Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Common Stock (Details)

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Stockholders' Equity - Common Stock (Details) - USD ($)
 3 Months Ended 9 Months Ended
Aug. 31, 2017
Jul. 11, 2017
Apr. 25, 2017
Feb. 28, 2017
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Class of Stock [Line Items]                  
Common stock, par value (in dollars per share)         $ 0.001   $ 0.001   $ 0.001
Common stock, shares authorized (in shares)         9,000,000,000   9,000,000,000   9,000,000,000
Common stock, shares issued (in shares)         4,604,441,000   4,604,441,000   4,746,047,000
Common stock, shares outstanding (in shares)         4,601,941,000   4,601,941,000   4,740,947,000
Common stock reserved for issuance (in shares)         321,868,000   321,868,000    
Dividends declared per common share (in dollars per share)   $ 0.010     $ 0.010 $ 0 $ 0.030 $ 0  
Dividends paid $ 46,216,000   $ 46,501,000 $ 47,137,000     $ 139,854,000 $ 0  
Number of shares repurchased (in shares)         2,397,932,000   2,397,932,000    
Aggregate cost for shares repurchased         $ 8,960,948,000   $ 8,960,948,000    
Remaining amount authorized under the stock repurchase program         1,039,052,000   $ 1,039,052,000    
Common Stock                  
Class of Stock [Line Items]                  
Issuance of common stock as part of investment in Sirius XM Canada (in shares)             35,000,000    
Stock repurchase program, aggregate authorized amount         $ 10,000,000,000   $ 10,000,000,000