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Supplemental Guarantor Information (Details 2) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2017 | Mar. 31, 2016 | Dec. 31, 2016
Consolidated Statements of Cash Flows [Abstract] |  |  |
NET CASH PROVIDED FROM (USED FOR) OPERATING ACTIVITIES | $ 785 | $ 650 |
New Financing- |  |  |
Short-term borrowings, net | 75 | 425 |
Redemptions and Repayments- |  |  |
Long-term debt | (211) | (31) |
Other | (13) | (12) |
Net cash (used for) provided from financing activities | (58) | 230 |
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |
Property additions | (588) | (698) |
Nuclear fuel | (132) | (149) |
Sales of investment securities held in trusts | 738 | 465 |
Purchases of investment securities held in trusts | (761) | (488) |
Other | 16 | 39 |
Net cash used for investing activities | (762) | (865) |
Net change in cash and cash equivalents | (35) | 15 |
Cash and cash equivalents at beginning of period | 199 | 131 | $ 131
Cash and cash equivalents at end of period | 164 | 146 | 199
Eliminations |  |  |
Consolidated Statements of Cash Flows [Abstract] |  |  |
NET CASH PROVIDED FROM (USED FOR) OPERATING ACTIVITIES | 0 | 0 |
New Financing- |  |  |
Short-term borrowings, net | (88) | (312) |
Redemptions and Repayments- |  |  |
Long-term debt | 0 |  |
Short-term borrowings, net | 22 | 11 |
Other | 0 | 0 |
Net cash (used for) provided from financing activities | (66) | (301) |
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |
Property additions | 0 | 0 |
Nuclear fuel | 0 | 0 |
Sales of investment securities held in trusts | 0 | 0 |
Purchases of investment securities held in trusts | 0 | 0 |
Cash investments |  | 0 |
Loans to affiliated companies, net | 66 | 301 |
Other |  | 0 |
Net cash used for investing activities | 66 | 301 |
Net change in cash and cash equivalents | 0 | 0 |
Cash and cash equivalents at beginning of period | 0 | 0 | 0
Cash and cash equivalents at end of period | 0 | 0 | 0
FES |  |  |
Consolidated Statements of Cash Flows [Abstract] |  |  |
NET CASH PROVIDED FROM (USED FOR) OPERATING ACTIVITIES | (142) | (356) |
New Financing- |  |  |
Short-term borrowings, net | 100 | 352 |
Redemptions and Repayments- |  |  |
Long-term debt | 0 |  |
Short-term borrowings, net | 0 | 0 |
Other | (1) | 0 |
Net cash (used for) provided from financing activities | 99 | 352 |
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |
Property additions | 0 | (27) |
Nuclear fuel | 0 | 0 |
Sales of investment securities held in trusts | 0 | 0 |
Purchases of investment securities held in trusts | 0 | 0 |
Cash investments |  | 10 |
Loans to affiliated companies, net | 43 | 12 |
Other |  | 9 |
Net cash used for investing activities | 43 | 4 |
Net change in cash and cash equivalents | 0 | 0 |
Cash and cash equivalents at beginning of period | 0 | 0 | 0
Cash and cash equivalents at end of period | 0 | 0 | 0
FG |  |  |
Consolidated Statements of Cash Flows [Abstract] |  |  |
NET CASH PROVIDED FROM (USED FOR) OPERATING ACTIVITIES | 163 | 278 |
New Financing- |  |  |
Short-term borrowings, net | 0 | 8 |
Redemptions and Repayments- |  |  |
Long-term debt | (29) |  |
Short-term borrowings, net | (22) | (11) |
Other | (2) | (3) |
Net cash (used for) provided from financing activities | (53) | (6) |
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |
Property additions | (21) | (53) |
Nuclear fuel | 0 | 0 |
Sales of investment securities held in trusts | 0 | 0 |
Purchases of investment securities held in trusts | 0 | 0 |
Cash investments |  | 0 |
Loans to affiliated companies, net | (89) | (219) |
Other |  | 0 |
Net cash used for investing activities | (110) | (272) |
Net change in cash and cash equivalents | 0 | 0 |
Cash and cash equivalents at beginning of period | 2 | 2 | 2
Cash and cash equivalents at end of period | 2 | 2 | 2
NG |  |  |
Consolidated Statements of Cash Flows [Abstract] |  |  |
NET CASH PROVIDED FROM (USED FOR) OPERATING ACTIVITIES | 200 | 307 |
New Financing- |  |  |
Short-term borrowings, net | 1 | 1 |
Redemptions and Repayments- |  |  |
Long-term debt | 0 |  |
Short-term borrowings, net | 0 | 0 |
Other | 0 | 0 |
Net cash (used for) provided from financing activities | 1 | 1 |
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |
Property additions | (64) | (63) |
Nuclear fuel | (132) | (149) |
Sales of investment securities held in trusts | 231 | 138 |
Purchases of investment securities held in trusts | (245) | (151) |
Cash investments |  | 0 |
Loans to affiliated companies, net | 9 | (83) |
Other |  | 0 |
Net cash used for investing activities | (201) | (308) |
Net change in cash and cash equivalents | 0 | 0 |
Cash and cash equivalents at beginning of period | 0 | 0 | 0
Cash and cash equivalents at end of period | 0 | 0 | 0
Consolidated |  |  |
Consolidated Statements of Cash Flows [Abstract] |  |  |
NET CASH PROVIDED FROM (USED FOR) OPERATING ACTIVITIES | 221 | 229 |
New Financing- |  |  |
Short-term borrowings, net | 13 | 49 |
Redemptions and Repayments- |  |  |
Long-term debt | (29) | 0 |
Short-term borrowings, net | 0 | 0 |
Other | (3) | (3) |
Net cash (used for) provided from financing activities | (19) | 46 |
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |
Property additions | (85) | (143) |
Nuclear fuel | (132) | (149) |
Sales of investment securities held in trusts | 231 | 138 |
Purchases of investment securities held in trusts | (245) | (151) |
Cash investments | 0 | 10 |
Loans to affiliated companies, net | 29 | 11 |
Other | 0 | 9 |
Net cash used for investing activities | (202) | (275) |
Net change in cash and cash equivalents | 0 | 0 |
Cash and cash equivalents at beginning of period | 2 | 2 | 2
Cash and cash equivalents at end of period | $ 2 | $ 2 | $ 2

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