Income Taxes - Narratives (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013		Sep. 30, 2014	Sep. 30, 2013
Income Tax Disclosure [Abstract]
Provision (benefit) for federal income taxes	$ 1,787	$ 1,355	[1]	$ 6,123	$ (47,231)	[1],[2]
Effective Income Tax Rate Reconciliation, Percent	31.40%	13.40%		32.20%	(155.90%)
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	35.00%	35.00%		35.00%	35.00%

[1] Certain prior period amounts have been reclassified to conform to our current period presentation.

[2] Primarily represented the release of the valuation allowance for our deferred tax assets that generally is directly attributable to each segment based on the nature of the item.