v2.4.0.6
Future Minimum Payments Under Non-Cancelable Operating Leases, Along with Sublease Income Amounts (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Schedule of Operating Leases [Line Items]  
Operating Leases $ 2,954
Sub-lease Income 75
Net Operating Leases 2,879
2012
  
Schedule of Operating Leases [Line Items]  
Operating Leases 389
Sub-lease Income 17
Net Operating Leases 372
2013
  
Schedule of Operating Leases [Line Items]  
Operating Leases 377
Sub-lease Income 16
Net Operating Leases 361
2014
  
Schedule of Operating Leases [Line Items]  
Operating Leases 357
Sub-lease Income 14
Net Operating Leases 343
2015
  
Schedule of Operating Leases [Line Items]  
Operating Leases 311
Sub-lease Income 13
Net Operating Leases 298
2016
  
Schedule of Operating Leases [Line Items]  
Operating Leases 256
Sub-lease Income 10
Net Operating Leases 246
Thereafter
  
Schedule of Operating Leases [Line Items]  
Operating Leases 1,264
Sub-lease Income 5
Net Operating Leases $ 1,259