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Accumulated Other Comprehensive Income (Loss) (AOCI) (Notes)
12 Months Ended
Dec. 31, 2020
Statement of Financial Position [Abstract]  
Accumulated Other Comprehensive Income (Loss) (AOCI)
14. ACCUMULATED OTHER COMPREHENSIVE INCOME

Changes in Accumulated Other Comprehensive Income (AOCI) by Component

The changes in AOCI for the years ended December 31 are as follows:
In millionsCurrency Translation AdjustmentsChanges in Employee Benefit PlansChanges in Fair Value of Effective Cash Flow HedgesTotal
Balance at December 31, 2017 $(183)$(15)$(1)$(199)
Impact of adoption of new accounting standard— — 
Other comprehensive (loss) income before reclassifications(51)11 (34)
Amounts reclassified from AOCI— (6)(8)(14)
Net current period other comprehensive (loss) income(51)— (48)
Balance at December 31, 2018$(234)$(14)$2 $(246)
Other comprehensive (loss) income before reclassifications(26)10 (11)
Amounts reclassified from AOCI— (6)(6)(12)
Net current period other comprehensive (loss) income(26)(1)(23)
Balance at December 31, 2019$(260)$(10)$1 $(269)
Other comprehensive (loss) income before reclassifications15 (11)(7)(3)
Amounts reclassified from AOCI— (5)
Net current period other comprehensive (loss) income15 (16)(1)(2)
Balance at December 31, 2020$(245)$(26)$ $(271)


Reclassifications Out of AOCI

The reclassifications out of AOCI for the years ended December 31 are as follows:
For the year ended December 31, 2020
Employee Benefit Plans
In millionsActuarial Losses RecognizedAmortization of Prior Service BenefitEffective Cash Flow HedgesTotal
Affected line in Consolidated Statement of Operations:
Cost of products$— $— $$7 
Cost of services(2)(2)— (4)
Selling, general and administrative expenses(1)(2)— (3)
Research and development expenses— — —  
Total before tax$(3)$(4)$$ 
Tax expense1 
Total reclassifications, net of tax$1 
For the year ended December 31, 2019
Employee Benefit Plans
In millionsActuarial Losses RecognizedAmortization of Prior Service BenefitEffective Cash Flow HedgesTotal
Affected line in Consolidated Statement of Operations:
Cost of products$— $— $(8)$(8)
Cost of services(2)(3)— (5)
Selling, general and administrative expenses(1)(3)— (4)
Research and development expenses— — — — 
Total before tax$(3)$(6)$(8)$(17)
Tax expense
Total reclassifications, net of tax$(12)
For the year ended December 31, 2018
Employee Benefit Plans
In millionsActuarial Losses RecognizedAmortization of Prior Service BenefitEffective Cash Flow HedgesTotal
Affected line in Consolidated Statement of Operations:
Cost of products$— $— $(7)$(7)
Cost of services— (5)— (5)
Selling, general and administrative expenses— (3)— (3)
Research and development expenses— (1)— (1)
Total before tax$— $(9)$(7)$(16)
Tax expense
Total reclassifications, net of tax$(14)