v2.4.0.6
Debt (Narrative) (Details) (USD $)
0 Months Ended 1 Months Ended
Apr. 07, 2012
May 31, 2012
Jun. 30, 2012
Principal amount of senior notes issued   $ 2,500,000,000  
Proceeds from senior notes   2,465,000,000  
Senior Credit Facility, borrowing capacity     2,190,000,000
Outstanding Senior Credit Facility borrowings     0
Debt-to-capitalization ratio     0.238
Outstanding commercial paper     2,100,000,000
Average borrowing rate on commercial paper borrowings     0.40%
Senior Credit Facility, amount matured and not extended $ 460,000,000    
Maximum [Member] | Maximum Debt To Capitalization Ratio Allowed By Covenants [Member]
     
Debt-to-capitalization ratio     0.65