INCOME TAXES - NET OPERATING LOSSES (Details) - Jun. 30, 2015 - USD ($) $ in Millions	Total
Operating Loss Carryforwards [Line Items]
Total loss carryforwards	$ 3,400.8
Total loss carryforwards, unrecognized tax benefit	(540.3)
Total loss carryforwards, net of unrecognized tax benefits	2,860.5
Life insurance companies [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	715.0
Net operating loss carryforward, unrecognized tax benefit	(342.9)
Net operating loss carryforwards, net of unrecognized tax benefits	372.1
Non life insurance companies [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	2,685.8
Net operating loss carryforward, unrecognized tax benefit	(197.4)
Net operating loss carryforwards, net of unrecognized tax benefits	$ 2,488.4
Carryforward Expiration 2023 [Member]
Operating Loss Carryforwards [Line Items]
Year of expiration	Dec. 31, 2023
Total loss carryforwards	$ 2,698.0
Carryforward Expiration 2023 [Member] | Life insurance companies [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	715.0
Carryforward Expiration 2023 [Member] | Non life insurance companies [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 1,983.0
Carryforward Expiration 2025 [Member]
Operating Loss Carryforwards [Line Items]
Year of expiration	Dec. 31, 2025
Total loss carryforwards	$ 91.5
Carryforward Expiration 2025 [Member] | Life insurance companies [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	0.0
Carryforward Expiration 2025 [Member] | Non life insurance companies [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 91.5
Carryforward Expiration 2026 [Member]
Operating Loss Carryforwards [Line Items]
Year of expiration	Dec. 31, 2026
Total loss carryforwards	$ 207.4
Carryforward Expiration 2026 [Member] | Life insurance companies [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	0.0
Carryforward Expiration 2026 [Member] | Non life insurance companies [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 207.4
Carryforward Expiration 2027 [Member]
Operating Loss Carryforwards [Line Items]
Year of expiration	Dec. 31, 2027
Total loss carryforwards	$ 4.9
Carryforward Expiration 2027 [Member] | Life insurance companies [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	0.0
Carryforward Expiration 2027 [Member] | Non life insurance companies [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 4.9
Carryforward Expiration 2028 [Member]
Operating Loss Carryforwards [Line Items]
Year of expiration	Dec. 31, 2028
Total loss carryforwards	$ 203.7
Carryforward Expiration 2028 [Member] | Life insurance companies [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	0.0
Carryforward Expiration 2028 [Member] | Non life insurance companies [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 203.7
Carryforward Expiration 2029 [Member]
Operating Loss Carryforwards [Line Items]
Year of expiration	Dec. 31, 2029
Total loss carryforwards	$ 146.6
Carryforward Expiration 2029 [Member] | Life insurance companies [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	0.0
Carryforward Expiration 2029 [Member] | Non life insurance companies [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 146.6
Carryforward Expiration 2032 [Member]
Operating Loss Carryforwards [Line Items]
Year of expiration	Dec. 31, 2032
Total loss carryforwards	$ 44.0
Carryforward Expiration 2032 [Member] | Life insurance companies [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	0.0
Carryforward Expiration 2032 [Member] | Non life insurance companies [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 44.0
Carryforward Expiration 2035 [Member]
Operating Loss Carryforwards [Line Items]
Year of expiration	Dec. 31, 2035
Total loss carryforwards	$ 4.7
Carryforward Expiration 2035 [Member] | Life insurance companies [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	0.0
Carryforward Expiration 2035 [Member] | Non life insurance companies [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 4.7