Shareholders' Equity

3 Months Ended

Mar. 31, 2012

Shareholders' Equity [Abstract]

Shareholders' Equity

Note 4. 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, 2011	$	13,216		$	13,198		$	18
Transactions with shareholders		94			95			(1	)
Comprehensive income		637			634			3
Payments of dividends to shareholders		(83	)		(83	)		-
Balance at March 31, 2012	$	13,864		$	13,844		$	20

							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		122			120			2
Comprehensive income		513			513			-
Payments of dividends to shareholders		(82	)		(82	)		-
Balance at March 31, 2011	$	10,940		$	10,924		$	16

The tax effects allocated to each component of other comprehensive income for the three months ended March 31, 2012 and 2011 are not material.