| USD ($) $ in Millions | Jun 30, 2026 | Mar 31, 2026 | Sep 30, 2025 | Jun 30, 2025 | Mar 31, 2025 | Sep 30, 2024 | Jun 30, 2024 | Mar 31, 2024 | Sep 30, 2023 | Jun 30, 2023 | Mar 31, 2023 | Sep 30, 2022 | Jun 30, 2022 | Mar 31, 2022 | Sep 30, 2021 | Jun 30, 2021 | Mar 31, 2021 | Sep 30, 2020 | Jun 30, 2020 | Mar 31, 2020 | Sep 30, 2019 | Jun 30, 2019 | Mar 31, 2019 | Sep 30, 2018 | Jun 30, 2018 | Mar 31, 2018 | Sep 30, 2017 | Jun 30, 2017 | Mar 31, 2017 | Sep 30, 2016 | Jun 30, 2016 | Mar 31, 2016 | Sep 30, 2015 | Jun 30, 2015 | Mar 31, 2015 | Sep 30, 2014 | Jun 30, 2014 | Mar 31, 2014 | Sep 30, 2013 | Jun 30, 2013 | Mar 31, 2013 | Sep 30, 2012 | Jun 30, 2012 | Mar 31, 2012 | Sep 30, 2011 | Jun 30, 2011 | Mar 31, 2011 | Sep 30, 2010 | Jun 30, 2010 | Mar 31, 2010 | Sep 30, 2009 | Jun 30, 2009 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Current Assets: | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Cash and cash equivalents | $ 4,729.4 | $ 4,128.0 | $ 3,799.3 | $ 3,207.0 | $ 1,657.2 | $ 1,563.0 | $ 1,252.5 | $ 1,857.1 | $ 1,481.5 | $ 1,325.1 | $ 1,391.1 | $ 1,189.0 | ||||||||||||||||||||||||||||||||||||||||
Short-term investments | 689.7 | 455.1 | 88.8 | 19.4 | 14.5 | 20.3 | 49.7 | 106.4 | 252.5 | 177.9 | 107.6 | 63.0 | ||||||||||||||||||||||||||||||||||||||||
Total cash, cash equivalents and short-term investments | 5,419.1 | 4,583.1 | 3,888.1 | 3,226.4 | 1,671.7 | 1,583.3 | 1,302.2 | 1,963.5 | 1,734.0 | 1,503.0 | 1,498.7 | 1,252.0 | ||||||||||||||||||||||||||||||||||||||||
Accounts receivable, less allowance for doubtful accounts of $98.1 and $99.3, respectively | 6,790.1 | 5,872.9 | 4,543.8 | 4,270.9 | 3,920.3 | 3,130.3 | 2,855.5 | 2,501.4 | 2,571.2 | 2,443.5 | 2,411.9 | 2,640.1 | ||||||||||||||||||||||||||||||||||||||||
Inventories | 4,551.6 | 4,086.8 | 3,300.1 | 3,137.1 | 2,906.4 | 2,578.8 | 2,398.8 | 2,152.9 | 2,099.1 | 1,997.8 | 2,105.1 | 2,080.1 | ||||||||||||||||||||||||||||||||||||||||
Prepaid expenses and other current assets | 1,056.0 | 840.9 | 651.9 | 664.1 | 634.8 | 480.4 | 415.3 | 423.9 | 369.0 | 377.0 | 378.3 | 354.7 | ||||||||||||||||||||||||||||||||||||||||
Current assets held for sale | - | - | - | - | - | - | - | - | - | - | - | - | ||||||||||||||||||||||||||||||||||||||||
Other current assets | - | - | - | - | - | - | - | - | - | - | - | - | ||||||||||||||||||||||||||||||||||||||||
Total current assets | 17,816.8 | 15,383.7 | 12,383.9 | 11,298.5 | 9,133.2 | 7,772.8 | 6,971.8 | 7,041.7 | 6,773.3 | 6,321.3 | 6,394.0 | 6,326.9 | ||||||||||||||||||||||||||||||||||||||||
Property, plant and equipment, less accumulated depreciation of $3,473.3 and $3,096.0, respectively | 2,932.2 | 2,688.6 | 2,141.5 | 2,053.9 | 1,854.9 | 1,670.9 | 1,534.0 | 1,311.6 | 1,246.6 | 1,258.9 | 1,243.5 | 1,166.9 | ||||||||||||||||||||||||||||||||||||||||
