Debt - Additional Information (Detail) (USD $)	12 Months Ended					3 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012	Mar. 31, 2013	Dec. 31, 2014		Jun. 30, 2014		Sep. 30, 2014	Oct. 31, 2013	Nov. 30, 2014	Jun. 30, 2013	May 31, 2014	Apr. 30, 2014	Dec. 31, 2011
Debt Instrument [Line Items]
Unamortized discounts	$ 2,400,000,000		$ 2,500,000,000				$ 2,400,000,000
Long-term Debt, Current Maturities	15,779,000,000		197,000,000				15,779,000,000
Long-term Debt, Excluding Current Maturities	7,434,000,000		20,918,000,000				7,434,000,000
Long-term Debt, Fair Value	17,500,000,000						17,500,000,000
Long-term Debt, Gross	25,602,000,000						25,602,000,000
Amount of Restricted Net Assets for Consolidated and Unconsolidated Subsidiaries	2,400,000,000		3,000,000,000				2,400,000,000
Repayments of Long-term Debt	2,833,000,000
Gains/(losses) on Extinguishment of Debt	(96,000,000)		(30,000,000)		136,000,000
Notes Payable, Related Parties, Noncurrent	35,000,000						35,000,000
Property EBITDA	1,689,000,000		1,877,000,000		2,028,000,000
Long-term Debt	23,213,000,000		21,115,000,000				23,213,000,000
Capital Lease Obligations [Member]
Debt Instrument [Line Items]
Repayments of Long-term Debt	34,000,000
Unsecured Debt [Member]
Debt Instrument [Line Items]
Gains/(losses) on Extinguishment of Debt	(25,000,000)
Early Repayment of Senior Debt	78,000,000
Debt Conversion, Original Amount	427,000,000
Debt Conversion, Converted Instrument, Amount	368,000,000
Caesars Entertainment Operating Company [Member]
Debt Instrument [Line Items]
Unamortized discounts	2,200,000,000						2,200,000,000
Long-term Debt, Current Maturities	15,708,000,000		113,000,000				15,708,000,000
Long-term Debt, Excluding Current Maturities	392,000,000		15,670,000,000				392,000,000
Long-term Debt, Gross	18,371,000,000						18,371,000,000
Repayments of Long-term Debt						1,400,000,000
Gains/(losses) on Extinguishment of Debt						(29,000,000)
Debt Instrument, Face Amount	5,500,000,000					1,500,000,000	5,500,000,000
Line of Credit Facility, Current Borrowing Capacity	106,000,000						106,000,000
Senior Debt Excluded From Debt Covenant	5,500,000,000						5,500,000,000		3,700,000,000
Long-term Debt	16,177,000,000		15,783,000,000				16,177,000,000
Caesars Entertainment Operating Company [Member] | Maximum [Member]
Debt Instrument [Line Items]
Leverage ratio for line of credit facility	7.25						7.25		4.75
Caesars Entertainment Operating Company [Member] | Term Loan B Six [Member]
Debt Instrument [Line Items]
Repayments of Debt						134,000,000
Line of Credit Facility, Increase (Decrease), Net						134,000,000
Caesars Entertainment Operating Company [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Increase (Decrease), Net						75,000,000
Caesars Entertainment Operating Company [Member] | Other Unsecured Borrowings Special Improvements District Bonds [Member]
Debt Instrument [Line Items]
Long-term Debt, Excluding Current Maturities	46,000,000						46,000,000
Long-term Debt, Gross	47,000,000						47,000,000
Long-term Debt	47,000,000		63,000,000				47,000,000
Caesars Entertainment Operating Company [Member] | Capital Lease Obligations [Member]
Debt Instrument [Line Items]
Long-term Debt, Excluding Current Maturities	18,000,000						18,000,000
Long-term Debt, Gross	17,000,000						17,000,000
Long-term Debt	17,000,000		17,000,000				17,000,000
Caesars Entertainment Operating Company [Member] | Medium-term Notes [Member]
Debt Instrument [Line Items]
Repayments of Long-term Debt	794,000,000
Gains/(losses) on Extinguishment of Debt	(22,000,000)
Line of Credit Facility, Increase (Decrease), Net						650,000,000
Long-Term Debt Effecting Maturities	500,000,000						500,000,000
Long-Term Debt Effecting Maturities	500,000,000						500,000,000
Caesars Entertainment Operating Company [Member] | Medium-term Notes [Member] | Term Loan B Seven [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal	4,000,000
