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Earnings Per Share - Narrative (Details) - USD ($)
$ / shares in Units, shares in Millions
1 Months Ended 2 Months Ended
Mar. 31, 2020
Sep. 30, 2020
May 20, 2019
Debt Instrument [Line Items]      
Accelerated stock repurchase program, shares to be repurchased, dollar amount     $ 500,000,000
Stock repurchased and retired (in shares)   2.9  
Repurchase price (USD per share)   $ 17.36  
Stock repurchased and retired   $ 51,000,000  
Stock repurchase program remaining authorized amount   $ 299,000,000  
Revolving Credit Agreement      
Debt Instrument [Line Items]      
Credit Agreement term 5 years