Stockholders' Equity - Summary of Noncontrolling Interest Balances (Details) - USD ($)
$ in Millions |
3 Months Ended |
9 Months Ended |
Sep. 30, 2019 |
Jun. 30, 2019 |
Mar. 31, 2019 |
Sep. 30, 2018 |
Jun. 30, 2018 |
Mar. 31, 2018 |
Sep. 30, 2019 |
Sep. 30, 2018 |
| Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward] |
|
|
|
|
|
|
|
|
| Beginning balance |
|
|
$ 1,112
|
|
|
$ 1,254
|
$ 1,112
|
$ 1,254
|
| Acquisitions |
|
|
|
$ 41
|
|
11
|
|
52
|
| Sale of subsidiaries |
|
|
|
|
|
|
|
32
|
| Contributions from noncontrolling interests |
$ 19
|
|
5
|
|
|
|
24
|
|
| Distributions to noncontrolling interests |
(12)
|
$ (10)
|
(11)
|
(9)
|
$ (11)
|
(9)
|
(33)
|
(29)
|
| Net loss |
(20)
|
|
|
(18)
|
|
|
(59)
|
(202)
|
| Other comprehensive loss, net of tax |
|
|
|
|
|
|
(4)
|
2
|
| Ending balance |
1,040
|
|
|
1,045
|
|
|
1,040
|
1,045
|
| Tax reform, change in tax rate |
|
|
|
|
|
|
|
150
|
| Capital |
|
|
|
|
|
|
|
|
| Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward] |
|
|
|
|
|
|
|
|
| Beginning balance |
|
|
1,452
|
|
|
1,380
|
1,452
|
1,380
|
| Acquisitions |
|
|
|
|
|
|
|
52
|
| Sale of subsidiaries |
|
|
|
|
|
|
|
(37)
|
| Contributions from noncontrolling interests |
|
|
|
|
|
|
24
|
|
| Distributions to noncontrolling interests |
|
|
|
|
|
|
(33)
|
(29)
|
| Net loss |
|
|
|
|
|
|
0
|
0
|
| Other comprehensive loss, net of tax |
|
|
|
|
|
|
0
|
0
|
| Ending balance |
1,443
|
|
|
1,366
|
|
|
1,443
|
1,366
|
| Accumulated Loss |
|
|
|
|
|
|
|
|
| Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward] |
|
|
|
|
|
|
|
|
| Beginning balance |
|
|
(332)
|
|
|
(126)
|
(332)
|
(126)
|
| Acquisitions |
|
|
|
|
|
|
|
0
|
| Sale of subsidiaries |
|
|
|
|
|
|
|
5
|
| Contributions from noncontrolling interests |
|
|
|
|
|
|
0
|
|
| Distributions to noncontrolling interests |
|
|
|
|
|
|
0
|
0
|
| Net loss |
|
|
|
|
|
|
(59)
|
(202)
|
| Other comprehensive loss, net of tax |
|
|
|
|
|
|
0
|
0
|
| Ending balance |
(391)
|
|
|
(323)
|
|
|
(391)
|
(323)
|
| Accumulated Other Comprehensive Income (Loss) |
|
|
|
|
|
|
|
|
| Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward] |
|
|
|
|
|
|
|
|
| Beginning balance |
|
|
$ (8)
|
|
|
$ 0
|
(8)
|
0
|
| Acquisitions |
|
|
|
|
|
|
|
0
|
| Sale of subsidiaries |
|
|
|
|
|
|
|
0
|
| Contributions from noncontrolling interests |
|
|
|
|
|
|
0
|
|
| Distributions to noncontrolling interests |
|
|
|
|
|
|
0
|
0
|
| Net loss |
|
|
|
|
|
|
0
|
0
|
| Other comprehensive loss, net of tax |
|
|
|
|
|
|
(4)
|
2
|
| Ending balance |
$ (12)
|
|
|
$ 2
|
|
|
$ (12)
|
$ 2
|