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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Operating Activities      
Net income $ 576,961 $ 743,530 $ 759,744
Adjustments to reconcile net income to net cash provided by operating activities:      
Depreciation and amortization 384,377 335,852 312,288
Charges attributable to exit activities, net of settlements 121,971 0 0
Impairment of goodwill 0 10,255 0
Gain on sale of discontinued operations 0 (13,517) 0
Equity earnings from investments (110,517) (123,024) (127,246)
Distributions received from unconsolidated affiliates 106,364 120,442 132,741
Deferred income taxes 151,515 229,398 256,688
Share-based compensation expense 46,194 36,692 66,371
Pension and other postretirement benefit expense, net of contributions 56,600 (57,073) (29,863)
Allowance for equity funds used during construction (30,522) (13,648) (2,335)
Loss (gain) on sale of assets (11,881) (6,736) 963
Other (5,656) 27,982 (1,471)
Changes in assets and liabilities:      
Accounts receivable (189,809) (14,774) (55,861)
Natural gas and natural gas liquids in storage 99,937 33,343 65,845
Accounts payable 165,076 (30,981) 102,621
Commodity imbalances, net (52,233) 43,471 (54,886)
Energy marketing and risk management assets and liabilities 25,072 (174,953) (31,999)
Other assets and liabilities (38,682) (162,264) (37,434)
Cash provided by operating activities 1,294,767 983,995 1,356,166
Investing Activities      
Capital expenditures (less allowance for equity funds used during construction) 2,256,585 1,866,153 1,336,067
Acquisitions (394,889) 0 0
Proceeds from sale of discontinued operations, net of cash sold 0 32,946 0
Contributions to unconsolidated affiliates (35,308) (30,768) (64,491)
Distributions received from unconsolidated affiliates 31,134 35,299 23,644
Proceeds from sale of assets 13,617 12,240 1,288
Other 0 2,237 4,000
Cash used in investing activities (2,642,031) (1,814,199) (1,371,626)
Financing Activities      
Borrowing (repayment) of notes payable, net (252,708) (24,812) 285,127
Issuance of debt, net of discounts 1,247,822 1,994,693 1,295,450
Long-term debt financing costs (10,246) (15,036) (10,986)
Repayment of debt (7,868) (361,464) (727,562)
Repurchase of common stock 0 (150,000) (300,108)
Issuance of common stock 20,602 15,969 17,906
Issuance of common units, net of issuance costs 583,929 459,587 0
Dividends paid (304,742) (261,969) (227,020)
Distributions to noncontrolling interests (374,142) (324,906) (277,375)
Excess tax benefit from stock-based awards 10,312 6,948 3,806
Cash provided by financing activities 912,959 1,339,010 59,238
Change in cash and cash equivalents (434,305) 508,806 43,778
Change in cash and cash equivalents included in discontinued operations 2,848 11,532 (13,284)
Change in cash and cash equivalents from continuing operations (431,457) 520,338 30,494
Cash and cash equivalents at beginning of period 577,022 56,684 26,190
Cash and cash equivalents at end of period 145,565 577,022 56,684
Supplemental cash flow information:      
Cash paid for interest, net of amounts capitalized 294,240 439,398 278,162
Cash paid (refunds received) for income taxes $ (16,640) $ 872 $ (68,696)