Consolidated Statement of Comprehensive Income (Loss) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Comprehensive income (loss):
Net income (loss)	$ (1,314)	$ 2,339	$ 668
Cash flow hedging activities:
Net unrealized gain (loss) from derivative instruments, net of taxes	6	0	1
Reclassifications into earnings of net derivative instruments (gain) loss, net of taxes	(6)	0	(1)
Foreign currency translation adjustments, net of taxes	(204)	(96)	(41)
Pension and other postretirement benefits:
Prior service credit (cost) arising during the year, net of taxes	0	(1)	14
Amortization of prior service cost (credit) included in net periodic benefit cost, net of taxes	(3)	(5)	(2)
Net actuarial gain (loss) arising during the year, net of taxes	8	(100)	189
Amortization of actuarial (gain) loss included in net periodic benefit cost, net of taxes	28	26	38
Other comprehensive income (loss)	(171)	(176)	198
Comprehensive income (loss)	(1,485)	2,163	866
Less: Comprehensive income (loss) attributable to noncontrolling interests	(813)	206	238
Comprehensive Income (loss) attributable to The Williams Companies, Inc.	$ (672)	$ 1,957	$ 628