v3.20.2
Accumulated Other Comprehensive Income​ (Tables)
 9 Months Ended
Sep. 30, 2020
Equity [Abstract]  
Schedule of Accumulated Other Comprehensive Income
The following table details the activity of the three components that comprise Accumulated other comprehensive (loss) income for Arconic Corporation (such activity for Noncontrolling interest was immaterial for all periods presented):
Third quarter ended September 30,Nine months ended September 30,
2020​2019​2020​2019
Pension and other postretirement benefits (G)​​​
Balance at beginning of period$(1,784)$(32)​$(43)$(32)
Establishment of additional defined benefit plans— — (1,752)— 
Separation-related adjustments (A)— — (50)— 
Other comprehensive income:​
Unrecognized net actuarial loss and prior service benefit4 1 ​(34)(1)
Tax (expense) benefit(1)(1)​8 — 
Total Other comprehensive income (loss) before reclassifications, net of tax3 — ​(26)(1)
Amortization of net actuarial loss and prior service benefit(1)
36 1 ​153 3 
Tax expense(2)
(8)— ​(35)(1)
Total amount reclassified from Accumulated other comprehensive loss, net of tax(5)
28 1 ​118 2 
Total Other comprehensive income31 1 ​92 1 
Balance at end of period$(1,753)$(31)​$(1,753)$(31)
Foreign currency translation​
Balance at beginning of period$(53)$296 ​$338 $282 
Separation-related adjustments (A)— — (396)— 
Other comprehensive income:
Foreign currency translation(3)
37 45 20 59 
Net amount reclassified to earnings from Accumulated other comprehensive income(3),(5)
— — 22 — 
Total Other comprehensive income37 45 ​42 59 
Balance at end of period$(16)$341 ​$(16)$341 
Cash flow hedges
Balance at beginning of period$(11)$— $— $— 
Separation-related adjustments (A)— — (4)— 
Other comprehensive income:
Net change from periodic revaluations2 — 4 — 
Tax expense(1)— (1)— 
Total Other comprehensive income before reclassifications, net of tax1 — ​3 — 
Net amount reclassified to earnings(4)
14 — 3 — 
Tax expense(2)
(3)— (1)— 
Total amount reclassified from Accumulated other comprehensive loss, net of tax(5)
11 — ​2 — 
Total Other comprehensive income12 — ​5 — 
Balance at end of period$1 $— ​$1 $— 
Accumulated other comprehensive (loss) income$(1,768)$310 ​$(1,768)$310 
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(1)These amounts were included in the non-service component of net periodic benefit cost for pension and other postretirement benefits (see Note G). In the 2020 third quarter and nine-month period, these amounts include $3 and $58 related to the settlement of certain pension benefits (see Note G).
(2)These amounts were reported 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. In the 2020 nine-month period, the net amount reclassified to earnings was reported in Restructuring and other charges on the accompanying Statement of Consolidated Operations related to the sale of certain foreign subsidiaries.
(4)These amounts relate to aluminum contracts, a portion of which were reported in both Sales and Cost of goods sold on the accompanying Statement of Consolidated Operations.
(5)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 4.