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Supplemental Equity and Comprehensive Income Information - Stock Narrative (Details) - $ / shares
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Supplemental Equity and Comprehensive Income Information      
Common stock, par value per share (in dollars per share) $ 0.01 $ 0.01 $ 0.01
Common stock, shares authorized (in shares) 3,000,000,000.0 3,000,000,000.0 3,000,000,000.0
Common stock, shares issued (in shares) 944,033,056 944,033,056 944,033,056
Preferred stock, shares authorized (in shares) 10,000,000 10,000,000 10,000,000