|
Consolidated Statement of Changes in Equity (Unaudited) (USD $)
In Millions
|
Total
|
Limited Partners
Class D [Member]
|
Limited Partners
Common units
|
Limited Partners
Common Class B [Member]
|
General Partner
|
Accumulated Other Comprehensive Income (Loss)
|
Total Partners' Equity
|
Noncontrolling Interests
|
| Beginning Balance at Dec. 31, 2014 |
$ 28,685 |
$ 1,011 |
$ 10,367 |
$ 0 |
$ 9,214 |
$ 2 |
$ 20,594 |
$ 8,091 |
| Net income |
112 |
1 |
(104) |
(4) |
196 |
0 |
89 |
23 |
| Other comprehensive income (loss) |
(87) |
0 |
0 |
0 |
0 |
(87) |
(87) |
0 |
| Contributions from The Williams Companies, Inc - net (Note 1) |
20 |
0 |
12,254 |
823 |
(6,573) |
0 |
6,504 |
(6,484) |
| Amortization of beneficial conversion feature of Class D units |
0 |
68 |
(68) |
0 |
0 |
0 |
0 |
0 |
| Conversion Of Class D Units To Common Units (Note 4) |
0 |
(1,080) |
1,080 |
0 |
0 |
0 |
0 |
0 |
| Cash distributions |
(725) |
0 |
(499) |
0 |
(226) |
0 |
(725) |
0 |
| Contributions from general partner |
4 |
0 |
0 |
0 |
4 |
0 |
4 |
0 |
| Contributions from noncontrolling interests |
25 |
0 |
0 |
0 |
0 |
0 |
0 |
25 |
| Distributions to Noncontrolling Interests |
(13) |
0 |
0 |
0 |
0 |
0 |
0 |
(13) |
| Other |
6 |
0 |
5 |
0 |
(2) |
0 |
3 |
3 |
| Net increase (decrease) in equity |
(658) |
(1,011) |
12,668 |
819 |
(6,601) |
(87) |
5,788 |
(6,446) |
| Ending Balance at Mar. 31, 2015 |
$ 28,027 |
$ 0 |
$ 23,035 |
$ 819 |
$ 2,613 |
$ (85) |
$ 26,382 |
$ 1,645 |