Consolidated Statements of Operations (Unaudited) - USD ($)
shares in Millions, $ in Millions |
3 Months Ended |
Mar. 31, 2018 |
Mar. 31, 2017 |
| Income Statement [Abstract] |
|
|
| Operating revenues |
$ 761
|
$ 756
|
| Operating expenses: |
|
|
| Operation and maintenance |
347
|
334
|
| Depreciation and amortization |
129
|
124
|
| General taxes |
70
|
68
|
| Gain on asset dispositions and purchases |
(2)
|
0
|
| Total operating expenses, net |
544
|
526
|
| Operating income |
217
|
230
|
| Other income (expense): |
|
|
| Interest, net |
(84)
|
(85)
|
| Non-operating benefit costs, net |
3
|
(3)
|
| Other, net |
4
|
3
|
| Total other income (expense) |
(77)
|
(85)
|
| Income before income taxes |
140
|
145
|
| Provision for income taxes |
34
|
52
|
| Net income attributable to common stockholders |
$ 106
|
$ 93
|
| Basic earnings per share: |
|
|
| Net income attributable to common stockholders - Basic (dollars per share) |
$ 0.60
|
$ 0.52
|
| Diluted earnings per share: |
|
|
| Net income attributable to common stockholders - Diluted (dollars per share) |
$ 0.59
|
$ 0.52
|
| Weighted-average common shares outstanding: |
|
|
| Weighted-average common shares outstanding - Basic (per share) |
178
|
178
|
| Weighted-average common shares outstanding - Diluted (per share) |
179
|
179
|
| Dividends declared per common share (dollars per share) |
$ 0
|
$ 0
|