Quarterly report pursuant to Section 13 or 15(d)

Accounting Guidance (Details Textual)

v3.10.0.1
Accounting Guidance (Details Textual) - USD ($)
9 Months Ended
Nov. 30, 2018
Nov. 30, 2017
Mar. 01, 2018
Statement of Cash Flows [Abstract]      
Cash flows from operating activities $ 1,973,900,000 $ 1,468,400,000  
Cash flows from investing activities (4,587,300,000) (1,038,300,000)  
Cash flows from financing activities $ 2,661,300,000 (458,100,000)  
Accounting Standards Update 2014-09, Revenue recognition [Member] | Revenue Recognition Adjustment [Member]      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Opening retained earnings adjustment     $ (49,000,000)
Statement of Cash Flows [Abstract]      
Cash flows from operating activities   0  
Cash flows from investing activities   0  
Cash flows from financing activities   $ 0  
Accounting Standards Update 2016-16, Income taxes [Member]      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Opening retained earnings adjustment     2,200,000,000
Statement of Cash Flows [Abstract]      
Deferred tax assets adjustment     $ 2,200,000,000