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Stockholders' Equity Stockholders' Equity (Tables)
 12 Months Ended
Dec. 31, 2022
Stockholders' Equity Attributable to Parent [Abstract]  
Schedule of Stockholders Equity
Changes in common shares outstanding are as follows:
 Year ended December 31,
 202220212020
Beginning balance207,575,978 213,954,858 216,023,826 
Exercise of stock options2,475,550 1,806,940 321,465 
Issuance of restricted stock(1)
740,025 643,882 552,362 
Purchase of treasury shares(2)
(15,187,149)(8,829,702)(2,942,795)
Ending balance195,604,404 207,575,978 213,954,858 
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(1)Includes shares issued from treasury.
(2)Consists of shares repurchased under share repurchase programs and shares withheld to pay employee tax obligations upon the vesting of restricted stock or the exercise of stock options.
Schedule of Accumulated Other Comprehensive Income (Loss)
Changes to accumulated other comprehensive loss and the impact on other comprehensive income (loss) are as follows:
 Foreign
Currency
Translation
Adjustment		Unrealized
Gain (Loss)
on
Derivatives		Defined
Benefit
Plans		Accumulated
Other
Comprehensive
Loss
 (in millions)
Balance as of December 31, 2019$(188)$5 $(183)$(366)
Gain arising during the period— — 1 1 
Reclassification to earnings(1)
— (1)6 5 
Effect of exchange rate changes and deferred taxes44 — (4)40 
Balance as of December 31, 2020$(144)$4 $(180)$(320)
Gain arising during the period— — 67 67 
Reclassification to earnings(1)
— — 12 12 
Effect of exchange rate changes and deferred taxes3 — (19)(16)
Balance as of December 31, 2021$(141)$4 $(120)$(257)
Gain arising during the period— — 55 55 
Reclassification to earnings(1):
   Settlement loss— — 21 21 
   Curtailment gains— — (4)(4)
   Other— (1)4 3 
Effect of exchange rate changes and deferred taxes(38)— (10)(48)
Balance as of December 31, 2022$(179)$3 $(54)$(230)
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(1)     Reclassifications out of accumulated other comprehensive loss to the consolidated statements of operations were not material.