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Debt and lines of credit - Schedule of Long-term Debt Outstanding (Details) - USD ($) $ in Millions | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Debt Instrument [Line Items] |  |
Total debt | $ 6,300 | $ 6,850
Net unamortized discounts, premiums and issuance costs | (50) | (52)
Total debt, including net unamortized discounts, premiums and issuance costs | 6,250 | 6,798
Current portion of long-term debt | 0 | (550)
Long-term debt | $ 6,250 | 6,248
Notes due 2021 at 2.75% |  |
Debt Instrument [Line Items] |  |
Long-term debt stated interest rate (in percentage) | 2.75% |
Total debt | $ 0 | 550
Notes due 2022 at 1.85% |  |
Debt Instrument [Line Items] |  |
Long-term debt stated interest rate (in percentage) | 1.85% |
Total debt | $ 500 | 500
Notes due 2023 at 2.25% |  |
Debt Instrument [Line Items] |  |
Long-term debt stated interest rate (in percentage) | 2.25% |
Total debt | $ 500 | 500
Notes due 2024 at 2.625% |  |
Debt Instrument [Line Items] |  |
Long-term debt stated interest rate (in percentage) | 2.625% |
Total debt | $ 300 | 300
Notes due 2025 at 1.375% |  |
Debt Instrument [Line Items] |  |
Long-term debt stated interest rate (in percentage) | 1.375% |
Total debt | $ 750 | 750
Notes due 2027 at 2.90% |  |
Debt Instrument [Line Items] |  |
Long-term debt stated interest rate (in percentage) | 2.90% |
Total debt | $ 500 | 500
Notes due 2029 at 2.25% |  |
Debt Instrument [Line Items] |  |
Long-term debt stated interest rate (in percentage) | 2.25% |
Total debt | $ 750 | 750
Notes due 2030 at 1.75% |  |
Debt Instrument [Line Items] |  |
Long-term debt stated interest rate (in percentage) | 1.75% |
Total debt | $ 750 | 750
Notes due 2039 at 3.875% |  |
Debt Instrument [Line Items] |  |
Long-term debt stated interest rate (in percentage) | 3.875% |
Total debt | $ 750 | 750
Notes due 2048 at 4.15% |  |
Debt Instrument [Line Items] |  |
Long-term debt stated interest rate (in percentage) | 4.15% |
Total debt | $ 1,500 | $ 1,500

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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
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