Deferred Acquisition Costs (Tables)

12 Months Ended

Dec. 31, 2017

Deferred Acquisition Costs

Deferred Acquisition Costs Rollforward (Table)

	For the year ended December 31,
	2017			2016			2015
	(in millions)
Balance at beginning of year	$	3,380.2		$	3,276.1		$	2,993.0
Costs deferred during the year		421.8			402.3			390.3
Amortized to expense during the year (1)		(234.6	)		(285.1	)		(270.8	)
Adjustment related to unrealized (gains) losses on available-for-sale securities and derivative instruments		(26.7	)		(13.1	)		164.5
Other		—			—			(0.9	)
Balance at end of year	$	3,540.7		$	3,380.2		$	3,276.1

(1)Includes adjustments for revisions to estimated gross profits.