Quarterly report pursuant to Section 13 or 15(d)

Investments In Affiliates Accounted For Using The Equity Method (Summary of Carrying Amount and Percentage Ownership of Significant Investments in Affiliates) (Details)

v3.8.0.1
Investments In Affiliates Accounted For Using The Equity Method (Summary of Carrying Amount and Percentage Ownership of Significant Investments in Affiliates) (Details) - USD ($)
$ in Millions
Mar. 31, 2018
Dec. 31, 2017
Schedule of Equity Method Investments [Line Items]    
Equity Method Investments $ 204 $ 309
FTD    
Schedule of Equity Method Investments [Line Items]    
Percentage ownership 37.00%  
Market value $ 37  
Equity Method Investments 67 73
LendingTree    
Schedule of Equity Method Investments [Line Items]    
Equity Method Investments   115
Other    
Schedule of Equity Method Investments [Line Items]    
Equity Method Investments $ 137 $ 121