Note 5. Shareholders' Equity The following tables summarize our shareholders' equity activity.
| | | | | | | | | Noncontrolling | | | | | Total | | | Company | | | interest in | | | | | shareholders' | | | shareholders' | | | consolidated | | Millions of dollars | | equity | | | equity | | | subsidiaries | | Balance at December 31, 2010 | | $ | 10,387 | | | $ | 10,373 | | | $ | 14 | | Transactions with shareholders | | | 299 | | | | 299 | | | | - | | Comprehensive income: | | | | | | | | | | | | | Net income | | | 1,937 | | | | 1,933 | | | | 4 | | Total comprehensive income | | | 1,937 | | | | 1,933 | | | | 4 | | Payments of dividends to shareholders | | | (247 | ) | | | (247 | ) | | | - | | Balance at September 30, 2011 | | $ | 12,376 | | | $ | 12,358 | | | $ | 18 | |
| | | | | | | | | Noncontrolling | | | | | Total | | | Company | | | interest in | | | | | shareholders' | | | shareholders' | | | consolidated | | Millions of dollars | | equity | | | equity | | | subsidiaries | | Balance at December 31, 2009 | | $ | 8,757 | | | $ | 8,728 | | | $ | 29 | | Transactions with shareholders | | | 111 | | | | 131 | | | | (20 | ) | Treasury shares issued for acquisition of | | | | | | | | | | | | | Boots & Coots, Inc. | | | 105 | | | | 105 | | | | - | | Shares repurchased | | | (114 | ) | | | (114 | ) | | | - | | Comprehensive income: | | | | | | | | | | | | | Net income | | | 1,235 | | | | 1,230 | | | | 5 | | Other comprehensive income | | | 4 | | | | 5 | | | | (1 | ) | Total comprehensive income | | | 1,239 | | | | 1,235 | | | | 4 | | Payments of dividends to shareholders | | | (245 | ) | | | (245 | ) | | | - | | Balance at September 30, 2010 | | $ | 9,853 | | | $ | 9,840 | | | $ | 13 | |
The following table summarizes comprehensive income for the quarterly periods presented.
| | | Three Months Ended | | | | | September 30 | | Millions of dollars | | 2011 | | | 2010 | | Net income | | $ | 685 | | | $ | 545 | | Total comprehensive income | | $ | 685 | | | $ | 545 | | Comprehensive income attributable to noncontrolling interest | | | 2 | | | | 1 | | Comprehensive income attributable to company | | | 683 | | | | 544 | |
Accumulated other comprehensive loss consisted of the following:
| | | September 30, | | | December 31, | | Millions of dollars | | 2011 | | | 2010 | | Defined benefit and other postretirement liability adjustments | | $ | (175 | ) | | $ | (175 | ) | Cumulative translation adjustments | | | (66 | ) | | | (66 | ) | Unrealized gains on investments | | | 1 | | | | 1 | | Total accumulated other comprehensive loss | | $ | (240 | ) | | $ | (240 | ) |
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