The following is an excerpt from Walmart's 2015 Form 10-K :

A summary of the provision for income taxes is as follows ($ millions):

Current:

U.S. federal                                         $6,165

U.S. state and local                                   810

International                                           1,529

Total current tax provision                     8,504

Deferred:

U.S. federal                                             (387)

U.S. state and local                                   (55)

International                                               (77)

Total deferred tax expense (benefit)      $(519)

What amount of income tax expense does Walmart report in its income statement for 2015?

How much of Walmart's income tax expense was determined from the company's tax returns?