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Comprehensive Income Parenthetical (Parentheticals) - USD ($) $ in Millions |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Apr. 01, 2017 | Apr. 01, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Net change in unrealized (losses) gains on available-for-sale securities, tax (benefit) provision |  | $ 0.0 |  |  |  |  |  |  | $ (0.1) | $ (0.5)
Net unrealized gains (losses) on cash flow hedges, tax benefit |  |  |  |  |  |  |  | $ 0.0 | 85.9 | 72.2
Postretirement plans and workers' compensation obligations, tax (benefit) provision |  | 0.0 |  |  |  |  |  |  | (1.5) | 36.2
Predecessor |  |  |  |  |  |  |  |  |  |
Income (loss) from continuing operations, net of tax, including portion attributable to noncontrolling interest | $ (319.8) | (195.5) | $ 124.3 | $ (175.2) | $ (97.7) | $ (223.2) | $ (167.7) |  | (663.8) | (1,783.2)
Net change in unrealized (losses) gains on available-for-sale securities, tax (benefit) provision |  | 0.0 |  |  |  |  |  |  | 0.0 | (0.1)
Net unrealized gains (losses) on cash flow hedges, tax benefit |  | 9.1 |  |  |  |  |  |  | 85.9 | 72.2
Postretirement plans and workers' compensation obligations, tax (benefit) provision |  | 2.5 |  |  |  |  |  |  | (1.5) | 36.2
Net income (loss) | (331.9) | (211.7) | 120.2 | (188.3) | (135.8) | (226.2) | (171.1) |  | (721.4) | (1,958.2)
Net Income (Loss) Attributable to Parent | $ (331.9) | $ (216.5) | $ 115.4 | $ (192.7) | $ (137.6) | $ (227.9) | $ (171.1) |  | $ (729.3) | $ (1,965.3)
Income (Loss) from Continuing Operations, Per Basic and Diluted Share |  | $ (10.93) |  |  |  |  |  |  | $ (36.72) | $ (98.65)

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- Definition Amount after tax of income (loss) from continuing operations including portion attributable to the noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=96868048&loc=SL4569616-111683 + Details
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- Definition The amount of net income (loss) from continuing operations per each basic and diluted share of common stock or unit when the per share amount is the same for both basic and diluted shares. + References No definition available. + Details
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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(22)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(18)) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(20)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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- Definition Amount of tax expense (benefit), after reclassification adjustments, of appreciation (loss) in value of unsold available-for-sale securities. Excludes amounts related to other than temporary impairment (OTTI) loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669646-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e640-108580 + Details
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