(In Millions, Except Per Share Amounts) | 2013 | 2012 | 2011 | |||||||||
Net income available to common stockholders | $ | 9,620 | $ | 11,005 | $ | 12,942 | ||||||
Weighted average common shares outstanding—basic | 4,970 | 4,996 | 5,256 | |||||||||
Dilutive effect of employee equity incentive plans | 68 | 100 | 101 | |||||||||
Dilutive effect of convertible debt | 59 | 64 | 54 | |||||||||
Weighted average common shares outstanding—diluted | 5,097 | 5,160 | 5,411 | |||||||||
Basic earnings per common share | $ | 1.94 | $ | 2.20 | $ | 2.46 | ||||||
Diluted earnings per common share | $ | 1.89 | $ | 2.13 | $ | 2.39 | ||||||