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Borrowings (Details Textual 2) (USD $)
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12 Months Ended | 1 Months Ended | 12 Months Ended | 1 Months Ended | 1 Months Ended | 1 Months Ended | ||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Feb. 28, 2014
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Feb. 28, 2013
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Feb. 29, 2012
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Jun. 30, 2012
Crown Acquisition [Member]
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Jun. 07, 2013
Crown Acquisition [Member]
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Feb. 28, 2014
Senior Notes [Member]
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Feb. 28, 2014
Senior Notes [Member]
August 2006 Senior Notes [Member]
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Feb. 28, 2013
Senior Notes [Member]
August 2006 Senior Notes [Member]
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Aug. 15, 2006
Senior Notes [Member]
August 2006 Senior Notes [Member]
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May 14, 2007
Senior Notes [Member]
Original May 2007 Senior Notes [Member]
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Feb. 28, 2014
Senior Notes [Member]
May 2007 Senior Notes [Member]
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Feb. 28, 2013
Senior Notes [Member]
May 2007 Senior Notes [Member]
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Jan. 31, 2008
Senior Notes [Member]
May 2007 Senior Notes [Member]
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Feb. 28, 2014
Senior Notes [Member]
December 2007 Senior Notes [Member]
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Feb. 28, 2013
Senior Notes [Member]
December 2007 Senior Notes [Member]
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Dec. 05, 2007
Senior Notes [Member]
December 2007 Senior Notes [Member]
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Apr. 30, 2012
Senior Notes [Member]
April 2012 Senior Notes [Member]
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Feb. 28, 2014
Senior Notes [Member]
April 2012 Senior Notes [Member]
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Feb. 28, 2013
Senior Notes [Member]
April 2012 Senior Notes [Member]
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Apr. 17, 2012
Senior Notes [Member]
April 2012 Senior Notes [Member]
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Aug. 31, 2012
Senior Notes [Member]
August 2012 Senior Notes [Member]
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Aug. 14, 2012
Senior Notes [Member]
August 2012 Senior Notes [Member]
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May 14, 2013
Senior Notes [Member]
May 2013 Eight Year Senior Notes [Member]
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May 14, 2013
Senior Notes [Member]
May 2013 Ten Year Senior Notes [Member]
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May 31, 2013
Senior Notes [Member]
May 2013 Senior Notes [Member]
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Feb. 28, 2014
Senior Notes [Member]
May 2013 Senior Notes [Member]
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Jun. 07, 2013
Senior Notes [Member]
May 2013 Senior Notes [Member]
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May 14, 2013
Senior Notes [Member]
May 2013 Senior Notes [Member]
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| Schedule of Debt [Line Items] | ||||||||||||||||||||||||||||
| Aggregate principal amount of notes | $ 700,000,000 | $ 700,000,000 | $ 500,000,000 | $ 600,000,000.0 | $ 650,000,000.0 | $ 500,000,000.0 | $ 1,050,000,000.0 | $ 1,550,000,000.0 | ||||||||||||||||||||
| Coupon rate of notes | 7.25% | 7.25% | 7.25% | 8.375% | 6.00% | 4.625% | 3.75% | 4.25% | ||||||||||||||||||||
| Issuance price of debt | 693,100,000 | 496,700,000 | ||||||||||||||||||||||||||
| Unamortized discount on senior notes | 2,700,000 | 2,200,000 | 3,000,000 | 6,900,000 | 500,000 | 1,000,000 | 3,300,000 | |||||||||||||||||||||
| Effective interest rate on senior notes | 7.40% | 8.50% | ||||||||||||||||||||||||||
| Aggregate principal amount outstanding | 697,800,000 | 697,000,000 | 700,000,000 | 700,000,000 | 499,500,000 | 499,000,000 | 600,000,000.0 | 600,000,000.0 | 1,550,000,000.0 | |||||||||||||||||||
| Exchange of senior notes | 700,000,000 | |||||||||||||||||||||||||||
| Net proceeds from issuance of senior notes | 3,725,000,000 | 2,050,000,000 | 0 | 591,400,000 | 640,600,000 | 1,535,500,000 | ||||||||||||||||||||||
| Percentage of outstanding principal amount as redemption price | 100.00% | 100.00% | ||||||||||||||||||||||||||
| Basis points above adjusted treasury rate | 50.00% | 50.00% | ||||||||||||||||||||||||||
| Acquired equity interest | 50.00% | 50.00% | ||||||||||||||||||||||||||
| Business acquisition, purchase price | 1,850,000,000 | |||||||||||||||||||||||||||
| Percentage of outstanding principal amount, Escrowed | 100.00% | 100.00% | ||||||||||||||||||||||||||
| Percentage of outstanding principal amount as Special Mandatory Redemption price | 100.00% | |||||||||||||||||||||||||||
| Additional credit arrangements | 373,900,000 | 371,500,000 | ||||||||||||||||||||||||||
| Additional credit arrangements, Outstanding | $ 89,200,000 | $ 46,900,000 | ||||||||||||||||||||||||||