XML 68 R56.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Condensed Consolidating Financial Information (Income Statements) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016 | Jun. 30, 2017 | Dec. 31, 2016 | Jun. 30, 2016 | Dec. 31, 2015
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |
Net revenues | $ 587,665 | $ 531,901 | $ 1,792,875 | $ 1,629,153 |  |  |  |
Costs and Expenses |  |  |  |  |  |  |  |
Operating | 309,195 | 287,755 | 935,982 | 872,918 |  |  |  |
Impairments of assets | 0 | 0 | 0 | 1,440 |  |  |  |
Other operating items, net | 758 | 3 | 1,707 | 555 |  |  |  |
Intercompany Expense | 0 | 0 | 0 | 0 |  |  |  |
Costs and Expenses | 509,000 | 463,985 | 1,529,981 | 1,398,497 |  |  |  |
Equity in Earnings of Subsidiaries | 0 | 0 | 0 | 0 |  |  |  |
Operating income | 78,665 | 67,916 | 262,894 | 230,656 |  |  |  |
Selling, general and administrative | 91,288 | 80,833 | 275,938 | 241,686 |  |  |  |
Maintenance and utilities | 30,244 | 27,854 | 82,507 | 76,711 |  |  |  |
Depreciation and amortization | 55,201 | 47,928 | 161,728 | 143,831 |  |  |  |
Corporate expense | 19,339 | 15,877 | 63,388 | 49,883 |  |  |  |
Project development, preopening and writedowns | 2,975 | 3,735 | 8,731 | 11,473 |  |  |  |
Other expense (income) |  |  |  |  |  |  |  |
Interest expense, net | 42,857 | 54,153 | 128,344 | 167,649 |  |  |  |
Loss on early extinguishments and modifications of debt | 319 | 41,518 | 853 | 42,364 |  |  |  |
Other, net | (139) | 1 | 531 | 143 |  |  |  |
Total other expense, net | 43,037 | 95,672 | 129,728 | 210,156 |  |  |  |
Income (loss) before income taxes | 35,628 | (27,756) | 133,166 | 20,500 |  |  |  |
Income tax (provision) benefit | (12,652) | 189,620 | (47,515) | 174,231 |  |  |  |
Income (Loss) from Continuing Operations Attributable to Parent | 22,976 | 161,864 | 85,651 | 194,731 |  |  |  |
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent | 0 | 180,707 | 21,392 | 211,052 |  |  |  |
Net income | 22,976 | 342,571 | 107,043 | 405,783 |  |  |  |
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest | 22,671 | 342,988 | 107,844 | 406,537 |  |  |  |
Parent |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |
Net revenues | 17,827 | 29,708 | 55,027 | 91,901 |  |  |  |
Costs and Expenses |  |  |  |  |  |  |  |
Operating | 0 | 300 | 0 | 1,200 |  |  |  |
Impairments of assets |  |  |  | 1,440 |  |  |  |
Other operating items, net | 127 | 0 | 352 | 106 |  |  |  |
Intercompany Expense | 301 | 301 | 903 | 903 |  |  |  |
Costs and Expenses | 23,655 | 36,907 | 75,129 | 103,553 |  |  |  |
Equity in Earnings of Subsidiaries | 55,529 | 230,669 | 207,414 | 372,953 |  |  |  |
Operating income | 49,701 | 223,470 | 187,312 | 361,301 |  |  |  |
Selling, general and administrative | 0 | 12,491 | 23 | 37,203 |  |  |  |
Maintenance and utilities | 0 | 0 | 0 | 0 |  |  |  |
Depreciation and amortization | 3,218 | 2,355 | 8,744 | 6,375 |  |  |  |
Corporate expense | 18,757 | 14,247 | 61,128 | 45,121 |  |  |  |
Project development, preopening and writedowns | 1,252 | 7,213 | 3,979 | 11,205 |  |  |  |
Other expense (income) |  |  |  |  |  |  |  |
Interest expense, net | 42,544 | 41,778 | 127,344 | 116,245 |  |  |  |
Loss on early extinguishments and modifications of debt | 319 | 28,356 | 853 | 28,356 |  |  |  |
Other, net | 18 | 0 | 538 | 1 |  |  |  |
Total other expense, net | 42,881 | 70,134 | 128,735 | 144,602 |  |  |  |
Income (loss) before income taxes | 6,820 | 153,336 | 58,577 | 216,699 |  |  |  |
Income tax (provision) benefit | 16,156 | 189,235 | 48,466 | 189,084 |  |  |  |
Income (Loss) from Continuing Operations Attributable to Parent |  | 342,571 | 107,043 | 405,783 |  |  |  |
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent |  | 0 | 0 | 0 |  |  |  |
Net income | 22,976 | 342,571 | 107,043 | 405,783 |  |  |  |
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest | 22,671 | 342,988 | 107,844 | 406,537 |  |  |  |
Guarantor Subsidiaries |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |
Net revenues | 580,932 | 524,944 | 1,771,644 | 1,608,759 |  |  |  |
Costs and Expenses |  |  |  |  |  |  |  |
Operating | 298,306 | 276,484 | 903,434 | 839,405 |  |  |  |
Impairments of assets |  |  |  | 0 |  |  |  |
Other operating items, net | 631 | 3 | 1,355 | 449 |  |  |  |
Intercompany Expense | 22,345 | 34,299 | 68,740 | 106,119 |  |  |  |
Costs and Expenses | 492,414 | 444,386 | 1,478,292 | 1,352,665 |  |  |  |
Equity in Earnings of Subsidiaries | (559) | (607) | (857) | (1,375) |  |  |  |
Operating income | 87,959 | 79,951 | 292,495 | 254,719 |  |  |  |
