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Accumulated Other Comprehensive Loss (Tables)
12 Months Ended
Dec. 31, 2021
Stockholders' Equity Note [Abstract]  
Summary of Accumulated Other Comprehensive Income (Loss)
Changes in AOCL, net of tax, by component
Dollars in millionsAccumulated foreign currency translation adjustmentsAccumulated pension liability adjustmentsChanges in fair value of derivativesTotal
Balance at December 31, 2019$(315)$(654)$(18)$(987)
   Other comprehensive income (loss) adjustments before reclassifications36 (130)(21)(115)
   Amounts reclassified from AOCL
(12)20 11 19 
Net other comprehensive income (loss)24 (110)(10)(96)
Balance at December 31, 2020$(291)$(764)$(28)$(1,083)
   Other comprehensive income (loss) adjustments before reclassifications(11)168 12 169 
   Amounts reclassified from AOCL
15 12 33 
Net other comprehensive income (loss)(5)183 24 202 
Balance at December 31, 2021$(296)$(581)$(4)$(881)
Reclassification out of Accumulated Other Comprehensive Income
Reclassifications out of AOCL, net of tax, by component
Dollars in millionsDecember 31, 2021December 31, 2020Affected line item on the Consolidated Statements of Operations
Accumulated foreign currency adjustments
    Reclassification of foreign currency adjustments$(6)$12 Net income attributable to noncontrolling interests and Gain on disposition of assets and investments
Tax benefit
— — Provision for income taxes
Net accumulated foreign currency
$(6)$12 
Accumulated pension liability adjustments
    Amortization of actuarial loss (a)$(32)$(24)See (a) below
Tax benefit
17 Provision for income taxes
Net pension and post-retirement benefits
$(15)$(20)Net of tax
Changes in fair value for derivatives
   Foreign currency hedge and interest rate swap settlements
$(16)$(13)Other non-operating income (expense)
Tax benefit
Provision for income taxes
Net changes in fair value of derivatives
$(12)$(11)Net of tax
(a)This item is included in the computation of net periodic pension cost. See Note 11 to our consolidated financial statements for further discussion.
Shares of Common Stock
Shares of common stock
Shares in millions Shares
Balance at December 31, 2019178.3 
Common stock issued0.8 
Balance at December 31, 2020179.1 
Common stock issued0.9 
Balance at December 31, 2021180.0 
Shares of Treasury Stock
Shares of treasury stock
Shares and dollars in millionsSharesAmount
Balance at December 31, 201936.5 $817 
Treasury stock acquired, net of ESPP shares issued1.8 47 
Balance at December 31, 202038.3 864 
Treasury stock acquired, net of ESPP shares issued1.9 79 
Balance at December 31, 202140.2 $943 
The table below presents information on our annual share repurchases activity under these programs:
Year Ended December 31, 2021
Number of SharesAverage Price per ShareDollars in Millions
Repurchases under the $350 million authorized share repurchase program
1,874,343 $41.52 $78 
Withheld to cover shares148,535 32.39 
Total2,022,878 $40.85 $82 
Year ending December 31, 2020
Number of SharesAverage Price per ShareDollars in Millions
Repurchases under the $350 million authorized share repurchase program
1,823,434 $25.70 $47 
Withheld to cover shares168,671 25.65 
Total1,992,105 $25.70 $51