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Debt (Tables)
 12 Months Ended
Dec. 31, 2021
Debt Disclosure [Abstract]  
Schedule of 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 
Schedule of Principal Maturities of Debt
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