Selling, general and administrative | 89,438 | 66,717 | 270,168 | 199,534 |  |  |  |
Maintenance and utilities | 29,839 | 27,463 | 81,451 | 75,675 |  |  |  |
Depreciation and amortization | 50,935 | 44,595 | 149,905 | 134,485 |  |  |  |
Corporate expense | 274 | 471 | 1,012 | 1,380 |  |  |  |
Project development, preopening and writedowns | 646 | (5,646) | 2,227 | (4,382) |  |  |  |
Other expense (income) |  |  |  |  |  |  |  |
Interest expense, net | 306 | 12,369 | 981 | 51,386 |  |  |  |
Loss on early extinguishments and modifications of debt | 0 | 13,162 | 0 | 14,008 |  |  |  |
Other, net | (139) | 20 | 45 | 196 |  |  |  |
Total other expense, net | 167 | 25,551 | 1,026 | 65,590 |  |  |  |
Income (loss) before income taxes | 87,792 | 54,400 | 291,469 | 189,129 |  |  |  |
Income tax (provision) benefit | (30,087) | 363 | (99,325) | (14,845) |  |  |  |
Income (Loss) from Continuing Operations Attributable to Parent |  | 54,763 | 192,144 | 174,284 |  |  |  |
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent |  | 180,707 | 21,392 | 211,052 |  |  |  |
Net income | 57,705 | 235,470 | 213,536 | 385,336 |  |  |  |
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest | 57,400 | 235,887 | 214,337 | 386,090 |  |  |  |
Non-Guarantor Subsidiaries (100% Owned) |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |
Net revenues | 11,552 | 12,212 | 35,870 | 36,606 |  |  |  |
Costs and Expenses |  |  |  |  |  |  |  |
Operating | 10,889 | 10,971 | 32,548 | 32,313 |  |  |  |
Impairments of assets |  |  |  | 0 |  |  |  |
Other operating items, net | 0 | 0 | 0 | 0 |  |  |  |
Intercompany Expense | 0 | 365 | 0 | 1,095 |  |  |  |
Costs and Expenses | 15,577 | 17,655 | 46,226 | 50,392 |  |  |  |
Equity in Earnings of Subsidiaries | 0 | 0 | 0 | 0 |  |  |  |
Operating income | (4,025) | (5,443) | (10,356) | (13,786) |  |  |  |
Selling, general and administrative | 1,850 | 1,623 | 5,770 | 4,945 |  |  |  |
Maintenance and utilities | 405 | 391 | 1,056 | 1,036 |  |  |  |
Depreciation and amortization | 1,048 | 978 | 3,079 | 2,971 |  |  |  |
Corporate expense | 308 | 1,159 | 1,248 | 3,382 |  |  |  |
Project development, preopening and writedowns | 1,077 | 2,168 | 2,525 | 4,650 |  |  |  |
Other expense (income) |  |  |  |  |  |  |  |
Interest expense, net | 7 | 6 | 19 | 18 |  |  |  |
Loss on early extinguishments and modifications of debt | 0 | 0 | 0 | 0 |  |  |  |
Other, net | (18) | (19) | (52) | (54) |  |  |  |
Total other expense, net | (11) | (13) | (33) | (36) |  |  |  |
Income (loss) before income taxes | (4,014) | (5,430) | (10,323) | (13,750) |  |  |  |
Income tax (provision) benefit | 1,279 | 22 | 3,344 | (8) |  |  |  |
Income (Loss) from Continuing Operations Attributable to Parent |  | (5,408) | (6,979) | (13,758) |  |  |  |
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent |  | 0 | 0 | 0 |  |  |  |
Net income | (2,735) | (5,408) | (6,979) | (13,758) |  |  |  |
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest | (2,735) | (5,408) | (6,979) | (13,758) |  |  |  |
Non-Guarantor Subsidiaries (Not 100% Owned) |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |
Net revenues | 0 | 0 | 0 | 0 |  |  |  |
Costs and Expenses |  |  |  |  |  |  |  |
Operating | 0 | 0 | 0 | 0 |  |  |  |
Impairments of assets |  |  |  | 0 |  |  |  |
Other operating items, net | 0 | 0 | 0 | 0 |  |  |  |
Intercompany Expense | 0 | 0 | 0 | 0 |  |  |  |
Costs and Expenses | 0 | 0 | 0 | 0 |  |  |  |
Equity in Earnings of Subsidiaries | 0 | 0 | 0 | 0 |  |  |  |
Operating income | 0 | 0 | 0 | 0 |  |  |  |
Selling, general and administrative | 0 | 0 | 0 | 0 |  |  |  |
Maintenance and utilities | 0 | 0 | 0 | 0 |  |  |  |
Depreciation and amortization | 0 | 0 | 0 | 0 |  |  |  |
Corporate expense | 0 | 0 | 0 | 0 |  |  |  |
Project development, preopening and writedowns | 0 | 0 | 0 | 0 |  |  |  |
Other expense (income) |  |  |  |  |  |  |  |
Interest expense, net | 0 | 0 | 0 | 0 |  |  |  |
Loss on early extinguishments and modifications of debt | 0 | 0 | 0 | 0 |  |  |  |
Other, net | 0 | 0 | 0 | 0 |  |  |  |
Total other expense, net | 0 | 0 | 0 | 0 |  |  |  |
Income (loss) before income taxes | 0 | 0 | 0 | 0 |  |  |  |
Income tax (provision) benefit | 0 | 0 | 0 | 0 |  |  |  |
Income (Loss) from Continuing Operations Attributable to Parent |  | 0 | 0 | 0 |  |  |  |
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent |  | 0 | 0 | 0 |  |  |  |
Net income | 0 | 0 | 0 | 0 |  |  |  |
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest | 0 | 0 | 0 | 0 |  |  |  |
Eliminations |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |
