Quarterly report pursuant to Section 13 or 15(d)

Borrowings (Details Textual 2)

v2.4.0.8
Borrowings (Details Textual 2) (USD $)
6 Months Ended 1 Months Ended
Aug. 31, 2014
Aug. 31, 2013
May 14, 2013
Senior Notes [Member]
May 2013 Eight Year Senior Notes [Member]
May 14, 2013
Senior Notes [Member]
May 2013 Ten Year Senior Notes [Member]
May 31, 2013
Senior Notes [Member]
May 2013 Senior Notes [Member]
Aug. 31, 2014
Senior Notes [Member]
May 2013 Senior Notes [Member]
Jun. 07, 2013
Senior Notes [Member]
May 2013 Senior Notes [Member]
May 14, 2013
Senior Notes [Member]
May 2013 Senior Notes [Member]
Schedule of Debt [Line Items]                
Aggregate principal amount of notes     $ 500,000,000.0 $ 1,050,000,000.0     $ 1,550,000,000.0  
Coupon rate of notes     3.75% 4.25%        
Net proceeds from issuance of senior notes 0 3,725,000,000     1,535,500,000      
Percentage of outstanding principal amount as redemption price         100.00%      
Basis points above adjusted treasury rate         50.00%      
Percentage of outstanding principal amount, Escrowed               100.00%
Aggregate principal amount outstanding           $ 1,550,000,000.0