Debt Leases and Banking Arrangements (Tables)

12 Months Ended

Dec. 31, 2012

Debt Leases and Banking Arrangements [Abstract]

Long-term Debt

			December 31,
			2012		2011
				(Millions)
Unsecured:
	Transco:
		8.875% Notes due 2012	$	-	$	325
		6.4% Notes due 2016		200		200
		6.05% Notes due 2018		250		250
		7.08% Debentures due 2026		8		8
		7.25% Debentures due 2026		200		200
		5.4% Notes due 2041		375		375
		4.45% Notes due 2042		400		-
	Northwest Pipeline:
		7% Notes due 2016		175		175
		5.95% Notes due 2017		185		185
		6.05% Notes due 2018		250		250
		7.125% Debentures due 2025		85		85
	WPZ:
		3.8% Notes due 2015		750		750
		7.25% Notes due 2017		600		600
		5.25% Notes due 2020		1,500		1,500
		4.125% Notes due 2020		600		600
		4% Notes due 2021		500		500
		3.35% Notes due 2022		750		-
		6.3% Notes due 2040		1,250		1,250
		Revolving credit loans		375		-
	The Williams Companies, Inc.:
		7.875% Notes due 2021		371		371
		3.7% Notes due 2023		850		-
		7.5% Debentures due 2031		339		339
		7.75% Notes due 2031		252		252
		8.75% Notes due 2032		445		445
		Various - 5.5% to 10.25% Notes and Debentures due 2019 to 2033		57		90
Other, including secured capital lease obligations				2		4
Net unamortized debt discount				(33)		(32)
Total long-term debt, including current portion				10,736		8,722
Long-term debt due within one year				(1)		(353)
Long-term debt			$	10,735	$	8,369

Aggregate minimum maturities of long-term debt

	(Millions)
2013	$	-
2014	$	-
2015	$	750
2016	$	750
2017	$	785

Future minimum annual rentals under noncancelable operating leases

		(Millions)
2013		$	50
2014			44
2015			42
2016			35
2017			27
Thereafter			138
	Total	$	336