Shares Issued | Shares Repurchased | Shares Outstanding | ||||||
Balances, January 1, 2011 | 2,109,316,331 | (307,532,841 | ) | 1,801,783,490 | ||||
Repurchase of shares | (80,514,257 | ) | (80,514,257 | ) | ||||
Exercise of stock options and issuance of other stock awards | 4,639,433 | 4,639,433 | ||||||
Balances, December 31, 2011 | 2,109,316,331 | (383,407,665 | ) | 1,725,908,666 | ||||
Repurchase of shares | (74,897,499 | ) | (74,897,499 | ) | ||||
Issuance of stock awards and exercise of stock options | 2,601,817 | 2,601,817 | ||||||
Balances, December 31, 2012 | 2,109,316,331 | (455,703,347 | ) | 1,653,612,984 | ||||
Repurchase of shares | (67,231,392 | ) | (67,231,392 | ) | ||||
Issuance of stock awards and exercise of stock options | 2,620,820 | 2,620,820 | ||||||
Balances, December 31, 2013 | 2,109,316,331 | (520,313,919 | ) | 1,589,002,412 |