CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Sep. 30, 2017	Sep. 30, 2016
Statement of Financial Position [Abstract]
Short-term Debt	$ 178.7	$ 258.0
Long Term Debt Current And Non Current	5,774.1	5,525.8
Investments ():
Cash and cash equivalents	270.1	465.2
Other receivables, net (Note 8)	569.8	539.1
Inventories, net (Note 9)	775.5	740.6
Deferred tax assets (Note 18)	20.2	18.3
Property, plant and equipment, net (Note 10)	700.7	543.4
Goodwill (Note 11)	2,626.0	2,478.4
Intangibles, net (Note 11)	2,424.0	2,372.5
Other assets	137.2	138.3
Disposal Group, Including Discontinued Operation, Assets, Current	28,326.2	26,284.3
Total assets	35,849.7	33,580.1
Long-term Debt, Excluding Current Maturities	5,595.4	5,267.8
Insurance reserves:
Accounts Payable and Other Accrued Liabilities, Current	1,115.6	983.2
Other Accrued Liabilities, Current	215.4	188.5
Employee benefit obligations (Note 17)	87.5	125.4
Deferred tax liabilities (Note 18)	531.4	546.0
Other liabilities	43.5	28.7
Disposal Group, Including Discontinued Operation, Liabilities, Current	26,350.7	24,553.8
Total liabilities	33,902.8	31,762.9
Commitments and contingencies (Note 21)
Temporary equity (Note 16) :
Common stock, $0.01 par; 500,000.0 thousand shares authorized; 200,624.9 thousand and 200,789.1 thousand shares issued and outstanding at September 30, 2017 and 2016, respectively.	2.0	2.0
Additional paid-in capital	1,372.9	1,447.1
Accumulated deficit	(925.9)	(1,031.9)
Accumulated other comprehensive income	309.0	220.9
Total HRG Group, Inc. shareholders' equity	758.0	638.1
Noncontrolling interest	1,188.9	1,179.1
Total shareholders' equity	1,946.9	1,817.2
Total liabilities and equity	$ 35,849.7	$ 33,580.1