STATEMENTS OF CONSOLIDATED CASH FLOWS - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating activities:
Net income	$ 4,687.1	$ 4,238.5	$ 2,855.6
Reconciliation of net income to net cash flows provided by operating activities:
Depreciation, amortization and accretion	1,949.3	1,791.6	1,644.0
Asset impairment and related charges	132.8	50.5	49.8
Equity in income of unconsolidated affiliates	(563.0)	(480.0)	(426.0)
Distributions received from unconsolidated affiliates attributable to earnings	568.0	479.4	433.7
Net gains attributable to asset sales	(5.7)	(28.7)	(10.7)
Deferred income tax expense	20.0	21.4	6.1
Change in fair market value of derivative instruments	27.2	17.8	22.8
Change in fair market value of Liquidity Option	119.6	56.1	64.3
Gain on step acquisition of unconsolidated affiliate	0.0	(39.4)	0.0
Non-cash expense related to long-term operating leases	42.8	0.0	0.0
Net effect of changes in operating accounts	(457.4)	16.2	32.2
Other operating activities	(0.2)	2.9	(5.5)
Net cash flows provided by operating activities	6,520.5	6,126.3	4,666.3
Investing activities:
Capital expenditures	(4,531.7)	(4,223.2)	(3,101.8)
Cash used for business combinations, net of cash received	0.0	(150.6)	(198.7)
Investments in unconsolidated affiliates	(111.6)	(113.6)	(50.5)
Distributions received from unconsolidated affiliates attributable to return of capital	63.3	50.0	49.3
Proceeds from asset sales	20.6	161.2	40.1
Other investing activities	(16.1)	(5.4)	(24.5)
Cash used in investing activities	(4,575.5)	(4,281.6)	(3,286.1)
Financing activities:
Borrowings under debt agreements	58,172.6	79,588.7	69,315.3
Repayments of debt	(56,716.5)	(77,957.1)	(68,459.6)
Debt issuance costs	(27.6)	(49.1)	(24.1)
Monetization of interest rate derivative instruments	0.0	22.1	30.6
Cash distributions paid to limited partners	(3,839.8)	(3,726.9)	(3,569.9)
Cash payments made in connection with distribution equivalent rights	(22.1)	(17.7)	(15.1)
Cash distributions paid to noncontrolling interests	(106.2)	(81.6)	(49.2)
Cash contributions from noncontrolling interests	632.8	238.1	0.4
Net cash proceeds from the issuance of common units	82.2	538.4	1,073.4
Repurchase of common units under buyback programs	(81.1)	(30.8)	0.0
Other financing activities	(39.4)	(29.0)	(29.3)
Cash provided by (used in) financing activities	(1,945.1)	(1,504.9)	(1,727.5)
Net change in cash and cash equivalents, including restricted cash	(0.1)	339.8	(347.3)
Cash and cash equivalents, including restricted cash, at beginning of period	410.1	70.3	417.6
Cash and cash equivalents, including restricted cash, at end of period	$ 410.0	$ 410.1	$ 70.3

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Amount of distribution received from equity method investee for return of investment, classified as investing activities. Excludes distribution for return on investment, classified as operating activities.

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The cash inflow from the issuance of common limited partners units during the period.

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The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

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Amount of cash inflow from a noncontrolling interest. Includes, but is not limited to, purchase of additional shares or other increase in noncontrolling interest ownership.

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The cash inflow from the sale of property, plant and equipment (capital expenditures), software, and other intangible assets.

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The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

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The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of open derivatives, commodity, or energy contracts, held at each balance sheet date, that was included in earnings for the period.

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