Earnings Per Common Share (Tables)

3 Months Ended

Mar. 31, 2018

Earnings Per Share [Abstract]

Earnings per common share [Table Text Block]

	Three Months Ended   March 31,
	2018		2017
	(Dollars in millions, except per-share amounts; shares in thousands)
Net income attributable to The Williams Companies, Inc. available to common stockholders for basic and diluted earnings per common share	$	152	$	373
Basic weighted-average shares	827,509		824,548
Effect of dilutive securities:
Nonvested restricted stock units	2,095		1,305
Stock options	593		623
Diluted weighted-average shares	830,197		826,476
Earnings per common share:
Basic	$	.18	$	.45
Diluted	$	.18	$	.45