Debt Leases and Banking Arrangements (Tables)

12 Months Ended

Dec. 31, 2010

Debt Leases and Banking Arrangements (Tables) [Abstract]

Long-term Debt

	Weighted-
	Average
	Interest			December 31,
	Rate(1)			2010(2)			2009(2)
				(Millions)
Secured
Capital lease obligations		12.0	%	$	4		$	3
Unsecured
3.8% to 10.25%, payable through 2040		6.4	%		9,104			8,023
Adjustable rate					—			250
Total long-term debt, including current portion					9,108			8,276
Long-term debt due within one year					(508	)		(17	)
Long-term debt				$	8,600		$	8,259

(1)	At December 31, 2010.
(2)	Certain of our debt agreements contain covenants that restrict or limit, among other things, our ability to create liens supporting indebtedness, sell assets, and incur additional debt. Default of these agreements could also restrict our ability to make certain distributions or repurchase equity.

Letters of credit issued and loans outstanding under credit facilities of company

		Letters of Credit at
	Expiration	December 31, 2010
		(Millions)
$900 million unsecured credit facility	May 1, 2012	$	—
$1.75 billion Williams Partners L.P. unsecured credit facility	February 17, 2013		—
Bilateral bank agreements			90
		$	90

Senior Unsecured Notes

	(Millions)
3.80% Senior Notes due 2015	$	750
5.25% Senior Notes due 2020		1,500
6.30% Senior Notes due 2040		1,250
Total	$	3,500

Corporate Debt Retired

	(Millions)
7.125% Notes due 2011	$	429
8.125% Notes due 2012		602
7.625% Notes due 2019		668
8.75% Senior Notes due 2020		586
7.875% Notes due 2021		179
7.70% Debentures due 2027		98
7.50% Debentures due 2031		163
7.75% Notes due 2031		111
8.75% Notes due 2032		164
Total	$	3,000

Aggregate minimum maturities of long-term debt

	(Millions)
2011	$	507
2012		352
2013		—
2014		—
2015		750

Future minimum annual rentals under noncancelable operating leases

	(Millions)
2011	$	55
2012		44
2013		40
2014		32
2015		27
Thereafter		181
Total	$	379