XML 85 R71.htm IDEA: XBRL DOCUMENT v3.10.0.1
Stockholders' Deficit - Narrative (Details) - USD ($)
shares in Millions, $ in Millions
1 Months Ended 3 Months Ended
Jun. 19, 2018
Feb. 28, 2019
Feb. 28, 2018
Jan. 31, 2019
Jan. 31, 2018
Stockholders' Equity Note [Abstract]          
Repurchases of common stock (shares)       32.0 20.0
Payment in connection with repurchases of shares       $ 720 $ 462
Subsequent Event [Line Items]          
Share repurchases that will be settled in subsequent period (shares)     0.6    
Share repurchase increase in authorization $ 4,000        
Share repurchase authorization remaining       $ 3,200  
Subsequent event          
Subsequent Event [Line Items]          
Share repurchases that will be settled in subsequent period (shares)   0.9