Shareholders' Equity (Tables)

6 Months Ended

Jun. 30, 2011

Shareholders' Equity [Abstract]

Shareholders' Equity Activity Summarization [Table]

							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		181			181			-
Comprehensive income:
Net income		1,252			1,250			2
Other comprehensive income		3			3			-
Total comprehensive income		1,255			1,253			2
Payments of dividends to shareholders		(165	)		(165	)		-
Balance at June 30, 2011	$	11,658		$	11,642		$	16

							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		96			98			(2	)
Comprehensive income:
Net income		690			686			4
Other comprehensive income		4			4			-
Total comprehensive income		694			690			4
Payments of dividends to shareholders		(163	)		(163	)		-
Balance at June 30, 2010	$	9,384		$	9,353		$	31

Comprehensive Income [Table]

	Three Months Ended
	June 30
Millions of dollars	2011		2010
Net income	$	741	$	483
Other comprehensive income (loss)		1		(3	)
Total comprehensive income	$	742	$	480
Comprehensive income attributable to noncontrolling interest		2		3
Comprehensive income attributable to company		740		477

Accumulated other comprehensive income [Table]

	June 30,			December 31,
Millions of dollars	2011			2010
Defined benefit and other postretirement liability adjustments	$	(176	)	$	(175	)
Cumulative translation adjustments		(64	)		(66	)
Unrealized gains on investments		3			1
Total accumulated other comprehensive loss	$	(237	)	$	(240	)