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Debt Obligations (Tables)
 9 Months Ended
Sep. 30, 2025
Debt Disclosure [Abstract]  
Long-term Debt Obligations
Quanta’s long-term debt obligations consisted of the following (in thousands):
September 30, 2025December 31, 2024
4.75% Senior Notes due August 2027
$600,000 $600,000 
4.30% Senior Notes due August 2028
500,000 — 
2.90% Senior Notes due October 2030
1,000,000 1,000,000 
4.50% Senior Notes due January 2031
500,000 — 
2.35% Senior Notes due January 2032
500,000 500,000 
5.25% Senior Notes due August 2034
650,000 650,000 
5.10% Senior Notes due August 2035
500,000 — 
3.05% Senior Notes due October 2041
500,000 500,000 
Borrowings under senior credit facility (including Term Loan)684,432 735,445 
Lease financing transactions188,756 155,549 
Other long-term debt3,039 4,939 
Finance leases46,059 47,993 
Unamortized discount and financing costs(42,683)(31,490)
Total long-term debt obligations5,629,603 4,162,436 
Less — Current maturities of long-term debt97,351 62,680 
Total long-term debt obligations, net of current maturities$5,532,252 $4,099,756 
Schedule of Interest on Senior Notes
The interest amounts due on Quanta’s senior notes on each payment date are set forth below (dollars in thousands):
Title of the NotesInterest AmountPayment DatesCommencement Date
4.75% Senior Notes due August 2027
$14,250 February 9 and August 9February 9, 2025
4.30% Senior Notes due August 2028
$10,750 February 9 and August 9February 9, 2026
2.90% Senior Notes due October 2030
$14,500 April 1 and October 1April 1, 2021
4.50% Senior Notes due January 2031
$11,250 January 15 and July 15January 15, 2026
2.35% Senior Notes due January 2032
$5,875 January 15 and July 15July 15, 2022
5.25% Senior Notes due August 2034
$17,063 February 9 and August 9February 9, 2025
5.10% Senior Notes due August 2035
$12,750 February 9 and August 9February 9, 2026
3.05% Senior Notes due October 2041
$7,625 April 1 and October 1April 1, 2022
Borrowings under Credit Facility and Applicable Interest Rates Borrowings under the senior credit facility and the applicable
interest rates were as follows (dollars in thousands):
Three Months EndedNine Months Ended
September 30,September 30,
2025202420252024
Maximum amount outstanding$1,444,375 $1,262,736 $1,444,375 $1,262,736 
Average daily amount outstanding$735,573 $978,939 $717,016 $897,753 
Weighted-average interest rate5.77 %6.71 %5.71 %6.75 %
Borrowings under the commercial paper program and the applicable interest rates were as follows (dollars in thousands):
Three Months EndedNine Months Ended
September 30,September 30,
2025202420252024
Maximum amount outstanding$1,500,000 $1,415,000 $1,500,000 $1,415,000 
Average daily amount outstanding $657,000 $456,212 $475,880 $325,171 
Weighted-average interest rate4.64 %5.15 %4.75 %5.50 %