v3.19.3.a.u2
Equity Method Investments - Narrative (Details) - USD ($)
1 Months Ended 3 Months Ended 12 Months Ended
Mar. 31, 2018
Mar. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Schedule of Equity Method Investments [Line Items]          
Equity method investments     $ 1,364,000,000 $ 1,312,000,000  
Loss from equity method investment, net of tax     $ (34,000,000) $ (42,000,000) $ 0
MLU B.V.          
Schedule of Equity Method Investments [Line Items]          
Equity ownership interest 38.00% 38.00% 38.00% 38.00%  
Contingent ownership percentage   35.00%      
Equity method investments     $ 1,224,000,000 $ 1,234,000,000  
Basis difference in equity method investment     $ 796,000,000    
Weighted average remaining useful life     4 years 9 months 18 days 5 years 8 months 12 days  
Equity method investments, other than temporary impairment     $ 0 $ 0  
Event Center Office Partners, LLC          
Schedule of Equity Method Investments [Line Items]          
Equity method investments, other than temporary impairment     0 0  
Variable Interest Entity, Not Primary Beneficiary | Event Center Office Partners, LLC          
Schedule of Equity Method Investments [Line Items]          
Equity method investments     $ 138,000,000 78,000,000  
Finance lease liability       $ 58,000,000  
Payments to acquire variable interest entity $ 136,000,000        
Ownership interest 45.00%   45.00% 45.00%  
Loss from equity method investment, net of tax       $ 0  
LLC Partner 1 | Variable Interest Entity, Not Primary Beneficiary | Event Center Office Partners, LLC          
Schedule of Equity Method Investments [Line Items]          
Ownership interest 45.00%        
LLC Partner 2 | Variable Interest Entity, Not Primary Beneficiary | Event Center Office Partners, LLC          
Schedule of Equity Method Investments [Line Items]          
Ownership interest 10.00%