Fair Value Measurements - Carrying Amounts and Estimated Fair Values by Input Level (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Feb. 28, 2021
Financial assets:
Equity securities	$ 17.1	$ 84.3
Senior Notes | 5.625% Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate	5.625%	5.625%
Senior Notes | 4.125% Notes due 2029
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate	4.125%
Notes Payable, Other Payables
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate			27.00%
Fair Value, Recurring | Level 1
Financial assets:
Cash and cash equivalents	$ 1,624.0	$ 1,863.9
Equity securities	0.0	0.0
Held-to-maturity securities	0.0	0.0
Promissory notes	0.0	0.0
Financial liabilities:
Other liabilities	0.0	0.0
Puts and calls related to certain Barstool shares	0.0	0.0
Fair Value, Recurring | Level 1 | Amended Credit Facilities
Financial liabilities:
Long-term debt	1,514.7	1,559.6
Fair Value, Recurring | Level 1 | Senior Notes | 5.625% Notes
Financial liabilities:
Long-term debt	371.0	411.5
Fair Value, Recurring | Level 1 | Senior Notes | 4.125% Notes due 2029
Financial liabilities:
Long-term debt	327.0	389.5
Fair Value, Recurring | Level 1 | Convertible Notes
Financial liabilities:
Long-term debt	550.8	780.0
Fair Value, Recurring | Level 1 | Notes Payable, Other Payables
Financial liabilities:
Long-term debt	0.0	0.0
Fair Value, Recurring | Level 2
Financial assets:
Cash and cash equivalents	0.0	0.0
Equity securities	17.1	84.3
Held-to-maturity securities	6.7	6.7
Promissory notes	7.9	15.1
Financial liabilities:
Other liabilities	2.4	2.7
Puts and calls related to certain Barstool shares	0.4	1.9
Fair Value, Recurring | Level 2 | Amended Credit Facilities
Financial liabilities:
Long-term debt	0.0	0.0
Fair Value, Recurring | Level 2 | Senior Notes | 5.625% Notes
Financial liabilities:
Long-term debt	0.0	0.0
Fair Value, Recurring | Level 2 | Senior Notes | 4.125% Notes due 2029
Financial liabilities:
Long-term debt	0.0	0.0
Fair Value, Recurring | Level 2 | Convertible Notes
Financial liabilities:
Long-term debt	0.0	0.0
Fair Value, Recurring | Level 2 | Notes Payable, Other Payables
Financial liabilities:
Long-term debt	36.4	53.9
Fair Value, Recurring | Level 3
Financial assets:
Cash and cash equivalents	0.0	0.0
Equity securities	0.0	0.0
Held-to-maturity securities	0.0	0.0
Promissory notes	0.0	0.0
Financial liabilities:
Other liabilities	7.2	10.5
Puts and calls related to certain Barstool shares	0.0	0.0
Fair Value, Recurring | Level 3 | Amended Credit Facilities
Financial liabilities:
Long-term debt	0.0	0.0
Fair Value, Recurring | Level 3 | Senior Notes | 5.625% Notes
Financial liabilities:
Long-term debt	0.0	0.0
Fair Value, Recurring | Level 3 | Senior Notes | 4.125% Notes due 2029
Financial liabilities:
Long-term debt	0.0	0.0
Fair Value, Recurring | Level 3 | Convertible Notes
Financial liabilities:
Long-term debt	0.0	0.0
Fair Value, Recurring | Level 3 | Notes Payable, Other Payables
Financial liabilities:
Long-term debt	118.0	90.4
Fair Value, Recurring | Carrying Amount
Financial assets:
Cash and cash equivalents	1,624.0	1,863.9
Equity securities	17.1	84.3
Held-to-maturity securities	6.7	6.7
Promissory notes	7.9	15.1
Financial liabilities:
Other liabilities	9.9	13.3
Puts and calls related to certain Barstool shares	0.4	1.9
Fair Value, Recurring | Carrying Amount | Amended Credit Facilities
Financial liabilities:
Long-term debt	1,503.6	1,544.5
Fair Value, Recurring | Carrying Amount | Senior Notes | 5.625% Notes
Financial liabilities:
Long-term debt	399.7	399.6
Fair Value, Recurring | Carrying Amount | Senior Notes | 4.125% Notes due 2029
Financial liabilities:
Long-term debt	393.8	392.9
Fair Value, Recurring | Carrying Amount | Convertible Notes
Financial liabilities:
Long-term debt	324.3	253.5
Fair Value, Recurring | Carrying Amount | Notes Payable, Other Payables
Financial liabilities:
Long-term debt	156.1	146.3
Fair Value, Recurring | Fair Value
Financial assets:
Cash and cash equivalents	1,624.0	1,863.9
Equity securities	17.1	84.3
Held-to-maturity securities	6.7	6.7
Promissory notes	7.9	15.1
Financial liabilities:
Other liabilities	9.6	13.2
Puts and calls related to certain Barstool shares	0.4	1.9
Fair Value, Recurring | Fair Value | Amended Credit Facilities
Financial liabilities:
Long-term debt	1,514.7	1,559.6
Fair Value, Recurring | Fair Value | Senior Notes | 5.625% Notes
Financial liabilities:
Long-term debt	371.0	411.5
Fair Value, Recurring | Fair Value | Senior Notes | 4.125% Notes due 2029
Financial liabilities:
Long-term debt	327.0	389.3
Fair Value, Recurring | Fair Value | Convertible Notes
Financial liabilities:
Long-term debt	550.8	780.0
Fair Value, Recurring | Fair Value | Notes Payable, Other Payables
Financial liabilities:
Long-term debt	$ 154.4	$ 144.3