Long-term Debt, Gross	1,741,000,000	[1],[2]					1,741,000,000	[1],[2]
Debt Instrument, Original Face Amount	1,800,000,000						1,800,000,000
Repayments of Long-term Debt	1,275,000,000
Debt Instrument, Original Face Amount	1,800,000,000						1,800,000,000
Long-term Debt	1,647,000,000	[1],[2]	0	[1],[2]			1,647,000,000	[1],[2]
Caesars Entertainment Operating Company [Member] | Medium-term Notes [Member] | Term Loan B One [Member]
Debt Instrument [Line Items]
Repayments of Long-term Debt	16,000,000
Caesars Entertainment Operating Company [Member] | Medium-term Notes [Member] | Term Loan B Three [Member]
Debt Instrument [Line Items]
Repayments of Long-term Debt	13,000,000
Caesars Entertainment Operating Company [Member] | Medium-term Notes [Member] | Term Loan B Four [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	377,000,000	[1]					377,000,000	[1]
Repayments of Long-term Debt	578,000,000
Long-term Debt	362,000,000	[1]	948,000,000	[1]			362,000,000	[1]
Caesars Entertainment Operating Company [Member] | Medium-term Notes [Member] | Term Loans B Five [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	938,000,000	[1]					938,000,000	[1]
Repayments of Long-term Debt	54,000,000
Long-term Debt	919,000,000	[1]	989,000,000	[1]			919,000,000	[1]
Caesars Entertainment Operating Company [Member] | Medium-term Notes [Member] | Term Loan B Six [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	2,299,000,000	[1]					2,299,000,000	[1]
Repayments of Long-term Debt	133,000,000
Long-term Debt	2,234,000,000	[1]	2,400,000,000	[1]			2,234,000,000	[1]
Caesars Entertainment Operating Company [Member] | Medium-term Notes [Member] | Revolving Credit Facility maturing Jan 28 2017 [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Fair Value of Amount Outstanding	0		0				0
Line of Credit Facility, Remaining Borrowing Capacity	5,000,000						5,000,000
Caesars Entertainment Operating Company [Member] | Medium-term Notes [Member] | Term Loan B One - B Three [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	0	[1],[3]					0	[1],[3]
Long-term Debt	0	[1],[3]	29,000,000	[1],[3]			0	[1],[3]
Caesars Entertainment Operating Company [Member] | Medium-term Notes [Member] | Cromwell Credit Facility [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	0	[4]					0	[4]
Long-term Debt	0	[4]	180,000,000	[4]			0	[4]
Caesars Entertainment Operating Company [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	5,400,000,000						5,400,000,000
Caesars Entertainment Operating Company [Member] | Line of Credit [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	106,000,000						106,000,000
Caesars Entertainment Operating Company [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	30,000,000						30,000,000				238,000,000
Early Repayment of Senior Debt	78,000,000
Long-term Debt	30,000,000		45,000,000				30,000,000
Caesars Entertainment Operating Company [Member] | Unsecured Debt [Member] | Unsecured Senior Debt Five Point Six Two Five Percent [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	0	[3]					0	[3]
Debt Instrument, Repurchased Face Amount	792,000,000						792,000,000
Repayments of Long-term Debt	830,000,000
Gains/(losses) on Extinguishment of Debt	(6,000,000)
Long-term Debt	0	[3]	328,000,000	[3]			0	[3]
Caesars Entertainment Operating Company [Member] | Unsecured Debt [Member] | Unsecured Senior Debt Six Point Five Percent [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	297,000,000						297,000,000
Long-term Debt	270,000,000		213,000,000				270,000,000
Caesars Entertainment Operating Company [Member] | Unsecured Debt [Member] | Unsecured Senior Debt Six Point Five Percent [Member] | Third Party [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount											89,000,000
Caesars Entertainment Operating Company [Member] | Unsecured Debt [Member] | Unsecured Senior Debt Five Point Seven Five Percent [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	233,000,000						233,000,000
