Commitments and Contingencies - Additional Information (Details) € in Millions	3 Months Ended		6 Months Ended	12 Months Ended
	Jun. 30, 2025 USD ($) Vessel Berth	Mar. 31, 2025 Vessel	Jun. 30, 2025 USD ($) Vessel Berth	Dec. 31, 2024 USD ($) EuroUsd	Dec. 31, 2023 USD ($) Berth Vessel	Dec. 31, 2022	Dec. 31, 2021	Jun. 30, 2025 EUR (€) Rate m³	Dec. 31, 2023 EUR (€)
Disclosure of commitments and contingencies [line items]
Number of vessels			84
Loan amount \| €								€ 167.5
Loan agreements, term, description			The loan has a term of 102 months from the date of drawdown
Export credit agency premium percentage						100.00%	100.00%
Contractual payments for the initial term of nine seasons \| $				$ 23,000,000	$ 24,900,000
SACE Financing
Disclosure of commitments and contingencies [line items]
Maximum percentage of newbuild"s contract price			80.00%
Hermes
Disclosure of commitments and contingencies [line items]
Percentage of guarantee					95.00%
Loan Agreements
Disclosure of commitments and contingencies [line items]
Loan amount \| €									€ 167.5
Loan Agreements \| SACE Financing
Disclosure of commitments and contingencies [line items]
Maximum percentage of newbuild"s contract price						80.00%	80.00%
Lease Agreement for Buildings and Docking
Disclosure of commitments and contingencies [line items]
Initial lease term				13 years
Additional lease term				10 years
Euro to USD exchange rate \| EuroUsd				1.15
Contracts for Portion of River Fuel Usage in Europe for 2025 and 2026 Seasons
Disclosure of commitments and contingencies [line items]
Remaining portions of contracts for river fuel usage \| m³								57,000
Contracts for Portion of River Fuel Usage in Europe for 2025 and 2026 Seasons \| Minimum
Disclosure of commitments and contingencies [line items]
Fixed contract prices per 100 liters excluding taxes \| $			$ 60.3
Contracts for Portion of River Fuel Usage in Europe for 2025 and 2026 Seasons \| Maximum
Disclosure of commitments and contingencies [line items]
Fixed contract prices per 100 liters excluding taxes \| $			$ 81.3
Delivery in 2025 \| Charter Agreement for Viking Tonle
Disclosure of commitments and contingencies [line items]
Scheduled delivery period					2025
Ship Building Contract
Disclosure of commitments and contingencies [line items]
Exchange rate \| Rate								1.15
Longships \| Delivery in 2026
Disclosure of commitments and contingencies [line items]
Scheduled delivery period					2026
Longship-Seine \| Delivery in 2025
Disclosure of commitments and contingencies [line items]
Scheduled delivery period					2025
First Vessel \| Charter Agreement
Disclosure of commitments and contingencies [line items]
Contractual payments for the initial term of nine seasons \| $	$ 29,200,000
Second Vessel \| Charter Agreement
Disclosure of commitments and contingencies [line items]
Contractual payments for the initial term of nine seasons \| $	$ 29,800,000
River Vessels
Disclosure of commitments and contingencies [line items]
Number of vessels			19
River Vessels \| Charter Agreement for Viking Tonle
Disclosure of commitments and contingencies [line items]
Number of berths \| Berth					80
River Vessels \| Charter Agreement
Disclosure of commitments and contingencies [line items]
Number of vessels	2
Number of berths \| Berth	80
River Vessels \| Delivery Between 2025 and 2027
Disclosure of commitments and contingencies [line items]
Number of river vessels build			6
Number of additional vessels			2
River Vessels \| Longship-Douro
Disclosure of commitments and contingencies [line items]
Number of vessels			1
River Vessels \| Longships
Disclosure of commitments and contingencies [line items]
Number of vessels			3
Number of river vessels scheduled for delivery					4
River Vessels \| Longships
Disclosure of commitments and contingencies [line items]
Number of vessels			5
River Vessels \| Longship-Seine
Disclosure of commitments and contingencies [line items]
Number of vessels			1
Number of river vessels scheduled for delivery					1
Viking New Building Program \| Ship Building Contract
Disclosure of commitments and contingencies [line items]
Exchange rate \| Rate								1.15
Viking New Building Program \| River Vessels \| Longship-Douro \| Ship Building Contract \| Delivery in 2027
Disclosure of commitments and contingencies [line items]
Number of vessels		1
Delivery period		2027
Viking New Building Program \| River Vessels \| Longships \| Ship Building Contract \| Delivery in 2027
Disclosure of commitments and contingencies [line items]
Number of vessels		4
Delivery period		2027
Viking New Building Program \| River Vessels \| Longships \| Ship Building Contract \| Delivery in 2028
Disclosure of commitments and contingencies [line items]
Number of vessels		4
Delivery period		2028
Ocean Newbuilding Program
Disclosure of commitments and contingencies [line items]
Exchange rate \| Rate								1.15
Number of berths \| Berth			998