Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity - Common Stock (Details)

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Stockholders' Equity - Common Stock (Details) - $ / shares
Dec. 31, 2020
Dec. 31, 2019
Equity [Abstract]    
Common stock, par value ( in USD per share) $ 0.001 $ 0.001
Common stock authorized (in shares) 9,000,000,000 9,000,000,000
Common stock issued (in shares) 4,176,000,000 4,412,000,000
Common stock outstanding (in shares) 4,173,000,000 4,412,000,000
Common stock reserved for issuance (in shares) 259,000,000