Equity Equity - AOCI Changes Net of Tax Table (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended								12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 30, 2013 Accumulated Other Comprehensive Income (Loss) [Member]	Dec. 31, 2013 Accumulated Other Comprehensive Income (Loss) [Member]	Dec. 30, 2013 Accumulated Other Comprehensive Income (Loss) [Member] Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]	Dec. 31, 2013 Accumulated Other Comprehensive Income (Loss) [Member] Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]	Dec. 31, 2012 Accumulated Other Comprehensive Income (Loss) [Member] Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]	Dec. 30, 2013 Accumulated Other Comprehensive Income (Loss) [Member] Accumulated Net Unrealized Investment Gain (Loss) [Member]	Dec. 31, 2013 Accumulated Other Comprehensive Income (Loss) [Member] Accumulated Net Unrealized Investment Gain (Loss) [Member]	Dec. 31, 2012 Accumulated Other Comprehensive Income (Loss) [Member] Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
AOCI (Loss), Net of Tax - Period Start	$ (182)				$ (182)		$ (167)	$ (189)		$ 5	$ 7
Other comprehensive income before reclassifications				(4)		2			(6)
Amounts reclassified from accumulated other comprehensive income				24	24	20			4
Net current period other comprehensive income	20	(16)	2	20		22			(2)
AOCI (Loss), Net of Tax - Period End	$ (162)	$ (182)			$ (162)		$ (167)	$ (189)		$ 5	$ 7