Net revenues | (22,646) | (34,963) | (69,666) | (108,113) |  |  |  |
Costs and Expenses |  |  |  |  |  |  |  |
Operating | 0 | 0 | 0 | 0 |  |  |  |
Impairments of assets |  |  |  | 0 |  |  |  |
Other operating items, net | 0 | 0 | 0 | 0 |  |  |  |
Intercompany Expense | (22,646) | (34,965) | (69,643) | (108,117) |  |  |  |
Costs and Expenses | (22,646) | (34,963) | (69,666) | (108,113) |  |  |  |
Equity in Earnings of Subsidiaries | (54,970) | (230,062) | (206,557) | (371,578) |  |  |  |
Operating income | (54,970) | (230,062) | (206,557) | (371,578) |  |  |  |
Selling, general and administrative | 0 | 2 | (23) | 4 |  |  |  |
Maintenance and utilities | 0 | 0 | 0 | 0 |  |  |  |
Depreciation and amortization | 0 | 0 | 0 | 0 |  |  |  |
Corporate expense | 0 | 0 | 0 | 0 |  |  |  |
Project development, preopening and writedowns | 0 | 0 | 0 | 0 |  |  |  |
Other expense (income) |  |  |  |  |  |  |  |
Interest expense, net | 0 | 0 | 0 | 0 |  |  |  |
Loss on early extinguishments and modifications of debt | 0 | 0 | 0 | 0 |  |  |  |
Other, net | 0 | 0 | 0 | 0 |  |  |  |
Total other expense, net | 0 | 0 | 0 | 0 |  |  |  |
Income (loss) before income taxes | (54,970) | (230,062) | (206,557) | (371,578) |  |  |  |
Income tax (provision) benefit | 0 | 0 | 0 | 0 |  |  |  |
Income (Loss) from Continuing Operations Attributable to Parent |  | (230,062) | (206,557) | (371,578) |  |  |  |
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent |  | 0 | 0 | 0 |  |  |  |
Net income | (54,970) | (230,062) | (206,557) | (371,578) |  |  |  |
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest | (54,665) | (230,479) | (207,358) | (372,332) |  |  |  |
Corporate expense |  |  |  |  |  |  |  |
Costs and Expenses |  |  |  |  |  |  |  |
Corporate expense | (17,480) | (14,884) | (53,850) | (44,355) |  |  |  |
Investments [Member] |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value | $ 17,823 | $ 18,279 | $ 17,823 | $ 18,279 | $ 17,456 | $ 17,259 | $ 17,832 | $ 17,839

X
- Definition Casino, Food and Beverage, Occupancy, Entertainment, Retail and Other Costs + References No definition available. + Details
Name: | byd_CasinoFoodAndBeverageOccupancyEntertainmentRetailAndOtherCosts
Namespace Prefix: | byd_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Corporate expense + References No definition available. + Details
Name: | byd_CorporateExpense
Namespace Prefix: | byd_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Equity in Earnings of Subsidiaries + References No definition available. + Details
Name: | byd_EquityInEarningsOfSubsidiaries
Namespace Prefix: | byd_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Intercompany Expense + References No definition available. + Details
Name: | byd_IntercompanyExpense
Namespace Prefix: | byd_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Project development, preopening and writedowns + References No definition available. + Details
Name: | byd_Projectdevelopmentpreopeningandwritedowns
Namespace Prefix: | byd_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Property maintenance and utility costs + References No definition available. + Details
Name: | byd_PropertyMaintenanceAndUtilityCosts
Namespace Prefix: | byd_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=68055307&loc=d3e2420-110228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 + Details
Name: | us-gaap_AssetImpairmentCharges
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income. Excludes changes in equity resulting from investments by owners and distributions to owners. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=68079674&loc=SL4569616-111683 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4K -URI http://asc.fasb.org/extlink&oid=65897068&loc=SL4591552-111686 + Details
Name: | us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_CondensedFinancialStatementsCaptionsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Total costs of sales and operating expenses for the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
Name: | us-gaap_CostsAndExpenses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_CostsAndExpensesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 + Details
Name: | us-gaap_DepreciationAndAmortization
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=49170532&loc=d3e12317-112629 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=49170532&loc=d3e12355-112629 + Details