Goodwill | 17,554.7 | 17,542.9 | 9,868.6 | 9,651.3 | 9,274.3 | 8,352.1 | 8,261.8 | 7,100.5 | 6,574.5 | 6,518.6 | 6,539.6 | 6,337.5 | ||||||||||||||||||||||||||||||||||||||||
Other intangible assets, net | 5,288.9 | 5,401.1 | 1,982.3 | 1,989.4 | 2,001.5 | 1,247.0 | 1,308.7 | 785.4 | 744.2 | 723.5 | 743.2 | 753.8 | ||||||||||||||||||||||||||||||||||||||||
Other long-term assets | 1,214.0 | 1,117.5 | 766.7 | 675.3 | 638.2 | 542.8 | 510.5 | 483.3 | 420.4 | 415.6 | 461.2 | 512.8 | ||||||||||||||||||||||||||||||||||||||||
Intangibles, net and other long-term assets | - | - | - | - | - | - | - | - | - | - | - | - | ||||||||||||||||||||||||||||||||||||||||
Goodwill and other long-term assets | - | - | - | - | - | - | - | - | - | - | - | - | ||||||||||||||||||||||||||||||||||||||||
Total Assets | 44,806.6 | 42,133.8 | 27,143.0 | 25,668.4 | 22,902.1 | 19,585.6 | 18,586.8 | 16,722.5 | 15,759.0 | 15,237.9 | 15,381.5 | 15,097.9 | ||||||||||||||||||||||||||||||||||||||||
LIABILITIES, REDEEMABLE NONCONTROLLING INTERESTS AND EQUITY | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Current Liabilities: | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Accounts payable | 4,009.1 | 3,181.5 | 2,462.4 | 2,373.0 | 2,142.4 | 1,763.0 | 1,521.4 | 1,264.7 | 1,248.9 | 1,116.8 | 1,182.1 | 1,393.6 | ||||||||||||||||||||||||||||||||||||||||
Accrued salaries, wages and employee benefits | 874.8 | 675.5 | 688.6 | 603.4 | 474.7 | 480.2 | 423.2 | 351.2 | 360.9 | 336.4 | 305.8 | 369.0 | ||||||||||||||||||||||||||||||||||||||||
Accrued income taxes | 351.0 | 656.9 | 252.9 | 192.8 | 260.1 | 124.4 | 104.3 | 150.9 | 113.6 | 100.1 | 144.6 | 124.5 | ||||||||||||||||||||||||||||||||||||||||
Accrued dividends | 308.0 | 307.4 | 201.9 | 201.2 | 199.6 | 198.9 | 132.4 | 132.1 | 125.6 | 125.1 | 125.0 | 119.0 | ||||||||||||||||||||||||||||||||||||||||
Accrued acquisition-related obligations | - | - | - | - | - | - | - | - | - | - | - | - | ||||||||||||||||||||||||||||||||||||||||
Other accrued expenses | 2,260.8 | 2,043.8 | 1,440.5 | 1,297.2 | 1,163.4 | 932.1 | 870.4 | 771.7 | 704.2 | 679.5 | 665.8 | 645.9 | ||||||||||||||||||||||||||||||||||||||||
Current portion of long-term debt | 1,634.3 | 2,109.6 | 937.6 | 936.6 | 350.8 | 403.1 | 404.1 | 752.5 | 355.6 | 351.8 | 2.9 | 2.9 | ||||||||||||||||||||||||||||||||||||||||
Current liabilities held for sale | - | - | - | - | - | - | - | - | - | - | - | - | ||||||||||||||||||||||||||||||||||||||||
Total current liabilities | 9,438.0 | 8,974.7 | 5,983.9 | 5,604.2 | 4,591.0 | 3,901.7 | 3,455.8 | 3,423.1 | 2,908.8 | 2,709.7 | 2,426.2 | 2,654.9 | ||||||||||||||||||||||||||||||||||||||||
Long-term debt, less current portion | 17,177.0 | 16,639.3 | 7,129.5 | 7,125.8 | 6,816.1 | 5,081.0 | 5,035.3 | 3,556.9 | 3,936.4 | 3,967.4 | 4,561.0 | 4,750.3 | ||||||||||||||||||||||||||||||||||||||||
