Hardy Schedule of fair value of assets acquired and liabilities assumed (Details) (USD $) In Millions, unless otherwise specified	Jul. 03, 2012
Business Acquisition [Line Items]
Fixed maturity securities	$ 117
Short term investments	255
Total investments	372
Cash	34
Reinsurance receivables	252
Insurance receivables	222
Accrued investment income	2
Property and equipment	4
Goodwill and other intangible assets	171
Other assets	109
Total assets acquired	1,166
Claim and claim adjustment expenses	500
Unearned premiums	249
Long-term debt	30
Other liabilities	156
Total liabilities assumed	$ 935