Quarterly report pursuant to Section 13 or 15(d)

Debt - Additional Information (Details)

v3.19.1
Debt - Additional Information (Details)
$ in Millions
3 Months Ended
Mar. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Senior Secured Revolving Credit Facility    
Debt Instrument [Line Items]    
Maximum consolidated leverage ratio 5.0  
Carrying value $ 582 $ 439
Senior Notes | 1.75% Senior Notes Due 2020    
Debt Instrument [Line Items]    
Stated interest rate (as a percent) 1.75%  
Shares issued (shares per thousand dollars) 0.0877  
Carrying value $ 1 0
Senior Notes | 1.75% Senior Notes Due 2023    
Debt Instrument [Line Items]    
Stated interest rate (as a percent) 1.75%  
Shares issued (shares per thousand dollars) 0.1504  
Carrying value $ 151 $ 0
Pandora | Senior Notes | 1.75% Senior Notes Due 2020    
Debt Instrument [Line Items]    
Carrying value 151  
Pandora    
Debt Instrument [Line Items]    
Letters of credit $ 1