XML 36 R50.htm IDEA: XBRL DOCUMENT
v3.20.1

Note 8 - Stockholders' Equity and Stock Incentive Plans - Dividends (Details) | 12 Months Ended
--- | ---
Dec. 31, 2019 $ / shares
Dividend Declared May 2, 2017 [Member] |
Dividends, record date | Dec. 28, 2018
Dividends, payment date | Jan. 15, 2019
Dividends, amount per share (in dollars per share) | $ 0.06
Dividend Declared Sept 6, 2017 [Member] |
Dividends, record date | Mar. 15, 2019
Dividends, payment date | Apr. 15, 2019
Dividends, amount per share (in dollars per share) | $ 0.06
Dividend Declared Dec 7, 2017 [Member] |
Dividends, record date | Dec. 27, 2019
Dividends, payment date | Jan. 15, 2020
Dividends, amount per share (in dollars per share) | $ 0.07

X
- Definition Date the declared dividend will be paid, in CCYY-MM-DD format. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=121583591&loc=d3e4304-108586 + Details
Name: | us-gaap_DividendPayableDateToBePaidDayMonthAndYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition The per share amount of a dividend declared, but not paid, as of the financial reporting date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=121583591&loc=d3e4304-108586 + Details
Name: | us-gaap_DividendsPayableAmountPerShare
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Date the holder must own the stock to be entitled to the dividend, in CCYY-MM-DD format. + References No definition available. + Details
Name: | us-gaap_DividendsPayableDateOfRecordDayMonthAndYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DividendsAxis=byd_DividendDeclaredMay22017Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DividendsAxis=byd_DividendDeclaredSept62017Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DividendsAxis=byd_DividendDeclaredDec72017Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |