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UNAUDITED CONDENSED STATEMENTS OF CONSOLIDATED CASH FLOWS (USD $) In Millions, unless otherwise specified | 9 Months Ended
--- | ---
Sep. 30, 2013 | Sep. 30, 2012
Operating activities: |  |
Net income | $ 1,901.4 | $ 1,810.6
Reconciliation of net income to net cash flows provided by operating activities: |  |
Depreciation, amortization and accretion | 902.3 | 817.9
Non-cash asset impairment charges | 53.3 | 57.6
Equity in income of unconsolidated affiliates | (126.1) | (42.2)
Distributions received from unconsolidated affiliates | 187.6 | 67.5
Gains attributable to asset sales and insurance recoveries (see Note 16) | (68.4) | (102.9)
Deferred income tax expense (benefit) | 32.1 | (67.9)
Changes in fair market value of derivative instruments | (5.3) | (15.9)
Net effect of changes in operating accounts (see Note 16) | (513.9) | (910.2)
Other operating activities | 3.2 | 1.3
Net cash flows provided by operating activities | 2,366.2 | 1,615.8
Investing activities: |  |
Capital expenditures | (2,413.2) | (2,716.1)
Contributions in aid of construction costs | 19.9 | 18.2
Decrease (increase) in restricted cash | (31.6) | 19.7
Investments in unconsolidated affiliates | (768.4) | (351.8)
Proceeds from asset sales and insurance recoveries (see Note 16) | 256.3 | 1,167.4
Other investing activities | (0.5) | (32.4)
Cash used in investing activities | (2,937.5) | (1,895.0)
Financing activities: |  |
Borrowings under debt agreements | 10,139.2 | 7,141.4
Repayments of debt | (8,791.6) | (5,716.0)
Debt issuance costs | (23.7) | (20.7)
Monetization of interest rate derivative instruments (see Note 4) | (168.8) | (147.8)
Cash distributions paid to limited partners (see Note 10) | (1,778.3) | (1,613.4)
Cash distributions paid to noncontrolling interests | (6.4) | (11.3)
Cash contributions from noncontrolling interests (see Note 10) | 104.2 | 6.5
Net cash proceeds from issuance of common units | 1,134.7 | 658.6
Acquisition of treasury units | (36.1) | (19.6)
Other financing activities | (8.4) | (3.8)
Cash provided by (used in) financing activities | 564.8 | 273.9
Net change in cash and cash equivalents | (6.5) | (5.3)
Cash and cash equivalents, January 1 | 16.1 | 19.8
Cash and cash equivalents, September 30 | $ 9.6 | $ 14.5

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- Definition The cash inflow from the issuance of common limited partners units during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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- Definition The cash inflow from a borrowing supported by a written promise to pay an obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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