Debt, Banking Arrangements, and Leases (Tables)

12 Months Ended

Dec. 31, 2013

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments [Table Text Block]

Long-Term Debt

	December 31,
	2013			2012
	(Millions)
Unsecured:
Transco:
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			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			750
4.5% Notes due 2023	600			—
6.3% Notes due 2040	1,250			1,250
5.8% Notes due 2043	400			—
Credit facility loans	—			375
The Williams Companies, Inc.:
7.875% Notes due 2021	371			371
3.7% Notes due 2023	850			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	55			57
Other, including secured capital lease obligations	1			2
Net unamortized debt discount	(37		)	(33		)
Total long-term debt, including current portion	11,354			10,736
Long-term debt due within one year	(1		)	(1		)
Long-term debt	$	11,353		$	10,735

Schedule of Maturities of Long-term Debt [Table Text Block]

The following table presents aggregate minimum maturities of long-term debt (excluding net unamortized discount) for each of the next five years:

	December 31, 2013
	(Millions)
2014	$	—
2015	750
2016	375
2017	785
2018	500

Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]

The future minimum annual rentals under noncancelable operating leases, are payable as follows:

	December 31, 2013
	(Millions)
2014	$	53
2015	47
2016	43
2017	36
2018	30
Thereafter	123
Total	$	332