Stock-Based Compensation Stock-Based Compensation Attributable to Variable Interest Entities (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Allocated Share-based Compensation Expense	$ 23.5	$ 6.1	$ 49.9	$ 9.7
Caesars Interactive Entertainment [Member]
Allocated Share-based Compensation Expense	8.1	2.6	26.4	3.9
Liability Classified Awards [Member] | Caesars Interactive Entertainment [Member]
Allocated Share-based Compensation Expense	6.1	1.8	22.5	2.3
Equity Classified Awards [Member] | Caesars Interactive Entertainment [Member]
Allocated Share-based Compensation Expense	$ 2.0	$ 0.8	$ 3.9	$ 1.6