Consolidated Statements of Stockholders' Equity - USD ($)  shares in Thousands, $ in Millions  | 
Total  | 
Common Stock  | 
Treasury Stock  | 
Additional Paid-in Capital  | 
Accumulated Deficit  | 
Non-controlling Interest  | 
| Common Stock, Shares, Outstanding, Beginning of Period at Dec. 31, 2020 | 
252,300
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Treasury Stock, Shares, Beginning of Period at Dec. 31, 2020 | 
20,800
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Stockholders' Equity, Beginning of Period at Dec. 31, 2020 | 
$ 2,218
 | 
$ 1
 | 
$ (872)
 | 
$ 4,273
 | 
$ (3,593)
 | 
$ 2,409
 | 
| Increase (Decrease) in Stockholders' Equity [Roll Forward] | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Vesting of restricted stock units and performance stock units, shares | 
 
 | 
1,800
 | 
0
 | 
 
 | 
 
 | 
 
 | 
| Vesting of restricted stock units and performance stock units | 
0
 | 
$ 0
 | 
$ 0
 | 
0
 | 
0
 | 
0
 | 
| Share-based compensation | 
33
 | 
$ 0
 | 
$ 0
 | 
33
 | 
0
 | 
0
 | 
| Shares withheld from employees related to share-based compensation, at cost, shares, common stock | 
 
 | 
(600)
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Shares withheld from employees related to share-based compensation, at cost, shares, treasury shares | 
 
 | 
 
 | 
600
 | 
 
 | 
 
 | 
 
 | 
| Shares withheld from employees related to share-based compensation, at cost | 
(42)
 | 
$ 0
 | 
$ (42)
 | 
0
 | 
0
 | 
0
 | 
| Net income attributable to non-controlling interest | 
178
 | 
0
 | 
0
 | 
0
 | 
0
 | 
178
 | 
| Distributions to non-controlling interest | 
(160)
 | 
0
 | 
0
 | 
0
 | 
0
 | 
(160)
 | 
| Net income (loss) | 
$ 393
 | 
0
 | 
0
 | 
0
 | 
393
 | 
0
 | 
| Common Stock, Shares, Outstanding, End of Period at Mar. 31, 2021 | 
253,500
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Treasury Stock, Shares, End of Period at Mar. 31, 2021 | 
21,400
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Stockholders' Equity, End of Period at Mar. 31, 2021 | 
$ 2,620
 | 
1
 | 
(914)
 | 
4,306
 | 
(3,200)
 | 
2,427
 | 
| Common Stock, Shares, Outstanding, Beginning of Period at Dec. 31, 2020 | 
252,300
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Treasury Stock, Shares, Beginning of Period at Dec. 31, 2020 | 
20,800
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Stockholders' Equity, Beginning of Period at Dec. 31, 2020 | 
$ 2,218
 | 
1
 | 
(872)
 | 
4,273
 | 
(3,593)
 | 
2,409
 | 
| Increase (Decrease) in Stockholders' Equity [Roll Forward] | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Shares repurchased, at cost, shares | 
0
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Net income attributable to non-controlling interest | 
$ 376
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Net income (loss) | 
$ 64
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Common Stock, Shares, Outstanding, End of Period at Jun. 30, 2021 | 
253,600
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Treasury Stock, Shares, End of Period at Jun. 30, 2021 | 
21,400
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Stockholders' Equity, End of Period at Jun. 30, 2021 | 
$ 2,357
 | 
1
 | 
(915)
 | 
4,337
 | 
(3,529)
 | 
2,463
 | 
| Common Stock, Shares, Outstanding, Beginning of Period at Mar. 31, 2021 | 
253,500
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Treasury Stock, Shares, Beginning of Period at Mar. 31, 2021 | 
21,400
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Stockholders' Equity, Beginning of Period at Mar. 31, 2021 | 
$ 2,620
 | 
$ 1
 | 
$ (914)
 | 
4,306
 | 
(3,200)
 | 
2,427
 | 
| Increase (Decrease) in Stockholders' Equity [Roll Forward] | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Vesting of restricted stock units and performance stock units, shares | 
 
