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Contingencies and Commitments (Tables)
 12 Months Ended
Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]  
Lease, Cost
20212020
Right-of-use assets $419 $423 
Lease liabilities, current $112 $109 
Lease liabilities, noncurrent $310 $325 
Other information:
Weighted-average remaining lease term 5.4 years5.6 years
Weighted-average discount rate2.86 %2.57 %
Future Purchase Obligations and Minimum Lease Payments
20222023202420252026Thereafter
Debt repayments$7 $1,226 $1,564 $1,400 $1,000 $7,392 
Purchase obligations$1,889 $69 $54 $46 $49 $— 
Minimum lease payments$112 $86 $60 $38 $34 $72