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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Millions
Sep. 30, 2019
Dec. 31, 2018
Statement of Financial Position [Abstract]    
Debt issuance costs $ 244 $ 157
Common stock, par value $ 0.01 $ 0.01
Common stock, shares authorized 1,800,000,000 1,800,000,000
Common stock, shares outstanding 340,053,100 342,895,200