Consolidated Statements of Operations (Unaudited) - USD ($)
shares in Millions, $ in Millions |
3 Months Ended |
9 Months Ended |
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
| Income Statement [Abstract] |
|
|
|
|
| Operating revenues |
$ 930
|
$ 896
|
$ 2,500
|
$ 2,376
|
| Operating expenses: |
|
|
|
|
| Operation and maintenance |
432
|
364
|
1,131
|
1,024
|
| Depreciation and amortization |
119
|
111
|
350
|
327
|
| General taxes |
65
|
60
|
195
|
184
|
| Gain on asset dispositions and purchases |
(5)
|
|
(8)
|
(2)
|
| Total operating expenses, net |
611
|
535
|
1,668
|
1,533
|
| Operating income |
319
|
361
|
832
|
843
|
| Other income (expense): |
|
|
|
|
| Interest, net |
(81)
|
(77)
|
(242)
|
(228)
|
| Other, net |
5
|
3
|
14
|
9
|
| Total other income (expense) |
(76)
|
(74)
|
(228)
|
(219)
|
| Income from continuing operations before income taxes |
243
|
287
|
604
|
624
|
| Provision for income taxes |
95
|
113
|
237
|
247
|
| Net income attributable to common stockholders |
$ 148
|
$ 174
|
$ 367
|
$ 377
|
| Basic earnings per share: |
|
|
|
|
| Net income attributable to common stockholders |
$ 0.83
|
$ 0.97
|
$ 2.06
|
$ 2.10
|
| Diluted earnings per share: |
|
|
|
|
| Net income attributable to common stockholders |
$ 0.83
|
$ 0.96
|
$ 2.05
|
$ 2.09
|
| Weighted-average common shares outstanding: |
|
|
|
|
| Basic |
178
|
179
|
178
|
179
|
| Diluted |
178
|
180
|
179
|
180
|
| Dividends declared per common share |
$ 0.375
|
$ 0.34
|
$ 0.75
|
$ 0.68
|