Related Parties (Tables)

12 Months Ended

Dec. 31, 2016

Related Party Transactions [Abstract]

Schedule of Related Party Transactions

	Years ended December 31,
$ in millions	2016	2015	2014
Affiliated operating revenues:
Investment management fees	3,274.3	3,565.8	3,609.8
Service and distribution fees	822.3	854.0	880.5
Performance fees	21.5	29.2	39.0
Other	79.8	108.5	120.5
Total affiliated operating revenues	4,197.9	4,557.5	4,649.8

	As of December 31,
$ in millions	2016	2015
Affiliated asset balances:
Cash and cash equivalents	476.2	383.3
Unsettled fund receivables	253.2	166.7
Accounts receivable	344.4	317.7
Investments	728.3	982.7
Assets held for policyholders	8,224.2	6,051.2
Other assets	2.9	3.4
Total affiliated asset balances	10,029.2	7,905.0
Affiliated liability balances:
Accrued compensation and benefits	76.5	105.0
Accounts payable and accrued expenses	94.7	82.9
Unsettled fund payables	318.7	248.2
Total affiliated liability balances	489.9	436.1