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Quarterly Financial Data (Unaudited) | 12 Months Ended
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Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract] |
Quarterly Financial Data (Unaudited) | Quarterly Financial Data (Unaudited)
| First Quarter |  | Second Quarter |  | Third Quarter |  | Fourth Quarter |  | Total (1)
| (in millions, except per share data)
2020 |  |  |  |  |  |  |  |  |
Total revenues | $ | 8,269 |  |  | $ | 3,225 |  |  | $ | 5,833 |  |  | $ | 5,963 |  |  | $ | 23,290 |
Gross margin (2) | $ | (190) |  |  | $ | 282 |  |  | $ | 313 |  |  | $ | 4 |  |  | $ | 408 |
Operating income/(loss) | $ | (2,775) |  |  | $ | 208 |  |  | $ | 251 |  |  | $ | (67) |  |  | $ | (2,383) |
Net income/(loss) | $ | (2,692) |  |  | $ | 137 |  |  | $ | 139 |  |  | $ | (23) |  |  | $ | (2,440) |
Net income/(loss) attributable to PAGP | $ | (581) |  |  | $ | 16 |  |  | $ | 17 |  |  | $ | (20) |  |  | $ | (568) |
Basic net income/(loss) per Class A share | $ | (3.18) |  |  | $ | 0.09 |  |  | $ | 0.09 |  |  | $ | (0.11) |  |  | $ | (3.06) |
Diluted net income/(loss) per Class A share | $ | (3.18) |  |  | $ | 0.09 |  |  | $ | 0.09 |  |  | $ | (0.11) |  |  | $ | (3.07) |
Cash distributions per Class A share (3) | $ | 0.36 |  |  | $ | 0.18 |  |  | $ | 0.18 |  |  | $ | 0.18 |  |  | $ | 0.90 |
|  |  | 0 |  |  |  |  |  |
2019 |  |  |  |  |  |  |  |  |
Total revenues | $ | 8,375 |  |  | $ | 8,253 |  |  | $ | 7,886 |  |  | $ | 9,154 |  |  | $ | 33,669 |
Gross margin (2) | $ | 790 |  |  | $ | 525 |  |  | $ | 565 |  |  | $ | 402 |  |  | $ | 2,282 |
Operating income | $ | 713 |  |  | $ | 449 |  |  | $ | 490 |  |  | $ | 329 |  |  | $ | 1,980 |
Net income | $ | 914 |  |  | $ | 426 |  |  | $ | 431 |  |  | $ | 291 |  |  | $ | 2,062 |
Net income attributable to PAGP | $ | 147 |  |  | $ | 66 |  |  | $ | 70 |  |  | $ | 48 |  |  | $ | 331 |
Basic net income per Class A share | $ | 0.92 |  |  | $ | 0.41 |  |  | $ | 0.41 |  |  | $ | 0.26 |  |  | $ | 1.97 |
Diluted net income per Class A share | $ | 0.92 |  |  | $ | 0.40 |  |  | $ | 0.41 |  |  | $ | 0.26 |  |  | $ | 1.96 |
Cash distributions per Class A share (3) | $ | 0.30 |  |  | $ | 0.36 |  |  | $ | 0.36 |  |  | $ | 0.36 |  |  | $ | 1.38 |
(1)The sum of the four quarters may not equal the total year due to rounding. (2)Gross margin is calculated as Total revenues less (i) Purchases and related costs, (ii) Field operating costs, (iii) Depreciation and amortization and (iv) (Gains)/losses on asset sales and asset impairments, net. (3)Represents cash distributions declared and paid in the period presented.

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- Definition The entire disclosure for quarterly financial data. Includes, but is not limited to, tabular presentation of financial information for fiscal quarters, effect of year-end adjustments, and an explanation of matters or transactions that affect comparability of the information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -URI http://asc.fasb.org/topic&trid=2126967 + Details
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