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Debt
 12 Months Ended
Dec. 31, 2021
Debt Disclosure [Abstract]  
Debt DEBT
Debt consisted of the following:
December 3120212020
Fixed-rate notes due:Interest rate:
May 20213.000%$— $2,000 
July 20213.875%— 500 
November 20222.250%1,000 1,000 
May 20233.375%750 750 
August 20231.875%500 500 
November 20242.375%500 500 
April 20253.250%750 750 
May 20253.500%750 750 
June 20261.150%500 — 
August 20262.125%500 500 
April 20273.500%750 750 
November 20272.625%500 500 
May 20283.750%1,000 1,000 
April 20303.625%1,000 1,000 
June 20312.250%500 — 
April 20404.250%750 750 
June 20412.850%500 — 
November 20423.600%500 500 
April 20504.250%750 750 
Floating-rate notes due:
May 2021
3-month LIBOR + 0.38%
— 500 
OtherVarious106 117 
Total debt principal11,606 13,117 
Less unamortized debt issuance costs and discounts111 119 
Total debt11,495 12,998 
Less current portion1,005 3,003 
Long-term debt$10,490 $9,995 
In May 2021, we issued $1.5 billion of fixed-rate notes. The proceeds, together with cash on hand and commercial paper issuances, were used to repay fixed- and floating-rate notes totaling $2.5 billion that matured in May 2021 and for general corporate purposes. In July 2021, we repaid an additional $500 of fixed-rate notes at the scheduled maturity.
Interest payments associated with our debt were $433 in 2021, $459 in 2020 and $434 in 2019.
The aggregate amounts of scheduled principal maturities of our debt are as follows:
Year Ended December 31Debt
Principal
2022$1,006 
20231,255 
2024505 
20251,503 
20261,004 
Thereafter6,333 
Total debt principal$11,606 
On December 31, 2021, we had no commercial paper outstanding, but we maintain the ability to access the commercial paper market in the future. Separately, we have $5 billion in committed bank credit facilities for general corporate purposes and working capital needs and to support our commercial paper issuances. These credit facilities include a $2 billion 364-day facility expiring in March 2022, a $2 billion multi-year facility expiring in March 2023 and a $1 billion multi-year facility expiring in March 2025. We may renew or replace these credit facilities in whole or in part at or prior to their expiration dates. We also have an effective shelf registration on file with the Securities and Exchange Commission (SEC) that allows us to access the debt markets.
Our financing arrangements contain a number of customary covenants and restrictions. We were in compliance with all covenants and restrictions on December 31, 2021.