v3.25.2
Acquisitions and Dispositions - Narrative (Details)
$ / shares in Units, shares in Millions, $ in Millions
1 Months Ended 3 Months Ended 9 Months Ended
Jul. 31, 2025
USD ($)
Jul. 02, 2025
USD ($)
$ / shares
shares
Dec. 01, 2024
USD ($)
Jul. 31, 2025
USD ($)
Jul. 31, 2025
USD ($)
Jul. 31, 2024
USD ($)
Jul. 31, 2025
USD ($)
Jul. 31, 2024
USD ($)
Business Combination [Line Items]                
Payments for merger related costs         $ 159 $ 23 $ 231 $ 77
Proceeds from sale of a business             210 0
Gain on sale of a business         1 $ 0 245 $ 0
Disposal Group, Disposed of by Sale, Not Discontinued Operations | CTG Business                
Business Combination [Line Items]                
Proceeds from sale of a business     $ 210          
Gain on sale of a business     $ 245          
Juniper Networks, Inc                
Business Combination [Line Items]                
Business acquisition, share price (in USD per share) | $ / shares   $ 40.00            
Gross purchase price   $ 13,386            
Fair value of the replacement awards   927 million            
Stock-based compensation expense         87   87  
Weighted-average useful life (in Years)   6 years 6 months            
Juniper Networks, Inc | Restricted Stock Units (RSUs)                
Business Combination [Line Items]                
Consideration for replacement of Juniper Networks equity awards (in shares) | shares   46            
Total grant date fair value of restricted stock vested       $ 10        
Unrecognized pre-tax stock-based compensation expense $ 563     $ 563 $ 563   $ 563  
Remaining weighted-average vesting period over which pre-tax stock-based compensation expense is expected to be recognized (in years) 1 year 6 months              
Juniper Networks, Inc | Restricted Stock Units, Restricted Stock Awards, Performance Stock Awards, And Stock Options                
Business Combination [Line Items]                
Entity shares issued per acquiree share (as a percent)   2.1