Consolidated Statements of Cash Flows - Significant Non Cash Transactions (Parenthetical) - USD ($) $ in Millions	3 Months Ended			12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Mar. 31, 2013	Dec. 31, 2013
Statement of Cash Flows [Abstract]
Decrease From Reinsurance Amendments During Noncash or Partial Noncash Transaction	$ 178	$ 704	$ 132
Decrease From Noncash Tax Settlement With Affiliate	$ 61	25
Increase From Reinsurance Amendments During Noncash or Partial Noncash Transaction		$ 192	$ 56
Increase From CoInsurance Agreements Acquired During Noncash or Partial Noncash Transaction				$ 4,951
Decrease From CoInsurance Agreements Acquired During Noncash or Partial Noncash Transaction				4,952
Decrease From CoInsurance Agreement Asset Transfers Acquired During Noncash or Partial Noncash Transaction				$ 12