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Reinsurance
 9 Months Ended
Sep. 30, 2017
Reinsurance Disclosures [Abstract]  
Reinsurance
Reinsurance
The effects of reinsurance on premiums and contract charges are as follows:
($ in millions)
Three months ended September 30,
 
Nine months ended September 30,
 
2017
 
2016
 
2017
 
2016
Direct
$
182

 
$
178

 
$
545

 
$
532

Assumed
 
 
 
 
 
 
 
Affiliate
58

 
34

 
166

 
103

Non-affiliate
191

 
200

 
582

 
605

Ceded
 
 
 
 
 
 
 
Affiliate
(13
)
 
(14
)
 
(39
)
 
(40
)
Non-affiliate
(72
)
 
(74
)
 
(213
)
 
(218
)
Premiums and contract charges, net of reinsurance
$
346

 
$
324

 
$
1,041

 
$
982


The effects of reinsurance on contract benefits are as follows:
($ in millions)
Three months ended September 30,
 
Nine months ended September 30,
 
2017
 
2016
 
2017
 
2016
Direct
$
236

 
$
243

 
$
752

 
$
756

Assumed
 
 
 
 
 
 
 
Affiliate
30

 
24

 
93

 
65

Non-affiliate
116

 
130

 
379

 
408

Ceded
 
 
 
 
 
 
 
Affiliate
(8
)
 
(8
)
 
(24
)
 
(26
)
Non-affiliate
(43
)
 
(22
)
 
(151
)
 
(157
)
Contract benefits, net of reinsurance
$
331

 
$
367

 
$
1,049

 
$
1,046


The effects of reinsurance on interest credited to contractholder funds are as follows:
($ in millions)
Three months ended September 30,
 
Nine months ended September 30,
 
2017
 
2016
 
2017
 
2016
Direct
$
137

 
$
147

 
$
413

 
$
462

Assumed
 
 
 
 
 
 
 
Affiliate
2

 
3

 
6

 
7

Non-affiliate
33

 
33

 
97

 
85

Ceded
 
 
 
 
 
 
 
Affiliate
(5
)
 
(6
)
 
(16
)
 
(16
)
Non-affiliate
(6
)
 
(7
)
 
(17
)
 
(18
)
Interest credited to contractholder funds, net of reinsurance
$
161

 
$
170

 
$
483

 
$
520