Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity - Stock Repurchase Program (Details)

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Stockholders' Equity - Stock Repurchase Program (Details)
shares in Thousands
Dec. 31, 2017
USD ($)
shares
Class of Stock [Line Items]  
Number of shares repurchased (in shares) | shares 2,474,135
Aggregate cost for shares repurchased $ 9,377,120,000
Remaining amount authorized under the stock repurchase program 622,880,000
Common Stock  
Class of Stock [Line Items]  
Stock repurchase program, aggregate authorized amount $ 10,000,000,000