United states securities and exchange commission

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The following table provides a reconciliation of DowDuPont Common Stock activity for the year ended December 31, 2017 :

Shares of DowDuPont Common Stock	Issued		Held in Treasury
In thousands
Balance at Sep 1, 2017	2,338,537		—
Issued	2,919		—
Repurchased	—		14,123
Balance at Dec 31, 2017	2,341,456		14,123

Accumulated Other Comprehensive Loss

The following table summarizes the changes and after-tax balances of each component of accumulated other comprehensive loss for the years ended December 31, 2017 , 2016 , and 2015 :

Accumulated Other Comprehensive Loss 1		Unrealized Gains (Losses) on Investments			Cumulative Translation Adj			Pension and Other Postretire Benefits			Derivative Instruments			Accum Other Comp Loss
In millions
2015
Balance at Jan 1, 2015		$	141		$	(751	)	$	(7,321	)	$	(86	)	$	(8,017	)
Other comprehensive income (loss) before reclassifications		(40		)	(990		)	105			(136		)	(1,061		)
Amounts reclassified from accumulated other comprehensive income (loss)		(54		)	4			447			14			411
Net other comprehensive income (loss)		$	(94	)	$	(986	)	$	552		$	(122	)	$	(650	)
Balance at Dec 31, 2015		$	47		$	(1,737	)	$	(6,769	)	$	(208	)	$	(8,667	)
2016
Other comprehensive income (loss) before reclassifications		32			(644		)	(1,354		)	84			(1,882		)
Amounts reclassified from accumulated other comprehensive income (loss)		(36		)	—			734			29			727
Net other comprehensive income (loss)		$	(4	)	$	(644	)	$	(620	)	$	113		$	(1,155	)
Balance at Dec 31, 2016		$	43		$	(2,381	)	$	(7,389	)	$	(95	)	$	(9,822	)
2017
Other comprehensive income (loss) before reclassifications		25			454			52			(1		)	530
Amounts reclassified from accumulated other comprehensive income (loss)		(71		)	(8		)	414			(15		)	320
Net other comprehensive income (loss)		$	(46	)	$	446		$	466		$	(16	)	$	850
Balance at Dec 31, 2017		$	(3	)	$	(1,935	)	$	(6,923	)	$	(111	)	$	(8,972	)
1.	Prior year amounts have been updated to conform with the current year presentation.

The tax effects on the net activity related to each component of other comprehensive income (loss) for the years ended December 31, 2017 , 2016 , and 2015 were as follows:

Tax Benefit (Expense)
In millions	2017			2016			2015
Unrealized gains (losses) on investments	$	(26	)	$	2		$	(52	)
Cumulative translation adjustments	98			171			(84		)
Pension and other postretirement benefit plans	191			(438		)	252
Derivative instruments	4			32			(70		)
Tax benefit (expense) from income taxes related to other comprehensive income (loss) items	$	267		$	(233	)	$	46

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A summary of the reclassifications out of accumulated other comprehensive loss for the years ended December 31, 2017 , 2016 , and 2015 is provided as follows:

	Reclassifications Out of Accumulated Other Comprehensive Loss					2017			2016			2015			Consolidated Statements of Income Classification
	In millions
	Unrealized gains on investments					$	(110	)	$	(56	)	$	(84	)	See (1) below
	Tax expense					39			20			30			See (2) below
	After tax					$	(71	)	$	(36	)	$	(54	)
	Cumulative translation adjustments					$	(8	)	$	—		$	4		See (3) below
	Pension and other postretirement benefit plans					$	607		$	913		$	665		See (4) below
	Tax benefit					(193		)	(179		)	(218		)	See (2) below
	After tax					$	414		$	734		$	447
	Derivative Instruments					$	(13	)	$	34		$	23		See (5) below
	Tax benefit					(2		)	(5		)	(9		)	See (2) below
	After tax					$	(15	)	$	29		$	14
	Total reclassifications for the period, after tax					$	320		$	727		$	411
1.				"Net sales" and "Sundry income (expense) - net."
2.			"Provision (Credit) for income taxes on continuing operations."
3.					"Sundry income (expense) - net."
4.		These accumulated other comprehensive loss components are included in the computation of net periodic benefit cost of the Company's pension and other postretirement plans. See Note 19 for additional information. In the year ended December 31, 2016, $360 million was included in "Sundry income (expense) - net" ( zero impact on "Provision (Credit) for income taxes on continuing operations") related to the DCC transaction. See Note 3 for additional information.
5.				"Cost of sales" and "Sundry income (expense) - net."