  
Goodman Networks, Inc. Wireline Operations              
Loss Contingencies [Line Items]              
Escrow deposit       0.3      
Funds released from escrow         2.5    
Indemnification Portion Subject to Certain Conditions, Not Less Than Twelve Months | Goodman Networks, Inc. Wireline Operations              
Loss Contingencies [Line Items]              
Escrow deposit       22.5      
Indemnification Portion Subject to Seller Satisfaction of Certain Liabilities | Goodman Networks, Inc. Wireline Operations              
Loss Contingencies [Line Items]              
Escrow deposit         $ 10.0    
Proceeds From indemnification Claims $ 1.6            
Funds released from escrow $ 9.7            
Performance Guarantee and Surety Bond [Member]              
Loss Contingencies [Line Items]              
Guarantor obligations, carrying value     $ 118.1 $ 123.5