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Common Stock - Narrative (Details) - $ / shares
12 Months Ended
Nov. 13, 2017
Dec. 31, 2019
Dec. 31, 2018
Class of Stock [Line Items]      
Shares of treasury stock into a rabbi trust (in shares)   0 10,646,382
Average cost (in dollars per share)     $ 50.62
Average cost, commission (in dollars per share)     $ 0.02
Rice Merger Agreement      
Class of Stock [Line Items]      
Number of shares issued in business combination (in shares) 91,000,000