The following table details the activity of the four components that comprise Accumulated other comprehensive loss for both Arconic’s shareholders and noncontrolling interests:



	Arconic									Noncontrolling Interests
	2017			2016			2015			2017			2016			2015
Pension and other postretirement benefits (U)
Balance at beginning of period	$	(2,010	)	$	(3,611	)	$	(3,601	)	$	—		$	(56	)	$	(64	)
Other comprehensive (loss) income:
Unrecognized net actuarial loss and prior service cost/benefit	(466		)	(1,112		)	(478		)	—			(9		)	5
Tax benefit (expense)	102			380			170			—			3			(1		)
Total Other comprehensive (loss) income before reclassifications, net of tax	(364		)	(732		)	(308		)	—			(6		)	4
Amortization of net actuarial loss and prior service cost/benefit⁽¹⁾	222			389			458			—			4			6
Tax expense⁽²⁾	(78		)	(136		)	(160		)	—			(1		)	(2		)
Total amount reclassified from Accumulated other comprehensive loss, net of tax⁽⁸⁾	144			253			298			—			3			4
Total Other comprehensive (loss) income	(220		)	(479		)	(10		)	—			(3		)	8
Transfer to Alcoa Corporation	—			2,080			—			—			59			—
Balance at end of period	$	(2,230	)	$	(2,010	)	$	(3,611	)	$	—		$	—		$	(56	)
Foreign currency translation
Balance at beginning of period	$	(689	)	$	(2,412	)	$	(846	)	$	(2	)	$	(780	)	$	(351	)
Other comprehensive income (loss)⁽³⁾	252			268			(1,566		)	2			182			(429		)
Transfer to Alcoa Corporation	—			1,455			—			—			596			—
Balance at end of period	$	(437	)	$	(689	)	$	(2,412	)	$	—		$	(2	)	$	(780	)
Available-for-sale securities
Balance at beginning of period	$	132		$	(5	)	$	—		$	—		$	—		$	—
Other comprehensive (loss) income ⁽⁴⁾	(134		)	137			(5		)	—			—			—
Transfer to Alcoa Corporation	—			—			—			—			—			—
Balance at end of period	$	(2	)	$	132		$	(5	)	$	—		$	—		$	—
Cash flow hedges
Balance at beginning of period	$	(1	)	$	597		$	(230	)	—			$	(3	)	$	(2	)
Other comprehensive income (loss):
Net change from periodic revaluations	37			(843		)	1,138			—			36			(1		)
Tax (expense) benefit	(9		)	252			(340		)	—			(10		)	—
Total Other comprehensive income (loss) before reclassifications, net of tax	28			(591		)	798			—			26			(1		)
Net amount reclassified to earnings:
Aluminum contracts⁽⁵⁾	(2		)	1			21			—			—			—
Energy contracts⁽⁶⁾	—			(49		)	6			—			(34		)	—
Foreign exchange contracts⁽⁵⁾	—			—			5			—			—			—
Interest rate contracts⁽⁷⁾	—			9			1			—			5			—
Nickel contracts⁽⁶⁾	(1		)	1			2			—			—			—
Sub-total	(3		)	(38		)	35			—			(29		)	—
Tax benefit (expense)⁽²⁾	1			12			(6		)	—			8			—
Total amount reclassified from Accumulated other comprehensive loss, net of tax⁽⁸⁾	(2		)	(26		)	29			—			(21		)	—
Total Other comprehensive income (loss)	26			(617		)	827			—			5			(1		)
Transfer to Alcoa Corporation	—			19			—			—			(2		)	—
Balance at end of period	$	25		$	(1	)	$	597		$	—		$	—		$	(3	)


⁽¹⁾	These amounts were included in the computation of net periodic benefit cost for pension and other postretirement benefits (see Note T).


⁽²⁾	These amounts were included in Provision for income taxes on the accompanying Statement of Consolidated Operations.


⁽³⁾	In all periods presented, there were no tax impacts related to rate changes and no amounts were reclassified to earnings.


⁽⁴⁾	Realized gains and losses were included in Other income, net on the accompanying Statement of Consolidated Operations.


⁽⁵⁾	These amounts were included in Sales on the accompanying Statement of Consolidated Operations.


⁽⁶⁾	These amounts were included in Cost of goods sold on the accompanying Statement of Consolidated Operations.


⁽⁷⁾	These amounts were included in Interest expense on the accompanying Statement of Consolidated Operations.


⁽⁸⁾	A positive amount indicates a corresponding charge to earnings and a negative amount indicates a corresponding benefit to earnings. These amounts were reflected on the accompanying Statement of Consolidated Operations in the line items indicated in footnotes 1 through 7.