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Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2025

Debt Disclosure [Abstract]

Schedule of long-term debt

Presented in the table below are the components of long-term debt as of December 31:

			Rate						Weighted Average Rate						Maturity						2025						2024
Long-term debt of AWCC: (a)
Senior notes—fixed rate			2.30%-8.27%						4.24%						2026-2055						$	12,961					$	11,786
Private activity bonds and government funded debt—fixed rate			0.00%-3.88%						3.07%						2028-2045						187						187
Long-term debt of other American Water subsidiaries:
Private activity bonds and government funded debt—fixed rate			0.00%-5.00%						2.41%						2026-2061						717						761
Mortgage bonds—fixed rate			6.35%-9.19%						7.37%						2026-2039						435						456
Mandatorily redeemable preferred stock			8.47%-9.75%						8.64%						2036						3						3
Long-term debt									4.23%												14,303						13,193
Unamortized debt discount, net (b)																					(27)						(20)
Unamortized debt issuance costs																					(17)						(15)
Less current portion of long-term debt																					(1,479)						(637)
Total long-term debt																					$	12,780					$	12,521

(a)This indebtedness is considered “debt” for purposes of a support agreement between parent company and AWCC, which serves as a functional equivalent of a full and unconditional guarantee by parent company of AWCC’s payment obligations under such indebtedness.

(b)Includes debt discount, net of fair value adjustments previously recognized in acquisition purchase accounting.

Schedule of future sinking fund payments and debt maturities

Presented in the table below are future sinking fund payments and debt maturities:

			Amount
2026			$	1,479
2027			646
2028			869
2029			938
2030			517
Thereafter			9,854

Schedule of long-term debt issued

Presented in the table below are the issuances of long-term debt in 2025:

Company						Type						Rate						Weighted Average Rate						Maturity						Amount
AWCC						Senior notes—fixed rate						5.25%						5.25%						2035						$	800
AWCC						Senior notes—fixed rate						5.70%						5.70%						2055						900
Other American Water subsidiaries						Private activity bonds and government funded debt—fixed rate						0.00%-3.71%						2.30%						2028-2057						89
Total issuances																														$	1,789

Schedule of long-term debt retired through optional redemptions or payments at maturities

Presented in the table below are the retirements and redemptions of long-term debt in 2025 through sinking fund provisions, optional redemption, payment at maturity or settlement:

Company						Type						Rate						Weighted Average Rate						Maturity						Amount
AWCC						Senior notes—fixed rate						3.40%						3.40%						2025						$	525
Other American Water subsidiaries						Private activity bonds and government funded debt—fixed rate						0.00%-5.00%						0.37%						2025-2061						145
Other American Water subsidiaries						Mortgage bonds—fixed rate						8.15%-8.58%						8.23%						2025						21
Total retirements and redemptions																														$	691

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