Annual report pursuant to Section 13 and 15(d)

Summarized Quarterly Financial Data (unaudited) (Details)

v3.20.4
Summarized Quarterly Financial Data (unaudited) (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]                      
Revenues $ 2,787 $ 1,460 $ 2,402 $ 2,709 $ 3,007 $ 2,170 $ 2,292 $ 2,261 $ 9,358 $ 9,730 $ 7,987
Income from operations 276 72 937 1,346 1,016 307 432 606 2,631 2,361 2,024
Net income (loss) 2 (508) 404 603 1,153 (260) 2 337 501 1,232 1,200
Net income (loss) attributable to common stockholders $ (194) $ (463) $ 197 $ 375 $ 939 $ (318) $ (114) $ 141 $ (85) $ 648 $ 471
Net income (loss) per share attributable to common stockholders—basic $ (0.77) [1] $ (1.84) [1] $ 0.78 [1] $ 1.48 [1] $ 3.70 [1] $ (1.25) [1] $ (0.44) [1] $ 0.55 [1] $ (0.34) $ 2.53 $ 1.92
Net income (loss) per share attributable to common stockholders—diluted $ (0.77) [1] $ (1.84) [1] $ 0.78 [1] $ 1.43 [1] $ 3.34 [1] $ (1.25) [1] $ (0.44) [1] $ 0.54 [1] $ (0.34) $ 2.51 $ 1.90
[1] The sum of the quarterly net income (loss) per share—basic and diluted may not equal the full year amount as the computations of the weighted average common shares outstanding for basic and diluted shares outstanding for each quarter and the full year are performed independently.