Earnings (Loss) Per Common Share (Tables)

6 Months Ended

Jun. 30, 2017

Earnings Per Share [Abstract]

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

	Three Months Ended   June 30,					Six Months Ended   June 30,
	2017		2016			2017		2016
	(Dollars in millions, except per-share amounts; shares in thousands)
Net income (loss) attributable to The Williams Companies, Inc. available to common stockholders for basic and diluted earnings (loss) per common share	$	81	$	(405	)	$	454	$	(470	)
Basic weighted-average shares	826,426		750,649			825,492		750,491
Effect of dilutive securities:
Nonvested restricted stock units	1,499		—			1,402		—
Stock options	650		—			637		—
Diluted weighted-average shares	828,575		750,649			827,531		750,491
Earnings (loss) per common share:
Basic	$	.10	$	(.54	)	$	.55	$	(.63	)
Diluted	$	.10	$	(.54	)	$	.55	$	(.63	)