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Goodwill and Other Intangible Assets - Changes in Carrying Value of Goodwill by Segment (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Goodwill [Roll Forward]      
Goodwill, Gross Beginning Balance $ 5,060 $ 5,060 $ 9,454
Decrease in Goodwill Due to CEOC Deconsolidation     (4,294)
Goodwill, Written off Related to Sale of Business Unit [1]     (100)
Goodwill, Gross Ending Balance   5,060 5,060
Goodwill, Impaired, Accumulated Impairment Loss, Beginning (3,452) (3,452) (7,088)
Goodwill, Accumulated Impairment Transfers     3,621
Goodwill, Accumulated Impairment Written Off Related to Sale of Business Unit [1]     15
Goodwill, Impaired, Accumulated Impairment Loss   (3,452) (3,452)
Net Carrying Value of Goodwill 1,608 1,608 1,608
CEOC      
Goodwill [Roll Forward]      
Goodwill, Gross Beginning Balance 0 0 4,294
Decrease in Goodwill Due to CEOC Deconsolidation     (4,294)
Goodwill, Written off Related to Sale of Business Unit     0
Goodwill, Gross Ending Balance   0 0
Goodwill, Impaired, Accumulated Impairment Loss, Beginning 0 0 (3,621)
Goodwill, Accumulated Impairment Transfers     3,621
Goodwill, Accumulated Impairment Written Off Related to Sale of Business Unit     0
Goodwill, Impaired, Accumulated Impairment Loss   0 0
Net Carrying Value of Goodwill   0 0
CERP      
Goodwill [Roll Forward]      
Goodwill, Gross Beginning Balance 3,894 3,894 3,894
Decrease in Goodwill Due to CEOC Deconsolidation     0
Goodwill, Written off Related to Sale of Business Unit     0
Goodwill, Gross Ending Balance   3,894 3,894
Goodwill, Impaired, Accumulated Impairment Loss, Beginning (2,492) (2,492) (2,492)
Goodwill, Accumulated Impairment Transfers     0
Goodwill, Accumulated Impairment Written Off Related to Sale of Business Unit     0
Goodwill, Impaired, Accumulated Impairment Loss   (2,492) (2,492)
Net Carrying Value of Goodwill   1,402 1,402
CGP      
Goodwill [Roll Forward]      
Goodwill, Gross Beginning Balance 1,166 1,166 1,266
Decrease in Goodwill Due to CEOC Deconsolidation     0
Goodwill, Written off Related to Sale of Business Unit     (100)
Goodwill, Gross Ending Balance   1,166 1,166
Goodwill, Impaired, Accumulated Impairment Loss, Beginning $ (960) (960) (975)
Goodwill, Accumulated Impairment Transfers     0
Goodwill, Accumulated Impairment Written Off Related to Sale of Business Unit     15
Goodwill, Impaired, Accumulated Impairment Loss   (960) (960)
Net Carrying Value of Goodwill   $ 206 $ 206
Licensing Agreements [Member]      
Goodwill [Line Items]      
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life 7 years 3 months 7 years 6 months  
[1] Assets and liabilities related to the SMG Business were reclassified to assets held for sale (see Note 17).