Name: | us-gaap_GainsLossesOnExtinguishmentOfDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount after tax of income (loss) from continuing operations attributable to the parent. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.13) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=68079674&loc=SL4613673-111683 + Details
Name: | us-gaap_IncomeLossFromContinuingOperations
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 20 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=68072869&loc=d3e41242-110953 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(10)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(15)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(8)) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 + Details
Name: | us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount after tax of income (loss) from a discontinued operation attributable to the parent. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5C -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721675-107760 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3B -URI http://asc.fasb.org/extlink&oid=65878427&loc=SL51721525-107759 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3A -URI http://asc.fasb.org/extlink&oid=65878427&loc=SL51721523-107759 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=65878427&loc=d3e957-107759 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=65878427&loc=d3e1012-107759 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64827811&loc=d3e1361-107760 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5B -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721673-107760 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=68079674&loc=SL4569616-111683 + Details
Name: | us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32639-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Income Tax Expense (or Benefit) -URI http://asc.fasb.org/extlink&oid=6515339 + Details
Name: | us-gaap_IncomeTaxExpenseBenefit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The net amount of nonoperating interest income (expense). + References No definition available. + Details
Name: | us-gaap_InterestIncomeExpenseNonoperatingNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Net Income -URI http://asc.fasb.org/extlink&oid=51831255 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(22)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(18)) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Other Comprehensive Income -URI http://asc.fasb.org/extlink&oid=51831270 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(20)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
Name: | us-gaap_NetIncomeLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.7) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
Name: | us-gaap_NonoperatingIncomeExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_NonoperatingIncomeExpenseAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The net result for the period of deducting operating expenses from operating revenues. + References No definition available. + Details
Name: | us-gaap_OperatingIncomeLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The total amount of other operating cost and expense items that are associated with the entity's normal revenue producing operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.3) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
Name: | us-gaap_OtherCostAndExpenseOperating
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of expense classified as other. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.7) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4,6) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
Name: | us-gaap_OtherExpenses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
Name: | us-gaap_SalesRevenueNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -SubTopic 10 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=68048583&loc=d3e3636-108311 + Details
Name: | us-gaap_SellingGeneralAndAdministrativeExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | dei_LegalEntityAxis=us-gaap_ParentCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=us-gaap_GuarantorSubsidiariesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=byd_NonGuarantorSubsidiariesWhollyOwnedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=byd_NonGuarantorSubsidiariesLessThanWhollyOwnedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=byd_EliminationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=us-gaap_MaterialReconcilingItemsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=us-gaap_InvestmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |