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Financing arrangements
 3 Months Ended
Mar. 31, 2021
Debt Disclosure [Abstract]  
Financing arrangements Financing arrangements
Our borrowings consisted of the following (in millions):
 March 31, 2021December 31, 2020
1.25% €1,250 million notes due 2022 (1.25% 2022 euro Notes)
$1,466 $1,527 
2.70% notes due 2022 (2.70% 2022 Notes)
500 500 
2.65% notes due 2022 (2.65% 2022 Notes)
1,500 1,500 
3.625% notes due 2022 (3.625% 2022 Notes)
750 750 
0.41% CHF700 million bonds due 2023 (0.41% 2023 Swiss franc Bonds)
742 791 
2.25% notes due 2023 (2.25% 2023 Notes)
750 750 
3.625% notes due 2024 (3.625% 2024 Notes)
1,400 1,400 
1.90% notes due 2025 (1.90% 2025 Notes)
500 500 
3.125% notes due 2025 (3.125% 2025 Notes)
1,000 1,000 
2.00% €750 million notes due 2026 (2.00% 2026 euro Notes)
880 916 
2.60% notes due 2026 (2.60% 2026 Notes)
1,250 1,250 
5.50% £475 million notes due 2026 (5.50% 2026 pound sterling Notes)
655 649 
2.20% notes due 2027 (2.20% 2027 Notes)
1,750 1,750 
3.20% notes due 2027 (3.20% 2027 Notes)
1,000 1,000 
4.00% £700 million notes due 2029 (4.00% 2029 pound sterling Notes)
965 957 
2.45% notes due 2030 (2.45% 2030 Notes)
1,250 1,250 
2.30% notes due 2031 (2.30% 2031 Notes)
1,250 1,250 
6.375% notes due 2037 (6.375% 2037 Notes)
478 478 
6.90% notes due 2038 (6.90% 2038 Notes)
254 254 
6.40% notes due 2039 (6.40% 2039 Notes)
333 333 
3.15% notes due 2040 (3.15% 2040 Notes)
2,000 2,000 
5.75% notes due 2040 (5.75% 2040 Notes)
373 373 
4.95% notes due 2041 (4.95% 2041 Notes)
600 600 
5.15% notes due 2041 (5.15% 2041 Notes)
729 729 
5.65% notes due 2042 (5.65% 2042 Notes)
415 415 
5.375% notes due 2043 (5.375% 2043 Notes)
185 185 
4.40% notes due 2045 (4.40% 2045 Notes)
2,250 2,250 
4.563% notes due 2048 (4.563% 2048 Notes)
1,415 1,415 
3.375% notes due 2050 (3.375% 2050 Notes)
2,250 2,250 
4.663% notes due 2051 (4.663% 2051 Notes)
3,541 3,541 
2.77% notes due 2053 (2.77% 2053 Notes)
940 940 
Other notes due 2097100 100 
Unamortized bond discounts, premiums and issuance costs, net(1,182)(1,188)
Fair value adjustments391 566 
Other5 5 
Total carrying value of debt32,685 32,986 
Less current portion(1,556)(91)
Total long-term debt$31,129 $32,895 
There are no material differences between the effective interest rates and coupon rates of any of our borrowings, except for the 4.563% 2048 Notes, the 4.663% 2051 Notes and the 2.77% 2053 Notes, which have effective interest rates of 6.3%, 5.6% and 5.2%, respectively.