Maturities of certain current assets and liabilities (Tables)

12 Months Ended

Dec. 31, 2017

Maturities of certain current assets and liabilities

Schedule of maturities of certain current assets and liabilities

	Due within		Due after
December 31, 2017	one year		one year		Total
Construction contract assets	$	104.5	$	23.8	$	128.3
Inventories		52.0		44.5		96.5
Non-financial assets		110.9		14.3		125.2
Non-financial liabilities		209.2		—		209.2
Construction contract liabilities		243.3		15.6		258.9

	Due within		Due after
December 31, 2016	one year		one year		Total
Construction contract assets	$	85.3	$	—	$	85.3
Inventories		64.1		33.5		97.6
Non-financial assets		100.5		23.7		124.2
Non-financial liabilities		12.9		—		12.9
Construction contract liabilities		282.4		10.6		293.0