Stock-Based Compensation Stock-Based Compensation Attributable to Variable Interest Entities (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Allocated Share-based Compensation Expense	$ 33.3	$ 8.5	$ 83.2	$ 18.2
Caesars Interactive Entertainment [Member]
Allocated Share-based Compensation Expense	22.0	2.5	48.4	6.4
Caesars Interactive Entertainment [Member] | Liability Classified Awards [Member]
Allocated Share-based Compensation Expense	20.1	2.1	42.6	4.4
Caesars Interactive Entertainment [Member] | Equity Classified Awards [Member]
Allocated Share-based Compensation Expense	$ 1.9	$ 0.4	$ 5.8	$ 2.0