v3.10.0.1
Consolidated Statments of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Operating Activities:      
Net income $ 1,333,925 $ 869,531 $ 802,771
Adjustments to reconcile net income to net cash provided by operating activities:      
Depreciation and amortization expense 265,077 196,630 178,142
Gain on sale and retirement of assets (328,055) (5,135) (16,954)
Earnings of non-controlled entities (181,117) (120,994) (78,696)
Distributions from operations of non-controlled entities 196,686 146,211 87,987
Equity-based incentive compensation expense 32,053 20,641 19,358
Settlement cost, amortization of prior service credit and actuarial loss 12,135 8,650 2,211
Changes in components of operating assets and liabilities (Note 4) 22,246 15,695 (21,515)
Net cash provided by operating activities 1,352,950 1,131,229 973,304
Investing Activities:      
Additions to property, plant and equipment [1] (552,257) (558,669) (674,159)
Proceeds from sale and disposition of assets 576,568 44,392 7,552
Investments in non-controlled entities (216,424) (134,828) (200,023)
Distributions from returns of investments in non-controlled entities 1,786 55,931 0
Deposits received from undivided joint interest third party 71,071 0 0
Net cash used by investing activities (119,256) (593,174) (866,630)
Financing Activities:      
Distributions paid (865,431) (803,216) (739,157)
Net commercial paper repayments 0 (49,986) (229,975)
Borrowings under long-term notes 0 496,705 1,142,997
Payments on notes (250,000) 0 (250,000)
Debt placement costs (404) (6,316) (10,906)
Net receipt (payment) on financial derivatives 24,619 0 (19,287)
Payments associated with settlement of equity-based incentive compensation (9,285) (13,875) (14,376)
Net cash used by financing activities (1,100,501) (376,688) (120,704)
Change in cash, cash equivalents and restricted cash 133,193 161,367 (14,030)
Cash, cash equivalents and restricted cash at beginning of period 176,068 14,701 28,731
Cash, cash equivalents and restricted cash at end of period 309,261 176,068 14,701
Noncash Investing and Financing Items [Abstract]      
Contribution of property, plant and equipment to a non-controlled entity 0 97,638 0
Issuance of limited partner units in settlement of equity-based incentive plan awards 120 1,669 7,289
Additions to property, plant and equipment (562,296) (572,744) (653,528)
Changes in accounts payable and other current liabilities related to capital expenditures 10,039 14,075 (20,631)
Additions to property, plant and equipment, net [1] $ (552,257) $ (558,669) $ (674,159)
[1] (1) Additions to property, plant and equipment$(653,528)$(572,744)$(562,296)Changes in accounts payable and other current liabilities related to capital expenditures (20,631)14,07510,039Additions to property, plant and equipment, net $(674,159)$(558,669)$(552,257)