Commitments and Contingencies - Future Minimum Commitments (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Long-term Purchase Commitment [Line Items]
Unrecognized tax benefits, net of tax credits, noncurrent	$ 637
Estimated Transition Tax net payments, recorded liability		$ 467
Transition tax liability	198
Total Contractual Obligations
Long-term Purchase Commitment [Line Items]
2019	225
2020	180
2021	790
2022	511
2023	98
Thereafter	2,267
Total	4,071
Facility and Equipment Leases
Long-term Purchase Commitment [Line Items]
2019	80
2020	70
2021	53
2022	45
2023	38
Thereafter	60
Total	346
Developer and Intellectual Properties
Long-term Purchase Commitment [Line Items]
2019	24
2020	3
2021	1
2022	0
2023	0
Thereafter	0
Total	28
Marketing
Long-term Purchase Commitment [Line Items]
2019	35
2020	21
2021	0
2022	0
2023	0
Thereafter	0
Total	56
Long-term debt obligations
Long-term Purchase Commitment [Line Items]
2019	86
2020	86
2021	736
2022	466
2023	60
Thereafter	2,207
Total	$ 3,641