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Schedule I, Condensed Financial Statements of Xcel Energy Inc, Condensed Statements of Cash Flows (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Operating activities |  |  |
Net cash provided by (used in) operating activities | $ 3,122 | $ 3,126 | $ 3,052
Investing activities |  |  |
Net cash provided by (used in) investing activities | (3,986) | (3,296) | (3,261)
Financing activities |  |  |
Proceeds from (repayment of) short-term borrowings, net | 225 | 422 | (454)
Proceeds from issuance of long-term debt | 1,675 | 1,518 | 2,424
Repayment of long-term debt | (452) | (1,030) | (1,036)
Proceeds from issuance of common stock | 230 | 0 | 0
Repurchases of common stock | (1) | (3) | (32)
Dividends paid | (730) | (721) | (681)
Other, net | (19) | (18) | (12)
Net cash provided by (used in) financing activities | 928 | 168 | 209
Net change in cash and cash equivalents | 64 | (2) | 0
Cash and cash equivalents at beginning of period | 83 | 85 | 85
Cash and cash equivalents at end of period | 147 | 83 | 85
Xcel Energy Inc. |  |  |
Operating activities |  |  |
Net cash provided by (used in) operating activities | 1,210 | 1,208 | 817
Investing activities |  |  |
Capital contributions to subsidiaries | (809) | (849) | (414)
Investments in the utility money pool | (2,578) | (1,258) | (1,880)
Return of investments in the utility money pool | 2,493 | 1,173 | 1,880
Net cash provided by (used in) investing activities | (894) | (934) | (414)
Financing activities |  |  |
Proceeds from (repayment of) short-term borrowings, net | (295) | 715 | (516)
Proceeds from issuance of long-term debt | 492 | 0 | 1,539
Repayment of long-term debt | 0 | (250) | (704)
Proceeds from issuance of common stock | 230 | 0 | 0
Repurchases of common stock | (1) | (3) | (32)
Dividends paid | (730) | (721) | (681)
Other, net | (12) | (14) | (9)
Net cash provided by (used in) financing activities | (316) | (273) | (403)
Net change in cash and cash equivalents | 0 | 1 | 0
Cash and cash equivalents at beginning of period | 1 |  | $ 0
Cash and cash equivalents at end of period | $ 1 | $ 1 |

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