Consolidated Statements of Operations - USD ($)
$ in Millions |
12 Months Ended |
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
| Income Statement [Abstract] |
|
|
|
|
| Operating revenues |
|
$ 3,610
|
$ 3,440
|
$ 3,357
|
| Operating expenses: |
|
|
|
|
| Operation and maintenance |
|
1,544
|
1,479
|
1,369
|
| Depreciation and amortization |
|
582
|
545
|
492
|
| General taxes |
|
280
|
277
|
259
|
| Loss (gain) on asset dispositions and purchases |
|
34
|
(20)
|
(16)
|
| Impairment charge |
|
0
|
57
|
0
|
| Total operating expenses, net |
|
2,440
|
2,338
|
2,104
|
| Operating income |
|
1,170
|
1,102
|
1,253
|
| Other income (expense): |
|
|
|
|
| Interest, net |
|
(382)
|
(350)
|
(342)
|
| Non-operating benefit costs, net |
|
16
|
20
|
(9)
|
| Loss on early extinguishment of debt |
|
(4)
|
(4)
|
(7)
|
| Other, net |
|
33
|
19
|
17
|
| Total other income (expense) |
|
(337)
|
(315)
|
(341)
|
| Income before income taxes |
|
833
|
787
|
912
|
| Provision for income taxes |
|
212
|
222
|
486
|
| Consolidated net income |
|
621
|
565
|
426
|
| Net loss attributable to noncontrolling interest |
|
0
|
(2)
|
0
|
| Net income attributable to common shareholders |
|
$ 621
|
$ 567
|
$ 426
|
| Basic earnings per share: |
|
|
|
|
| Net income attributable to common shareholders (USD per share) |
[1] |
$ 3.44
|
$ 3.16
|
$ 2.39
|
| Diluted earnings per share: |
|
|
|
|
| Net income attributable to common shareholders (USD per share) |
[1] |
$ 3.43
|
$ 3.15
|
$ 2.38
|
| Weighted average common shares outstanding: |
|
|
|
|
| Basic (in shares) |
|
181,000,000
|
180,000,000
|
178,000,000
|
| Diluted (Shares) |
|
181,000,000
|
180,000,000
|
179,000,000
|
|
|