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Summary of Significant Accounting Policies - Revisions (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Aug. 31, 2015
Aug. 31, 2014
Nov. 30, 2014
Cash provided by operations:      
Net income $ 1,179 $ 962 $ 1,617
Amortization and other 11 8 15
Net foreign currency adjustments 32 53 243
Cash provided by operations 491 683 1,547
Cash (used) provided by investing activities:      
Effect of exchange rate changes on cash and equivalents (38) 2 (24)
Cash used by financing activities:      
Net increase (decrease) in cash and equivalents (606) 83 53
Cash and equivalents, beginning of period 3,852 2,220 2,220
CASH AND EQUIVALENTS, END OF PERIOD 3,246 2,303 2,273
As Reported      
Cash provided by operations:      
Net income   962 1,617
Amortization and other   (34) (54)
Net foreign currency adjustments   0 0
Cash provided by operations   588 1,235
Cash (used) provided by investing activities:      
Effect of exchange rate changes on cash and equivalents   97 288
Cash used by financing activities:      
Net increase (decrease) in cash and equivalents   83 53
Cash and equivalents, beginning of period   2,220 2,220
CASH AND EQUIVALENTS, END OF PERIOD   2,303 2,273
Prior Period Revisions to Foreign Currency Adjustments      
Cash used by financing activities:      
Net increase (decrease) in cash and equivalents $ 0    
Prior Period Revisions to Foreign Currency Adjustments | Adjustment      
Cash provided by operations:      
Net income   0 0
Amortization and other   42 69
Net foreign currency adjustments   53 243
Cash provided by operations   95 312
Cash (used) provided by investing activities:      
Effect of exchange rate changes on cash and equivalents   (95) (312)
Cash used by financing activities:      
Net increase (decrease) in cash and equivalents   0 0
Cash and equivalents, beginning of period   0 0
CASH AND EQUIVALENTS, END OF PERIOD   $ 0 $ 0