Additional Shareholders' Equity Information (Tables)

12 Months Ended

Dec. 31, 2011

Activity in shares of our common stock and treasury stock was as follows:

	Year Ended December 31,
	2011			2010
Common Stock Shares Issued
Shares, Beginning of Period		195,440,048			193,550,391
Exercise of Common Stock Options		837,096			1,502,454
Restricted Stock Awards, Net of Forfeitures		379,702			387,203
Shares, End of Period		196,656,846			195,440,048
Treasury Stock
Shares, Beginning of Period		18,650,064			18,582,301
Shares Received From Employees in Payment of Withholding Taxes Due on Vesting of Shares of Restricted Stock		186,556			167,863
Rabbi Trust Shares Distributed and/or Sold		(100,100	)		(100,100	)
Shares, End of Period		18,736,520			18,650,064

Accumulated other comprehensive loss in the shareholders' equity section of the balance sheet included:

	Accumulated Other Comprehensive Loss
	Oil and Gas Cash Flow Hedges			Interest Rate Cash Flow Hedges			Pension- Related and Other			Total
(millions)
December 31, 2008	$	(48	)	$	(3	)	$	(59	)	$	(110	)
Realized Amounts Reclassified Into Earnings		36			1			2			39
Net Change in Other		-			-			(4	)		(4	)
December 31, 2009		(12	)		(2	)		(61	)		(75	)
Realized Amounts Reclassified Into Earnings		12			1			3			16
Unrealized Change in Fair Value		-			(41	)		(4	)		(45	)
December 31, 2010		-			(42	)		(62	)		(104	)
Realized Amounts Reclassified Into Earnings		-			1			4			5
Unrealized Change in Fair Value		-			15			(16	)		(1	)
December 31, 2011	$	-		$	(26	)	$	(74	)	$	(100	)