Long-term Debt	193,000,000		115,000,000				193,000,000
Caesars Entertainment Operating Company [Member] | Unsecured Debt [Member] | Unsecured Senior Debt Five Point Seven Five Percent [Member] | Third Party [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount											66,000,000
Caesars Entertainment Operating Company [Member] | Subsequent to Bank Amendment [Member]
Debt Instrument [Line Items]
Debt Instrument, Repurchased Face Amount	82,000,000						82,000,000
Caesars Entertainment Operating Company [Member] | Subordinated Debt [Member]
Debt Instrument [Line Items]
Repayments of Debt							18,000,000
Caesars Entertainment Operating Company [Member] | Subordinated Debt [Member] | Twenty-Fifteen Note at Ten Percent [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	3,000,000						3,000,000
Debt Instrument, Repurchased Face Amount	190,000,000						190,000,000
Repayments of Long-term Debt	191,000,000
Gains/(losses) on Extinguishment of Debt	(14,000,000)
Long-term Debt	3,000,000		188,000,000				3,000,000
Caesars Entertainment Operating Company [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line Of Credit Outstanding Amount Committed To Letters Of Credit	101,000,000						101,000,000
Line of Credit Facility, Periodic Payment, Interest	426,000,000
Caesars Entertainment Operating Company [Member] | Chester Downs Senior Secured Notes [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Excluding Current Maturities	330,000,000						330,000,000
Long-term Debt, Gross	330,000,000						330,000,000
Long-term Debt	330,000,000		330,000,000				330,000,000
Caesars Entertainment Resort Properties [Member]
Debt Instrument [Line Items]
Long-term Debt, Current Maturities	39,000,000		36,000,000				39,000,000
Long-term Debt, Excluding Current Maturities	4,735,000,000		4,575,000,000				4,735,000,000
Debt Instrument, Annual Principal Payment	25,000,000						25,000,000
Long-term Debt, Gross	4,832,000,000						4,832,000,000
Gains/(losses) on Extinguishment of Debt	(37,000,000)
Line of Credit Facility, Maximum Borrowing Capacity	(270,000,000)						(270,000,000)
Line of Credit Facility, Fair Value of Amount Outstanding	180,000,000						180,000,000
Line of Credit Facility, Remaining Borrowing Capacity	90,000,000						90,000,000
Leverage ratio for line of credit facility	6.29						6.29
Long-term Debt	4,774,000,000		4,611,000,000				4,774,000,000
Caesars Entertainment Resort Properties [Member] | Maximum [Member]
Debt Instrument [Line Items]
Leverage ratio for line of credit facility	8.0						8.0
Caesars Entertainment Resort Properties [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	2,475,000,000	[5]					2,475,000,000	[5]
Term Loans Periodic Payments	6,000,000
Long-term Debt	2,431,000,000	[5]	2,450,000,000	[5]			2,431,000,000	[5]
Caesars Entertainment Resort Properties [Member] | Secured Debt [Member] | Senior Secured Revolving Facility [Member]
Debt Instrument [Line Items]
Repayments of Long-term Debt	115,000,000
Long-term Line of Credit	180,000,000	[5]					180,000,000	[5]
Long-term Debt, Weighted Average Interest Rate	6.60%						6.60%
Long-term Debt	180,000,000	[5]	0	[5]			180,000,000	[5]
Caesars Entertainment Resort Properties [Member] | Capital Lease Obligations [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	13,000,000						13,000,000
Long-term Debt	13,000,000		5,000,000				13,000,000
Caesars Entertainment Resort Properties [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	14,000,000						14,000,000
Long-term Debt	14,000,000		21,000,000				14,000,000
Caesars Entertainment Resort Properties [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	2,800,000,000						2,800,000,000
Caesars Entertainment Resort Properties [Member] | First Lien Notes [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	1,000,000,000	[5]					1,000,000,000	[5]				1,000,000,000
