Debt - Schedule of Long-term Debt Instruments (Details) - USD ($)				12 Months Ended
	Jul. 18, 2019	Mar. 18, 2019	Feb. 14, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jul. 02, 2019	Jun. 07, 2019	Feb. 01, 2019
Debt
Capital leases				$ 2,000,000
Capital leases					$ 5,000,000
Total debt				7,853,000,000	6,895,000,000
Less: total current maturities				2,000,000	3,000,000
Less: total deferred financing costs for Notes				9,000,000	7,000,000
Total long-term debt				7,842,000,000	6,885,000,000
Loss on extinguishment of debt				57,000,000	0	$ 44,000,000
Proceeds from sale of capped call security				3,000,000	0	$ 0
Senior Secured Revolving Credit Facility
Debt
Principal amount				0
Carrying value				$ 0	439,000,000
Credit facility, unused capacity, commitment fee percentage				0.25%
Senior Notes | 1.75% Senior Notes Due 2020
Debt
Stated interest rate (as a percent)				1.75%
Principal amount				$ 1,000,000
Carrying value				1,000,000	0
Loss on extinguishment of debt				$ 1,000,000
Senior Notes | 3.875% Senior Notes Due 2022
Debt
Stated interest rate (as a percent)				3.875%
Principal amount				$ 1,000,000,000
Carrying value				$ 995,000,000	994,000,000
Senior Notes | 4.625% Senior Notes Due 2023
Debt
Stated interest rate (as a percent)				4.625%
Principal amount				$ 500,000,000
Carrying value				$ 498,000,000	497,000,000
Senior Notes | 1.75% Senior Notes Due 2023
Debt
Stated interest rate (as a percent)				1.75%
Principal amount				$ 193,000,000
Carrying value				$ 163,000,000	0
Senior Notes | 6.00% Senior Note Due 2024
Debt
Stated interest rate (as a percent)	6.00%			6.00%
Principal amount	$ 1,500,000,000			$ 0
Carrying value				$ 0	1,490,000,000
Extinguishment of debt	1,546,000,000
Loss on extinguishment of debt	$ (56,000,000)
Senior Notes | 4.625% Senior Notes Due 2024
Debt
Stated interest rate (as a percent)				4.625%			4.625%
Principal amount				$ 1,500,000,000			$ 1,500,000,000
Carrying value				$ 1,485,000,000	0
Net original issuance discount and deferred financing costs							$ 19,000,000
Senior Notes | 5.375% Senior Notes Due 2025
Debt
Stated interest rate (as a percent)				5.375%
Principal amount				$ 1,000,000,000
Carrying value				$ 993,000,000	992,000,000
Senior Notes | 5.375% Senior Notes Due 2026
Debt
Stated interest rate (as a percent)				5.375%
Principal amount				$ 1,000,000,000
Carrying value				$ 992,000,000	991,000,000
Senior Notes | 5.00% Senior Notes Due 2027
Debt
Stated interest rate (as a percent)				5.00%
Principal amount				$ 1,500,000,000
Carrying value				$ 1,488,000,000	1,487,000,000
Senior Notes | 5.500% Senior Notes Due 2029
Debt
Stated interest rate (as a percent)				5.50%
Principal amount				$ 1,250,000,000				$ 1,250,000,000
Carrying value				1,236,000,000	$ 0
Net original issuance discount and deferred financing costs								$ 16,000,000
Line of Credit | Senior Secured Revolving Credit Facility
Debt
Line of credit facility				$ 1,750,000,000
Pandora | Senior Notes | 1.75% Senior Notes Due 2020
Debt
Stated interest rate (as a percent)			1.75%	1.75%
Short-term debt									$ 152,000,000
Debt instrument redemption price (as a percent of aggregate principal)			100.00%
Pandora | Senior Notes | 1.75% Senior Notes Due 2023
Debt
Principal amount									$ 193,000,000
Pandora | Senior Notes | 1.75% Senior Notes Due 2020
Debt
Extinguishment of debt		$ 151,000,000
Pandora
Debt
Letters of credit outstanding				$ 1,000,000