QUARTERLY FINANCIAL DATA (UNAUDITED) (Notes)

12 Months Ended

Dec. 31, 2017

Quarterly Financial Data [Abstract]

QUARTERLY FINANCIAL DATA (UNAUDITED)

QUARTERLY FINANCIAL DATA (UNAUDITED)

Year Ended December 31, 2017	First Quarter		Second Quarter		Third Quarter		Fourth Quarter
	(Thousands of dollars, except per share amounts)
Total revenues	$	2,749,611	$	2,725,772	$	2,906,366	$	3,792,158
Net income	$	186,185	$	175,991	$	166,531	$	64,812
Net income attributable to ONEOK	$	87,361	$	71,693	$	165,742	$	63,045
Net income attributable to common shareholders	$	87,361	$	71,476	$	165,466	$	62,771
Earnings per share total
Basic	$	0.41	$	0.34	$	0.43	$	0.16
Diluted	$	0.41	$	0.33	$	0.43	$	0.16

The fourth quarter 2017 includes a one-time noncash charge of $141.3 million related to revaluation of our deferred tax balances and a valuation allowance on certain state net operating loss and tax credit carryforwards resulting from the enactment of the Tax Cuts and Jobs Act, as described in Note M.

The third quarter 2017 includes noncash impairment charges of $20.2 million related to Natural Gas Gathering and Processing assets and equity investments.

The second quarter 2017 includes a $20.0 million noncash expense related to our Series E Preferred Stock contribution to the Foundation and operating costs related to the Merger Transaction of $30.0 million.

	First Quarter			Second Quarter			Third Quarter			Fourth Quarter
Year Ended December 31, 2016
	(Thousands of dollars except per share amounts)
Total revenues	$	1,774,459		$	2,134,107		$	2,357,907		$	2,654,461
Income from continuing operations	$	175,911		$	180,086		$	194,792		$	194,761
Income (loss) from discontinued operations, net of tax	$	(952	)	$	(227	)	$	(576	)	$	(296	)
Net income	$	174,959		$	179,859		$	194,216		$	194,465
Net income attributable to ONEOK	$	83,446		$	85,944		$	92,144		$	90,505
Earnings per share total
Basic	$	0.40		$	0.41		$	0.44		$	0.43
Diluted	$	0.40		$	0.40		$	0.43		$	0.43