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Earnings (Loss) Per Common Share
 12 Months Ended
Dec. 31, 2017
Earnings Per Share [Abstract]  
Earnings (Loss) Per Common Share [Text Block]
Note 8 – Earnings (Loss) Per Common Share
 
Years Ended December 31,
 
2017
 
2016
 
2015
 
(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
$
2,174

 
$
(424
)
 
$
(571
)
Basic weighted-average shares
826,177

 
750,673

 
749,271

Effect of dilutive securities:
 
 
 
 
 
Nonvested restricted stock units
1,704

 
—

 
—

Stock options
637

 
—

 
—

Diluted weighted-average shares (1)
828,518

 
750,673

 
749,271

Earnings (loss) per common share:
 
 
 
 
 
Basic
$
2.63

 
$
(.57
)
 
$
(.76
)
Diluted
$
2.62

 
$
(.57
)
 
$
(.76
)

________________
(1)
For the years ended December 31, 2016 and December 31, 2015, 0.6 million and 1.7 million weighted-average nonvested restricted stock units, and 0.5 million and 1.5 million weighted-average stock options have been excluded from the computation of diluted earnings (loss) per common share as their inclusion would be antidilutive due to our loss from continuing operations attributable to The Williams Companies, Inc.