Undercover zillionaires

Methodology: Total compensation is calculated as the sum of base salary, discretionary and performance-based cash bonuses, the grant-date fair value for stock and option awards during the fiscal year, and other compensation like earnings on deferred compensation, benefits and perks. Equilar, an executive compensation research firm, looked at CEOs at 1,000 of the largest public U.S. companies as measured by revenue. Pay data based on companies' fiscal year end of Dec. 2010 unless otherwise noted. Cash compensation and stock and options increases may not add up exactly to total compensation increases due to rounding.