Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Operating Activities:
Net income	$ 589,480	$ 611,999
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization expense	134,137	124,180
Loss on sale and retirement of assets	5,397	4,378
Earnings of non-controlled entities	(51,543)	(49,653)
Distributions of earnings from investments in non-controlled entities	50,047	47,236
Equity-based incentive compensation expense	14,737	15,226
Settlement cost, amortization of prior service credit and actuarial loss	1,427	2,609
Gain on exchange of interest in non-controlled entity	(28,144)	0
Changes in operating assets and liabilities:
Trade accounts receivable and other accounts receivable	(49,014)	(24,601)
Inventory	7,857	22,581
Energy commodity derivatives contracts, net of derivatives deposits	637	(11,402)
Accounts payable	5,850	12,226
Accrued payroll and benefits	(12,725)	452
Accrued interest payable	(2,393)	(841)
Accrued taxes other than income	2,115	6,334
Accrued product purchases	(6,183)	(23,947)
Deferred revenue	17,191	4,141
Current and noncurrent environmental liabilities	(5,649)	(4,864)
Other current and noncurrent assets and liabilities	(34,229)	(11,950)
Net cash provided by operating activities	638,995	724,104
Investing Activities:
Additions to property, plant and equipment, net(1)	(517,810)	(431,260)
Proceeds from sale and disposition of assets	6,098	3,178
Acquisition of business	0	(54,678)
Investments in non-controlled entities	(174,900)	(133,373)
Distributions in excess of earnings of non-controlled entities	4,500	9,341
Net cash used by investing activities	(682,112)	(606,792)
Financing Activities:
Distributions paid	(548,388)	(489,535)
Net commercial paper repayments	(244,963)	(69,976)
Borrowings under long-term notes	1,142,997	499,589
Debt placement costs	(10,500)	(4,754)
Net payment on financial derivatives	(19,287)	(42,908)
Settlement of tax withholdings on long-term incentive compensation	(14,376)	(17,784)
Net cash provided (used) by financing activities	305,483	(125,368)
Change in cash and cash equivalents	262,366	(8,056)
Cash and cash equivalents at beginning of period	28,731	17,063
Cash and cash equivalents at end of period	291,097	9,007
Supplemental non-cash investing and financing activities:
Contribution of property, plant and equipment to a non-controlled entity	0	13,252
Issuance of limited partner units in settlement of equity-based incentive plan awards	7,092	8,045
(1) Additions to property, plant and equipment	(514,205)	(439,721)
Changes in accounts payable and other current liabilities related to capital expenditures	(3,605)	8,461
Additions to property, plant and equipment, net	$ (517,810)	$ (431,260)