COMMITMENTS AND CONTINGENCIES (Tables)

12 Months Ended

Dec. 31, 2015

Commitments and Contingencies Disclosure [Abstract]

Contractual commitments under non-cancelable operating leases and purchase contracts

The following table summarizes our contractual commitments under non-cancelable operating leases and purchase contracts as of December 31, 2015:

	Operating Leases		Purchase Commitments
	($ in millions)
2016	$	73.7	$	560.2
2017	60.9		506.4
2018	51.7		449.3
2019	39.5		442.1
2020	27.3		440.3
Thereafter	80.2		2,904.9
Total commitments	$	333.3	$	5,303.2