Long-term Debt	994,000,000	[5]	994,000,000	[5]			994,000,000	[5]
Caesars Entertainment Resort Properties [Member] | Second Lien Notes [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	1,150,000,000	[5]					1,150,000,000	[5]				1,200,000,000
Long-term Debt	1,142,000,000	[5]	1,141,000,000	[5]			1,142,000,000	[5]
Caesars Growth Properties Holdings, LLC [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	700,000,000						700,000,000
Caesars Growth Properties Holdings, LLC [Member] | Maximum [Member]
Debt Instrument [Line Items]
Leverage ratio for line of credit facility	6.00						6.00
Caesars Growth Properties Holdings, LLC [Member] | Line of Credit [Member] | Maximum [Member] | First Three Quarters [Member]
Debt Instrument [Line Items]
Leverage ratio for line of credit facility	7.5						7.5
Caesars Growth Properties Holdings, LLC [Member] | Line of Credit [Member] | Maximum [Member] | Following Four Quarters [Member]
Debt Instrument [Line Items]
Leverage ratio for line of credit facility	6.0						6.0
Caesars Growth Properties Holdings, LLC [Member] | Line of Credit [Member] | Maximum [Member] | Remainder of Agreement [Member]
Debt Instrument [Line Items]
Leverage ratio for line of credit facility	4.75						4.75
Caesars Growth Properties Holdings, LLC [Member] | Cromwell Credit Facility [Member] | Maximum [Member] | First Three Quarters [Member]
Debt Instrument [Line Items]
Leverage ratio for line of credit facility	5.25						5.25
Caesars Growth Properties Holdings, LLC [Member] | Cromwell Credit Facility [Member] | Maximum [Member] | Following Four Quarters [Member]
Debt Instrument [Line Items]
Leverage ratio for line of credit facility	5.00						5.00
Caesars Growth Properties Holdings, LLC [Member] | Cromwell Credit Facility [Member] | Maximum [Member] | Remainder of Agreement [Member]
Debt Instrument [Line Items]
Leverage ratio for line of credit facility	4.75						4.75
Caesars Growth Partners, LLC [Member]
Debt Instrument [Line Items]
Long-term Debt, Current Maturities	20,000,000		48,000,000				20,000,000
Long-term Debt, Excluding Current Maturities	2,306,000,000		673,000,000				2,306,000,000
Debt Instrument, Annual Principal Payment	20,000,000						20,000,000
Long-term Debt, Gross	2,386,000,000	[6]					2,386,000,000	[6]
Repayments of Long-term Debt	700,000,000
Gains/(losses) on Extinguishment of Debt	(28,000,000)
Line of Credit Facility, Maximum Borrowing Capacity	(150,000,000)						(150,000,000)
Line of Credit Facility, Fair Value of Amount Outstanding	0						0
Leverage ratio for line of credit facility	3.11						3.11
Long-term Debt	2,326,000,000	[6]	721,000,000	[6]			2,326,000,000	[6]
Caesars Growth Partners, LLC [Member] | Horseshoe Baltimore Credit Facility [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	300,000,000		225,000,000				300,000,000						38,000,000	38,000,000
Line of Credit Facility, Maximum Borrowing Capacity	10,000,000						10,000,000
Caesars Growth Partners, LLC [Member] | Horseshoe Baltimore FF&E Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	30,000,000						30,000,000
Long-term Line of Credit	30,000,000						30,000,000
Caesars Growth Partners, LLC [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	1,169,000,000	[7]					1,169,000,000	[7]
Repayments of Long-term Debt	0
Debt Instrument, Face Amount															1,175,000,000
Long-term Debt	1,138,000,000	[7]	0	[7]			1,138,000,000	[7]
Caesars Growth Partners, LLC [Member] | Other Unsecured Borrowings Special Improvements District Bonds [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	14,000,000	[8]					14,000,000	[8]
Long-term Debt	14,000,000	[8]	0	[8]			14,000,000	[8]
Caesars Growth Partners, LLC [Member] | Capital Lease Obligations [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	4,000,000						4,000,000
Long-term Debt	4,000,000		0				4,000,000
Caesars Growth Partners, LLC [Member] | Medium-term Notes [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	330,000,000						330,000,000
