Accounts Payable and Accrued Expenses (Tables)

9 Months Ended

Sep. 30, 2017

Payables And Accruals [Abstract]

Schedule of accounts payable and accrued expenses

Accounts payable and accrued expenses at September 30, 2017 and December 31, 2016 are summarized as follows:

($ in millions)	September 30, 2017		December 31, 2016
Trade accounts payable	$	210.4	$	157.7
Employee-related expenses		33.6		28.1
Accrued vacation		21.9		21.8
Miscellaneous accrued expenses		94.4		113.6
Total	$	360.3	$	321.2