Accrued pension and postretirement benefit obligations | 158.9 | 153.6 | 150.2 | 148.6 | 133.7 | 147.4 | 141.4 | 142.1 | 129.1 | 132.9 | 131.5 | 165.3 | ||||||||||||||||||||||||||||||||||||||||
Deferred income taxes | 1,381.1 | 1,270.1 | 377.6 | 368.6 | 386.8 | 439.7 | 445.7 | 371.0 | 413.0 | 407.3 | 412.1 | 442.4 | ||||||||||||||||||||||||||||||||||||||||
Other long-term liabilities | 1,029.5 | 1,004.6 | 894.9 | 821.5 | 602.1 | 489.0 | 458.1 | 464.8 | 433.4 | 428.3 | 464.2 | 436.1 | ||||||||||||||||||||||||||||||||||||||||
Total Liabilities | 29,184.5 | 28,042.3 | 14,536.1 | 14,068.7 | 12,529.7 | 10,058.8 | 9,536.3 | 7,957.9 | 7,820.7 | 7,645.6 | 7,995.0 | 8,449.0 | ||||||||||||||||||||||||||||||||||||||||
Redeemable noncontrolling interests | 9.0 | 9.1 | 10.2 | 10.1 | 9.3 | 20.7 | 19.9 | 30.9 | 21.8 | 21.4 | 20.9 | 20.2 | ||||||||||||||||||||||||||||||||||||||||
Accrued pension benefit obligations and other long-term liabilities | - | - | - | - | - | - | - | - | - | - | - | - | ||||||||||||||||||||||||||||||||||||||||
Equity: | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Equity: | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Common stock | 1.2 | 1.2 | 1.2 | 1.2 | 1.2 | 1.2 | 1.2 | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | ||||||||||||||||||||||||||||||||||||||||
Additional paid-in capital | 4,505.7 | 4,347.4 | 4,092.7 | 3,957.7 | 3,672.2 | 3,457.6 | 3,349.2 | 3,224.1 | 3,015.0 | 2,860.4 | 2,748.5 | 2,565.1 | ||||||||||||||||||||||||||||||||||||||||
Retained earnings | 11,644.9 | 10,432.1 | 9,155.0 | 8,135.2 | 7,445.9 | 6,750.5 | 6,352.0 | 6,163.5 | 5,669.7 | 5,294.8 | 5,121.3 | 4,775.1 | ||||||||||||||||||||||||||||||||||||||||
Treasury stock, at cost | (256.0) | (310.0) | (220.9) | (104.9) | (174.0) | (236.9) | (73.8) | (103.8) | (170.6) | (49.6) | (69.7) | (97.5) | ||||||||||||||||||||||||||||||||||||||||
Accumulated other comprehensive loss | (404.2) | (493.9) | (507.7) | (469.9) | (644.1) | (519.9) | (648.5) | (602.9) | (657.9) | (592.5) | (492.6) | (672.4) | ||||||||||||||||||||||||||||||||||||||||
Total stockholders' equity attributable to Amphenol Corporation | 15,491.6 | 13,976.8 | 12,520.3 | 11,519.3 | 10,301.2 | 9,452.5 | 8,980.1 | 8,681.5 | 7,856.8 | 7,513.7 | 7,308.1 | 6,570.9 | ||||||||||||||||||||||||||||||||||||||||
Noncontrolling interests | 121.5 | 105.6 | 76.4 | 70.3 | 61.9 | 53.6 | 50.5 | 52.2 | 59.7 | 57.2 | 57.5 | 57.8 | ||||||||||||||||||||||||||||||||||||||||
Total Equity | 15,613.1 | 14,082.4 | 12,596.7 | 11,589.6 | 10,363.1 | 9,506.1 | 9,030.6 | 8,733.7 | 7,916.5 | 7,570.9 | 7,365.6 | 6,628.7 | ||||||||||||||||||||||||||||||||||||||||
Total Liabilities, Redeemable Noncontrolling Interests and Equity | $ 44,806.6 | $ 42,133.8 | $ 27,143.0 | $ 25,668.4 | $ 22,902.1 | $ 19,585.6 | $ 18,586.8 | $ 16,722.5 | $ 15,759.0 | $ 15,237.9 | $ 15,381.5 | $ 15,097.9 |