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Debt and lines of credit
 6 Months Ended
Jun. 30, 2024
Debt Disclosure [Abstract]  
Debt and lines of credit Debt and lines of credit
Short-term borrowings
We maintain a line of credit to provide additional liquidity through bank loans and, if necessary, to support commercial paper borrowings. As of June 30, 2024, the aforementioned line of credit was a variable-rate, revolving credit facility from a consortium of investment-grade banks that allows us to borrow up to $1 billion until March 2025. The interest rate on borrowings under this credit facility, if drawn, is indexed to the applicable Term Secured Overnight Financing Rate (Term SOFR). As of June 30, 2024, our credit facility was undrawn, and we had no commercial paper outstanding.
Long-term debt
In May 2024, we retired $300 million of maturing debt.
In February 2024, we issued five series of senior unsecured notes for an aggregate principal amount of $3.00 billion, consisting of:
•$650 million of 4.60% notes due in 2027;
•$650 million of 4.60% notes due in 2029;
•$600 million of 4.85% notes due in 2034;
•$750 million of 5.15% notes due in 2054; and
•$350 million further issuance of existing 5.05% notes due in 2063.
We incurred $16 million of issuance and other related costs. The proceeds of the offering were $2.98 billion, net of the original issuance discounts, which will be used for general corporate purposes.
Long-term debt outstanding is as follows:
June 30,December 31,
20242023
Notes due 2024 at 2.625%
$— $300 
Notes due 2024 at 4.70%
300 300 
Notes due 2025 at 1.375%
750 750 
Notes due 2026 at 1.125%
500 500 
Notes due 2027 at 4.60%
650 — 
Notes due 2027 at 2.90%
500 500 
Notes due 2028 at 4.60%
700 700 
Notes due 2029 at 4.60%
650 — 
Notes due 2029 at 2.25%
750 750 
Notes due 2030 at 1.75%
750 750 
Notes due 2031 at 1.90%
500 500 
Notes due 2032 at 3.65%
400 400 
Notes due 2033 at 4.90%
950 950 
Notes due 2034 at 4.85%
600 — 
Notes due 2039 at 3.875%
750 750 
Notes due 2048 at 4.15%
1,500 1,500 
Notes due 2051 at 2.70%
500 500 
Notes due 2052 at 4.10%
300 300 
Notes due 2053 at 5.00%
650 650 
Notes due 2054 at 5.15%
750 — 
Notes due 2063 at 5.05%
1,550 1,200 
Total debt14,000 11,300 
Net unamortized discounts, premiums and issuance costs(109)(77)
Total debt, including net unamortized discounts, premiums and issuance costs13,891 11,223 
Current portion of long-term debt(1,049)(599)
Long-term debt$12,842 $10,624 
Interest and debt expense was $131 million and $89 million for the second quarters of 2024 and 2023, respectively, and $247 million and $157 million for the first six months of 2024 and 2023, respectively. This was net of the amortized discounts, premiums, issuance and other related costs. Capitalized interest was $5 million and $3 million for the second quarters of 2024 and 2023, respectively, and $11 million and $5 million for the first six months of 2024 and 2023, respectively.