LEASES (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Lessee, Lease, Description [Line Items]
Operating lease costs	$ 239.6
Operating lease right of use assets		$ 853.9
Operating Lease Liability, Current	151.2
Long-term lease obligations	$ 804.0
Minimum [Member]
Lessee, Lease, Description [Line Items]
Non-cancelable operating lease term	1 year
Maximum [Member]
Lessee, Lease, Description [Line Items]
Non-cancelable operating lease term	20 years
Hydrogen Supply - Second Quarter 2020 [Member]
Lessee, Lease, Description [Line Items]
Lessee, Lease Not Yet Commenced, Term Of Contract	15 years
Lessee, Leases Not Yet Commenced, Liability	$ 212.6
Lease with Affiliate [Member]
Lessee, Lease, Description [Line Items]
Operating lease costs	130.0
Operating lease right of use assets	650.3	$ 604.4
Operating Lease Liability, Current	79.2
Long-term lease obligations	$ 571.1		$ 0.0
Lease with Affiliate [Member] | Minimum [Member]
Lessee, Lease, Description [Line Items]
Non-cancelable operating lease term	7 years
Lease with Affiliate [Member] | Maximum [Member]
Lessee, Lease, Description [Line Items]
Non-cancelable operating lease term	15 years