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Leases (Tables)
 12 Months Ended
Dec. 31, 2021
Leases [Abstract]  
Future Minimum Lease Commitments Future minimum lease commitments at December 31, 2021 were as follows (in millions):
Total20222023202420252026Thereafter
Operating leases$1,566 $325 $225 $196 $151 $108 $561 
Less: imputed interest140 
Total$1,426