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Summary of Significant Accounting Policies - Estimated Retail Value of Promotional Allowances (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Promotional Allowances, Estimated Retail Value [Line Items]      
Promotional allowances $ 841,939us-gaap_PromotionalAllowances $ 724,551us-gaap_PromotionalAllowances $ 553,537us-gaap_PromotionalAllowances
Rooms [Member]      
Promotional Allowances, Estimated Retail Value [Line Items]      
Promotional allowances 463,920us-gaap_PromotionalAllowances
/ us-gaap_ProductOrServiceAxis
= us-gaap_HotelMember		 366,353us-gaap_PromotionalAllowances
/ us-gaap_ProductOrServiceAxis
= us-gaap_HotelMember		 256,738us-gaap_PromotionalAllowances
/ us-gaap_ProductOrServiceAxis
= us-gaap_HotelMember
Food and Beverage [Member]      
Promotional Allowances, Estimated Retail Value [Line Items]      
Promotional allowances 243,605us-gaap_PromotionalAllowances
/ us-gaap_ProductOrServiceAxis
= lvs_FoodAndBeverageMember		 222,195us-gaap_PromotionalAllowances
/ us-gaap_ProductOrServiceAxis
= lvs_FoodAndBeverageMember		 185,292us-gaap_PromotionalAllowances
/ us-gaap_ProductOrServiceAxis
= lvs_FoodAndBeverageMember
Convention, Retail and Other [Member]      
Promotional Allowances, Estimated Retail Value [Line Items]      
Promotional allowances $ 134,414us-gaap_PromotionalAllowances
/ us-gaap_ProductOrServiceAxis
= lvs_ConventionRetailAndOtherMember		 $ 136,003us-gaap_PromotionalAllowances
/ us-gaap_ProductOrServiceAxis
= lvs_ConventionRetailAndOtherMember		 $ 111,507us-gaap_PromotionalAllowances
/ us-gaap_ProductOrServiceAxis
= lvs_ConventionRetailAndOtherMember