Consolidated Statement of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Comprehensive income (loss):
Net income (loss)	$ (505)	$ 183	$ (518)	$ 196
Other comprehensive income (loss):
Foreign currency translation adjustments, net of taxes of $3 and ($12) in 2016 and ($6) and $10 in 2015, respectively	10	10	99	(85)
Pension and other postretirement benefits:
Amortization of prior service cost (credit) included in net periodic benefit cost, net of taxes of $1 and $1 and $0 and $1 in 2016 and 2015, respectively.	(1)	(1)	(2)	(2)
Net actuarial gain (loss) arising during the year, net of taxes of $2.	(3)	0	(3)	0
Amortization of actuarial (gain) loss included in net periodic benefit cost, net of taxes of $(3) and $(6) in 2016 and ($4) and ($8) in 2015, respectively.	5	7	10	14
Other comprehensive income (loss)	11	16	104	(73)
Comprehensive income (loss)	(494)	199	(414)	123
Less: Comprehensive income (loss) attributable to noncontrolling interests	(98)	74	(17)	(18)
Comprehensive income (loss) attributable to The Williams Companies, Inc.	$ (396)	$ 125	$ (397)	$ 141