Earnings (Loss) Per Common Share from Continuing Operations (Tables)

12 Months Ended

Dec. 31, 2014

Earnings Per Share [Abstract]

Earnings (loss) per common share from continuing operations [Table Text Block]

	Years Ended December 31,
	2014		2013		2012
	(Dollars in millions, except per-share amounts; shares in thousands)
Income (loss) from continuing operations attributable to The Williams Companies, Inc. available to common stockholders for basic and diluted earnings (loss) per common share	$	2,110	$	441	$	723
Basic weighted-average shares	719,325		682,948		619,792
Effect of dilutive securities:
Nonvested restricted stock units	2,234		1,995		2,694
Stock options	2,064		2,149		2,608
Convertible debentures	18		93		392
Diluted weighted-average shares	723,641		687,185		625,486
Earnings (loss) per common share from continuing operations:
Basic	$	2.93	$	.65	$	1.17
Diluted	$	2.91	$	.64	$	1.15