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v3.20.4

Condensed Parent Company Financial Statements (Condensed Statements of Cash Flows) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Net cash flows from operating activities | $ 501.0 | $ 660.0 | $ 528.0
Cash flows used for investing activities: |  |  |
Other | (43.0) | (60.0) | (38.0)
Net cash flows used for investing activities | (951.0) | (1,287.0) | (1,067.0)
Cash flows used for financing activities: |  |  |
Common stock dividends | (377.0) | (337.0) | (312.0)
Proceeds from issuance of common stock, net | 247.0 | 390.0 | 197.0
Net change in commercial paper | 52.0 | (104.0) | 26.0
Other | (27.0) | (24.0) | (24.0)
Net cash flows from (used for) financing activities | 488.0 | 619.0 | 531.0
Net increase (decrease) in cash, cash equivalents and restricted cash | 38.0 | (8.0) | (8.0)
Cash, cash equivalents and restricted cash at beginning of period | 18.0 | 26.0 | 34.0
Cash, cash equivalents and restricted cash at end of period | 56.0 | 18.0 | 26.0
Supplemental cash flows information: |  |  |
Interest | (274.0) | (268.0) | (247.0)
Income taxes, net | 5.0 | 21.0 | (5.0)
Parent Company [Member] |  |  |
Net cash flows from operating activities | 396.0 | 305.0 | 311.0
Cash flows used for investing activities: |  |  |
Capital contributions to consolidated subsidiaries | (429.0) | (250.0) | (625.0)
Net change in notes receivable from and payable to affiliates | 201.0 | 8.0 | 441.0
Net cash flows used for investing activities | (228.0) | (242.0) | (184.0)
Cash flows used for financing activities: |  |  |
Common stock dividends | (377.0) | (338.0) | (312.0)
Proceeds from issuance of common stock, net | 247.0 | 390.0 | 197.0
Net change in commercial paper | (37.0) | (116.0) | (10.0)
Other | (1.0) | 1.0 | (2.0)
Net cash flows from (used for) financing activities | (168.0) | (63.0) | (127.0)
Net increase (decrease) in cash, cash equivalents and restricted cash | 0.0 | 0.0 | 0.0
Cash, cash equivalents and restricted cash at beginning of period | 0.0 | 0.0 | 0.0
Cash, cash equivalents and restricted cash at end of period | 0.0 | 0.0 | 0.0
Supplemental cash flows information: |  |  |
Interest | (2.0) | (9.0) | (4.0)
Income taxes, net | $ 10.0 | $ 14.0 | $ 5.0

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