| In millions, except per share items | Dec-31-21 | Dec-31-20 | Dec-31-19 | Dec-31-18 | Dec-05-18 | Dec-31-17 | Dec-31-16 | Dec-31-15 |
| | 10-K | 10-K | 10-K | 10-K | 8-K | 10-K | 10-K | 10-K |
| OPERATING ACTIVITIES: | | | | | | | | |
| Net (loss) income | 395.0 | -302.0 | 21.0 | 302.0 | | 234.0 | 94.0 | -866.0 |
| Adjustments to reconcile net income to net cash from operating activities: | | | | | | | | |
| Depreciation and amortization expense | 364.0 | 376.0 | 404.0 | 388.0 | | 379.0 | 378.0 | 377.0 |
| Earnings from unconsolidated affiliates | -535.0 | -447.0 | -474.0 | -370.0 | | -303.0 | -282.0 | -184.0 |
| Distributions from unconsolidated affiliates | 604.0 | 631.0 | 540.0 | 441.0 | | 367.0 | 356.0 | 217.0 |
| Net unrealized (gains) losses on derivative instruments | 125.0 | -55.0 | 78.0 | -108.0 | | 28.0 | 139.0 | -46.0 |
| Loss on sale of assets, net | 5.0 | | 80.0 | | | -34.0 | 35.0 | -42.0 |
| Loss from financing activities | | | | | | | | |
| Other, net | 26.0 | 22.0 | 21.0 | -15.0 | | -32.0 | 68.0 | -68.0 |
| Change in operating assets and liabilities, which (used) provided cash, net of effects of acquisitions: | | | | | | | | |
| Accounts receivable | -605.0 | 62.0 | 170.0 | 55.0 | | 194.0 | -247.0 | 479.0 |
| Inventories | -39.0 | 3.0 | 9.0 | 11.0 | | -4.0 | 21.0 | -29.0 |
| Accounts payable | 478.0 | -47.0 | -133.0 | -168.0 | | 328.0 | 199.0 | -381.0 |
| Decrease in Other Operating Assets and Liabilities, Net | -203.0 | 110.0 | -104.0 | 64.0 | | 7.0 | -4.0 | 15.0 |
| Net cash provided by operating activities | 646.0 | 1,099.0 | 859.0 | 662.0 | | 896.0 | 645.0 | 442.0 |
| INVESTING ACTIVITIES: | | | | | | | | |
| Capital expenditures | -108.0 | -160.0 | -519.0 | -595.0 | | -375.0 | -144.0 | -811.0 |
| Business Combination, Consideration Transferred | | | | | | | | |
| Payments to Acquire Equity Method Investments | -5.0 | -107.0 | -450.0 | | | | | |
| Proceeds from Equity Method Investment, Distribution, Return of Capital | | | | | | | | |
| Proceeds from sale of assets | 3.0 | 2.0 | 209.0 | 4.0 | | 132.0 | 163.0 | 164.0 |
| Net cash used in investing activities | -110.0 | -259.0 | -760.0 | -945.0 | | -391.0 | -34.0 | -711.0 |
| |
| FINANCING ACTIVITIES: | | | | | | | | |
| Proceeds from debt | 4,721.0 | 4,407.0 | 5,971.0 | 5,161.0 | | 116.0 | 3,353.0 | 7,216.0 |
| Payments of debt | -4,916.0 | -4,713.0 | -5,372.0 | 4,560.0 | | 811.0 | -3,628.0 | -7,196.0 |
| Costs incurred to redeem senior notes | | | | | | | | |
| GP and IDR Conversion Costs | | | | | | | | |
| Proceeds from Issuance of Preferred Limited Partners Units | | | | | | | | |
| Payments of Debt Issuance Costs | -6.0 | -8.0 | 13.0 | 7.0 | | | | |
| Proceeds from (Payments for) Other Financing Activities | | | | | | | | |
| Net cash provided by (used in) financing activities | -591.0 | -785.0 | -99.0 | 128.0 | | -350.0 | -613.0 | 245.0 |
| |
| Net change in cash and cash equivalents | | | | | | | | |
| Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect | -55.0 | 55.0 | | -155.0 | | | | |
| Cash and cash equivalents, end of period | 1.0 | 52.0 | 1.0 | 1.0 | | 156.0 | 1.0 | 2.0 |
| |
| Restricted Cash, Noncurrent | | | | | | | | |