Depreciation & amortization = $1.5 billion
Capital expenditures = $250 million
Change in working capital = $3.5 billion
Net debt = $500 million
Following the formula, you'll get:
FCFE = NI + D&A - CE - CiWC + ND
FCFE = $2 billion + $1.5 billion - $250 million - $3.5 billion + $500 million
FCFE = $250 million
This would tell you that your company has a positive free cash flow to equity, meaning it likely hasn't needed to borrow to fund its operations. If the number had been negative, borrowing would have almost certainly been involved for some kind of project or dividend payout.
From here, it's important to determine why that number is negative or positive -- what actions did the company take in the last year to create this situation?