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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Operating activities      
Net income $ 1,499,706 $ 612,809 $ 1,278,577
Adjustments to reconcile net income to net cash provided by operating activities:      
Depreciation and amortization 621,701 578,662 476,535
Impairment charges 0 644,930 0
Equity in net earnings from investments (122,520) (143,241) (154,541)
Distributions received from unconsolidated affiliates 123,010 144,352 163,476
Deferred income tax expense 472,057 186,730 372,729
Other, net 94,091 35,327 (26,101)
Changes in assets and liabilities:      
Accounts receivable (610,531) (1,297) (19,688)
NGLs and natural gas in storage, net of commodity imbalances (105,038) 172,316 (10,193)
Accounts payable 622,425 (80,257) (62,946)
Risk-management assets and liabilities (93,713) (187,458) (86,268)
Other assets and liabilities, net 45,084 (63,805) 15,199
Cash provided by operating activities 2,546,272 1,899,068 1,946,779
Investing activities      
Capital expenditures (less allowance for equity funds used during construction) (696,854) (2,195,381) (3,848,349)
Distributions received from unconsolidated affiliates in excess of cumulative earnings 19,363 31,808 94,168
Other, net 12,199 (106,956) (14,577)
Cash used in investing activities (665,292) (2,270,529) (3,768,758)
Financing activities      
Dividends paid (1,667,431) (1,605,366) (1,457,628)
Borrowing (repayment) of short-term borrowings, net 0 (220,000) 220,000
Issuance of long-term debt, net of discounts 0 3,244,777 4,185,435
Repayment of long-term debt (604,894) (1,457,222) (1,057,348)
Issuance of common stock 32,791 969,759 29,040
Other (19,551) (56,949) (88,537)
Cash provided by (used in) financing activities (2,259,085) 874,999 1,830,962
Change in cash and cash equivalents (378,105) 503,538 8,983
Cash and cash equivalents at beginning of period 524,496 20,958 11,975
Cash and cash equivalents at end of period 146,391 524,496 20,958
Supplemental cash flow information:      
Cash paid for interest, net of amounts capitalized 691,897 760,984 435,165
Cash paid for income taxes, net of refunds $ 8,864 $ 342 $ 2,690