Reinsurance (Tables)

12 Months Ended

Dec. 31, 2017

Reinsurance Disclosures [Abstract]

Components of Reinsurance Receivables

The following table presents the amounts receivable from reinsurers.

December 31
(In millions)	2017			2016
Reinsurance receivables related to insurance reserves:
Ceded claim and claim adjustment expenses	$	3,934		$	4,094
Ceded future policy benefits	230			212
Reinsurance receivables related to paid losses	126			147
Reinsurance receivables	4,290			4,453
Allowance for uncollectible reinsurance	(29		)	(37		)
Reinsurance receivables, net of allowance for uncollectible reinsurance	$	4,261		$	4,416

Components of Earned and Written Premiums

The effects of reinsurance on earned premiums and written premiums are presented in the following tables.

(In millions)	Direct		Assumed		Ceded		Net		Assumed/ Net %
2017 Earned Premiums
Property and casualty	$	10,447	$	317	$	4,315	$	6,449	4.9	%
Long term care	489		50		—		539		9.3	%
Total earned premiums	$	10,936	$	367	$	4,315	$	6,988	5.3	%
2016 Earned Premiums
Property and casualty	$	10,400	$	258	$	4,270	$	6,388	4.0	%
Long term care	486		50		—		536		9.3	%
Total earned premiums	$	10,886	$	308	$	4,270	$	6,924	4.4	%
2015 Earned Premiums
Property and casualty	$	9,853	$	274	$	3,754	$	6,373	4.3	%
Long term care	498		50		—		548		9.1	%
Total earned premiums	$	10,351	$	324	$	3,754	$	6,921	4.7	%

(In millions)	Direct		Assumed		Ceded		Net		Assumed/ Net %
2017 Written Premiums
Property and casualty	$	10,655	$	327	$	4,449	$	6,533	5.0	%
Long term care	486		50		—		536		9.3	%
Total written premiums	$	11,141	$	377	$	4,449	$	7,069	5.3	%
2016 Written Premiums
Property and casualty	$	10,451	$	245	$	4,255	$	6,441	3.8	%
Long term care	495		52		—		547		9.5	%
Total written premiums	$	10,946	$	297	$	4,255	$	6,988	4.3	%
2015 Written Premiums
Property and casualty	$	9,852	$	270	$	3,702	$	6,420	4.2	%
Long term care	493		49		—		542		9.0	%
Total written premiums	$	10,345	$	319	$	3,702	$	6,962	4.6	%