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Loss Per Share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
1 Months Ended 3 Months Ended
Feb. 24, 2020
Mar. 31, 2020
Mar. 16, 2020
Mar. 31, 2021
Mar. 31, 2020
Earnings Per Share [Abstract]          
Antidilutive securities excluded from computation of earnings per share, amount (in shares)       3.5 2.0
Payment for repurchase of common stock $ 160        
Treasury stock, shares, acquired (in shares) 6.6 11.5 4.9    
Accelerated share repurchases, final price paid per share (in dollars per share)   $ 13.91