XML 1121 R51.htm IDEA: XBRL DOCUMENT v2.4.0.6
Non-cash, Pre-tax, Goodwill Impairment Charges (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended 12 Months Ended
Nov. 01, 2009
Jan. 31, 2010
Jul. 29, 2012
Jan. 29, 2012
Jan. 30, 2011
Feb. 01, 2009
Goodwill [Line Items]            
Beginning Goodwill   $ 3,373 [1]        
Impairment Charges (224) (224) [1]        
Remaining Goodwill   3,149 [1] 3,279 3,151 3,150 3,368
Water Works
           
Goodwill [Line Items]            
Remaining Goodwill       1,052 1,040  
Utilities
           
Goodwill [Line Items]            
Remaining Goodwill       186 197  
Repair And Remodel
           
Goodwill [Line Items]            
Remaining Goodwill       95 95  
Industrial Pipes Valves And Fittings
           
Goodwill [Line Items]            
Beginning Goodwill   6        
Impairment Charges   (6)        
Segment, Continuing Operations
           
Goodwill [Line Items]            
Beginning Goodwill   3,367 [1]        
Impairment Charges   (219) [1]        
Remaining Goodwill   3,149 [1]        
Segment, Continuing Operations | Water Works
           
Goodwill [Line Items]            
Beginning Goodwill   1,174        
Impairment Charges   (134)        
Remaining Goodwill   1,040        
Segment, Continuing Operations | Utilities
           
Goodwill [Line Items]            
Beginning Goodwill   250        
Impairment Charges   (54)        
Remaining Goodwill   196        
Segment, Continuing Operations | Repair And Remodel
           
Goodwill [Line Items]            
Beginning Goodwill   125        
Impairment Charges   (30)        
Remaining Goodwill   95        
Segment, Continuing Operations | Other
           
Goodwill [Line Items]            
Beginning Goodwill   1,818        
Impairment Charges             
Remaining Goodwill   $ 1,818        
[1] Does not sum due to rounding