Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity Share Repurchase Program (Details)

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Stockholders' Equity Share Repurchase Program (Details) - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Equity [Abstract]      
Number of shares authorized to be repurchased under stock repurchase program (in shares) 37,500,000    
Number of shares repurchased and retired to date (in shares) 12,069,000    
Cost of shares repurchased and retired to date $ 200,400,000    
Repurchase of common stock (in shares) 1,500 0 0
Repurchase of common stock $ 19,000.0 $ 0 $ 0