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Reinsurance (Tables)
 6 Months Ended
Jun. 30, 2017
Reinsurance Disclosures [Abstract]  
Effects of reinsurance on premiums and contract charges
The effects of reinsurance on premiums and contract charges are as follows:
($ in millions)
Three months ended June 30,
 
Six months ended June 30,
 
2017
 
2016
 
2017
 
2016
Direct
$
183

 
$
177

 
$
363

 
$
354

Assumed
 
 
 
 
 
 
 
Affiliate
55

 
35

 
108

 
69

Non-affiliate
193

 
202

 
391

 
405

Ceded
 
 
 
 
 
 
 
Affiliate
(13
)
 
(13
)
 
(26
)
 
(26
)
Non-affiliate
(71
)
 
(74
)
 
(141
)
 
(144
)
Premiums and contract charges, net of reinsurance
$
347

 
$
327

 
$
695

 
$
658
Effects of reinsurance on contract benefits
The effects of reinsurance on contract benefits are as follows:
($ in millions)
Three months ended June 30,
 
Six months ended June 30,
 
2017
 
2016
 
2017
 
2016
Direct
$
257

 
$
257

 
$
516

 
$
513

Assumed
 
 
 
 
 
 
 
Affiliate
34

 
20

 
63

 
41

Non-affiliate
147

 
145

 
263

 
278

Ceded
 
 
 
 
 
 
 
Affiliate
(8
)
 
(9
)
 
(16
)
 
(18
)
Non-affiliate
(66
)
 
(72
)
 
(108
)
 
(135
)
Contract benefits, net of reinsurance
$
364

 
$
341

 
$
718

 
$
679
Effects of reinsurance on interest credited to contractholder funds
The effects of reinsurance on interest credited to contractholder funds are as follows:
($ in millions)
Three months ended June 30,
 
Six months ended June 30,
 
2017
 
2016
 
2017
 
2016
Direct
$
140

 
$
154

 
$
276

 
$
315

Assumed
 
 
 
 
 
 
 
Affiliate
2

 
2

 
4

 
4

Non-affiliate
31

 
27

 
64

 
52

Ceded
 
 
 
 
 
 
 
Affiliate
(6
)
 
(5
)
 
(11
)
 
(10
)
Non-affiliate
(6
)
 
(6
)
 
(11
)
 
(11
)
Interest credited to contractholder funds, net of reinsurance
$
161

 
$
172

 
$
322

 
$
350