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CONDENSED STATEMENTS OF CONSOLIDATED CASH FLOWS (USD $)
In Millions
9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
CASH FLOWS FROM OPERATING ACTIVITIES  
Net income$ 1,092[1]$ 432[1]
Adjustments to reconcile net income to net cash provided by operating activities:  
Depreciation and amortization730643
Deferred income taxes and investment tax credits224133
Remeasurement of equity method investments(277) 
Equity earnings(41)224
Fixed-price contracts and other derivatives(7)19
Other adjustments to reconcile net income to net cash provided by operating activities(43)(24)
Net change in other working capital components(108)(77)
Distributions from RBS Sempra Commodities LLP, operating activities53198
Changes in other assets3176
Changes in other liabilities(11)(22)
Net cash provided by operating activities1,6431,602
CASH FLOWS FROM INVESTING ACTIVITIES  
Expenditures for property, plant and equipment(2,031)(1,354)
Expenditures for investments(696)(385)
Distributions from RBS Sempra Commodities LLP, investing activities374849
Distributions from investments47259
Purchases of nuclear decommissioning and other trust assets(399)(261)
Proceeds from sales by nuclear decommissioning and other trusts398261
Decrease in restricted cash47355
Increase in restricted cash(450)(51)
Other cash flows from investing activities(20)(6)
Net cash used in investing activities(2,304)(633)
CASH FLOWS FROM FINANCING ACTIVITIES  
Common dividends paid(325)(269)
Preferred dividends paid by subsidiaries(6)(7)
Issuances of common stock2229
Repurchases of common stock(18)(502)
Redemption of subsidiary preferred stock(80) 
Issuances of debt (maturities greater than 90 days)1,525771
Payments on debt (maturities greater than 90 days)(366)(727)
Increase (decrease) in short-term debt, net(300)184
Purchase of noncontrolling interests(43) 
Other cash flows from financing activities(5)(11)
Net cash provided by (used in) financing activities404(532)
Effect of exchange rate changes on cash and cash equivalents2 
Increase (decrease) in cash and cash equivalents(255)437
Cash and cash equivalents, beginning of period912[2]110
Cash and cash equivalents, end of period657547
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION  
Interest payments, net of amounts capitalized281264
Income tax payments, net of refunds10632
Acquisition Of Business [Abstract]  
Assets acquired2,831303
Cash paid, net of cash acquired(611)(292)
Fair of equity method investments immediately prior to the acquisition(882) 
Fair value of noncontrolling interests(279) 
Additional consideration accrued(32)0
Liabilities assumed1,02711
Increase in capital lease obligations for investments in property, plant and equipment0183
Accrued capital expenditures306294
Dividends declared but not paid11997
San Diego Gas and Electric Company and Subsidiary [Member]
  
CASH FLOWS FROM OPERATING ACTIVITIES  
Net income283234
Adjustments to reconcile net income to net cash provided by operating activities:  
Utility depreciation and amortization316283
Deferred income taxes and investment tax credits226125
Fixed-price contracts and other derivatives(13)42
Other adjustments to reconcile net income to net cash provided by operating activities(43)(24)
Net change in other working capital components18(247)
Changes in other assets3215
Changes in other liabilities (12)
Net cash provided by operating activities819416
CASH FLOWS FROM INVESTING ACTIVITIES  
Expenditures for property, plant and equipment(1,162)(822)
Purchases of nuclear decommissioning and other trust assets(395)(256)
Proceeds from sales by nuclear decommissioning and other trusts389248
Increase (decrease) in loans to affiliates, net 13
Decrease in restricted cash34055
Increase in restricted cash(355)(51)
Net cash used in investing activities(1,183)(813)
CASH FLOWS FROM FINANCING ACTIVITIES  
Capital contribution200 
Preferred dividends paid(4)(4)
Issuances of long-term debt348744
Payments on long-term debt(7)(7)
Distributions to noncontrolling interests5(10)
Other cash flows from financing activities(2)(7)
Net cash provided by (used in) financing activities540716
Increase (decrease) in cash and cash equivalents176319
Cash and cash equivalents, beginning of period127[2]13
Cash and cash equivalents, end of period303332
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION  
Interest payments, net of amounts capitalized8067
Income tax payments, net of refunds5961
Acquisition Of Business [Abstract]  
Increase in capital lease obligations for investments in property, plant and equipment 183
Accrued capital expenditures161102
Dividends declared but not paid11
Southern California Gas Company [Member]
  
CASH FLOWS FROM OPERATING ACTIVITIES  
Net income209213
Adjustments to reconcile net income to net cash provided by operating activities:  
Utility depreciation and amortization246230
Deferred income taxes and investment tax credits7962
Other adjustments to reconcile net income to net cash provided by operating activities(4)2
Net change in other working capital components(46)62
Changes in other assets176
Changes in other liabilities(6)(6)
Net cash provided by operating activities495569
CASH FLOWS FROM INVESTING ACTIVITIES  
Expenditures for property, plant and equipment(499)(337)
Increase (decrease) in loans to affiliates, net(96)(108)
Net cash used in investing activities(595)(445)
CASH FLOWS FROM FINANCING ACTIVITIES  
Common dividends paid(50)(100)
Preferred dividends paid(1)(1)
Payments on long-term debt(250) 
Net cash provided by (used in) financing activities(301)(101)
Increase (decrease) in cash and cash equivalents(401)23
Cash and cash equivalents, beginning of period417[2]49
Cash and cash equivalents, end of period1672
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION  
Interest payments, net of amounts capitalized3937
Income tax payments, net of refunds1763
Acquisition Of Business [Abstract]  
Accrued capital expenditures$ 81$ 63
[1]Before preferred dividends of subsidiaries.
[2]Derived from audited financial statements.