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UNAUDITED CONDENSED STATEMENTS OF CONSOLIDATED CASH FLOWS - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Operating activities:    
Net income $ 1,240.2 $ 1,207.2
Reconciliation of net income to net cash flows provided by operating activities:    
Depreciation, amortization and accretion 763.4 774.9
Asset impairment charges 15.2 112.3
Loss due to Pascagoula fire 7.1 0.0
Equity in income of unconsolidated affiliates (177.5) (199.4)
Distributions received on earnings from unconsolidated affiliates 195.1 265.5
Net losses attributable to asset sales 6.6 2.4
Deferred income tax expense (benefit) 4.3 (11.7)
Change in fair market value of derivative instruments 68.3 (9.9)
Change in fair market value of Liquidity Option Agreement 21.1 11.5
Net effect of changes in operating accounts (294.6) (250.7)
Other operating activities (4.0) (0.5)
Net cash flows provided by operating activities 1,845.2 1,901.6
Investing activities:    
Capital expenditures (1,880.4) (1,638.0)
Contributions in aid of construction costs 23.6 7.8
Increase in restricted cash (356.7) (46.1)
Investments in unconsolidated affiliates (92.4) (114.1)
Distributions received for return of capital from unconsolidated affiliates 39.4 0.0
Proceeds from asset sales 27.9 5.9
Other investing activities 0.0 (4.8)
Cash used in investing activities (2,238.6) (1,789.3)
Financing activities:    
Borrowings under debt agreements 33,235.3 13,838.3
Repayments of debt (32,986.7) (12,905.0)
Debt issuance costs (9.7) (18.6)
Cash distributions paid to limited partners (1,610.5) (1,437.3)
Cash payments made in connection with distribution equivalent rights (5.3) (3.4)
Cash distributions paid to noncontrolling interests (20.8) (24.8)
Cash contributions from noncontrolling interests 16.0 22.0
Net cash proceeds from the issuance of common units 1,888.3 944.1
Other financing activities (18.7) (50.9)
Cash provided by (used in) financing activities 487.9 364.4
Net change in cash and cash equivalents 94.5 476.7
Cash and cash equivalents, beginning balance 19.0 74.4
Cash and cash equivalents, ending balance $ 113.5 $ 551.1