 | 
100
 | 
0
 | 
 
 | 
 
 | 
 
 | 
| Vesting of restricted stock units and performance stock units | 
0
 | 
$ 0
 | 
$ 0
 | 
0
 | 
0
 | 
0
 | 
| Share-based compensation | 
31
 | 
$ 0
 | 
$ 0
 | 
31
 | 
0
 | 
0
 | 
| Shares withheld from employees related to share-based compensation, at cost, shares, common stock | 
 
 | 
0
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Shares withheld from employees related to share-based compensation, at cost, shares, treasury shares | 
 
 | 
 
 | 
0
 | 
 
 | 
 
 | 
 
 | 
| Shares withheld from employees related to share-based compensation, at cost | 
$ 1
 | 
$ 0
 | 
$ 1
 | 
0
 | 
0
 | 
0
 | 
| Shares repurchased, at cost, shares | 
0
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Net income attributable to non-controlling interest | 
$ 198
 | 
0
 | 
0
 | 
0
 | 
0
 | 
198
 | 
| Distributions to non-controlling interest | 
162
 | 
0
 | 
0
 | 
0
 | 
0
 | 
162
 | 
| Net income (loss) | 
$ (329)
 | 
0
 | 
0
 | 
0
 | 
(329)
 | 
0
 | 
| Common Stock, Shares, Outstanding, End of Period at Jun. 30, 2021 | 
253,600
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Treasury Stock, Shares, End of Period at Jun. 30, 2021 | 
21,400
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Stockholders' Equity, End of Period at Jun. 30, 2021 | 
$ 2,357
 | 
1
 | 
(915)
 | 
4,337
 | 
(3,529)
 | 
2,463
 | 
| Common Stock, Shares, Outstanding, Beginning of Period at Dec. 31, 2021 | 
253,600
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Treasury Stock, Shares, Beginning of Period at Dec. 31, 2021 | 
21,600
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Stockholders' Equity, Beginning of Period at Dec. 31, 2021 | 
$ (33)
 | 
$ 1
 | 
$ (928)
 | 
4,377
 | 
(6,021)
 | 
2,538
 | 
| Increase (Decrease) in Stockholders' Equity [Roll Forward] | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Vesting of restricted stock units and performance stock units, shares | 
 
 | 
1,300
 | 
0
 | 
 
 | 
 
 | 
 
 | 
| Vesting of restricted stock units and performance stock units | 
0
 | 
$ 0
 | 
$ 0
 | 
0
 | 
0
 | 
0
 | 
| Share-based compensation | 
38
 | 
$ 0
 | 
$ 0
 | 
38
 | 
0
 | 
0
 | 
| Shares withheld from employees related to share-based compensation, at cost, shares, common stock | 
 
 | 
(300)
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Shares withheld from employees related to share-based compensation, at cost, shares, treasury shares | 
 
 | 
 
 | 
300
 | 
 
 | 
 
 | 
 
 | 
| Shares withheld from employees related to share-based compensation, at cost | 
(53)
 | 
$ 0
 | 
$ (35)
 | 
(18)
 | 
0
 | 
0
 | 
| Shares repurchased, at cost, shares | 
 