Repayments of Long-term Debt	0
Long-term Debt	321,000,000		215,000,000				321,000,000
Caesars Growth Partners, LLC [Member] | Medium-term Notes [Member] | Cromwell Credit Facility [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	185,000,000	[4]					185,000,000	[4]	185,000,000	[4]
Long-term Debt	180,000,000	[4]	0	[4]			180,000,000	[4]
Caesars Growth Partners, LLC [Member] | Medium-term Notes [Member] | Cromwell Credit Facility [Member] | Minimum [Member]
Debt Instrument [Line Items]
Property EBITDA	7,500,000
Caesars Growth Partners, LLC [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	9,000,000	[8]					9,000,000	[8]
Long-term Debt	8,000,000	[8]	50,000,000	[8]			8,000,000	[8]
Caesars Growth Partners, LLC [Member] | Subordinated Debt [Member]
Debt Instrument [Line Items]
Repayments of Long-term Debt	0
Caesars Growth Partners, LLC [Member] | Subordinated Debt [Member] | Twenty Twenty-two Note at Nine point Three Seven Five [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	675,000,000	[7]					675,000,000	[7]								675,000,000
Long-term Debt	661,000,000	[7]	0	[7]			661,000,000	[7]
Caesars Growth Partners, LLC [Member] | Senior Secured Loan [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	0						0
Repayments of Long-term Debt	495,000,000
Repayments of Debt	477,000,000
Long-term Debt	0		456,000,000				0
Caesars Interactive Entertainment [Member]
Debt Instrument [Line Items]
Convertible Preferred Stock, Shares Issued upon Conversion					8,913
Caesars Interactive Entertainment [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Current Maturities	48,000,000						48,000,000
Long-term Debt, Gross	40,000,000						40,000,000
Long-term Debt	40,000,000				42,000,000		40,000,000										126,000,000
Cash Tender Offer [Member] | Caesars Entertainment Operating Company [Member] | Unsecured Debt [Member] | Unsecured Senior Debt Five Point Six Two Five Percent [Member]
Debt Instrument [Line Items]
Debt Instrument, Repurchase Amount	44,000,000						44,000,000
Cash Tender Offer [Member] | Caesars Entertainment Operating Company [Member] | Subordinated Debt [Member] | Twenty-Fifteen Note at Ten Percent [Member]
Debt Instrument [Line Items]
Debt Instrument, Repurchase Amount	103,000,000						103,000,000
Note Repurchase and Redemption [Member] | Caesars Entertainment Operating Company [Member] | Unsecured Debt [Member] | Unsecured Senior Debt Five Point Six Two Five Percent [Member]
Debt Instrument [Line Items]
Debt Instrument, Repurchase Amount	747,000,000						747,000,000
Note Repurchase and Redemption [Member] | Caesars Entertainment Operating Company [Member] | Subordinated Debt [Member] | Twenty-Fifteen Note at Ten Percent [Member]
Debt Instrument [Line Items]
Debt Instrument, Repurchase Amount	$ 83,000,000						$ 83,000,000

[1] In conjunction with the terms of the Bank Amendment (defined below), Caesars Entertainment guarantees collection of amounts under the Credit Facilities.

[2] The Term B7 Loans have a springing maturity to 90 days prior to March 1, 2017, if more than $500 million of CEOC’s Term B5 Loan and Term B6 Loan remain outstanding on such date.

[3] Repaid in the third quarter of 2014.

[4] The property that secured this debt was sold to CGP LLC in May 2014. The debt was formerly “Bill’s Credit Facility.”

[5] Guaranteed by Caesars Entertainment Resort Properties and its subsidiaries.

[6] As of December 31, 2014, under the CGP LLC structure, CIE has $40 million drawn under a revolver arrangement with Caesars Entertainment. Accordingly, such debt is not considered outstanding in the above presentation.

[7] Guaranteed by an indirect subsidiary of Caesars Growth Partners, LLC and certain of its wholly owned subsidiaries.

[8] The December 31, 2013 value of this debt was reclassified. The property that secured this debt was sold to CGP LLC in May 2014.