Consolidated Statement of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Comprehensive income (loss):
Net income (loss)	$ 569	$ (13)
Cash flow hedging activities:
Net unrealized gain (loss) from derivative instruments, net of taxes of ($1) in 2017	3	0
Foreign currency translation adjustments, net of taxes of ($15) in 2016	0	89
Pension and other postretirement benefits:
Amortization of prior service cost (credit) included in net periodic benefit cost	(1)	(1)
Amortization of actuarial (gain) loss included in net periodic benefit cost, net of taxes of ($3) in 2017 and 2016	4	5
Other comprehensive income (loss)	6	93
Comprehensive income (loss)	575	80
Less: Comprehensive income (loss) attributable to noncontrolling interests	197	81
Comprehensive income (loss) attributable to The Williams Companies, Inc.	$ 378	$ (1)