Unaudited Quarterly Financial Information

12 Months Ended

Sep. 30, 2018

Quarterly Financial Information Disclosure [Abstract]

Unaudited Quarterly Financial Information

Note U. Unaudited Quarterly Financial Information

Unaudited financial results by quarter for fiscal 2018 and 2017 are summarized below:

	Quarters Ended										Year Ended
	December 31,			March 31,			June 30,		September 30,		September 30,
	2017			2018			2018		2018		2018
	(In millions, except per share amounts)
Net sales and other operating revenues	$	720		$	818		$	854	$	850	$	3,242
Gross profit	$	178		$	190		$	200	$	213	$	781
Net income (loss)	$	(112	)	$	(163	)	$	99	$	102	$	(74	)
Net income (loss) attributable to Cabot    Corporation	$	(122	)	$	(173	)	$	88	$	94	$	(113	)
Earnings per common share—basic	$	(1.98	)	$	(2.80	)	$	1.41	$	1.51	$	(1.85	)
Earnings per common share—diluted	$	(1.98	)	$	(2.80	)	$	1.40	$	1.51	$	(1.85	)

During the fourth quarter of fiscal 2018, Cabot recorded a pre-tax gain of $28 million on the sale of its land rights in Thane, India as discussed further in Note O. In addition, the tax benefit for the quarter includes a $19 million net benefit from discrete tax items primarily related to a revision of the estimate of the impact of the recent U.S. tax reform as discussed further in Note R.

	Quarters Ended								Year Ended
	December 31,		March 31,		June 30,		September 30,		September 30,
	2016		2017		2017		2017		2017
	(In millions, except per share amounts)
Net sales and other operating revenues	$	611	$	678	$	705	$	723	$	2,717
Gross profit	$	159	$	169	$	161	$	174	$	663
Net income (loss)	$	59	$	80	$	55	$	79	$	273
Net income (loss) attributable to Cabot    Corporation	$	55	$	74	$	47	$	72	$	248
Earnings per common share—basic	$	0.87	$	1.19	$	0.73	$	1.15	$	3.94
Earnings per common share—diluted	$	0.86	$	1.19	$	0.73	$	1.13	$	3.91