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Benefit Plans - Additional Information (Details) $ / shares in Units, shares in Millions, $ in Millions |  | 12 Months Ended
--- | --- | ---
Feb. 01, 2019 USD ($) | Dec. 31, 2019 USD ($) $ / shares shares | Dec. 31, 2018 USD ($) $ / shares shares | Dec. 31, 2017 USD ($) $ / shares shares
Business Acquisition [Line Items] |  |  |  |
Share-based payment expense |  | $ 250 | $ 133 | $ 124
Goodwill |  | 3,843 | 2,290 | 2,287
Share-based payment expense |  | 250 | $ 133 | $ 124
Pandora |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Exchange ratio (in shares per share) | 1.44 |  |  |
Goodwill | $ 1,553 | $ 1,553 |  |
Employees and Non Employee Stock Option |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Grant date fair value of options (in dollars per share) | $ / shares |  | $ 1.26 | $ 1.45 | $ 1.17
Options exercised in period, intrinsic value |  | $ 146 | $ 215 | $ 167
Exercise of stock options and vesting of restricted stock units (in shares) | shares |  | 15 | 19 | 17
Share-based payment expense |  | $ 60 | $ 67 | $ 78
Pre-Acquisition Replacement Equity Awards |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Goodwill |  | 8 |  |
Restricted Stock Units (RSUs) and Performance Shares |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Share-based payment expense |  | 190 | 66 | 46
Restricted stock units vested, intrinsic value |  | $ 235 | $ 85 | $ 48
Granted (in shares) | shares |  | 38 | 18 | 12
Restricted Stock Units (RSUs) |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Exercise of stock options and vesting of restricted stock units (in shares) | shares |  | 23 | 7 | 5
Performance-based Share Awards |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Granted (in shares) | shares |  | 6 | 5 | 1
Pre-Acquisition Replacement Equity Awards, Restricted Stock Units |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Goodwill |  | $ 62 |  |
Restricted Stock Units Rsu And Stock Options |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Unrecognized compensation costs |  | $ 415 | $ 254 |
Weighted-average service period (in years) |  | 2 years 4 months 24 days |  |
Acquisition-related Costs |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Share-based payment expense |  | $ 21 |  |
Maximum | Restricted Stock Units (RSUs) and Performance Shares |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Restricted stock units granted (in shares) | shares |  | 1 | 1 | 1

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