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Stockholders' Equity
 12 Months Ended
Dec. 31, 2021
Equity [Abstract]  
Stockholders' Equity Stockholders’ Equity
Common Stock

Common Stock is reported net of shares held by our consolidated subsidiaries (Treasury Shares). Treasury Shares at December 31, 2021 and 2020 amounted to 20,320,777, with a cost of $19 million at both dates.   

Accumulated Other Comprehensive Loss

The components of “Other comprehensive income (loss)” reported in the Consolidated Statements of Comprehensive Income and changes in the cumulative balances of “Accumulated other comprehensive loss” reported in the Consolidated Balance Sheets consisted of the following:

Balance
at Beginning
of Year		Net Income
(Loss)		Reclassification
Adjustments		Balance
at End
of Year
 ($ in millions)    
Year ended December 31, 2021    
Pensions and other postretirement liabilities$(526)$139 $31 $(356)
Other comprehensive income of equity investees(68)22 — (46)
Accumulated other comprehensive loss$(594)$161 $31 $(402)
Year ended December 31, 2020    
Pensions and other postretirement liabilities$(421)$(125)$20 $(526)
Other comprehensive income of equity investees(70)2 — (68)
Accumulated other comprehensive loss$(491)$(123)$20 $(594)
Other Comprehensive Income (Loss)
 
“Other comprehensive income (loss)” reported in the Consolidated Statements of Comprehensive Income consisted of the following:

Pretax
Amount		Tax
(Expense)
Benefit		Net-of-Tax
Amount
 ($ in millions)
Year ended December 31, 2021   
Net gain arising during the year:   
  Pensions and other postretirement benefits$185 $(46)$139 
Reclassification adjustments for costs included in net income41 (10)31 
       Subtotal226 (56)170 
Other comprehensive income of equity investees24 (2)22 
Other comprehensive income$250 $(58)$192 
Year ended December 31, 2020   
Net loss arising during the year:   
  Pensions and other postretirement benefits$(167)$42 $(125)
Reclassification adjustments for costs included in net income27 (7)20 
       Subtotal(140)35 (105)
Other comprehensive income of equity investees2 — 2 
Other comprehensive loss$(138)$35 $(103)
Year ended December 31, 2019   
Net gain arising during the year:   
  Pensions and other postretirement benefits$81 $(20)$61 
Reclassification adjustments for costs included in net income20 (5)15 
       Subtotal101 (25)76 
Other comprehensive loss of equity investees(4)— (4)
Other comprehensive income$97 $(25)$72