 | 
(200)
 | 
200
 | 
 
 | 
 
 | 
 
 | 
| Shares repurchased, at cost | 
(25)
 | 
$ 0
 | 
$ (25)
 | 
0
 | 
0
 | 
0
 | 
| Reacquisition of equity component of convertible notes, net of tax | 
(149)
 | 
0
 | 
0
 | 
(153)
 | 
4
 | 
0
 | 
| Net income attributable to non-controlling interest | 
84
 | 
0
 | 
0
 | 
0
 | 
0
 | 
84
 | 
| Distributions to non-controlling interest | 
(171)
 | 
0
 | 
0
 | 
0
 | 
0
 | 
(171)
 | 
| Dividends declared ($0.33 per common share) | 
(85)
 | 
0
 | 
0
 | 
0
 | 
(85)
 | 
0
 | 
| Net income (loss) | 
$ (865)
 | 
0
 | 
0
 | 
0
 | 
(865)
 | 
0
 | 
| Common Stock, Shares, Outstanding, End of Period at Mar. 31, 2022 | 
254,400
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Treasury Stock, Shares, End of Period at Mar. 31, 2022 | 
22,100
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Stockholders' Equity, End of Period at Mar. 31, 2022 | 
$ (1,259)
 | 
1
 | 
(988)
 | 
4,244
 | 
(6,967)
 | 
2,451
 | 
| Common Stock, Shares, Outstanding, Beginning of Period at Dec. 31, 2021 | 
253,600
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Treasury Stock, Shares, Beginning of Period at Dec. 31, 2021 | 
21,600
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Stockholders' Equity, Beginning of Period at Dec. 31, 2021 | 
$ (33)
 | 
1
 | 
(928)
 | 
4,377
 | 
(6,021)
 | 
2,538
 | 
| Increase (Decrease) in Stockholders' Equity [Roll Forward] | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Shares repurchased, at cost, shares | 
4,370
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Net income attributable to non-controlling interest | 
$ 256
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Net income (loss) | 
$ (124)
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Common Stock, Shares, Outstanding, End of Period at Jun. 30, 2022 | 
250,400
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Treasury Stock, Shares, End of Period at Jun. 30, 2022 | 
26,200
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Stockholders' Equity, End of Period at Jun. 30, 2022 | 
$ (1,195)
 | 
1
 | 
(1,529)
 | 
4,277
 | 
(6,311)
 | 
2,367
 | 
| Common Stock, Shares, Outstanding, Beginning of Period at Mar. 31, 2022 | 
254,400
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Treasury Stock, Shares, Beginning of Period at Mar. 31, 2022 | 
22,100
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Stockholders' Equity, Beginning of Period at Mar. 31, 2022 | 
$ (1,259)
 | 
$ 1
 | 
$ (988)
 | 
4,244
 | 
(6,967)
 | 
2,451
 | 
| Increase (Decrease) in Stockholders' Equity [Roll Forward] | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Vesting of restricted stock units and performance stock units, shares | 
 
 | 
100
 | 
0
 | 
 
 | 
 
 | 
 
 | 
| Vesting of restricted stock units and performance stock units | 
0
 | 
$ 0
 | 
$ 0
 | 
0
 | 
0
 | 
0
 | 
| Share-based compensation | 
34
 | 
$ 0
 | 
$ 0
 | 
34
 | 
0
 | 
0
 | 
| Shares withheld from employees related to share-based compensation, at cost, shares, common stock | 
 
 | 
0
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Shares withheld from employees related to share-based compensation, at cost, shares, treasury shares | 
 
 | 
 
 | 
0
 | 
 
 | 
 
 | 
 
 | 
| Shares withheld from employees related to share-based compensation, at cost | 
$ (2)
 | 
$ 0
 | 
$ (1)
 | 
(1)
 | 
0
 | 
0
 | 
| Shares repurchased, at cost, shares | 
4,130
 | 
(4,100)
 | 
4,100
 | 
 
 | 
 
 | 
 
 | 
| Shares repurchased, at cost | 
$ (540)
 | 
$ 0
 | 
$ (540)
 | 
0
 | 
0
 | 
0
 | 
| Net income attributable to non-controlling interest | 
172
 | 
0
 | 
0
 | 
0
 | 
0
 | 
172
 | 
| Distributions to non-controlling interest | 
(256)
 | 
0
 | 
0
 | 
0
 | 
0
 | 
(256)
 | 
| Dividends declared ($0.33 per common share) | 
(85)
 | 
0
 | 
0
 | 
0
 | 
(85)
 | 
0
 | 
| Net income (loss) | 
$ 741
 | 
0
 | 
0
 | 
0
 | 
741
 | 
0
 | 
| Common Stock, Shares, Outstanding, End of Period at Jun. 30, 2022 | 
250,400
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Treasury Stock, Shares, End of Period at Jun. 30, 2022 | 
26,200
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
| Stockholders' Equity, End of Period at Jun. 30, 2022 | 
$ (1,195)
 | 
$ 1
 | 
$ (1,529)
 | 
$ 4,277
 | 
$ (6,311)
 | 
$ 2,367
 |