Consolidated Statement of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Comprehensive income (loss):
Net income (loss)	$ 214	$ 270
Cash flow hedging activities:
Net unrealized gain (loss) from derivative instruments	0	1
Pension and other postretirement benefits:
Amortization of actuarial (gain) loss included in net periodic benefit cost (credit), net of taxes of ($1) in 2019 and 2018	3	5
Other comprehensive income (loss)	3	6
Comprehensive income (loss)	217	276
Less: Comprehensive income (loss) attributable to noncontrolling interests	19	119
Comprehensive income (loss) attributable to The Williams Companies, Inc.	$ 198	$ 157