Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Operating Activities:
Net income	$ 611,999	$ 587,434
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization expense	124,180	122,462
Debt placement fee amortization expense	1,867	1,767
Loss on sale and retirement of assets	4,378	4,830
Earnings of non-controlled entities	(49,653)	(4,066)
Distributions from investments in non-controlled entities	47,236	2,398
Equity-based incentive compensation expense	15,226	17,731
Amortization of prior service credit, actuarial loss and pension settlement	2,609	1,849
Changes in operating assets and liabilities:
Trade accounts receivable and other accounts receivable	(24,601)	10,929
Inventory	22,581	(15,251)
Energy commodity derivatives contracts, net of derivatives deposits	(11,402)	(17,540)
Accounts payable	12,226	6,483
Accrued payroll and benefits	452	(669)
Accrued interest payable	(841)	(574)
Accrued taxes other than income	6,334	6,596
Accrued product purchases	(23,947)	(8,584)
Deferred revenue	4,141	7,484
Current and noncurrent environmental liabilities	(4,864)	(1,172)
Other current and noncurrent assets and liabilities	(13,817)	(8,792)
Net cash provided by operating activities	724,104	713,315
Investing Activities:
Additions to property, plant and equipment, net(1)	(431,260)	(234,763)
Proceeds from sale and disposition of assets	3,178	264
Acquisition of business	(54,678)	0
Investments in non-controlled entities	(133,373)	(378,220)
Distributions in excess of earnings of non-controlled entities	9,341	3,918
Net cash used by investing activities	(606,792)	(608,801)
Financing Activities:
Distributions paid	(489,535)	(417,238)
Net commercial paper borrowings (repayments)	(69,976)	315,967
Borrowings under long-term notes	499,589	257,713
Payments on notes	0	(250,000)
Debt placement costs	(4,754)	(2,912)
Net payment on financial derivatives	(42,908)	(3,613)
Settlement of tax withholdings on long-term incentive compensation	(17,784)	(14,813)
Net cash used by financing activities	(125,368)	(114,896)
Change in cash and cash equivalents	(8,056)	(10,382)
Cash and cash equivalents at beginning of period	17,063	25,235
Cash and cash equivalents at end of period	9,007	14,853
Supplemental non-cash investing and financing activities:
Contribution of property, plant and equipment to a non-controlled entity	13,252	0
Issuance of limited partner units in settlement of equity-based incentive plan awards	8,045	7,315
Additions to property, plant and equipment	(439,721)	(237,240)
Changes in accounts payable and other current liabilities related to capital expenditures	8,461	2,477
Additions to property, plant and equipment	$ (431,260)	$ (234,763)